? 在上一次 查看tomcat啟動(dòng)文件都干點(diǎn)啥 一文中，我們總結(jié)出， startup.bat文件的作用就是找到catalina.bat文件，然后把參數(shù)傳遞給它，在startup.bat中，調(diào)用catalina.bat的命令 call "%EXECUTABLE%" start %CMD_LINE_ARGS%，其中"%EXECUTABLE%"這個(gè)就是catalina.bat文件，這個(gè)命令至少向catalina.bat傳遞一個(gè)參數(shù)--start.
? ? ? 接下來(lái)看一下catalina.bat中的內(nèi)容，內(nèi)容很長(zhǎng)：
1
@echo
off
2
rem
Licensed to the Apache Software Foundation (ASF) under one or more
3
rem
contributor license agreements. See the NOTICE file distributed with
4
rem
this work for additional information regarding copyright ownership.
5
rem
The ASF licenses this file to You under the Apache License, Version 2.0
6
rem
(the "License"); you may not use this file except in compliance with
7
rem
the License. You may obtain a copy of the License at
8
rem
9
rem
http://www.apache.org/licenses/LICENSE-2.0
10
rem
11
rem
Unless required by applicable law or agreed to in writing, software
12
rem
distributed under the License is distributed on an "AS IS" BASIS,
13
rem
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14
rem
See the License for the specific language governing permissions and
15
rem
limitations under the License.
16
17
if
"%OS%" == "Windows_NT"
setlocal
18
rem
---------------------------------------------------------------------------
19
rem
Start/Stop Script for the CATALINA Server
20
rem
21
rem
Environment Variable Prerequisites
22
rem
23
rem
CATALINA_HOME May point at your Catalina "build" directory.
24
rem
25
rem
CATALINA_BASE (Optional) Base directory for resolving dynamic portions
26
rem
of a Catalina installation. If not present, resolves to
27
rem
the same directory that CATALINA_HOME points to.
28
rem
29
rem
CATALINA_OPTS (Optional) Java runtime options used when the "start",
30
rem
or "run" command is executed.
31
rem
32
rem
CATALINA_TMPDIR (Optional) Directory path location of temporary directory
33
rem
the JVM should use (java.io.tmpdir). Defaults to
34
rem
%CATALINA_BASE%\temp.
35
rem
36
rem
JAVA_HOME Must point at your Java Development Kit installation.
37
rem
Required to run the with the "debug" argument.
38
rem
39
rem
JRE_HOME Must point at your Java Runtime installation.
40
rem
Defaults to JAVA_HOME if empty.
41
rem
42
rem
JAVA_OPTS (Optional) Java runtime options used when the "start",
43
rem
"stop", or "run" command is executed.
44
rem
45
rem
JAVA_ENDORSED_DIRS (Optional) Lists of of semi-colon separated directories
46
rem
containing some jars in order to allow replacement of APIs
47
rem
created outside of the JCP (i.e. DOM and SAX from W3C).
48
rem
It can also be used to update the XML parser implementation.
49
rem
Defaults to $CATALINA_HOME/endorsed.
50
rem
51
rem
JPDA_TRANSPORT (Optional) JPDA transport used when the "jpda start"
52
rem
command is executed. The default is "dt_socket".
53
rem
54
rem
JPDA_ADDRESS (Optional) Java runtime options used when the "jpda start"
55
rem
command is executed. The default is 8000.
56
rem
57
rem
JPDA_SUSPEND (Optional) Java runtime options used when the "jpda start"
58
rem
command is executed. Specifies whether JVM should suspend
59
rem
execution immediately after startup. Default is "n".
60
rem
61
rem
JPDA_OPTS (Optional) Java runtime options used when the "jpda start"
62
rem
command is executed. If used, JPDA_TRANSPORT, JPDA_ADDRESS,
63
rem
and JPDA_SUSPEND are ignored. Thus, all required jpda
64
rem
options MUST be specified. The default is:
65
rem
66
rem
-agentlib:jdwp=transport=%JPDA_TRANSPORT%,
67
rem
address=%JPDA_ADDRESS%,server=y,suspend=%JPDA_SUSPEND%
68
rem
69
rem
LOGGING_CONFIG (Optional) Override Tomcat's logging config file
70
rem
Example (all one line)
71
rem
set LOGGING_CONFIG="-Djava.util.logging.config.file=%CATALINA_BASE%\conf\logging.properties"
72
rem
73
rem
LOGGING_MANAGER (Optional) Override Tomcat's logging manager
74
rem
Example (all one line)
75
rem
set LOGGING_MANAGER="-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager"
76
rem
77
rem
TITLE (Optional) Specify the title of Tomcat window. The default
78
rem
TITLE is Tomcat if it's not specified.
79
rem
Example (all one line)
80
rem
set TITLE=Tomcat.Cluster#1.Server#1 [%DATE% %TIME%]
81
rem
82
rem
83
rem
84
rem
$Id: catalina.bat 1040546 2010-11-30 14:47:34Z markt $
85
rem
---------------------------------------------------------------------------
86
87
rem
Suppress Terminate batch job on CTRL+C
88
if
not
""
%1
"" == ""
run
""
goto
mainEntry
89
if
""%TEMP%"" == """"
goto
mainEntry
90
if
exist
"%TEMP%\%~nx0.run"
goto
mainEntry
91
echo
Y>"%TEMP%\%~nx0.run"
92
if
not
exist
"%TEMP%\%~nx0.run"
goto
mainEntry
93
echo
Y>"%TEMP%\%~nx0.Y"
94
call
"%~f0" %* <"%TEMP%\%~nx0.Y"
95
rem
Use provided errorlevel
96
set
RETVAL=%
ERRORLEVEL
%
97
del
/Q "%TEMP%\%~nx0.Y" >NUL 2>&1
98
exit
/
B %RETVAL%
99
:mainEntry
100
del
/Q "%TEMP%\%~nx0.run" >NUL 2>&1
101
102
rem
Guess CATALINA_HOME if not defined
103
set
"CURRENT_DIR=%cd%"
104
if
not
"%CATALINA_HOME%" == ""
goto
gotHome
105
set
"CATALINA_HOME=%CURRENT_DIR%"
106
if
exist
"%CATALINA_HOME%\bin\catalina.bat"
goto
okHome
107
cd
..
108
set
"CATALINA_HOME=%cd%"
109
cd
"%CURRENT_DIR%"
110
:gotHome
111
if
exist
"%CATALINA_HOME%\bin\catalina.bat"
goto
okHome
112
echo
The CATALINA_HOME environment variable is
not
defined correctly
113
echo
This environment variable is needed to
run
this program
114
goto
end
115
:okHome
116
117
rem
Ensure that any user defined CLASSPATH variables are not used on startup,
118
rem
but allow them to be specified in setenv.bat, in rare case when it is needed.
119
set
CLASSPATH=
120
121
rem
Get standard environment variables
122
if
"%CATALINA_BASE%" == ""
goto
gotSetenvHome
123
if
exist
"%CATALINA_BASE%\bin\setenv.bat"
call
"%CATALINA_BASE%\bin\setenv.bat"
124
goto
gotSetenvBase
125
:gotSetenvHome
126
if
exist
"%CATALINA_HOME%\bin\setenv.bat"
call
"%CATALINA_HOME%\bin\setenv.bat"
127
:gotSetenvBase
128
129
rem
Get standard Java environment variables
130
if
exist
"%CATALINA_HOME%\bin\setclasspath.bat"
goto
okSetclasspath
131
echo
Cannot
find
"%CATALINA_HOME%\bin\setclasspath.bat"
132
echo
This file is needed to
run
this program
133
goto
end
134
:okSetclasspath
135
set
"BASEDIR=%CATALINA_HOME%"
136
call
"%CATALINA_HOME%\bin\setclasspath.bat"
%1
137
if
errorlevel
1
goto
end
138
139
rem
Add on extra jar file to CLASSPATH
140
rem
Note that there are no quotes as we do not want to introduce random
141
rem
quotes into the CLASSPATH
142
if
"%CLASSPATH%" == ""
goto
emptyClasspath
143
set
"CLASSPATH=%CLASSPATH%;"
144
:emptyClasspath
145
set
"CLASSPATH=%CLASSPATH%%CATALINA_HOME%\bin\bootstrap.jar"
146
147
if
not
"%CATALINA_BASE%" == ""
goto
gotBase
148
set
"CATALINA_BASE=%CATALINA_HOME%"
149
:gotBase
150
151
if
not
"%CATALINA_TMPDIR%" == ""
goto
gotTmpdir
152
set
"CATALINA_TMPDIR=%CATALINA_BASE%\temp"
153
:gotTmpdir
154
155
rem
Add tomcat-juli.jar to classpath
156
rem
tomcat-juli.jar can be over-ridden per instance
157
if
not
exist
"%CATALINA_BASE%\bin\tomcat-juli.jar"
goto
juliClasspathHome
158
set
"CLASSPATH=%CLASSPATH%;%CATALINA_BASE%\bin\tomcat-juli.jar"
159
goto
juliClasspathDone
160
:juliClasspathHome
161
set
"CLASSPATH=%CLASSPATH%;%CATALINA_HOME%\bin\tomcat-juli.jar"
162
:juliClasspathDone
163
164
if
not
"%LOGGING_CONFIG%" == ""
goto
noJuliConfig
165
set
LOGGING_CONFIG=
-Dnop
166
if
not
exist
"%CATALINA_BASE%\conf\logging.properties"
goto
noJuliConfig
167
set
LOGGING_CONFIG=-Djava.util.logging.config.file="%CATALINA_BASE%\conf\logging.properties"
168
:noJuliConfig
169
set
JAVA_OPTS=
%JAVA_OPTS% %LOGGING_CONFIG%
170
171
if
not
"%LOGGING_MANAGER%" == ""
goto
noJuliManager
172
set
LOGGING_MANAGER=-Djava.util.logging.manager=org.apache.juli.
