在上一節中,我們程式的起始位置還是Bootstrap,現在我們通過bat檔案來啟動這個類。
在分析catalina.bat之前,我們先看看幾個簡單的我們能用到的dos指令。
基礎知識
1 rem 注釋,解釋器不會執行rem開始的指令
2 pause 用于暫停正在執行的批處理檔案,按任意鍵後繼續
3 echo 在控制台顯示一段文本
如果顯示變量的值需要在變量前後加% 如echo %var% 如果要輸出作業系統的名字 就是 echo %os%
4 echo off 可以将指令本身隐藏 如果要連echo off 本身也要隐藏 就是@echo off
5 set 設定一個變量
可以看下面的一個例子
@echo off
echo 你好呀?
pause
set a=15
echo %a%
echo 再按就退出
echo %os%
pause
6 label 使用:辨別一個标簽,和goto合起來使用
7 goto 跳轉到相應的label處
看下面的例子
echo start
goto end
echo 你看不到我
:end
echo endss
pause
運作上面的指令後,控制台上隻會出現
start
endss
8 if 執行條件測試
有三種用法
測試變量的值
set var=15
if %var%=15 echo 是15
測試檔案是否存在
if exist c:/file.text echo 存在檔案
9 not 取反
set var=15
if not %var%=15 echo 不是15
10 接收參數
用%1表示第一個參數 %2表示第二個 以此類推
如果有一個ss.bat裡面如下
echo %1
在控制台用下面的指令調用ss
ss hello
就會輸出第一個參數hello
11 shift
将參數後移 等于是把%2複制給了%1;%3給了%2
12 call 調用另一條指令
13 setLocal 使得對變量的修改隻在本bat檔案内有效 bat檔案結束後變量恢複原值
14 start 打開一個新的視窗
start name command
name是新的視窗的名字 後面帶着的是在新視窗中要執行的指令
當然也可以沒有指令
在tomcat的安裝目錄下有bin檔案夾
cd進去後 在指令行形式下運作catalina 就可以運作bat檔案了
不過在運作的時候 還需要一些參數
下來激動人心的時刻到了 看源碼
我們就按照調用 catalina start 來看代碼
我用//來做注釋
Catalina.bat
@echo off //隐藏指令
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.
//上面的是注釋 不管 os就是windows_NT setlocal上面有
if "%OS%" == "Windows_NT" setlocal
rem ---------------------------------------------------------------------------
rem Start/Stop Script for the CATALINA Server
rem
rem Environment Variable Prerequisites
rem
rem Do not set the variables in this script. Instead put them into a script
rem setenv.bat in CATALINA_BASE/bin to keep your customizations separate.
rem
rem CATALINA_HOME May point at your Catalina "build" directory.
rem
rem CATALINA_BASE (Optional) Base directory for resolving dynamic portions
rem of a Catalina installation. If not present, resolves to
rem the same directory that CATALINA_HOME points to.
rem
rem CATALINA_OPTS (Optional) Java runtime options used when the "start",
rem "run" or "debug" command is executed.
rem Include here and not in JAVA_OPTS all options, that should
rem only be used by Tomcat itself, not by the stop process,
rem the version command etc.
rem Examples are heap size, GC logging, JMX ports etc.
rem
rem CATALINA_TMPDIR (Optional) Directory path location of temporary directory
rem the JVM should use (java.io.tmpdir). Defaults to
rem %CATALINA_BASE%\temp.
rem
rem JAVA_HOME Must point at your Java Development Kit installation.
rem Required to run the with the "debug" argument.
rem
rem JRE_HOME Must point at your Java Runtime installation.
rem Defaults to JAVA_HOME if empty. If JRE_HOME and JAVA_HOME
rem are both set, JRE_HOME is used.
rem
rem JAVA_OPTS (Optional) Java runtime options used when any command
rem is executed.
rem Include here and not in CATALINA_OPTS all options, that
rem should be used by Tomcat and also by the stop process,
rem the version command etc.
rem Most options should go into CATALINA_OPTS.
rem
rem JAVA_ENDORSED_DIRS (Optional) Lists of of semi-colon separated directories
rem containing some jars in order to allow replacement of APIs
rem created outside of the JCP (i.e. DOM and SAX from W3C).
rem It can also be used to update the XML parser implementation.
rem Defaults to $CATALINA_HOME/endorsed.
