整理一个ANT在J2EE项目中的应用，含预编译JSP和打包WAR/EAR文件！

首先，假设我们的项目的结构如下，相同的目录大家可以自行扩展！

${project.root}

|

+-- build/ <-- WAR/EAR档的目录

+-- classes/ <-- 编译的输出目录，与JBuilder兼容

+-- src/ <-- Java源文件目录

+-- web/ <-- WEB Content 目录

| |

| +--pages/ <-- JSP 文件目录

| +--WEB-INF/ <-- web.xml 等配置文件

+-- ejb <-- EJB Content 目录

| |

| +--META-INF/ <-- EJB 配置文件

+-- ear <-- EAR Content 目录

| |

| +--META-INF/ <-- EAR 配置文件

|-- lib <-- 项目所要用到的library

接下来第一步，就是要先定义好一些全局的参数，以便以后更改起来方便，风格

大家自己选择好了，我用的是如下的方式：

(1) 给出项目的目录：

<!--// project directories //-->

<property name="dir.project" value="D:/Code/MyProject"/>

<property name="dir.project.lib" value="${dir.project}/lib"/>

<property name="dir.project.src" value="${dir.project}/src"/>

<property name="dir.project.web_module" value="${dir.project}/web"/>

<property name="dir.project.ejb_module" value="${dir.project}/ejb"/>

<property name="dir.project.ear_module" value="${dir.project}/ear"/>

<!--// compile, build and deploy directories //-->

<property name="dir.project.compile" value="${dir.project}/classes"/>

<property name="dir.project.compile.jspcache" value="${dir.project.compile}/jspcache"/>

<property name="dir.project.build" value="${dir.project}/build"/>

<!--// J2EE Container //-->

<property name="dir.appserver.tomcat.home" value="D:/J2EE_HOME/AppServer/Tomcat"/>

<property name="dir.appserver.oc4j.j2ee.home" value="D:/J2EE_HOME/AppServer/OC4J/j2ee/home"/>

(2) 定义Java Source的编译选项

<!--// Java compiler options //-->

<property name="opt.compile.source" value="1.4"/>

<property name="opt.compile.target" value="1.4"/>

<property name="opt.compile.encoding" value="UTF-8"/>

<property name="opt.compile.deprecation" value="on"/>

<property name="opt.compile.debug" value="on"/>

<property name="opt.compile.optimize" value="off"/>

(3) 如果需要 import EJB library 的话，给出下面的定义，后面会用到

<!--// EJB imported resource //-->

<property name="import.ejb.report.server" value="${dir.project.lib}/AppFramework.jar"/>

(4) 给出部署WAR/EAR文件的名称：

<!--// Deployment //-->

<property name="deploy.file.ejb_module" value="MyApp_EJB.jar" />

<property name="deploy.file.web_module" value="MyApp_WEB.war" />

<property name="deploy.file.ear_module" value="MyApp.ear" />

(5) 给出CLASSPATH的定义，引入相关的Library和项目编译生成的Java Classes

<path id="CLASSPATH">

<!--// Tomcat Libraries //-->

<fileset dir="${dir.appserver.tomcat.home}/bin">

<include name="*.jar"/>

</fileset>

<fileset dir="${dir.appserver.tomcat.home}/server/lib">

<include name="*.jar"/>

</fileset>

<fileset dir="${dir.appserver.tomcat.home}/common/lib">

<include name="*.jar"/>

</fileset>

<!--// OC4J Libraries

<fileset dir="${dir.appserver.oc4j.j2ee.home}">

<include name="*.jar"/>

</fileset>

<fileset dir="${dir.appserver.oc4j.j2ee.home}/lib">

<include name="*.jar"/>

</fileset>

//-->

<!--// Depended Libraries //-->

<pathelement location="${dir.project.lib}/abc.jar"/>

<pathelement location="${dir.project.lib}/AppServer.jar"/>

<pathelement location="${dir.project.lib}/AppServiceClient.jar"/>

<pathelement location="${dir.project.lib}/AppUtil.jar"/>

<pathelement location="${dir.project.lib}/xport.jar"/>

<pathelement location="${dir.project.lib}/jaxen-full.jar"/>

<pathelement location="${dir.project.lib}/jstl.jar"/>

<pathelement location="${dir.project.lib}/log4j-1.2.13.jar"/>

<pathelement location="${dir.project.lib}/ojdbc14.jar"/>

<pathelement location="${dir.project.lib}/saxpath.jar"/>

<pathelement location="${dir.project.lib}/standard.jar"/>

<pathelement location="${dir.project.lib}/taglibs-log.jar"/>

<!--// Project classes //-->

<pathelement location="${dir.project.compile}"/>

</path>

(6) 基本的clean和init的task

<target name="clean">

<delete dir="${dir.project.build}"/>

<delete dir="${dir.project.compile.jspcache}"/>

<delete dir="${dir.project.compile}"/>

<delete dir="${dir.project.web_module}/WEB-INF/classes"/>

<delete dir="${dir.project.web_module}/WEB-INF/lib"/>

</target>

<target name="init">

<mkdir dir="${dir.project.compile}"/>

<mkdir dir="${dir.project.compile.jspcache}"/>

<mkdir dir="${dir.project.web_module}/WEB-INF/classes"/>

<mkdir dir="${dir.project.web_module}/WEB-INF/lib"/>

<mkdir dir="${dir.project.build}"/>

</target>

(7) 编译Java Source

<target name="src_compile" depends="init">

<!--// compile the Java source //-->

<javac srcdir="${dir.project.src}"

