如何使用一个ajax请求从java servlet返回多个json对象 [英] how to return multiple json objects from java servlet using one ajax request

问题描述

我正在使用jsp和servlet构建Web应用程序，我从jsp发送ajax请求，我想从servlet返回两个json对象.我尝试执行以下操作，但是代码不起作用.

I am building web application using jsp and servlet, I send ajax request from jsp and I want to return two json objects from servlet. I tried to do the following but the code did not work.

//在jquery中，我写了这段代码

// in jquery I wrote this code

        var id = $(this).attr('id');

        var paramenters = {"param":id};

        $.getJSON("MyServlet", paramenters, function (data1,data2){

            $("h3#name").text(data1["name"]);

            $("span#level").text(data1["level"]);

            $("span#college").text(data2["college"]);

            $("span#department").text(data2["department"]);

        });

//在我编写此代码的servlet中

// in the servlet I wrote this code

    String json1 = new Gson().toJson(object1);

    String json2 = new Gson().toJson(object2);

    response.setContentType("application/json");

    response.setCharacterEncoding("utf-8");

    response.getWriter().write(json1);

    response.getWriter().write(json2);

有人可以帮我吗?

推荐答案

您应该这样做:

服务器端:

String json1 = new Gson().toJson(object1); 
String json2 = new Gson().toJson(object2); 
response.setContentType("application/json"); 
response.setCharacterEncoding("utf-8"); 
String bothJson = "["+json1+","+json2+"]"; //Put both objects in an array of 2 elements
response.getWriter().write(bothJson);

客户端:

$.getJSON("MyServlet", paramenters, function (data){ 
   var data1=data[0], data2=data[1]; //We get both data1 and data2 from the array
   $("h3#name").text(data1["name"]); 
   $("span#level").text(data1["level"]); 
   $("span#college").text(data2["college"]); 
   $("span#department").text(data2["department"]);
});

希望这会有所帮助.干杯

Hope this helps. Cheers

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