ClassLoaderLogManager
173
:noJuliManager
174
set
JAVA_OPTS=
%JAVA_OPTS% %LOGGING_MANAGER%
175
176
rem
----- Execute The Requested Command ---------------------------------------
177
178
echo
Using CATALINA_BASE: "%CATALINA_BASE%"
179
echo
Using CATALINA_HOME: "%CATALINA_HOME%"
180
echo
Using CATALINA_TMPDIR: "%CATALINA_TMPDIR%"
181
if
""
%1
"" == ""
debug
""
goto
use_jdk
182
echo
Using JRE_HOME: "%JRE_HOME%"
183
goto
java_dir_displayed
184
:use_jdk
185
echo
Using JAVA_HOME: "%JAVA_HOME%"
186
:java_dir_displayed
187
echo
Using CLASSPATH: "%CLASSPATH%"
188
189
set
_EXECJAVA=
%_RUNJAVA%
190
set
MAINCLASS=org.apache.catalina.startup.
Bootstrap
191
set
ACTION=
start
192
set
SECURITY_POLICY_FILE=
193
set
DEBUG_OPTS=
194
set
JPDA=
195
196
if
not
""
%1
"" == ""jpda""
goto
noJpda
197
set
JPDA=
jpda
198
if
not
"%JPDA_TRANSPORT%" == ""
goto
gotJpdaTransport
199
set
JPDA_TRANSPORT=
dt_socket
200
:gotJpdaTransport
201
if
not
"%JPDA_ADDRESS%" == ""
goto
gotJpdaAddress
202
set
JPDA_ADDRESS=8000
203
:gotJpdaAddress
204
if
not
"%JPDA_SUSPEND%" == ""
goto
gotJpdaSuspend
205
set
JPDA_SUSPEND=
n
206
:gotJpdaSuspend
207
if
not
"%JPDA_OPTS%" == ""
goto
gotJpdaOpts
208
set
JPDA_OPTS=-agentlib
:jdwp
=transport=%JPDA_TRANSPORT%,address=%JPDA_ADDRESS%,server=y,suspend=
%JPDA_SUSPEND%
209
:gotJpdaOpts
210
shift
211
:noJpda
212
213
if
""
%1
"" == ""
debug
""
goto
doDebug
214
if
""
%1
"" == ""
run
""
goto
doRun
215
if
""
%1
"" == ""
start
""
goto
doStart
216
if
""
%1
"" == ""stop""
goto
doStop
217
if
""
%1
"" == ""version""
goto
doVersion
218
219
echo
Usage: catalina ( commands ... )
220
echo
commands:
221
echo
debug
Start
Catalina in a debugger
222
echo
debug
-security
Debug
Catalina with a security manager
223
echo
jpda
start
Start
Catalina under JPDA debugger
224
echo
run
Start
Catalina in the current window
225
echo
run
-security
Start
in the current window with security manager
226
echo
start
Start
Catalina in a separate window
227
echo
start
-security
Start
in a separate window with security manager
228
echo
stop Stop Catalina
229
echo
version What version of tomcat are you running?
230
goto
end
231
232
:doDebug
233
shift
234
set
_EXECJAVA=
%_RUNJDB%
235
set
DEBUG_OPTS=-sourcepath "%CATALINA_HOME%\..\..\java"
236
if
not
""
%1
"" == ""-security""
goto
execCmd
237
shift
238
echo
Using Security Manager
239
set
"SECURITY_POLICY_FILE=%CATALINA_BASE%\conf\catalina.policy"
240
goto
execCmd
241
242
:doRun
243
shift
244
if
not
""
%1
"" == ""-security""
goto
execCmd
245
shift
246
echo
Using Security Manager
247
set
"SECURITY_POLICY_FILE=%CATALINA_BASE%\conf\catalina.policy"
248
goto
execCmd
249
250
:doStart
251
shift
252
if
not
"%OS%" == "Windows_NT"
goto
noTitle
253
if
"%TITLE%" == ""
set
TITLE=
Tomcat
254
set
_EXECJAVA=
start
"%TITLE%"
%_RUNJAVA%
255
goto
gotTitle
256
:noTitle
257
set
_EXECJAVA=
start
%_RUNJAVA%
258
:gotTitle
259
if
not
""
%1
"" == ""-security""
goto
execCmd
260
shift
261
echo
Using Security Manager
262
set
"SECURITY_POLICY_FILE=%CATALINA_BASE%\conf\catalina.policy"
263
goto
execCmd
264
265
:doStop
266
shift
267
set
ACTION=
stop
268
set
CATALINA_OPTS=
269
goto
execCmd
270
271
:doVersion
272
%_EXECJAVA% -classpath "%CATALINA_HOME%\lib\catalina.jar" org.apache.catalina.util.
ServerInfo
273
goto
end
274
275
276
:execCmd
277
rem
Get remaining unshifted command line arguments and save them in the
278
set
CMD_LINE_ARGS=
279
:setArgs
280
if
""
%1
""==""""
goto
doneSetArgs
281
set
CMD_LINE_ARGS=%CMD_LINE_ARGS%
%1
282
shift
283
goto
setArgs
284
:doneSetArgs
285
286
rem
Execute Java with the applicable properties
287
if
not
"%JPDA%" == ""
goto
doJpda
288
if
not
"%SECURITY_POLICY_FILE%" == ""
goto
doSecurity
289
%_EXECJAVA% %JAVA_OPTS% %CATALINA_OPTS% %DEBUG_OPTS% -Djava.endorsed.dirs="%JAVA_ENDORSED_DIRS%" -classpath "%CLASSPATH%" -Dcatalina.base="%CATALINA_BASE%" -Dcatalina.home="%CATALINA_HOME%" -Djava.io.tmpdir="%CATALINA_TMPDIR%"
%MAINCLASS% %CMD_LINE_ARGS% %ACTION%
290
goto
end
291
:doSecurity
292
%_EXECJAVA% %JAVA_OPTS% %CATALINA_OPTS% %DEBUG_OPTS% -Djava.endorsed.dirs="%JAVA_ENDORSED_DIRS%" -classpath "%CLASSPATH%" -Djava.security.manager -Djava.security.policy=="%SECURITY_POLICY_FILE%" -Dcatalina.base="%CATALINA_BASE%" -Dcatalina.home="%CATALINA_HOME%" -Djava.io.tmpdir="%CATALINA_TMPDIR%"
%MAINCLASS% %CMD_LINE_ARGS% %ACTION%
293
goto
end
294
:doJpda
295
if
not
"%SECURITY_POLICY_FILE%" == ""
goto
doSecurityJpda
296
%_EXECJAVA% %JAVA_OPTS% %CATALINA_OPTS% %JPDA_OPTS% %DEBUG_OPTS% -Djava.endorsed.dirs="%JAVA_ENDORSED_DIRS%" -classpath "%CLASSPATH%" -Dcatalina.base="%CATALINA_BASE%" -Dcatalina.home="%CATALINA_HOME%" -Djava.io.tmpdir="%CATALINA_TMPDIR%"
%MAINCLASS% %CMD_LINE_ARGS% %ACTION%
297
goto
end
298
:doSecurityJpda
299
%_EXECJAVA% %JAVA_OPTS% %CATALINA_OPTS% %JPDA_OPTS% %DEBUG_OPTS% -Djava.endorsed.dirs="%JAVA_ENDORSED_DIRS%" -classpath "%CLASSPATH%" -Djava.security.manager -Djava.security.policy=="%SECURITY_POLICY_FILE%" -Dcatalina.base="%CATALINA_BASE%" -Dcatalina.home="%CATALINA_HOME%" -Djava.io.tmpdir="%CATALINA_TMPDIR%"
%MAINCLASS% %CMD_LINE_ARGS% %ACTION%
300
goto
end
301
302
:end
在第1行，和第17行中的內(nèi)容已經(jīng)在前一章中做出說(shuō)明，在此處不再敖述，我對(duì)于18-85行的這段注釋比較感興趣：
1
rem
---------------------------------------------------------------------------
2
rem
Start/Stop Script for the CATALINA Server
3
rem
4
rem
Environment Variable Prerequisites
5
rem
6
rem
CATALINA_HOME May point at your Catalina "build" directory.
7
rem
8
rem
CATALINA_BASE (Optional) Base directory for resolving dynamic portions
9
rem
of a Catalina installation. If not present, resolves to
10
rem
the same directory that CATALINA_HOME points to.
11
rem
12
rem
CATALINA_OPTS (Optional) Java runtime options used when the "start",
13
rem
or "run" command is executed.
14
rem
15
rem
CATALINA_TMPDIR (Optional) Directory path location of temporary directory
16
rem
the JVM should use (java.io.tmpdir). Defaults to
17
rem
%CATALINA_BASE%\temp.
18
rem
19
rem
JAVA_HOME Must point at your Java Development Kit installation.
20
rem
Required to run the with the "debug" argument.
21
rem
22
rem
JRE_HOME Must point at your Java Runtime installation.
23
rem
Defaults to JAVA_HOME if empty.
24
rem
25
rem
JAVA_OPTS (Optional) Java runtime options used when the "start",
26
rem
"stop", or "run" command is executed.
27
rem
28
rem
JAVA_ENDORSED_DIRS (Optional) Lists of of semi-colon separated directories
29
rem
containing some jars in order to allow replacement of APIs
30
rem
created outside of the JCP (i.e. DOM and SAX from W3C).
31
rem
It can also be used to update the XML parser implementation.
32
rem
Defaults to $CATALINA_HOME/endorsed.
33
rem
34
rem
JPDA_TRANSPORT (Optional) JPDA transport used when the "jpda start"
35
rem
command is executed. The default is "dt_socket".
36
rem
37
rem
JPDA_ADDRESS (Optional) Java runtime options used when the "jpda start"
38
rem
command is executed. The default is 8000.
