Shell执行/调用Java/Jar程序例子的实例详解
前言：
最近要写一个独立的Java程序去监控Hadoop和Oozie,通过Shell去调用.写代码到现在也4年多了,貌似就从来没在生产环境中写过一个独立的Java程序,不是部署到Tomcat就是直接丢给Hadoop.于是参考Hadoop等开源环境,自己写了一个demo,并且可以通过Ant打包生成可运行的程序.所以这里有三步:Java程序,Shell,Ant
1.首先建立Java程序,由于是例子,所以这里很简单,只是输出传入参数的个数,
代码如下:
package com.guoyun.study.shell;
public class ShellJavaAnt {
/** * @param args */ public static void main(String[] args) {
System.out.println("arguments length:"+args.length);
}
}
2.Shell脚本
Shell代码
#!/bin/bash # PRG="${
0}
" while [ -h "${
PRG}
" ];
do ls=`ls -ld "${
PRG}
"` link=`expr "$ls" : '.*-> (.*)$'` if expr "$link" : '/.*' > /dev/null;
then PRG="$link" else PRG=`dirname "${
PRG}
"`/"$link" fi done BASEDIR=`dirname ${
PRG}
` BASEDIR=`cd ${
BASEDIR}
/..;
pwd` if test -z ${
JAVA_HOME}
then JAVA_BIN=java else JAVA_BIN=${
JAVA_HOME}
/bin/java fi CLASS_PATH=$BASEDIR/shell-run-java-by-ant-*.jar SERVICE_CLASS="com.guoyun.study.shell.ShellJavaAnt" ${
JAVA_BIN}
-cp $CLASS_PATH ${
SERVICE_CLASS}
"${
@}
" exit 0
3.ANT
Xml代码
<project name="shell-run-java-by-ant" default="release-jar" basedir="."> <property file="build.properties" /> <property name="jar.name" value="shell-run-java-by-ant" /> <property name="version" value="0.1" /> <property name="package.name" value="${
jar.name}
-${
version}
" /> <property name="build.dir" location="build" /> <property name="build.cache.dir" location="${
build.dir}
/cache" /> <property name="build.lib.dir" location="${
build.dir}
/lib" /> <property name="javadoc.dir" location="javadoc" /> <property name="dist.dir" location="dist" /> <property name="dist.java.dir" location="${
dist.jar}
/java" /> <property name="package.dir" location="${
dist.dir}
/${
package.name}
" /> <property name="tar.file" location="${
dist.dir}
/${
jar.name}
-${
version}
.tar.gz" /> <property name="src.dir" location="src" /> <property name="java.src.dir" location="${
src.dir}
/java" /> <property name="test.src.dir" location="${
src.dir}
/test" /> <property name="classes.dir" location="${
build.dir}
/classes" /> <property name="lib.dir" value="${
basedir}
/lib"/> <property name="script.dir" value="${
basedir}
/script"/> <target name="release" description="sets properties for release builds."> <echo message="Building in release mode..."/> <property name="compile.mode" value="release"/> <property name="java.debug" value="false"/> </target> <target name="init"> <tstamp/> <mkdir dir="${
build.dir}
" /> <mkdir dir="${
classes.dir}
" /> </target> <macrodef name="compile-source"> <sequential> <javac srcdir="${
java.src.dir}
" destdir="${
classes.dir}
" debug="${
java.debug}
" debuglevel="lines,vars,source"> <classpath> <fileset dir="lib"> <include name="**/*.jar"/> </fileset> </classpath> </javac> </sequential> </macrodef> <target name="compile" depends="init" description="compile the source"> <compile-source /> </target> <target name="jar" depends="compile"> <delete file="${
build.dir}
/${
jar.name}
-${
version}
.jar"/> <jar jarfile="${
build.dir}
/${
jar.name}
-${
version}
.jar"> <fileset dir="${
classes.dir}
"/> </jar> </target> <target name="package" depends="clean, jar"> <mkdir dir="${
package.dir}
"/> <mkdir dir="${
package.dir}
/lib"/> <mkdir dir="${
package.dir}
/bin" /> <copy todir="${
package.dir}
/lib" includeEmptyDirs="false"> <fileset dir="${
lib.dir}
"> <include name="**/*" /> </fileset> </copy> <copy todir="${
package.dir}
"> <fileset file="${
build.dir}
/${
jar.name}
-${
version}
.jar"/> </copy> <copy todir="${
package.dir}
/" file="build.xml"/> <copy todir="${
package.dir}
/bin" includeEmptyDirs="false"> <fileset dir="${
basedir}
/script/shell"> <include name="**/*" /> </fileset> </copy> <chmod file="${
package.dir}
/bin/*" perm="ugo+rx"/> </target> <target name="tar" depends="package" description="Create release tarball"> <tar compression="gzip" longfile="gnu" destfile="${
tar.file}
"> <tarfileset dir="${
package.dir}
" mode="777" prefix="${
package.name}
"> <exclude name="bin/*" /> <exclude name="**/*.sh" /> <include name="**" /> </tarfileset> <tarfileset dir="${
package.dir}
" mode="777" prefix="${
package.name}
"> <include name="**/*.sh" /> </tarfileset> </tar> <delete dir="${
package.dir}
" /> </target> <target name="javadoc" depends="compile" description="generate documentation" > <delete dir="${
javadoc.dir}
" /> <javadoc destdir="${
javadoc.dir}
"> <fileset dir="${
java.src.dir}
" /> <classpath> <fileset dir="${
lib.dir}
"> <include name="**/*.jar"/> </fileset> </classpath> </javadoc> </target> <target name="release-jar" description="Build release and jar" depends="release,jar"/> <target name="clean" description="clean up"> <delete dir="${
build.dir}
"/> <delete dir="${
classes.dir}
" /> <delete dir="${
dist.dir}
"/> </target> </project>
由于比较简单,这里就不多做注释,完整例子,请见附件.使用的话,只要进入你的工程,运行ant package,便会将程序打包到$YOUR_PROJECT/dist目录下.之后进入该程序运行bin/shell-java-ant a b c d e f g,就会得到arguments length:7
这样子的输出.
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