bat执行java程序的脚本解析

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 off
if "%OS%"=="Windows_NT" @setlocal
if "%OS%"=="WINNT" @setlocal
@title RRU Hotload Patch tool
set workpath=%~dp0
set path=%path%;%workpath%\lib
set JAVA_HOME=%workpath%\jdk-windows
rem set JAVA_OPTS=%JAVA_OPTS% -splash:%workpath%\img\welcome.gif
set 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

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。

@echo off
set test=test
echo %test%
setlocal
echo after setlocal
echo %test%
set test=newContent
echo %test%
endlocal
echo after endlocal
echo %test%

test
after setlocal
test
newContent
after endlocal
test

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

4
==========================
5
5
请按任意键继续. . .

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。

java -help
Usage: 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

-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 。

echo "Add the XXX‘s Lib path into the CLASSPATH..."
CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
oldClsPath=$CLASSPATH
LIPPATH=/opt/system/jakarta-tomcat-5.0.28/webapps/JavaService/WEB-INF/lib/*.jar
#echo $LIPPATH
cf=.
for i in $LIPPATH
do
cf=$cf:"$i"
#echo $cf
done
echo "The XXX‘s Lib path have been added into the CLASSPATH..."
#echo $cf
export CLASSPATH=$CLASSPATH:$cf
echo $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

@echo off
if "%OS%"=="Windows_NT" @setlocal
if "%OS%"=="WINNT" @setlocal
setlocal ENABLEDELAYEDEXPANSION
ECHO.
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!;%%k
set 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.ClassName
rem ""
rem ""
PAUSE