39
rem
40
rem
JPDA_SUSPEND (Optional) Java runtime options used when the "jpda start"
41
rem
command is executed. Specifies whether JVM should suspend
42
rem
execution immediately after startup. Default is "n".
43
rem
44
rem
JPDA_OPTS (Optional) Java runtime options used when the "jpda start"
45
rem
command is executed. If used, JPDA_TRANSPORT, JPDA_ADDRESS,
46
rem
and JPDA_SUSPEND are ignored. Thus, all required jpda
47
rem
options MUST be specified. The default is:
48
rem
49
rem
-agentlib:jdwp=transport=%JPDA_TRANSPORT%,
50
rem
address=%JPDA_ADDRESS%,server=y,suspend=%JPDA_SUSPEND%
51
rem
52
rem
LOGGING_CONFIG (Optional) Override Tomcat's logging config file
53
rem
Example (all one line)
54
rem
set LOGGING_CONFIG="-Djava.util.logging.config.file=%CATALINA_BASE%\conf\logging.properties"
55
rem
56
rem
LOGGING_MANAGER (Optional) Override Tomcat's logging manager
57
rem
Example (all one line)
58
rem
set LOGGING_MANAGER="-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager"
59
rem
60
rem
TITLE (Optional) Specify the title of Tomcat window. The default
61
rem
TITLE is Tomcat if it's not specified.
62
rem
Example (all one line)
63
rem
set TITLE=Tomcat.Cluster#1.Server#1 [%DATE% %TIME%]
64
rem
65
rem
66
rem
67
rem
$Id: catalina.bat 1040546 2010-11-30 14:47:34Z markt $
68
rem
---------------------------------------------------------------------------
這段的內(nèi)容就是說(shuō)明一下在啟動(dòng)和停止CATALINA server時(shí)候需要的一下先決條件，CATALINA_HOME--看到這個(gè)大家可能會(huì)有點(diǎn)疑問(wèn)，如果在操作系統(tǒng)上沒(méi)有設(shè)置CATALINA_HOME變量的時(shí)候，那么這個(gè)變量應(yīng)該是不存在的丫，是怎么回事呢？是不是？下面我們還是用測(cè)試來(lái)說(shuō)明問(wèn)題：我在F:\apache-tomcat-7.0.8\bin目錄下創(chuàng)建一個(gè)test.bat文件，文件內(nèi)容如下：
@echo
off
set
CURRENT_DIR=%
cd
%
test2
.bat
? ?意思很簡(jiǎn)單，只是將%cd%變量的值賦給CURRENT_DIR變量，然后調(diào)用test2.bat文件，test2.bat文件的內(nèi)容如下：
echo
%CURRENT_DIR%
? 只是簡(jiǎn)單的輸出%CURRENT_DIR%變量，讓我們先運(yùn)行test.bat文件，查看%CURRENT_DIR%變量是否能夠正確輸出：
? ? ? ?結(jié)果正確顯示了，但是如果我們直接運(yùn)行test2.bat文件會(huì)有什么結(jié)果呢？
? ? ? 結(jié)果顯示不正常，這個(gè)測(cè)試就說(shuō)明由test.bat調(diào)用test2.bat文件時(shí)候，test.bat中定義的變量在test2.bat中可見，就是CURRENT_DIR變量的生命周期范圍并不是僅限于本文件，也能加深對(duì)于setlocal方法的理解。回到catalina.bat本身，也許我們本身沒(méi)有設(shè)置CATALINA_HOME環(huán)境變量的習(xí)慣，但是回想一下上一節(jié)，在startup.bat中說(shuō)到，如果沒(méi)有設(shè)置CATALINA_HOME變量，startup.bat內(nèi)會(huì)給CATALINA_HOME變量賦值，然后在catalina.bat中依然能夠訪問(wèn)此變量。
? ? ?這段注釋說(shuō)完之后，看一下88行：?
if
not
""
%1
"" == ""
run
""
goto
mainEntry
如果接收到的第一個(gè)參數(shù)是run那么到:mainEntry節(jié)點(diǎn)，事實(shí)是我們從startup.bat調(diào)用的時(shí)候傳遞的第一個(gè)參數(shù)無(wú)疑是start，所以應(yīng)該順序執(zhí)行到第89行，這里可能有人會(huì)有疑問(wèn)，那什么時(shí)候第一個(gè)參數(shù)才是run呢？事情是這樣的，因?yàn)椴⒉皇撬腥硕际歉覀円粯又苯邮褂胹tartup.bat文件啟動(dòng)，因?yàn)閟tartup.bat文件也只不過(guò)就是找到catalina.bat文件，然后照樣傳遞參數(shù)，其實(shí)有經(jīng)驗(yàn)的人大可直接使用catalina.bat文件來(lái)啟動(dòng)tomcat。這就是第一個(gè)參數(shù)為run的產(chǎn)生情況。接下來(lái)我們順序執(zhí)行到第89行。
? ? 看一下89行的內(nèi)容：
if
""%TEMP%"" == """"
goto
mainEntry
?如果TEMP變量為空，那么到mainEntry節(jié)點(diǎn)，這個(gè)時(shí)候我們就需要看看我們到底有沒(méi)有這個(gè)TEMP變量，同樣弄個(gè)小測(cè)試，寫一個(gè)小的測(cè)試test.bat文件，文件內(nèi)容如下：
@echo
off
echo
%TEMP%
查看執(zhí)行結(jié)果：
?
? ? ? 記得在上一節(jié)中說(shuō)過(guò)%TEMP%這個(gè)變量是從環(huán)境變量中讀取的，所以也可以去環(huán)境變量中查看是不是有此值，來(lái)確定TEMP變量是不是存在，一問(wèn)在startup.bat和catalina.bat并沒(méi)有設(shè)置TEMP變量。查看環(huán)境變量：
? ? ?因?yàn)門EMP存在，所以程序還需要順序執(zhí)行到90行，第90行的內(nèi)容如下：? ?
if
exist
"%TEMP%\%~nx0.run"
goto
mainEntry
這句話至少看起來(lái)有點(diǎn)蒙圈，尤其是\%~nx0.run這個(gè)東西，反正我第一次看見的時(shí)候我就想問(wèn)問(wèn)，這是毛啊，~nx0,下面看一下網(wǎng)上對(duì)于%~nx0的解釋：
%~nx0 contains the name of the running batch file (without the
path
)
意思就是代表執(zhí)行命令的文件的名字，我們來(lái)用實(shí)驗(yàn)證明一下，同樣還是修改那個(gè)test.bat文件吧。;-)
@echo
off
echo
"%TEMP%\%~nx0.run"
如果按照上面的解釋，那么輸出的信息應(yīng)該是C:\Users\Think\AppData\Local\Temp\test.bat.run，下面看一下運(yùn)行結(jié)果：
咦事實(shí)證明說(shuō)法正確，但是這個(gè)文件是不是存在呢，我們?nèi)EMP目錄下看一下,遺憾的是在C:\Users\Think\AppData\Local\Temp目錄沒(méi)有找到這個(gè)文件，所以還得順序執(zhí)行到第91行，91行的內(nèi)容是：
echo
Y>"%TEMP%\%~nx0.run"
這個(gè)看起來(lái)很簡(jiǎn)單，既然不存在這個(gè)文件，那么我就自己創(chuàng)建一個(gè)，同時(shí)寫入Y。也許你不信，所以我還是拿出個(gè)例子吧，還是test.bat呦：
@echo
off
echo
Y>"%TEMP%\%~nx0.run"
在C:\Users\Think\AppData\Local\Temp目錄下生成了test.bat.run文件，文件的內(nèi)容果然為Y。至于生成的文件有何意義，以后再說(shuō)。到現(xiàn)在位置我突然感慨，我很喜歡TOMCAT，它做了什么我都能知道，在接下來(lái)的一段時(shí)間內(nèi)，我想把我看TOMCAT源代碼的感受也下下來(lái)。也跟大家討論一下TOMCAT的工作原理。有點(diǎn)遠(yuǎn)，扯回來(lái)，下面看一下92行的內(nèi)容：
if
not
exist
"%TEMP%\%~nx0.run"
goto
mainEntry
這個(gè)一眼就看明白了，再次判斷%~nx0.run文件是否存在，如果還是不存在，那么直接到mainEntry節(jié)點(diǎn)，由于我們此時(shí)此文件已經(jīng)創(chuàng)建成功，那么順序執(zhí)行到第93行。
93行的內(nèi)容為：
echo
Y>"%TEMP%\%~nx0.Y"
這個(gè)同91行命令，不再?gòu)?qiáng)調(diào)。順序執(zhí)行到92行。
92行的內(nèi)容為：
call
"%~f0" %* <"%TEMP%\%~nx0.Y"
看到之后感覺依然是蒙圈，這里面有兩個(gè)點(diǎn)需要大家掌握：%~f0, %* 知道這兩組符號(hào)是什么意思，就解決了。
%~f0:表示運(yùn)行的文件的全路徑，假如我在test.bat中如此寫：
@echo
off
@echo
%%~f0 is %~f0
那么執(zhí)行結(jié)果為：
? ? ?OK。
%*：在batch file中，每一個(gè)命令的參數(shù)都以%1，%2，%3 .....的形式展現(xiàn)，我們也可以使用%來(lái)代替所有的參數(shù)，下面看修改萬(wàn)能測(cè)試文件test.bat中的內(nèi)容如下：
@echo
off
echo
First argument: [
%1
]
echo
Second argument: [
%2
]
echo
Third argument: [
%3
]
echo
Fourth argument: [
%4
]
echo
Fifth argument: [
%4
]
echo
Entire
command
line: [%*]
查看運(yùn)行結(jié)果：
意思就是將在catalina.bat文件中自己調(diào)用自己，傳遞參數(shù)Y，下面看一下測(cè)試，將test.bat中的內(nèi)容改為：
@echo
off
call
"%~f0" %* <"%TEMP%\%~nx0.Y"
查看運(yùn)行結(jié)果，在程序運(yùn)行了一段時(shí)間以后，得出如下結(jié)論：
很奇怪，奇怪亮點(diǎn)，為什么運(yùn)行的時(shí)候會(huì)有停頓，第二，為什么會(huì)產(chǎn)生這個(gè)結(jié)果。下面解決這兩個(gè)困惑，我覺得程序在運(yùn)行的時(shí)候肯定是在后臺(tái)運(yùn)行什么操作了，所以我將test.bat中的內(nèi)容改了一下： ?
