使用ANT与YUI压缩js的实现方法

由于项目使用的js很多，为了提高系统效率，将js做压缩处理。
成功的对多个js进行压缩，必须经历下面两步。
1.合并多个js成为一个js.
2.将和并过后的js进行压缩处理。
使用的ant配置主要有：


代码如下:

<property  name="root" value="WebRoot"></property>
 <property  name="js" value="${root}/js"></property>
 <property  name="map_function_js" value="${js}/mapfunc"></property>
 <property name="lib" value="lib"/>
 <property  name="build" value="build"></property>
 <property  name="war" value="war"></property>
 <property  name="war.info" value="${war}/WEB-INF"></property>
 <property  name="war.lib" value="${war.info}/lib"></property>
 <property  name="war.classes" value="${war.info}/classes"></property>
 <property  name="project.name" value="zjmap"></property>
 <property name="charset" value="utf-8"/>
 <property name="src" value="src"/>
 <target name="创建build目录">
   <mkdir dir="${build}"/>
  </target>

代码如下:

<!-- 将多个js合并成为一个js -->
  <target name="合并js" depends="创建build目录">
          <concat destfile="${build}/mapfuncall.js" encoding="${charset}" outputencoding="${charset}">
           <path path="${map_function_js}/DC.js" />
        <path path="${map_function_js}/stringUtil.js" />
           <path path="${map_function_js}/LOCALDC.js" />
           <path path="${map_function_js}/screen.js" />
           <path path="${map_function_js}/wfsQuery.js" />
           <path path="${map_function_js}/Map.js" />
           <path path="${map_function_js}/Query.js" />
           <path path="${map_function_js}/ClassificationQuery.js" />
           <path path="${map_function_js}/BusQuery.js" />
           <path path="${map_function_js}/RouteQuery.js" />
           <path path="${map_function_js}/cursorPosition.js" />
           <path path="${map_function_js}/bufferAnalysis.js" />
           <path path="${map_function_js}/divCtrl.js" />
            <path path="${map_function_js}/mark.js" />
           <path path="${map_function_js}/overlayAnalysis.js" />
           <path path="${map_function_js}/BuildQuery.js" />
           <path path="${map_function_js}/PopShow.js" />
           <path path="${map_function_js}/correct.js" />
           <path path="${map_function_js}/style_result.js" />
            <path path="${map_function_js}/style_ui.js" />
           <path path="${map_function_js}/Catalog.js" />
           <path path="${map_function_js}/scenario.js" />
           <path path="${map_function_js}/wfs.js" />
           <path path="${map_function_js}/Uuid.js" />
           <path path="${map_function_js}/Gps.js" />
           <path path="${map_function_js}/typhoon.js" />
           <path path="${map_function_js}/Monitor.js" />
           <path path="${map_function_js}/RainWater.js" />
           <path path="${map_function_js}/Approval.js" />
           <path path="${map_function_js}/statistics.js" />
           <path path="${map_function_js}/statisticsNew.js" />
           <path path="${map_function_js}/OTileCacheCustom.js" />
           <path path="${map_function_js}/BQTool.js" />
           <path path="${map_function_js}/CityPositionQuery.js" />
           <path path="${map_function_js}/IFieldService.js" />
           <path path="${map_function_js}/SpecialQuery.js" />
          </concat>
          <replaceregexp match="@DEBUG@" replace="" flags="g" byline="true" file="${build}/mapfuncall.js" encoding="${charset}" />
  </target>
 <!-- 使用雅虎UI进行js压缩 -->
 <target name="开始压缩" depends="合并js">
          <!-- 使用雅虎UI压缩 mapfuncall.js -->
         <antcall target="压缩mapfuncall.js"></antcall>
           <!-- 使用雅虎UI压缩 dataedit.js -->
         <antcall target="压缩dataedit.js"></antcall>
          <!-- 使用雅虎UI压缩 ISuggest.js -->
         <antcall target="压缩ISuggest.js"></antcall>
         <!-- 复制压缩后的js文件 -->
         <antcall target="复制压缩js文件"></antcall>
 </target>
 <target name="压缩mapfuncall.js">
   <java jar="${lib}/yui/yuicompressor-2.4.6.jar" fork="true">
                <arg line="--type js --charset utf-8 ${map_function_js}/mapfuncall.js -o ${build}/mapfuncall-min.js"/>          
   </java>
 </target>
 <target name="压缩dataedit.js">
  <java jar="${lib}/yui/yuicompressor-2.4.6.jar" fork="true">
            <arg line="--type js --charset utf-8 ${map_function_js}/dataedit.js -o ${build}/dataedit-min.js"/>          
  </java>
 </target>
 <target name="压缩ISuggest.js">
   <java jar="${lib}/yui/yuicompressor-2.4.6.jar" fork="true">
       <arg line="--type js --charset utf-8 ${map_function_js}/ISuggest.js -o ${build}/ISuggest-min.js"/>          
   </java>
 </target>
     <target name="清除build目录" depends="开始压缩">
          <delete dir="${build}"/>
  </target>
 <target name="复制压缩js文件">
      <copy todir="${map_function_js}">
         <fileset dir="${build}">
                   <include name="**.js"/>
            </fileset>
      </copy>
 </target>