rem
rem JPDA_TRANSPORT (Optional) JPDA transport used when the "jpda start"
rem command is executed. The default is "dt_socket".
rem
rem JPDA_ADDRESS (Optional) Java runtime options used when the "jpda start"
rem command is executed. The default is 8000.
rem
rem JPDA_SUSPEND (Optional) Java runtime options used when the "jpda start"
rem command is executed. Specifies whether JVM should suspend
rem execution immediately after startup. Default is "n".
rem
rem JPDA_OPTS (Optional) Java runtime options used when the "jpda start"
rem command is executed. If used, JPDA_TRANSPORT, JPDA_ADDRESS,
rem and JPDA_SUSPEND are ignored. Thus, all required jpda
rem options MUST be specified. The default is:
rem
rem -agentlib:jdwp=transport=%JPDA_TRANSPORT%,
rem address=%JPDA_ADDRESS%,server=y,suspend=%JPDA_SUSPEND%
rem
rem LOGGING_CONFIG (Optional) Override Tomcat's logging config file
rem Example (all one line)
rem set LOGGING_CONFIG="-Djava.util.logging.config.file=%CATALINA_BASE%\conf\logging.properties"
rem
rem LOGGING_MANAGER (Optional) Override Tomcat's logging manager
rem Example (all one line)
rem set LOGGING_MANAGER="-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager"
rem
rem TITLE (Optional) Specify the title of Tomcat window. The default
rem TITLE is Tomcat if it's not specified.
rem Example (all one line)
rem set TITLE=Tomcat.Cluster#1.Server#1 [%DATE% %TIME%]
rem
rem
rem
rem $Id: catalina.bat 1344732 2012-05-31 14:08:02Z kkolinko $
rem ---------------------------------------------------------------------------
rem Suppress Terminate batch job on CTRL+C
if not ""%1"" == ""run"" goto mainEntry //如果第一個參數不是run 去mainEntry标簽 11行後
if "%TEMP%" == "" goto mainEntry
if exist "%TEMP%\%~nx0.run" goto mainEntry
echo Y>"%TEMP%\%~nx0.run"
if not exist "%TEMP%\%~nx0.run" goto mainEntry
echo Y>"%TEMP%\%~nx0.Y"
call "%~f0" %* <"%TEMP%\%~nx0.Y"
rem Use provided errorlevel
set RETVAL=%ERRORLEVEL%
del /Q "%TEMP%\%~nx0.Y" >NUL 2>&1
exit /B %RETVAL%
:mainEntry //看不懂
del /Q "%TEMP%\%~nx0.run" >NUL 2>&1
rem Guess CATALINA_HOME if not defined
set "CURRENT_DIR=%cd%" //cd就是目前路徑
if not "%CATALINA_HOME%" == "" goto gotHome //不等于空 就去gotHome
set "CATALINA_HOME=%CURRENT_DIR%" //要是等于空 就認為catalina.bat所在的檔案夾就是 //CATALINA_HOME
if exist "%CATALINA_HOME%\bin\catalina.bat" goto okHome
cd .. //判定CATALINA_HOME裡是不是存在bin\catalina.bat
//如果不存在 傳回上一級目錄
//要記得正常情況下 catalina.bat本來就在bin目錄下
set "CATALINA_HOME=%cd%"
cd "%CURRENT_DIR%"
:gotHome
if exist "%CATALINA_HOME%\bin\catalina.bat" goto okHome //到這裡就好了 存在這個bat檔案 去okhome //看看
echo The CATALINA_HOME environment variable is not defined correctly
echo This environment variable is needed to run this program
goto end
:okHome
rem Copy CATALINA_BASE from CATALINA_HOME if not defined
if not "%CATALINA_BASE%" == "" goto gotBase //英文注釋說的很清楚了
set "CATALINA_BASE=%CATALINA_HOME%"
:gotBase
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 //就是調用setenv.bat
if not exist "%CATALINA_BASE%\bin\setenv.bat" goto checkSetenvHome
call "%CATALINA_BASE%\bin\setenv.bat"
goto setenvDone
:checkSetenvHome
if exist "%CATALINA_HOME%\bin\setenv.bat" call "%CATALINA_HOME%\bin\setenv.bat"
:setenvDone
rem Get standard Java environment variables //調用setclasspath
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"
//setclasspath.bat 會檢查環境變量java_home
//并且會設定以下的變量
//set JAVA_ENDORSED_DIRS=%BASEDIR%\common\endorsed
