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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