call
"%~f0" %* <"%TEMP%\%~nx0.Y"
然后再次運(yùn)行，得到結(jié)果：
原來(lái)程序在輸出最終結(jié)果之前一直到在調(diào)用自己，所以會(huì)有一個(gè)停頓的感覺。
第二：為什么會(huì)產(chǎn)生這個(gè)結(jié)果：
下面看第96行的內(nèi)容：
set
RETVAL=%
ERRORLEVEL
%
在前面的的內(nèi)容中可能給大家一種誤解，所以在看到這句話的時(shí)候，不知道是不是也有人跟我似的直接去環(huán)境變量中找ERRORLEVEL的值，找不到之后覺得我在忽悠大家，下面我跟大家說(shuō)說(shuō)這個(gè)ERRORLEVEL。不知道大家是不是了解在Linux中的$?這個(gè)結(jié)果返回值，其實(shí)ERRORLEVEL和$?差不多，都是用來(lái)表示上次執(zhí)行結(jié)果的，如果返回0說(shuō)明執(zhí)行正確，如果不是0說(shuō)明執(zhí)行失敗。例如在test.bat中的內(nèi)容：
call
%
ERRORLEVEL
%
執(zhí)行結(jié)果：
下面看97行的內(nèi)容：
del
/Q "%TEMP%\%~nx0.Y" >NUL 2>&1
這里面有/Q， >NUL， 2>&1需要跟大家解釋一下：
/Q: 跟在del后面表示不需要交互式的刪除。安靜模式的意思。如在test.bat中的內(nèi)容如下：
del
/Q "%TEMP%\%~nx0.Y" >NUL 2>&1
然后運(yùn)行結(jié)果為：
此時(shí)文件系統(tǒng)中的文件確實(shí)已經(jīng)被刪除，只是在刪除的過(guò)程中沒(méi)有顯示刪除的過(guò)程，下面我們重新創(chuàng)建此文件，然后把/Q標(biāo)記去掉以后在嘗試一次：
>NUL 就是將輸出輸出到NUL中，這樣有錯(cuò)誤的情況下你什么都拿不到。
2>&1:2是值錯(cuò)誤輸出，&1是標(biāo)準(zhǔn)輸出，意思就是將錯(cuò)誤輸出重定向到標(biāo)準(zhǔn)輸出中
?>NUL 2>&1的意思就是將錯(cuò)誤輸出重定向到標(biāo)準(zhǔn)輸出，最后在重定向到NUL中，這樣出現(xiàn)錯(cuò)誤，你從表面上不會(huì)看出來(lái)。如果將test.bat中的刪除操作執(zhí)行多次，
@echo
off
del
/Q "%TEMP%\%~nx0.Y" >NUL 2>&1
看結(jié)果：
也不會(huì)顯示異常，如果將>NUL 2>&1刪除以后，再次執(zhí)行：
@echo
off
del
/Q "%TEMP%\%~nx0.Y"
結(jié)果就會(huì)顯示出異常：
下面看第98行的內(nèi)容：
exit
/B %RETVAL%
? 下面的mainEntry和gotHome節(jié)點(diǎn)的信息同前一節(jié)剛開始的內(nèi)容一樣，所有就不再說(shuō)明，如果對(duì)此有什么疑問(wèn)，請(qǐng)查看 查看tomcat啟動(dòng)文件都干點(diǎn)啥 一節(jié)。在接下來(lái)的部分中我想把115-137行的內(nèi)容放在一起說(shuō)明，因?yàn)樗麄兎譃閮刹糠郑謩e引入setenv.bat和setclasspath.bat并執(zhí)行，
:okHome
rem
Ensure that any user defined CLASSPATH variables are not used on startup,
rem
but allow them to be specified in setenv.bat, in rare case when it is needed.
set
CLASSPATH=
rem
Get standard environment variables
if
"%CATALINA_BASE%" == ""
goto
gotSetenvHome
if
exist
"%CATALINA_BASE%\bin\setenv.bat"
call
"%CATALINA_BASE%\bin\setenv.bat"
goto
gotSetenvBase
:gotSetenvHome
if
exist
"%CATALINA_HOME%\bin\setenv.bat"
call
"%CATALINA_HOME%\bin\setenv.bat"
:gotSetenvBase
rem
Get standard Java environment variables
if
exist
"%CATALINA_HOME%\bin\setclasspath.bat"
goto
okSetclasspath
echo
Cannot
find
"%CATALINA_HOME%\bin\setclasspath.bat"
echo
This file is needed to
run
this program
goto
end
:okSetclasspath
set
"BASEDIR=%CATALINA_HOME%"
call
"%CATALINA_HOME%\bin\setclasspath.bat"
%1
if
errorlevel
1
goto
end
這部分的操作就是設(shè)置環(huán)境變量，由于在tomcat7.0.8版本中不存在setenv.bat所以就不說(shuō)了，setclasspath.bat這個(gè)腳本很重要，瀏覽一下其中的內(nèi)容：
@echo
off
rem
Licensed to the Apache Software Foundation (ASF) under one or more
rem
contributor license agreements. See the NOTICE file distributed with
rem
this work for additional information regarding copyright ownership.
rem
The ASF licenses this file to You under the Apache License, Version 2.0
rem
(the "License"); you may not use this file except in compliance with
rem
the License. You may obtain a copy of the License at
rem
rem
http://www.apache.org/licenses/LICENSE-2.0
rem
rem
Unless required by applicable law or agreed to in writing, software
rem
distributed under the License is distributed on an "AS IS" BASIS,
rem
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rem
See the License for the specific language governing permissions and
rem
limitations under the License.
rem
---------------------------------------------------------------------------
rem
Set JAVA_HOME or JRE_HOME if not already set, ensure any provided settings
rem
are valid and consistent with the selected start-up options and set up the
rem
endorsed directory.
rem
rem
$Id: setclasspath.bat 964208 2010-07-14 21:24:45Z markt $
rem
---------------------------------------------------------------------------
rem
Make sure prerequisite environment variables are set
if
not
"%JAVA_HOME%" == ""
goto
gotJdkHome
if
not
"%JRE_HOME%" == ""
goto
gotJreHome
echo
Neither the JAVA_HOME nor the JRE_HOME environment variable is defined
echo
At least one of these environment variable is needed to
run
this program
goto
exit
:gotJreHome
if
not
exist
"%JRE_HOME%\bin\java.exe"
goto
noJavaHome
if
not
exist
"%JRE_HOME%\bin\javaw.exe"
goto
noJavaHome
if
not
""
%1
"" == ""
debug
""
goto
okJavaHome
echo
JAVA_HOME should point to a JDK in order to
run
in
debug
mode
.
goto
exit
:gotJdkHome
if
not
exist
"%JAVA_HOME%\bin\java.exe"
goto
noJavaHome
if
not
exist
"%JAVA_HOME%\bin\javaw.exe"
goto
noJavaHome
if
not
exist
"%JAVA_HOME%\bin\jdb.exe"
goto
noJavaHome
if
not
exist
"%JAVA_HOME%\bin\javac.exe"
goto
noJavaHome
if
not
"%JRE_HOME%" == ""
goto
okJavaHome
set
"JRE_HOME=%JAVA_HOME%"
goto
okJavaHome
:noJavaHome
echo
The JAVA_HOME environment variable is
not
defined correctly
echo
This environment variable is needed to
run
this program
echo
NB: JAVA_HOME should point to a JDK
not
a JRE
goto
exit
:okJavaHome
if
not
"%BASEDIR%" == ""
goto
gotBasedir
echo
The BASEDIR environment variable is
not
defined
echo
This environment variable is needed to
run
this program
goto
exit
:gotBasedir
if
exist
"%BASEDIR%\bin\setclasspath.bat"
goto
okBasedir
echo
The BASEDIR environment variable is
not
defined correctly
echo
This environment variable is needed to
run
this program
goto
exit
:okBasedir
rem
Don't override the endorsed dir if the user has set it previously
if
not
"%JAVA_ENDORSED_DIRS%" == ""
goto
gotEndorseddir
rem
Set the default -Djava.endorsed.dirs argument
set
"JAVA_ENDORSED_DIRS=%BASEDIR%\endorsed"
:gotEndorseddir
rem
Set standard command for invoking Java.
rem
Note that NT requires a window name argument when using start.
rem
Also note the quoting as JAVA_HOME may contain spaces.
