前端代码：
$.ajax({
type:'post',
url:'http://171125dv96.iask.in/weiqing_manage/Package.json',
dataType:'jsonp',
jsonp:'callback',
data:{phone:18865920808, type:'0'},
jsonpCallback:"successCallback",
success:function(data){
alert("成功！success");
alert(data.name);
},
error:function(XMLHttpRequest, textStatus, errorThrown){
alert("失败！error");
alert(XMLHttpRequest.status);
alert(XMLHttpRequest.readyState);
alert(textStatus);
}
});
/*
*回调名successCallback可以自定义，必须和后台响应的名
*对应
*
*如果XMLHttpRequest.status打印值为200
*XMLHttpRequest.readyState为4
*textStatus为parsererror
*
*parsererror：解析错误
*由parsererror可以看出应该就是后台返回的数据格式有问题
*了
*/后台代码:
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/json;charset=UTF-8");
request.setCharacterEncoding("UTF-8");
PrintWriter out = response.getWriter();
String TELPHONE = request.getParameter("phone");
String TYPE = request.getParameter("type");
System.out.println("------------------------------------------");
System.out.println("telphone: " + TELPHONE);
System.out.println("type: " + TYPE);
try {
Package p = new Package();
Gson gson = new Gson();
String st = " 手机号："+TELPHONE+",type:"+TYPE;
System.out.println("111111111111111111111");
p.setName(st);
System.out.println(" 测试： " + gson.toJson(p));
out.print("successCallback(" + gson.toJson(p) + ")");//尤其注意这里返回的数据格式： {"name":" 手机号：18865920808,type:0"}
/*
*因为Jsonp的返回类型：回调函数名+（+json+)
*
*/
} catch (Exception e) {
e.printStackTrace();
} finally {
out.flush();
out.close();
}
}