function sendRequest() {
    $.ajax({
      url: "Hello",
      type: "GET",
      dataType: "txt",
      data: "name=zhangsan",
      complete: function(result){
        alert(result.responseText);
      }
    });
  }

function sendRequestByGet(){
    $.get("Hello","name=lisi",function(result){
      alert(result);
    });
  }

function sendRequestByPost(){
    $.post("Hello","name=wangwu",function(result){
      alert(result);
    });
  }

//load代码等效使用如下$get()方法
  /*
  $get(url, data, function(result){
        //将result数据填充到页面元素中
    $(“#h2”).html(result);  
  });
  */

  function load(){
    $("h2").load("Hello","name=hahaha");
  }

protected void doPost(HttpServletRequest req, HttpServletResponse resp)
      throws ServletException, IOException {
    String name=req.getParameter("name");
    resp.getWriter().print(name);
  }