set
_RUNJAVA="%JRE_HOME%\bin\java"
set
_RUNJDB="%JAVA_HOME%\bin\jdb"
goto
end
:exit
exit
/b 1
:end
exit
/b 0
其中就是關(guān)于JAVA環(huán)境的一些校驗(yàn)和變量的設(shè)置，重要性不言而喻，所以如果執(zhí)行本步操作失敗的情況下，程序?qū)⑼顺鰣?zhí)行。
接下來(lái)是設(shè)置CLASSPATH的內(nèi)容，看過(guò)前面的說(shuō)明以后，對(duì)于下面的內(nèi)容應(yīng)該很容易就能看懂：
rem
Add on extra jar file to CLASSPATH
rem
Note that there are no quotes as we do not want to introduce random
rem
quotes into the CLASSPATH
if
"%CLASSPATH%" == ""
goto
emptyClasspath
set
"CLASSPATH=%CLASSPATH%;"
:emptyClasspath
set
"CLASSPATH=%CLASSPATH%%CATALINA_HOME%\bin\bootstrap.jar"
if
not
"%CATALINA_BASE%" == ""
goto
gotBase
set
"CATALINA_BASE=%CATALINA_HOME%"
:gotBase
if
not
"%CATALINA_TMPDIR%" == ""
goto
gotTmpdir
set
"CATALINA_TMPDIR=%CATALINA_BASE%\temp"
:gotTmpdir
rem
Add tomcat-juli.jar to classpath
rem
tomcat-juli.jar can be over-ridden per instance
if
not
exist
"%CATALINA_BASE%\bin\tomcat-juli.jar"
goto
juliClasspathHome
set
"CLASSPATH=%CLASSPATH%;%CATALINA_BASE%\bin\tomcat-juli.jar"
goto
juliClasspathDone
:juliClasspathHome
set
"CLASSPATH=%CLASSPATH%;%CATALINA_HOME%\bin\tomcat-juli.jar"
:juliClasspathDone
將tomcat-juli.jar和bootstrap.jar的全路徑追加到CLASSPATH中，究竟這兩個(gè)jar包是做什么的，不是本文的范疇，只說(shuō)明這兩個(gè)jar包需要在CLASSPATH中體現(xiàn)。
接下來(lái)是關(guān)于Log選項(xiàng)的問(wèn)題：
if
not
"%LOGGING_CONFIG%" == ""
goto
noJuliConfig
set
LOGGING_CONFIG=
-Dnop
if
not
exist
"%CATALINA_BASE%\conf\logging.properties"
goto
noJuliConfig
set
LOGGING_CONFIG=-Djava.util.logging.config.file="%CATALINA_BASE%\conf\logging.properties"
:noJuliConfig
set
JAVA_OPTS=
%JAVA_OPTS% %LOGGING_CONFIG%
if
not
"%LOGGING_MANAGER%" == ""
goto
noJuliManager
set
LOGGING_MANAGER=-Djava.util.logging.manager=org.apache.juli.
ClassLoaderLogManager
:noJuliManager
set
JAVA_OPTS=%JAVA_OPTS% %LOGGING_MANAGER%
內(nèi)容很簡(jiǎn)單，一看就明白，所以也不多說(shuō)了。
在前面準(zhǔn)備了這么久，接下來(lái)終于到執(zhí)行的時(shí)候了。下面看一下這段腳本：
rem
----- Execute The Requested Command ---------------------------------------
echo
Using CATALINA_BASE: "%CATALINA_BASE%"
echo
Using CATALINA_HOME: "%CATALINA_HOME%"
echo
Using CATALINA_TMPDIR: "%CATALINA_TMPDIR%"
if
""
%1
"" == ""
debug
""
goto
use_jdk
echo
Using JRE_HOME: "%JRE_HOME%"
goto
java_dir_displayed
:use_jdk
echo
Using JAVA_HOME: "%JAVA_HOME%"
:java_dir_displayed
echo
Using CLASSPATH: "%CLASSPATH%"
set
_EXECJAVA=
%_RUNJAVA%
set
MAINCLASS=org.apache.catalina.startup.
Bootstrap
set
ACTION=
start
set
SECURITY_POLICY_FILE=
set
DEBUG_OPTS=
set
JPDA=
if
not
""
%1
"" == ""jpda""
goto
noJpda
set
JPDA=
jpda
if
not
"%JPDA_TRANSPORT%" == ""
goto
gotJpdaTransport
set
JPDA_TRANSPORT=
dt_socket
:gotJpdaTransport
if
not
"%JPDA_ADDRESS%" == ""
goto
gotJpdaAddress
set
JPDA_ADDRESS=8000
:gotJpdaAddress
if
not
"%JPDA_SUSPEND%" == ""
goto
gotJpdaSuspend
set
JPDA_SUSPEND=
n
:gotJpdaSuspend
if
not
"%JPDA_OPTS%" == ""
goto
gotJpdaOpts
set
JPDA_OPTS=-agentlib
:jdwp
=transport=%JPDA_TRANSPORT%,address=%JPDA_ADDRESS%,server=y,suspend=
%JPDA_SUSPEND%
:gotJpdaOpts
shift
:noJpda
if
""
%1
"" == ""
debug
""
goto
doDebug
if
""
%1
"" == ""
run
""
goto
doRun
if
""
%1
"" == ""
start
""
goto
doStart
if
""
%1
"" == ""stop""
goto
doStop
if
""
%1
"" == ""version""
goto
doVersion
echo
Usage: catalina ( commands ... )
echo
commands:
echo
debug
Start
Catalina in a debugger
echo
debug
-security
Debug
Catalina with a security manager
echo
jpda
start
Start
Catalina under JPDA debugger
echo
run
Start
Catalina in the current window
echo
run
-security
Start
in the current window with security manager
echo
start
Start
Catalina in a separate window
echo
start
-security
Start
in a separate window with security manager
echo
stop Stop Catalina
echo
version What version of tomcat are you running?
goto
end
:doDebug
shift
set
_EXECJAVA=
%_RUNJDB%
set
DEBUG_OPTS=-sourcepath "%CATALINA_HOME%\..\..\java"
if
not
""
%1
"" == ""-security""
goto
execCmd
shift
echo
Using Security Manager
set
"SECURITY_POLICY_FILE=%CATALINA_BASE%\conf\catalina.policy"
goto
execCmd
:doRun
shift
if
not
""
%1
"" == ""-security""
goto
execCmd
shift
echo
Using Security Manager
set
"SECURITY_POLICY_FILE=%CATALINA_BASE%\conf\catalina.policy"
goto
execCmd
:doStart
shift
if
not
"%OS%" == "Windows_NT"
goto
noTitle
if
"%TITLE%" == ""
set
TITLE=
Tomcat
set
_EXECJAVA=
start
"%TITLE%"
%_RUNJAVA%
goto
gotTitle
:noTitle
set
_EXECJAVA=
start
%_RUNJAVA%
:gotTitle
if
not
""
%1
"" == ""-security""
goto
execCmd
shift
echo
Using Security Manager
set
"SECURITY_POLICY_FILE=%CATALINA_BASE%\conf\catalina.policy"
goto
execCmd
:doStop
shift
set
ACTION=
stop
set
CATALINA_OPTS=
goto
execCmd
:doVersion
%_EXECJAVA% -classpath
"%CATALINA_HOME%\lib\catalina.jar" org.apache.catalina.util.
ServerInfo
goto
end
:execCmd
rem
Get remaining unshifted command line arguments and save them in the
set
CMD_LINE_ARGS=
:setArgs
if
""
%1
""==""""
goto
doneSetArgs
set
CMD_LINE_ARGS=%CMD_LINE_ARGS%
%1
shift
goto
setArgs
:doneSetArgs
rem
Execute Java with the applicable properties
if
not
"%JPDA%" == ""
goto
doJpda
if
not
"%SECURITY_POLICY_FILE%" == ""
goto
doSecurity
%_EXECJAVA% %JAVA_OPTS% %CATALINA_OPTS% %DEBUG_OPTS% -Djava
.endorsed.dirs="%JAVA_ENDORSED_DIRS%" -classpath "%CLASSPATH%" -Dcatalina.base="%CATALINA_BASE%" -Dcatalina.home="%CATALINA_HOME%" -Djava.io.tmpdir="%CATALINA_TMPDIR%"
%MAINCLASS% %CMD_LINE_ARGS% %ACTION%
goto
end
:doSecurity
%_EXECJAVA% %JAVA_OPTS% %CATALINA_OPTS% %DEBUG_OPTS% -Djava
.endorsed.dirs="%JAVA_ENDORSED_DIRS%" -classpath "%CLASSPATH%" -Djava.security.manager -Djava.security.policy=="%SECURITY_POLICY_FILE%" -Dcatalina.base="%CATALINA_BASE%" -Dcatalina.home="%CATALINA_HOME%" -Djava.io.tmpdir="%CATALINA_TMPDIR%"
%MAINCLASS% %CMD_LINE_ARGS% %ACTION%
goto
end
:doJpda
if
not
"%SECURITY_POLICY_FILE%" == ""
goto
doSecurityJpda
%_EXECJAVA% %JAVA_OPTS% %CATALINA_OPTS% %JPDA_OPTS% %DEBUG_OPTS% -Djava
.endorsed.dirs="%JAVA_ENDORSED_DIRS%" -classpath "%CLASSPATH%" -Dcatalina.base="%CATALINA_BASE%" -Dcatalina.home="%CATALINA_HOME%" -Djava.io.tmpdir="%CATALINA_TMPDIR%"
%MAINCLASS% %CMD_LINE_ARGS% %ACTION%
goto
end
:doSecurityJpda
%_EXECJAVA% %JAVA_OPTS% %CATALINA_OPTS% %JPDA_OPTS% %DEBUG_OPTS% -Djava
.endorsed.dirs="%JAVA_ENDORSED_DIRS%" -classpath "%CLASSPATH%" -Djava.security.manager -Djava.security.policy=="%SECURITY_POLICY_FILE%" -Dcatalina.base="%CATALINA_BASE%" -Dcatalina.home="%CATALINA_HOME%" -Djava.io.tmpdir="%CATALINA_TMPDIR%"
%MAINCLASS% %CMD_LINE_ARGS% %ACTION%
goto
end
:end
前三行的內(nèi)容是將當(dāng)前設(shè)置的變量進(jìn)行輸出，
echo
Using CATALINA_BASE: "%CATALINA_BASE%"
echo
Using CATALINA_HOME: "%CATALINA_HOME%"
echo
Using CATALINA_TMPDIR: "%CATALINA_TMPDIR%"
CATALINA_BASE，CATALINA_HOME，CATALINA_TMPDIR這三個(gè)變量在startup.bat或者catalina.bat中已經(jīng)提前設(shè)置了，射出只是為了提示用戶當(dāng)前的運(yùn)行環(huán)境，接下來(lái)看181-187行的內(nèi)容：
if
""
%1
"" == ""
debug
""
goto
use_jdk
echo
Using JRE_HOME: "%JRE_HOME%"
goto
java_dir_displayed
:use_jdk
echo
Using JAVA_HOME: "%JAVA_HOME%"
:java_dir_displayed
echo
Using CLASSPATH: "%CLASSPATH%"
在解釋這段內(nèi)容之前，我建議大家要對(duì)setclasspath.bat中的內(nèi)容有所了解，因?yàn)閟etclasspath.bat中包含對(duì)與JRE_HOME,JAVA_HOME變量的邏輯處理和定義。這段內(nèi)容的意思就是說(shuō)如果catalina.bat接收到的第一個(gè)參數(shù)是debug,那么就到use_jdk節(jié)點(diǎn)，由于一般情況下我們是用startup.bat腳本調(diào)用catalina.bat腳本，所以第一個(gè)參數(shù)應(yīng)該是start,所以應(yīng)該順序執(zhí)行到182行 echo Using JRE_HOME: "%JRE_HOME%"，然后執(zhí)行到j(luò)ava_dir_displayed節(jié)點(diǎn)，至于為什么 debug的時(shí)候不使用JRE_HOME這個(gè)變量 ，我們先記下，在以后的章節(jié)中在討論。
在189-194行中是設(shè)置一些變量，內(nèi)容如下：
set
_EXECJAVA=
%_RUNJAVA%
set
MAINCLASS=org.apache.catalina.startup.
