您的位置：首页 > Web前端 > JavaScript

利用ant构建 jsp->servlet->class->jar

2016-07-08 14:38 531 查看
【0】README
1）本文旨在 给出 利用ant构建 jsp->servlet->class->jar 的分析；
2）本文部分内容转自：http://zfsn.iteye.com/blog/757919

【1】ant脚本内容 及其分析
1）build.xml
<?xml version="1.0" encoding="UTF-8"?>
<project name="webNews" basedir="." default="servlet2class">
<property file="build.properties" />

<target name="all" depends="jsp2servlet,servlet2class,class2jar" />

<target name="help">
<echo message="显示功能列表" />
<echo message="jsp2java  通过JspC将JSP转换成Java源代码" />
<echo message="java2class 将转换后的Java源代码进行编译成class文件" />
<echo message="class2jar 将编译后的class文件打包" />
<echo message="clear  清理现场" />
</target>

<target name="jsp2servlet">
<taskdef classname="org.apache.jasper.JspC" name="jsp2java">
<classpath id="jsp2servlet.classpath">
<fileset dir="${tomcat.home}/bin">
<include name="*.jar" />
</fileset>
<fileset dir="${tomcat.home}/lib">
<include name="*.jar" />
</fileset>
</classpath>
</taskdef>
<jsp2java
classpath="jsp2java.classpath"
javaEncoding="UTF-8"
validateXml="false"
uriroot="${webapp.path}/WebRoot"
webXmlFragment="${webapp.path}/WebRoot/WEB-INF/webJSP.xml"
webXml="${webapp.path}/WebRoot/WEB-INF/web.xml"
outputDir="${webapp.path}/WebRoot/WEB-INF/JspC/src" />
</target>

<target name="servlet2class">
<mkdir dir="${webapp.path}/WebRoot/WEB-INF/JspC/classes" />
<javac
srcdir="${webapp.path}/WebRoot/WEB-INF/JspC/src"
destdir="${webapp.path}/Webroot/WEB-INF/JspC/classes"
encoding="utf-8"
optimize="off"
debug="on"
failonerror="false"
excludes="**/*.smap">
<classpath id="java2class.classpath">
<fileset dir="${webapp.path}/WebRoot/WEB-INF/lib">
<include name="*.jar" />
</fileset>
<fileset dir="${tomcat.home}/lib">
<include name="*.jar" />
</fileset>
<fileset dir="${tomcat.home}/bin">
<include name="*.jar" />
</fileset>
<pathelement location="${webapp.path}/WebRoot/WEB-INF/classes" />
</classpath>
</javac>
</target>

<target name="class2jar">
<!-- <mkdir dir="${webapp.path}/WebRoot/WEB-INF/lib" /> -->
<jar
jarfile="${webapp.path}/WebRoot/WEB-INF/lib/${webapp.name}JSP.jar"
basedir="${webapp.path}/Webroot/WEB-INF/JspC/classes" />
</target>

<target name="clear">
<delete dir="${webapp.path}/WebRoot/WEB-INF/JspC/src" />
<delete dir="${webapp.path}/Webroot/WEB-INF/JspC/classes" />
<delete dir="${webapp.path}/WebRoot/WEB-INF/lib/${webapp.name}JSP.jar">
</delete>
</target>
</project>

2）build.properties
#tomcat home
tomcat.home=D:\\Development\\Tomcat\\apache-tomcat-8.0.36
webapp.path=E:\\bench-cluster\\spring_in_action_eclipse\\precompileJSP
webapp.name=precompileJSP

对以上ant 脚本的分析（Analysis）

A1）jsp->servlet：（将jsp 转换为 servlet——特殊的java类）
<target name="jsp2servlet">
<taskdef classname="org.apache.jasper.JspC" name="jsp2java">
<classpath id="jsp2servlet.classpath">
<fileset dir="${tomcat.home}/bin">
<include name="*.jar" />
</fileset>
<fileset dir="${tomcat.home}/lib">
<include name="*.jar" />
</fileset>
</classpath>
</taskdef>
<jsp2java
classpath="jsp2java.classpath"
javaEncoding="UTF-8"
validateXml="false"
uriroot="${webapp.path}/WebRoot"
webXmlFragment="${webapp.path}/WebRoot/WEB-INF/webJSP.xml"
webXml="${webapp.path}/WebRoot/WEB-INF/web.xml"
outputDir="${webapp.path}/WebRoot/WEB-INF/JspC/src" />
</target>
org.apache.jasper.JspC 的属性设置，参见  https://tomcat.apache.org/tomcat-8.0-doc/api/org/apache/jasper/JspC.html；





