ANT 编译工程异常“编码 GBK 的不可映射字符”警告

<?xml version="1.0" encoding="UTF-8"?><project name="HikWSMultiSocket" default="dist" basedir=".">    <description>        simple example build file    </description>    <!-- set global properties for this build -->    <property name="src" location="src"/>    <property name="build" location="build"/>    <property name="dist"  location="dist"/>    <target name="init">        <!-- Create the time stamp -->        <tstamp/>        <!-- Create the build directory structure used by compile -->        <mkdir dir="${build}"/>    </target>    <target name="compile" depends="init"        description="compile the source " >        <!-- Compile the java code from ${src} into ${build} -->        <javac srcdir="${src}" destdir="${build}"/>    </target>    <target name="dist" depends="compile"        description="generate the distribution" >        <!-- Create the distribution directory -->        <mkdir dir="${dist}/lib"/>        <!-- Put everything in ${build} into the MyProject-${DSTAMP}.jar file -->        <jar jarfile="${dist}/lib/MyProject-${DSTAMP}.jar" basedir="${build}" encoding="UTF-8"/>    </target>    <target name="clean"        description="clean up" >        <!-- Delete the ${build} and ${dist} directory trees -->        <delete dir="${build}"/>        <delete dir="${dist}"/>    </target></project>