亲测SpringBoot参数传递及@RequestBody注解---踩过的坑及解决

//点击查询, 执行下面这个函数

$( "#searchByCriteria" ).click( function () {

      //var paramdata = $("#bck_qry_criteria_form").serializeJson();//serializeJson()是自定义的form 格式化为json函数

      var paramdata = {

          type:$( "#bck_type" ).val(),

          title:$( "#bck_title" ).val(),

          start:$( "#bck_start" ).val(),

          end:$( "#bck_end" ).val()

      };

      paramdata = JSON.stringify(paramdata);

      $.ajax({

          type: "post" ,

          data: paramdata,

          url: "/getNews" ,

          cache: false ,

          headers : { "Content-Type" : "application/json;charset=utf-8" },

          success: function (data) {

              var code = data.code;

              var t = data.t;

              if (code == 200){alert(JSON.stringify( "提交成功! 我们会尽快联系您!" ));}

              if (code == 500){alert(JSON.stringify(t));}

              //$("#input_phone").val("");//清空输入框

          }

      })

  });

@PostMapping (value = "/getNews" ,  consumes = "application/json" )

@ResponseBody

public PageInfo<NewsList> getNewsList( @RequestBody NewsParamsMap map){

     System.out.println( "这是正确的用法" );

     return null ;

}

public class NewsParamsMap {

     private Integer type;

     private String title;

     private Date start;

     private Date end;

    ...

    set get 方法

    ...

}

@RequestMapping ( "doThis" ) 

public String doThis(HttpServletRequest request, 

         @RequestParam ( "id" ) Long id, // 用户ID 

         @RequestParam ( "back_url" ) String back_url, // 回调地址          

         @RequestBody TestEntity json_data // json数据，对于java实体类 

){ //...

String add_url = "http://127.0.0.1:8080/test/doThis" ; 

    URL url = new URL(add_url); 

    HttpURLConnection connection = (HttpURLConnection)url.openConnection(); 

    connection.setDoInput( true ); 

    connection.setDoOutput( true ); 

    connection.setRequestMethod( "POST" ); 

    connection.setUseCaches( false ); 

    connection.setInstanceFollowRedirects( true ); 

    connection.setRequestProperty( "Content-Type" , "application/json" ); 

    connection.connect(); 

    DataOutputStream out = new DataOutputStream(connection.getOutputStream()); 

    JSONObject obj = new JSONObject(); 

    obj.put( "code" , - 1002 );      

    obj.put( "message" , "msg" ); 

    out.writeBytes(obj.toString()); 

    out.flush(); 

    out.close();