//set CLASSPATH=%JAVA_HOME%\lib\tools.jar
//set _RUNJAVA="%JAVA_HOME%\bin\java"
//set _RUNJAVAW="%JAVA_HOME%\bin\javaw"
//set _RUNJDB="%JAVA_HOME%\bin\jdb"
//set _RUNJAVAC="%JAVA_HOME%\bin\javac"
rem Add on extra jar files to CLASSPATH
if "%JSSE_HOME%" == "" goto noJsse //看英文注釋
set CLASSPATH=%CLASSPATH%;%JSSE_HOME%\lib\jcert.jar;%JSSE_HOME%\lib\jnet.jar;%JSSE_HOME%\lib\jsse.jar
:noJsse
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 ----- 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 //第一個參數是start 去看nojpda 15行後
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 //呵呵
if ""%1"" == ""stop"" goto doStop
if ""%1"" == ""configtest"" goto doConfigTest
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 configtest Run a basic syntax check on server.xml
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 //移動參數
if not "%OS%" == "Windows_NT" goto noTitle //剛才已經說了 os就是Windows_NT
if "%TITLE%" == "" set TITLE=Tomcat
set _EXECJAVA=start "%TITLE%" %_RUNJAVA% //title是tomcat
goto gotTitle //_EXECJAVA這就是以後的指令
:noTitle
set _EXECJAVA=start %_RUNJAVA%
:gotTitle //之前移動了參數了 但是我們确實沒有第二個參數 去看execCmd 24行後
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
:doConfigTest
shift
set ACTION=configtest
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 //此時的第一個參數為空 是以去看doneSetArgs
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 //兩個變量都為空
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%
// 在我的電腦上将上面的變量指派後就是
//start "Tomcat" "C:\j2sdk1.4.2_02\bin\java" -
//Djava.endorsed.dirs="..\common\endorsed" -classpath
//"C:\j2sdk1.4.2_02\lib\tools.jar;..\bin\bootstrap.jar" -
//Dcatalina.base=".." -Dcatalina,home=".." -Djava.io.tmpdir="..\temp"
//org.apache.catalina.startup.Bootstrap start
//解釋一下
//啟動一個新的視窗叫tomcat 然後就調用java指令 從-Djava到/temp都是參數
//運作的是org.apache.catalina.startup.Bootstrap 參數是start
//我累個去 重要寫完啦
//感謝glt
goto end //去看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 //對end在這
其實還沒有到最開始的那個類
當當當當~~~
Startup.bat
@echo off
if "%OS%" == "Windows_NT" setlocal
rem ---------------------------------------------------------------------------
rem Start script for the CATALINA Server
rem
rem $Id: startup.bat,v 1.4 2002/01/15 02:55:38 patrickl Exp $
rem ---------------------------------------------------------------------------
rem Guess CATALINA_HOME if not defined
if not "%CATALINA_HOME%" == "" goto gotHome
set CATALINA_HOME=. // 一個點是目前目錄
if exist "%CATALINA_HOME%\bin\catalina.bat" goto okHome
set CATALINA_HOME=.. //兩個點事上級目錄 哎 今天漲姿勢了
:gotHome
//上一級目錄裡面是有bin檔案夾的 是以去okhome
if exist "%CATALINA_HOME%\bin\catalina.bat" goto okHome
echo The CATALINA_HOME environment variable is not defined correctly
echo This environment variable is needed to run this program
goto end
:okHome
set EXECUTABLE=%CATALINA_HOME%\bin\catalina.bat
rem Check that target executable exists
if exist "%EXECUTABLE%" goto okExec //EXECUTABLE肯定有呀 去看okExec
echo Cannot find %EXECUTABLE%
echo This file is needed to run this program
goto end
:okExec
rem Get remaining unshifted command line arguments and save them in the
set CMD_LINE_ARGS=
:setArgs
if ""%1""=="""" goto doneSetArgs //這裡沒有參數 是以去doneSetArgs
set CMD_LINE_ARGS=%CMD_LINE_ARGS% %1
shift
goto setArgs
:doneSetArgs
call "%EXECUTABLE%" start %CMD_LINE_ARGS% //調用bin\catalina.bat并且參數為start
:end
tomcat終于結束了 感謝glt
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