java - 如何将json中的响应发送到servlet中的树结构

Question

我是 servlet 的新手，我成功地使用 json-simple 包/jar 文件向客户端发送了 json 格式；并像这样导入它-

import org.json.simple.JSONObject;  

为了在 json 中获得响应，我有以下代码-

response.setContentType("application/json");
JSONObject obj = new JSONObject();
obj.put("name", "veshraj joshi");
obj.put("id",request.getParameter("id"));
obj.put("num", new Integer(100));
obj.put("balance", new Double(1000.21));
out.println(obj);

它的格式是这样的:

{"name":"veshraj joshi","id":"","num":"100","balance":"1000.21"}

并且工作正常，但我需要像-

这样的 json 格式

{ status:"ok",
  message:"record has been added successfully",
  data:{
        name:"veshraj joshi",
        email:"email@gmail.com",
        address:"kathmandu, Nepal"
     }
 }

并且不知道如何在 servlet 中实现这一点；

Answer 1

它在尝试使嵌套的 json 和新代码成为 - 时工作正常response.setContentType("application/json");

JSONObject obj = new JSONObject();
JSONObject obj1 = new JSONObject();
obj1.put("email",'email@gmail.com');
obj1.put("name", "veshraj joshi");
obj1.put("id",request.getParameter("id"));
obj1.put("num", new Integer(100));
obj1.put("balance", new Double(1000.21));
obj.put("status","ok");
obj.put("message","record has been added successfully");
obj.put("data",obj1);
out.println(obj);