Bootstrap
set
ACTION=
start
set
SECURITY_POLICY_FILE=
set
DEBUG_OPTS=
set
JPDA=
這里面要說(shuō)兩點(diǎn)，%_RUNJAVA%變量和org.apache.catalina.startup.Bootstrap，其中%_RUNJAVA%是在setclasspath.bat文件中定義的，其值為"%JRE_HOME%\bin\java"，
MAINCLASS寫過(guò)JAVA程序的人應(yīng)該都知道是做什么用的，關(guān)鍵是org.apache.catalina.startup.Bootstrap這個(gè)值是怎么來(lái)的，在哪里定義的，記得在catalina.bat中有過(guò)這么一個(gè)設(shè)置：CLASSPATH=%CLASSPATH%%CATALINA_HOME%\bin\bootstrap.jar，其中org.apache.catalina.startup.Bootstrap就是該jar包中的一個(gè)類。具體內(nèi)容以及意義不再此展開。
第196行-211行是對(duì)jpda（）的處理，因?yàn)樵蹅儧](méi)有涉及，關(guān)于jdpa的內(nèi)容不在此展開，因?yàn)槲覀儾簧婕八蕴^(guò)此步驟：
if
not
""
%1
"" == ""jpda""
goto
noJpda
set
JPDA=
jpda
if
not
"%JPDA_TRANSPORT%" == ""
goto
gotJpdaTransport
set
JPDA_TRANSPORT=
dt_socket
:gotJpdaTransport
if
not
"%JPDA_ADDRESS%" == ""
goto
gotJpdaAddress
set
JPDA_ADDRESS=8000
:gotJpdaAddress
if
not
"%JPDA_SUSPEND%" == ""
goto
gotJpdaSuspend
set
JPDA_SUSPEND=
n
:gotJpdaSuspend
if
not
"%JPDA_OPTS%" == ""
goto
gotJpdaOpts
set
JPDA_OPTS=-agentlib
:jdwp
=transport=%JPDA_TRANSPORT%,address=%JPDA_ADDRESS%,server=y,suspend=
%JPDA_SUSPEND%
:gotJpdaOpts
shift
:noJpda
再次記下一個(gè)知識(shí)點(diǎn)JDPA。
下面到noJpda節(jié)點(diǎn)，內(nèi)容如下：
if
""
%1
"" == ""
debug
""
goto
doDebug
if
""
%1
"" == ""
run
""
goto
doRun
if
""
%1
"" == ""
start
""
goto
doStart
if
""
%1
"" == ""stop""
goto
doStop
if
""
%1
"" == ""version""
goto
doVersion
echo
Usage: catalina ( commands ... )
echo
commands:
echo
debug
Start
Catalina in a debugger
echo
debug
-security
Debug
Catalina with a security manager
echo
jpda
start
Start
Catalina under JPDA debugger
echo
run
Start
Catalina in the current window
echo
run
-security
Start
in the current window with security manager
echo
start
Start
Catalina in a separate window
echo
start
-security
Start
in a separate window with security manager
echo
stop Stop Catalina
echo
version What version of tomcat are you running?
goto
end
其中
if
""
%1
"" == ""
debug
""
goto
doDebug
if
""
%1
"" == ""
run
""
goto
doRun
if
""
%1
"" == ""
start
""
goto
doStart
if
""
%1
"" == ""stop""
goto
doStop
if
""
%1
"" == ""version""
goto
doVersion
是根據(jù)用戶輸入的具體命令，跳轉(zhuǎn)到具體的處理節(jié)點(diǎn)，例如輸入的命令，那么就到doStart節(jié)點(diǎn)，219行-230行的內(nèi)容是，如果你輸入的第一個(gè)參數(shù)不再預(yù)設(shè)的命令當(dāng)中，給你的提示：
echo
Usage: catalina ( commands ... )
echo
commands:
echo
debug
Start
Catalina in a debugger
echo
debug
-security
Debug
Catalina with a security manager
echo
jpda
start
Start
Catalina under JPDA debugger
echo
run
Start
Catalina in the current window
echo
run
-security
Start
in the current window with security manager
echo
start
Start
Catalina in a separate window
echo
start
-security
Start
in a separate window with security manager
echo
stop Stop Catalina
echo
version What version of tomcat are you running?
goto
end
下面先看232行-240行的doDebug節(jié)點(diǎn)的內(nèi)容：
:doDebug
shift
set
_EXECJAVA=
%_RUNJDB%
set
DEBUG_OPTS=-sourcepath "%CATALINA_HOME%\..\..\java"
if
not
""
%1
"" == ""-security""
goto
execCmd
shift
echo
Using Security Manager
set
"SECURITY_POLICY_FILE=%CATALINA_BASE%\conf\catalina.policy"
goto
execCmd
同樣%_RUNJDB%變量去setclasspath.bat文件中找定義，235行的內(nèi)容配置DEBUG_OPTS，接下來(lái)是安全策略的問(wèn)題，如果指定參數(shù)"-security"，那么就需要加載安全策略文件，安全策略文件為%CATALINA_BASE%\conf\catalina.policy，內(nèi)容如下：
// Licensed to the Apache Software Foundation (ASF)
under one or more
// contributor license agreements.
See the NOTICE file distributed with
// this work
for
additional information regarding copyright ownership.
// The ASF licenses this file to You under the Apache License, Version 2.0
// (the "License"); you may
not
use
this file except in compliance with
// the License. You may obtain a
copy
of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
software
// distributed under the License is distributed
on
an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License
for
the specific language governing permissions and
// limitations under the License.
// ============================================================================
// catalina.policy - Security Policy Permissions
for
Tomcat 7
//
// This file contains a default
set
of security policies to be enforced (
by the
// JVM)
when
Catalina is executed with the "-security" option.
In addition
// to the permissions granted here,
the following additional permissions are
//
granted specific to each web application:
//
//
* Read access to its document root directory
// * Read,
write and delete access to its working directory
//
// $Id: catalina.policy 981453 2010-08-02 11:00:51Z markt $
// ============================================================================
// ========== SYSTEM CODE PERMISSIONS =========================================
//
These permissions apply to javac
grant codeBase
"file:${java.home}/lib/-"
{
permission java
.security.AllPermission;
}
;
//
These permissions apply to all shared system extensions
grant codeBase
"file:${java.home}/jre/lib/ext/-"
{
permission java
.security.AllPermission;
}
;
// These permissions apply to javac
when
${java.home] points at $JAVA_HOME/
jre
grant codeBase
"file:${java.home}/../lib/-"
{
permission java
.security.AllPermission;
}
;
// These permissions apply to all shared system extensions
when
// ${java.home} points at $JAVA_HOME/
jre
grant codeBase
"file:${java.home}/lib/ext/-"
{
permission java
.security.AllPermission;
}
;
// ========== CATALINA CODE PERMISSIONS =======================================
//
These permissions apply to the daemon code
grant codeBase
"file:${catalina.home}/bin/commons-daemon.jar"
{
permission java
.security.AllPermission;
}
;
//
These permissions apply to the logging API
// Note:
If
tomcat-juli.jar is in ${catalina.base} and
not
in ${catalina.home},
// update this section accordingly.
// grant codeBase "file:${catalina.base}/bin/tomcat-juli.jar" {..
}
grant codeBase
"file:${catalina.home}/bin/tomcat-juli.jar"
{
permission java
.io.
FilePermission
"${java.home}${file.separator}lib${file.separator}logging.properties", "read";
permission java
.io.
FilePermission
"${catalina.base}${file.separator}conf${file.separator}logging.properties", "read";
permission java
.io.
FilePermission
"${catalina.base}${file.separator}logs", "read, write";
permission java
.io.
FilePermission
"${catalina.base}${file.separator}logs${file.separator}*", "read, write";
permission java
.lang.RuntimePermission "shutdownHooks";
permission java
.lang.RuntimePermission "getClassLoader";
permission java
.lang.RuntimePermission "setContextClassLoader";
permission java
.util.logging.LoggingPermission "control";
permission java
.util.PropertyPermission "java.util.logging.config.class", "read";
permission java
.util.PropertyPermission "java.util.logging.config.file", "read";
permission java
.util.PropertyPermission "catalina.base", "read";
// Note: To enable per context logging configuration,
permit read access to
// the appropriate file.
Be sure that the logging configuration is
// secure before enabling such access.
