If you use Apache Ant to automate your build process, most of the cases this will be a very useful thing to remember. If you want to to generate a Java code using WSDL file this is the way to do it. To do it you need to have Apache CXF as a dependency. Following ant file will gerate a Java code using a given WSDL file.
<project default="compile-all">
<property name="classes" value="$classes"/>
<property name="genCode" value="$genCode"/>
<property name="dependencies" value="$dependencies"/>
<path id="class.path">
<fileset dir="${dependencies}">
<include name="**"/>
</fileset>
</path>
<target name="init">
<mkdir dir="${classes}"/>
<mkdir dir="${genCode}"/>
</target>
<target name="cxfWSDLToJava" depends ="init ">
<echo message="Genarating WSDLToJava"/>
<java classname="org.apache.cxf.tools.wsdlto.WSDLToJava" fork="true">
<arg value="-client"/>
<arg value="-d"/>
<arg value="${genCode}"/>
<arg value="-b"/>
<arg value="./async_binding.xml"/>
<arg value="./hello_world_async.wsdl"/>
<classpath>
<path refid="class.path"/>
</classpath>
</java>
</target>
<target name="compile-all" depends="cxfWSDLToJava">
<javac debug="on" destdir="${classes}">
<src path="${genCode}"/>
<classpath refid="class.path"/>
</javac>
</target>
</project>
This task will do WSDL2Java conversion. You need to have a dependencies directory created with the necessary cxf jars. You can find them here, http://cxf.apache.org/download.html Also if you need other dependencies to compile you have to put those jars there.Also for further customization please visit this url http://cxf.apache.org/docs/wsdl-to-java.html 