Attention）注意上述目录生成的 web.xml， 该文件设置了 servlet 到 uri 的 映射
<?xml version="1.0" encoding="ISO-8859-1"?>

<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<!--
Automatically created by Apache Tomcat JspC.
-->
<web-app>

<servlet>
<servlet-name>org.apache.jsp.home_jsp</servlet-name>
<servlet-class>org.apache.jsp.home_jsp</servlet-class>
</servlet>

<servlet>
<servlet-name>org.apache.jsp.views.home_jsp</servlet-name>
<servlet-class>org.apache.jsp.views.home_jsp</servlet-class>
</servlet>

<servlet-mapping>
<servlet-name>org.apache.jsp.home_jsp</servlet-name>
<url-pattern>/home.jsp</url-pattern>
</servlet-mapping>

<servlet-mapping>
<servlet-name>org.apache.jsp.views.home_jsp</servlet-name>
<url-pattern>/views/home.jsp</url-pattern>
</servlet-mapping>
</web-app>


A2）servlet->class：（将 servlet 文件编译为 class文件）
<target name="servlet2class">
<mkdir dir="${webapp.path}/WebRoot/WEB-INF/JspC/classes" />
<javac
srcdir="${webapp.path}/WebRoot/WEB-INF/JspC/src"
destdir="${webapp.path}/Webroot/WEB-INF/JspC/classes"
encoding="utf-8"
optimize="off"
debug="on"
failonerror="false"
excludes="**/*.smap">
<classpath id="java2class.classpath">
<fileset dir="${webapp.path}/WebRoot/WEB-INF/lib">
<include name="*.jar" />
</fileset>
<fileset dir="${tomcat.home}/lib">
<include name="*.jar" />
</fileset>
<fileset dir="${tomcat.home}/bin">
<include name="*.jar" />
</fileset>
<pathelement location="${webapp.path}/WebRoot/WEB-INF/classes" />
</classpath>
</javac>
</target>



A3）class->jar：（将 上述编译得到的 class 文件打包为 jar）
<target name="class2jar">
<!-- <mkdir dir="${webapp.path}/WebRoot/WEB-INF/lib" /> -->
<jar
jarfile="${webapp.path}/WebRoot/WEB-INF/lib/${webapp.name}JSP.jar"
basedir="${webapp.path}/Webroot/WEB-INF/JspC/classes" />
</target>



A4）清理临时文件工作
<target name="clear">
<delete dir="${webapp.path}/WebRoot/WEB-INF/JspC/src" />
<delete dir="${webapp.path}/Webroot/WEB-INF/JspC/classes" />
<delete dir="${webapp.path}/WebRoot/WEB-INF/lib/${webapp.name}JSP.jar">
</delete>
</target>


【2】windows 下执行上述命令的 console info 
E:\bench-cluster\spring_in_action_eclipse\precompileJSP>ant jsp2servlet
Buildfile: E:\bench-cluster\spring_in_action_eclipse\precompileJSP\build.xml

jsp2servlet:
[jsp2java] 七月 08, 2016 2:31:24 下午 org.apache.jasper.servlet.TldScanner scanJars
[jsp2java] 信息: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that w
ere scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.

BUILD SUCCESSFUL
Total time: 0 seconds

E:\bench-cluster\spring_in_action_eclipse\precompileJSP>ant servlet2class
Buildfile: E:\bench-cluster\spring_in_action_eclipse\precompileJSP\build.xml

servlet2class:
[mkdir] Created dir: E:\bench-cluster\spring_in_action_eclipse\precompileJSP\WebRoot\WEB-INF\JspC\classes
[javac] E:\bench-cluster\spring_in_action_eclipse\precompileJSP\build.xml:45: warning: 'includeantruntime' was not set, defaulting to build.syscla
sspath=last; set to false for repeatable builds
[javac] Compiling 2 source files to E:\bench-cluster\spring_in_action_eclipse\precompileJSP\Webroot\WEB-INF\JspC\classes

BUILD SUCCESSFUL
Total time: 0 seconds

E:\bench-cluster\spring_in_action_eclipse\precompileJSP>ant class2jar
Buildfile: E:\bench-cluster\spring_in_action_eclipse\precompileJSP\build.xml

class2jar:
[jar] Building jar: E:\bench-cluster\spring_in_action_eclipse\precompileJSP\WebRoot\WEB-INF\lib\precompileJSPJSP.jar

BUILD SUCCESSFUL
Total time: 0 seconds
内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理 点击这里给我发消息
标签： 
相关文章推荐
新的分享
章节导航