var jsonStr = {'clusterNum':2,'iterationNum':3,'runTimes':4};
    $.ajax({
      type: "post",
      //http://172.22.12.135:9000/Json.json
      url: "/LSHome/LSHome",
      dataType : 'json',
      data : jsonStr,
      success: function(data,textStatus){
        if(textStatus=="success"){ 
          alert("創(chuàng)建任務操作成功"+data);      
        }        
      },
      error: function(xhr,status,errMsg){
        alert("創(chuàng)建任務操作失敗!");
      }
    });

<servlet>
   <servlet-name>LSHomeServlet</servlet-name>
   <servlet-class>com.ys.servlet.LSHomeServlet</servlet-class>
 </servlet>
 <servlet-mapping>
   <servlet-name>LSHomeServlet</servlet-name>
 <url-pattern>/LSHome</url-pattern>

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    //聚類數(shù)量
    String clusterNum = request.getParameter("clusterNum");
    //迭代次數(shù)
    String iterationNum = request.getParameter("iterationNum");
    //運行次數(shù)
    String runTimes = request.getParameter("runTimes");
    System.out.println("聚類數(shù)量為："+clusterNum+"---迭代次數(shù):"+iterationNum+"---運行次數(shù):"+runTimes);
    PrintWriter out = response.getWriter();      
    out.write("success");
    out.close();  
  }

xhr = Object {readyState: 4, responseText: "success", status: 200, statusText: "OK"}

 PrintWriter out = response.getWriter();
String jsonStr = "{\"success\":\"OK\"}";
 out.write(jsonStr);