// E.g.
for
the examples web application:
// permission java.io.FilePermission "
${catalina.base}${file.separator}
// webapps${file.separator}examples${file.separator}WEB-INF
// ${file.separator}classes${file.separator}logging.properties
", "read";
}
;
//
These permissions apply to the server startup code
grant codeBase
"file:${catalina.home}/bin/bootstrap.jar"
{
permission java
.security.AllPermission;
}
;
//
These permissions apply to the servlet API classes
//
and those that are shared across all class loaders
// located in the "lib"
directory
grant codeBase
"file:${catalina.home}/lib/-"
{
permission java
.security.AllPermission;
}
;
//
If
using a per instance lib directory, i.e. ${catalina.base}/lib,
//
then
the following permission will need to be uncommented
// grant codeBase "file:${catalina.base}/lib/-"
{
// permission java.security.AllPermission;
// };
// ========== WEB APPLICATION PERMISSIONS =====================================
//
These permissions are granted by default to all web applications
// In addition,
a web application will be given a read FilePermission
// and JndiPermission
for
all
files
and directories in its document root.
grant {
// Required
for
JNDI lookup of named JDBC DataSource's and
//
javamail named MimePart DataSource used to send mail
permission java
.util.PropertyPermission "java.home", "read";
permission java
.util.PropertyPermission "java.naming.*", "read";
permission java
.util.PropertyPermission "javax.sql.*", "read";
//
OS Specific properties to allow read access
permission java
.util.PropertyPermission "os.name", "read";
permission java
.util.PropertyPermission "os.version", "read";
permission java
.util.PropertyPermission "os.arch", "read";
permission java
.util.PropertyPermission "file.separator", "read";
permission java
.util.PropertyPermission "path.separator", "read";
permission java
.util.PropertyPermission "line.separator", "read";
//
JVM properties to allow read access
permission java
.util.PropertyPermission "java.version", "read";
permission java
.util.PropertyPermission "java.vendor", "read";
permission java
.util.PropertyPermission "java.vendor.url", "read";
permission java
.util.PropertyPermission "java.class.version", "read";
permission java
.util.PropertyPermission "java.specification.version", "read";
permission java
.util.PropertyPermission "java.specification.vendor", "read";
permission java
.util.PropertyPermission "java.specification.name", "read";
permission java
.util.PropertyPermission "java.vm.specification.version", "read";
permission java
.util.PropertyPermission "java.vm.specification.vendor", "read";
permission java
.util.PropertyPermission "java.vm.specification.name", "read";
permission java
.util.PropertyPermission "java.vm.version", "read";
permission java
.util.PropertyPermission "java.vm.vendor", "read";
permission java
.util.PropertyPermission "java.vm.name", "read";
// Required
for
OpenJMX
permission java
.lang.RuntimePermission "getAttribute";
// Allow read of JAXP compliant XML parser
debug
permission java
.util.PropertyPermission "jaxp.debug", "read";
//
All JSPs need to be able to read this package
permission java
.lang.RuntimePermission "accessClassInPackage.org.apache.tomcat";
// Precompiled JSPs need access to these packages.
permission java
.lang.RuntimePermission "accessClassInPackage.org.apache.jasper.el";
permission java
.lang.RuntimePermission "accessClassInPackage.org.apache.jasper.runtime";
permission java
.lang.
RuntimePermission
"accessClassInPackage.org.apache.jasper.runtime.*";
// Precompiled JSPs need access to these system properties.
permission java
.util.
PropertyPermission
"org.apache.jasper.runtime.BodyContentImpl.LIMIT_BUFFER", "read";
permission java
.util.
PropertyPermission
"org.apache.el.parser.COERCE_TO_ZERO", "read";
// The cookie code needs these.
permission java
.util.
PropertyPermission
"org.apache.catalina.STRICT_SERVLET_COMPLIANCE", "read";
permission java
.util.
PropertyPermission
"org.apache.tomcat.util.http.ServerCookie.STRICT_NAMING", "read";
permission java
.util.
PropertyPermission
"org.apache.tomcat.util.http.ServerCookie.FWD_SLASH_IS_SEPARATOR", "read";
//
Applications using Comet need to be able to access this package
permission java
.lang.RuntimePermission "accessClassInPackage.org.apache.catalina.comet";
}
;
//
The Manager application needs access to the following packages to support the
//
session display functionality
grant codeBase
"file:${catalina.base}/webapps/manager/-"
{
permission java
.lang.RuntimePermission "accessClassInPackage.org.apache.catalina";
permission java
.lang.RuntimePermission "accessClassInPackage.org.apache.catalina.manager";
permission java
.lang.RuntimePermission "accessClassInPackage.org.apache.catalina.manager.util";
}
;
// You can
assign
additional permissions to particular web applications by
// adding additional "grant" entries here, based
on
the code base
for
that
// application, /WEB-INF/classes/, or /WEB-INF/lib/ jar
files
.
//
// Different permissions can be granted to JSP pages,
classes loaded from
// the /WEB-INF/classes/ directory, all jar
files
in the /WEB-INF/lib/
// directory, or even to individual jar
files
in the /WEB-INF/lib/ directory.
//
//
For
instance, assume that the standard "examples"
application
//
included a JDBC driver that needed to establish a network connection to the
//
corresponding database and used the scrape taglib to get the weather from
// the NOAA web server. You might create a "grant"
entries like this:
//
// The permissions granted to the context root directory apply to JSP pages.
// grant codeBase "file:${catalina.base}/webapps/examples/-"
{
// permission java.
net
.SocketPermission "dbhost.mycompany.com:5432", "connect";
// permission java.
net
.SocketPermission "*.noaa.gov:80", "connect";
// };
//
// The permissions granted to the context WEB-INF/
classes directory
// grant codeBase "file:${catalina.base}/webapps/examples/WEB-INF/classes/-"
{
// };
//
//
The permission granted to your JDBC driver
// grant codeBase "jar:file:${catalina.base}/webapps/examples/WEB-INF/lib/driver.jar!/-"
{
// permission java.
net
.SocketPermission "dbhost.mycompany.com:5432", "connect";
// };
//
The permission granted to the scrape taglib
// grant codeBase "jar:file:${catalina.base}/webapps/examples/WEB-INF/lib/scrape.jar!/-"
{
// permission java.
net
.SocketPermission "*.noaa.gov:80", "connect";
// };
里面涉及到一些權(quán)限的設(shè)置，有興趣大家可以仔細(xì)研究。最終執(zhí)行execCmd節(jié)點(diǎn)的腳本。
242行-248行doRun節(jié)點(diǎn)內(nèi)容如下：
:doRun
shift
if
not
""
%1
"" == ""-security""
goto
execCmd
shift
echo
Using Security Manager
set
"SECURITY_POLICY_FILE=%CATALINA_BASE%\conf\catalina.policy"
goto
execCmd
內(nèi)容同doDebug內(nèi)容相似，只是判斷是不是需要加載安全配置文件。
250行-263行的doStart節(jié)點(diǎn)：
:doStart
shift
if
not
"%OS%" == "Windows_NT"
goto
noTitle
if
"%TITLE%" == ""
set
TITLE=
Tomcat
set
_EXECJAVA=
start
"%TITLE%"
%_RUNJAVA%
goto
gotTitle
:noTitle
set
_EXECJAVA=
start
%_RUNJAVA%
:gotTitle
if
not
""
%1
"" == ""-security""
goto
execCmd
shift
echo
Using Security Manager
set
"SECURITY_POLICY_FILE=%CATALINA_BASE%\conf\catalina.policy"
goto
execCmd
主要內(nèi)容就是，如果%OS%環(huán)境變量不是Windows_NT,那么不設(shè)置標(biāo)題，直接判斷是否需要加載安全配置文件，如果%OS%環(huán)境變量的值為Windows_NT,那么設(shè)置Title變量，如果沒(méi)有指定Title變量，默認(rèn)值為Tomcat,設(shè)置完_EXECJAVA變量以后，執(zhí)行execCmd節(jié)點(diǎn)的腳本。
265行-269行的doStop節(jié)點(diǎn)，內(nèi)容比較簡(jiǎn)單，主要就是設(shè)置一下ACTION變量，內(nèi)容如下：
:doStop
shift
set
ACTION=
stop
set
CATALINA_OPTS=
goto
execCmd
271行-273行的doVersion節(jié)點(diǎn)，就是調(diào)用了一下"%CATALINA_HOME%\lib\catalina.jar"中的org.apache.catalina.util.ServerInfo方法，內(nèi)容如下：
:doVersion
%_EXECJAVA% -classpath
"%CATALINA_HOME%\lib\catalina.jar" org.apache.catalina.util.
