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bat执行java程序的脚本解析

2024-11-22 18:04:01   203人阅读

 

bat:

运行Java程序，脚本中的主要操作是设置classpath.
脚本的功能：
(1)设置path:可以找到java命令
(2)设置splash(启动画面)
(3)设置classpath:主程序运行时找到引用的class
(4)设置远程调试需要的相关参数

@echo offif "%OS%"=="Windows_NT" @setlocalif "%OS%"=="WINNT" @setlocal@title RRU Hotload Patch toolset workpath=%~dp0set path=%path%;%workpath%\libset JAVA_HOME=%workpath%\jdk-windowsrem set JAVA_OPTS=%JAVA_OPTS% -splash:%workpath%\img\welcome.gifset JAVA_OPTS=%JAVA_OPTS% -classpath %workpath%\lib\*;rem set JAVA_OPTS=-classic -Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,address=3999,server=y,suspend=n %JAVA_OPTS%%JAVA_HOME%\bin\java %JAVA_OPTS%  PackageName.ClassName


Analyze:
1.@echo off

(1)． 作为控制批处理命令在执行时是否显示命令行自身的开关
格式:ECHO [ON|OFF]
(2)． 关闭DOS命令提示符
在DOS提示符状态下键入ECHO OFF,能够关闭DOS提示符的显示使屏幕只留下光标,直至键入ECHO ON,提示符才会重新出现.

http://network.51cto.com/art/201009/225457.htm
@的用法参见：http://www.cnblogs.com/softidea/p/4229829.html

2.%OS%是个系统变量

3.setlocal

setlocal /?开始批处理文件中环境改动的本地化操作。在执行 SETLOCAL 之后所做的环境改动只限于批处理文件。要还原原先的设置，必须执行 ENDLOCAL。达到批处理文件结尾时，对于该批处理文件的每个尚未执行的 SETLOCAL 命令，都会有一个隐含的 ENDLOCAL 被执行。

eg:

@echo offset test=testecho %test%setlocalecho after setlocalecho %test%set test=newContentecho %test%endlocalecho after endlocalecho %test%

Output:

testafter setlocaltestnewContentafter endlocaltest

http://www.jb51.net/article/36043.htm

扩展：
setlocal enabledelayedexpansion 

eg:

@echo off set a=4 set a=5&echo %a% echo ==========================setlocal enabledelayedexpansion set a=4 set a=5&echo !a! echo %a%pause

Output:

4==========================55请按任意键继续. . .

http://www.jb51.net/article/29323.htm



4、title

title /?设置命令提示窗口的窗口标题。TITLE [string]  string       指定命令提示窗口的标题。

5、%~dp0
http://www.cnblogs.com/softidea/p/4229829.html
6、-splash

java -helpUsage: java [-options] class [args...]           (to execute a class)   or  java [-options] -jar jarfile [args...]           (to execute a jar file)   -splash:<imagepath>                 show splash screen with specified image

7、-Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,address=3999,server=y,suspend=n

-Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,server=y,address=3999,suspend=n-XDebug               启用调试。-Xnoagent             禁用默认sun.tools.debug调试器。-Djava.compiler=NONE  禁止 JIT 编译器的加载。-Xrunjdwp             加载JDWP的JPDA参考执行实例。transport             用于在调试程序和 VM 使用的进程之间通讯。dt_socket             套接字传输。dt_shmem              共享内存传输，仅限于 Windows。server=y/n            VM 是否需要作为调试服务器执行。address=3999          调试服务器的端口号，客户端用来连接服务器的端口号。suspend=y/n           是否在调试客户端建立连接之后启动 VM 。

http://www.blogjava.net/yongbing/articles/221179.html

 

Extension part：

linux：

echo "Add the XXX‘s Lib path into the CLASSPATH..."CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jaroldClsPath=$CLASSPATHLIPPATH=/opt/system/jakarta-tomcat-5.0.28/webapps/JavaService/WEB-INF/lib/*.jar#echo $LIPPATHcf=.for i in $LIPPATHdocf=$cf:"$i"#echo $cfdoneecho "The XXX‘s Lib path have been added into the CLASSPATH..."#echo $cfexport CLASSPATH=$CLASSPATH:$cfecho $CLASSPATH#ps: if you want to run a java application, you must be copy this .bat file to the class directory.java -cp CLASSPATH PackageName.ClassName#ok

windows:

@echo offif "%OS%"=="Windows_NT" @setlocalif "%OS%"=="WINNT" @setlocalsetlocal ENABLEDELAYEDEXPANSIONECHO.ECHO "Set CLASSPATH begin..."set CP=.for %%k in ("D:/Program Files/apache-tomcat-6.0.16/webapps/axis/WEB-INF"/lib/*.jar) do set CP=!CP!;%%kset CLASSPATH=%CLASSPATH%;%CP%ECHO "Set CLASSPATH is ok..."ECHO "Show the CLASSPATH: "ECHO.ECHO %CLASSPATH%ECHO.rem "you can add some code here."rem ps: if you want to run a java application, you must be copy this .bat file to the class directory.rem java -cp CLASSPATH PackageName.ClassNamerem ""rem ""PAUSE

http://blog.csdn.net/faye0412/article/details/2986516

bat执行java程序的脚本解析


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