导入json相应的jar包
    commons-beanutils-1.7.0.jar,commons-collections-3.2.jar,commons-lang-2.4.jar
   commons-logging-1.1.jar,ezmorph-1.0.6.jar,json-lib-2.2.3-jdk15.jar
   jsonplugin-0[1].30.jar这是我的json相应的jar

    struts.xml

    <package name="search" namespace="/oe" extends="json-default">
       <action name="SearchProduct" class="SearchProductAction" method="SearchProduct">
            <result type="json">
               <param name="root">result</param>
            </result>
      </action>
    </package>
Action
    public String result;
    写对应的set和get方法

     response.setCharacterEncoding("utf-8");
    JSONArray jsonArray = JSONArray.fromObject(list);
    result = jsonArray.toString();
前台jsp
    success: function(data){
              var data=eval("("+data+")");
         自己对data进行解析    
    }