如何将Json对象从ajax传递给spring mvc控制器？

Question

我正在使用SpringMVC,我将数据从ajax传递给控制器​​,但我的控制器中有空值,请检查下面的代码

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
       }

任何人帮助我

Answer 1

嘿,喜欢以下代码.

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Search类将如下

class Search {
    private String pName;
    private String lName;

    // getter and setters for above variables
}

此类的优点在于,将来您可以根据需要向此类添加更多变量.
例如.如果要实现排序功能.

Answer 2

如果你不想创建一个类,你可以使用这个方法,你可以直接发送没有字符串化的JSON.使用默认内容类型.只需使用@RequestParam而不是@RequestBody. @RequestParam名称必须与中的相同json.

Ajax Call

function searchText() {
    var search = {
    "pName" : "bhanu",
    "lName" :"prasad"
    }
    $.ajax({
    type: "POST",
    /*contentType : 'application/json; charset=utf-8',*/ //use Default contentType
    dataType : 'json',
    url: "/gDirecotry/ajax/searchUserProfiles.htm",
    data: search, // Note it is important without stringifying
    success :function(result) {
    // do what ever you want with data
    }
    });

弹簧控制器

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

   public  @ResponseBody String  getSearchUserProfiles(@RequestParam String pName, @RequestParam String lName) {
       String pNameParameter = pName;
       String lNameParameter = lName;

       // your logic next
   }