ant编译程序需要应用第三方jar包 方案一：Eclipse中  Window > Preferences > Ant > Runtime > Classpath, select “Global Entries” ,Add external Jar 方案二：将依赖jar包放入classpath文件夹(与src同级)，build.xml如此写 <!-- 定义classpath --> <path id="master-classpath"> <fileset file="${classpath.dir}/*.jar" /> </path> ... <javac ...> <classpath refid="master-classpath" /> </javac> 或者 <classpath> <pathelement path="${classpath}"/> <fileset dir="lib"> <include name="**/*.jar"/> </fileset> <pathelement location="classes"/> <dirset dir="${build.dir}"> <include name="apps/**/classes"/> <exclude name="apps/**/*Test*"/> </dirset> <filelist refid="third-party_jars"/> </classpath>