如何将 Json 对象从 ajax 传递到 spring mvc 控制器?

问题描述

我正在研究 SpringMVC，我正在将数据从 ajax 传递到控制器，但我的控制器中出现空值，请检查下面的代码

I am working on SpringMVC, I am passing data from ajax to controller but i got null value in my controller please check my code below

function searchText()
{
   var sendData = {
    "pName" : "bhanu",
     "lName" :"prasad"
   }
  $.ajax({
type: "POST",
 url: "/gDirecotry/ajax/searchUserProfiles.htm,
    async: true,
    data:sendData,
    success :function(result)
    {
    }
 }

MyControllerCode

         RequestMapping(value="/gDirecotry/ajax/searchUserProfiles.htm",method=RequestMethod.POST)

       public  @ResponseBody String  getSearchUserProfiles(HttpServletRequest request)
       {
         String pName = request.getParameter("pName");
         //here I got null value
       }

谁来帮帮我

推荐答案

嘿，享受下面的代码.

Javascript AJAX 调用

function searchText() {
   var search = {
      "pName" : "bhanu",
      "lName" :"prasad"
   }

   $.ajax({
       type: "POST",
       contentType : 'application/json; charset=utf-8',
       dataType : 'json',
       url: "/gDirecotry/ajax/searchUserProfiles.html",
       data: JSON.stringify(search), // Note it is important
       success :function(result) {
       // do what ever you want with data
       }
   });
}

Spring 控制器代码

RequestMapping(value="/gDirecotry/ajax/searchUserProfiles.htm",method=RequestMethod.POST)

public  @ResponseBody String  getSearchUserProfiles(@RequestBody Search search, HttpServletRequest request) {
    String pName = search.getPName();
    String lName = search.getLName();

    // your logic next
}

以下搜索类将如下

class Search {
    private String pName;
    private String lName;

    // getter and setters for above variables
}

这个类的优点是，以后你可以根据需要向这个类添加更多变量.
例如，如果您想实现排序功能.

Advantage of this class is that, in future you can add more variables to this class if needed.
Eg. if you want to implement sort functionality.

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