destdir="${dir.project.compile}"

encoding="${opt.compile.encoding}"

source="${opt.compile.source}"

target="${opt.compile.source}"

deprecation="${opt.compile.deprecation}"

debug="${opt.compile.debug}"

optimize="{opt.compile.optimize}" >

<classpath refid="CLASSPATH"/>

<include name="**/*.java"/>

</javac>

<!--// copy the classpath resources //-->

<copy todir="${dir.project.compile}">

<fileset dir="${dir.project.src}">

<exclude name="**/*.java"/>

</fileset>

</copy>

</target>

(8) 预编译JSP文件，可选择基于Tomcat或是Oracle Application Server

<!--// for Tomcat //-->

<target name="jsp_src_generate" depends="src_compile">

<taskdef classname="org.apache.jasper.JspC" name="jasper2">

<classpath refid="CLASSPATH"/>

</taskdef>

<jasper2 validateXml="false"

verbose="9"

uriroot="${dir.project.web_module}"

outputDir="${dir.project.compile.jspcache}"

webXmlFragment="${dir.project.compile.jspcache}/generated-web.xml" />

</target>

<!--// for OC4J 9.0.4

<target name="jsp_src_generate" depends="src_compile">

<java classname="oracle.jsp.tools.Jspc" fork="yes" failonerror="true">

<classpath refid="CLASSPATH"/>

<arg line="-extend com.orionserver.http.OrionHttpJspPage"/>

<arg line="-srcdir ${dir.project.compile.jspcache}"/>

<arg line="-appRoot ${dir.project.web_module}"/>

<arg line="-noCompile"/>

<arg line="-debug"/>

<arg line="-verbose"/>

<arg line="${dir.project.web}/*.jsp"/>

</java>

</target>

//-->

<target name="jsp_src_compile">

<javac srcdir="${dir.project.compile.jspcache}"

destdir="${dir.project.compile.jspcache}"

encoding="${opt.compile.encoding}"

source="${opt.compile.source}"

target="${opt.compile.source}"

deprecation="${opt.compile.deprecation}"

debug="${opt.compile.debug}"

optimize="{opt.compile.optimize}" >

<classpath refid="CLASSPATH"/>

<include name="**"/>

</javac>

</target>

<target name="jsp_precompile" depends="src_compile, jsp_src_generate, jsp_src_compile" />

(9) 开始进行compile，make 和 build，并生成部署档案

<target name="compile" depends="src_compile, jsp_precompile" />

<!--// Build WAR file //-->

<target name="make.web_module" depends="compile">

<war destfile="${dir.project.build}/${deploy.file.web_module}" webxml="${dir.project.web_module}/WEB-INF/web.xml">

<fileset dir="${dir.project.web_module}" >

<include name="**"/>

<exclude name="WEB-INF/classes/**"/>

<exclude name="WEB-INF/lib/**"/>

</fileset>

<classes dir="${dir.project.compile}">

<include name="**"/>

<exclude name="project/package/trx/**"/>

<exclude name="jspcache/**"/>

</classes>

<lib dir="${dir.project.lib}">

<include name="AppUtil.jar"/>

<include name="AppClient.jar"/>

</lib>

</war>

</target>

<!--// Build EJB Jar file //-->

<target name="make.ejb_module" depends="src_compile">

<jar destfile="${dir.project.build}/${deploy.file.ejb_module}">

<zipgroupfileset dir="${dir.project.lib}">

<include name="AppServer.jar"/>

</zipgroupfileset>

<fileset dir="${dir.project.ejb_module}">

<include name="**"/>

</fileset>

<fileset dir="${dir.project.compile}">

<include name="**"/>

<exclude name="project/package/controller/**"/>

<exclude name="jspcache/**"/>

</fileset>

</jar>

</target>

<!--// Build EAR file //-->

<target name="make.ear_module" depends="compile, make.web_module, make.ejb_module">

<ear destfile="${dir.project.build}/${deploy.file.ear_module}" appxml="${dir.project.ear_module}/META-INF/application.xml">

<fileset dir="${dir.project.build}">

<include name="${deploy.file.web_module}"/>

<include name="${deploy.file.ejb_module}"/>

</fileset>

</ear>

</target>

<target name="make" depends="init, compile, make.web_module, make.ejb_module, make.ear_module" />

<target name="build" depends="clean, init, make" />

好了, 把上面的内容综合起来, 就可以用ant build命令来编译了！