ServerInfo
goto
end
下面真正的重點(diǎn)來(lái)了，execCmd節(jié)點(diǎn)，其中有和startup.bat中處理參與一樣功能的節(jié)點(diǎn)setArgs,從279行-283行，循環(huán)讀出參數(shù)中的內(nèi)容追加到CMD_LINE_ARGS變量中，內(nèi)容如下：
set
CMD_LINE_ARGS=
:setArgs
if
""
%1
""==""""
goto
doneSetArgs
set
CMD_LINE_ARGS=%CMD_LINE_ARGS%
%1
shift
goto
setArgs
286行-300行的內(nèi)容就是真正的執(zhí)行方法了，先看內(nèi)容：
rem
Execute Java with the applicable properties
if
not
"%JPDA%" == ""
goto
doJpda
if
not
"%SECURITY_POLICY_FILE%" == ""
goto
doSecurity
%_EXECJAVA% %JAVA_OPTS% %CATALINA_OPTS% %DEBUG_OPTS% -Djava
.endorsed.dirs="%JAVA_ENDORSED_DIRS%" -classpath "%CLASSPATH%" -Dcatalina.base="%CATALINA_BASE%" -Dcatalina.home="%CATALINA_HOME%" -Djava.io.tmpdir="%CATALINA_TMPDIR%"
%MAINCLASS% %CMD_LINE_ARGS% %ACTION%
goto
end
:doSecurity
%_EXECJAVA% %JAVA_OPTS% %CATALINA_OPTS% %DEBUG_OPTS% -Djava
.endorsed.dirs="%JAVA_ENDORSED_DIRS%" -classpath "%CLASSPATH%" -Djava.security.manager -Djava.security.policy=="%SECURITY_POLICY_FILE%" -Dcatalina.base="%CATALINA_BASE%" -Dcatalina.home="%CATALINA_HOME%" -Djava.io.tmpdir="%CATALINA_TMPDIR%"
%MAINCLASS% %CMD_LINE_ARGS% %ACTION%
goto
end
:doJpda
if
not
"%SECURITY_POLICY_FILE%" == ""
goto
doSecurityJpda
%_EXECJAVA% %JAVA_OPTS% %CATALINA_OPTS% %JPDA_OPTS% %DEBUG_OPTS% -Djava
.endorsed.dirs="%JAVA_ENDORSED_DIRS%" -classpath "%CLASSPATH%" -Dcatalina.base="%CATALINA_BASE%" -Dcatalina.home="%CATALINA_HOME%" -Djava.io.tmpdir="%CATALINA_TMPDIR%"
%MAINCLASS% %CMD_LINE_ARGS% %ACTION%
goto
end
:doSecurityJpda
%_EXECJAVA% %JAVA_OPTS% %CATALINA_OPTS% %JPDA_OPTS% %DEBUG_OPTS% -Djava
.endorsed.dirs="%JAVA_ENDORSED_DIRS%" -classpath "%CLASSPATH%" -Djava.security.manager -Djava.security.policy=="%SECURITY_POLICY_FILE%" -Dcatalina.base="%CATALINA_BASE%" -Dcatalina.home="%CATALINA_HOME%" -Djava.io.tmpdir="%CATALINA_TMPDIR%"
%MAINCLASS% %CMD_LINE_ARGS% %ACTION%
goto
end
是不是有點(diǎn)長(zhǎng)，是不是有點(diǎn)看不懂，是不是覺得很麻煩，不要著急，我想一個(gè)辦法，更直觀的觀察這里面究竟是什么東西：下面我在這些腳本上添點(diǎn)東西，弄成這個(gè)樣子：
rem
Execute Java with the applicable properties
if
not
"%JPDA%" == ""
goto
doJpda
if
not
"%SECURITY_POLICY_FILE%" == ""
goto
doSecurity
%_EXECJAVA% %JAVA_OPTS% %CATALINA_OPTS% %DEBUG_OPTS% -Djava
.endorsed.dirs="%JAVA_ENDORSED_DIRS%" -classpath "%CLASSPATH%" -Dcatalina.base="%CATALINA_BASE%" -Dcatalina.home="%CATALINA_HOME%" -Djava.io.tmpdir="%CATALINA_TMPDIR%"
%MAINCLASS% %CMD_LINE_ARGS% %ACTION%
echo
1 %_EXECJAVA% %JAVA_OPTS% %CATALINA_OPTS% %DEBUG_OPTS% -Djava.endorsed.dirs="%JAVA_ENDORSED_DIRS%" -classpath "%CLASSPATH%" -Dcatalina.base="%CATALINA_BASE%" -Dcatalina.home="%CATALINA_HOME%" -Djava.io.tmpdir="%CATALINA_TMPDIR%"
%MAINCLASS% %CMD_LINE_ARGS% %ACTION%
goto
end
:doSecurity
%_EXECJAVA% %JAVA_OPTS% %CATALINA_OPTS% %DEBUG_OPTS% -Djava
.endorsed.dirs="%JAVA_ENDORSED_DIRS%" -classpath "%CLASSPATH%" -Djava.security.manager -Djava.security.policy=="%SECURITY_POLICY_FILE%" -Dcatalina.base="%CATALINA_BASE%" -Dcatalina.home="%CATALINA_HOME%" -Djava.io.tmpdir="%CATALINA_TMPDIR%"
%MAINCLASS% %CMD_LINE_ARGS% %ACTION%
echo
2 %_EXECJAVA% %JAVA_OPTS% %CATALINA_OPTS% %DEBUG_OPTS% -Djava.endorsed.dirs="%JAVA_ENDORSED_DIRS%" -classpath "%CLASSPATH%" -Djava.security.manager -Djava.security.policy=="%SECURITY_POLICY_FILE%" -Dcatalina.base="%CATALINA_BASE%" -Dcatalina.home="%CATALINA_HOME%" -Djava.io.tmpdir="%CATALINA_TMPDIR%"
%MAINCLASS% %CMD_LINE_ARGS% %ACTION%
goto
end
:doJpda
if
not
"%SECURITY_POLICY_FILE%" == ""
goto
doSecurityJpda
%_EXECJAVA% %JAVA_OPTS% %CATALINA_OPTS% %JPDA_OPTS% %DEBUG_OPTS% -Djava
.endorsed.dirs="%JAVA_ENDORSED_DIRS%" -classpath "%CLASSPATH%" -Dcatalina.base="%CATALINA_BASE%" -Dcatalina.home="%CATALINA_HOME%" -Djava.io.tmpdir="%CATALINA_TMPDIR%"
%MAINCLASS% %CMD_LINE_ARGS% %ACTION%
echo
3 %_EXECJAVA% %JAVA_OPTS% %CATALINA_OPTS% %JPDA_OPTS% %DEBUG_OPTS% -Djava.endorsed.dirs="%JAVA_ENDORSED_DIRS%" -classpath "%CLASSPATH%" -Dcatalina.base="%CATALINA_BASE%" -Dcatalina.home="%CATALINA_HOME%" -Djava.io.tmpdir="%CATALINA_TMPDIR%"
%MAINCLASS% %CMD_LINE_ARGS% %ACTION%
goto
end
:doSecurityJpda
%_EXECJAVA% %JAVA_OPTS% %CATALINA_OPTS% %JPDA_OPTS% %DEBUG_OPTS% -Djava
.endorsed.dirs="%JAVA_ENDORSED_DIRS%" -classpath "%CLASSPATH%" -Djava.security.manager -Djava.security.policy=="%SECURITY_POLICY_FILE%" -Dcatalina.base="%CATALINA_BASE%" -Dcatalina.home="%CATALINA_HOME%" -Djava.io.tmpdir="%CATALINA_TMPDIR%"
%MAINCLASS% %CMD_LINE_ARGS% %ACTION%
echo
4 %_EXECJAVA% %JAVA_OPTS% %CATALINA_OPTS% %JPDA_OPTS% %DEBUG_OPTS% -Djava.endorsed.dirs="%JAVA_ENDORSED_DIRS%" -classpath "%CLASSPATH%" -Djava.security.manager -Djava.security.policy=="%SECURITY_POLICY_FILE%" -Dcatalina.base="%CATALINA_BASE%" -Dcatalina.home="%CATALINA_HOME%" -Djava.io.tmpdir="%CATALINA_TMPDIR%"
%MAINCLASS% %CMD_LINE_ARGS% %ACTION%
goto
end
:end
pause
其實(shí)很簡(jiǎn)單，就是把內(nèi)容輸出，然后為了能看清，我在后面加了個(gè)pause,嘿嘿，下面我從startup.bat啟動(dòng)catalina.bat以后看輸出結(jié)果：
Using CATALINA_BASE: "F:\apache-tomcat-7.0.8"
Using CATALINA_HOME:
"F:\apache-tomcat-7.0.8"
Using CATALINA_TMPDIR:
"F:\apache-tomcat-7.0.8\temp"
Using JRE_HOME:
"E:\Program Files\Java\jdk1.7.0_40"
Using CLASSPATH:
"
F:\apache-tomcat-7.0.8\bin\bootstrap.jar;F:\apache-tomca
t-7.0.8\bin\tomcat-juli.jar
"
1
start
"Tomcat" "E:\Program Files\Java\jdk1.7.0_40\bin\java" -Djava.util.
loggi
ng
.config.file="F:\apache-tomcat-7.0.8\conf\logging.properties" -Djava.util.
logg
ing
.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs="
F:\apa
che-tomcat-7.0.8\endorsed
" -classpath "
F:\apache-tomcat-7.0.8\bin\bootstrap.jar;
F:\apache-tomcat-7.0.8\bin\tomcat-juli.jar
" -Dcatalina.base="
F:\apache-tomcat-7.
0.8
" -Dcatalina.home="F:\apache-tomcat-7.0.8" -Djava.io.tmpdir="
F:\apache-tomcat
-7.0.8\temp
" org.apache.catalina.startup.Bootstrap
start
請(qǐng)按任意鍵繼續(xù)
. . .
分析一下結(jié)果得出如下結(jié)論：
_EXECJAVA=
start
"Tomcat" "E:\Program Files\Java\jdk1.7.0_40\bin\java"
JAVA_OPTS
= -Djava.util.logging.config.file="F:\apache-tomcat-7.0.8\conf\logging.properties"
-Djava
.util.logging.manager=org.apache.juli.
ClassLoaderLogManager
CATALINA_OPTS
=
DEBUG_OPTS
=
-Djava
.endorsed.dirs="F:\apache-tomcat-7.0.8\endorsed"
-classpath
"F:\apache-tomcat-7.0.8\bin\bootstrap.jar;F:\apache-tomcat-7.0.8\bin\tomcat-juli.jar"
-Dcatalina
.base="F:\apache-tomcat-7.0.8"
-Dcatalina
.home="F:\apache-tomcat-7.0.8"
-Djava
.io.tmpdir="F:\apache-tomcat-7.0.8\temp"
MAINCLASS
=org.apache.catalina.startup.
Bootstrap
CMD_LINE_ARGS
= ACTION=
start
至于其他情況，大家自己研究吧，希望能起到拋磚引玉的作用。在文中有三處疑問(wèn)（標(biāo)紅加粗字體），由于和本文關(guān)心不太大，在以后說(shuō)明，如果誰(shuí)愿意交流也可以寫在評(píng)論中， 昨天晚上寫了這些，腦袋都混亂了，好像如果有不正確的地方，歡迎大家指認(rèn)。
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