java - 在java servlet中读取JSON

Question

我想在 servlet 中读取这个 json

{
    "text" : "ABC",
    "msg" : "9551667858",
    "all":[
        {"name":"one"},
        {"name":"two"}
        ],
    "obj":{
        "firstname":"John",
        "lastname":"Doe"
    }
}

现在我想将此值分别获取到字符串、jsonarray 和 json 对象

我就是这样做的

PrintWriter out = response.getWriter();
        try {
            String newObj = request.getParameter("text");;
            JSONObject jObj    = new JSONObject(request.getParameter("obj"));
            JSONArray jArray=new JSONArray(request.getParameter("all"));

out.print(newObj);

        } catch (Exception e) {
            e.printStackTrace();
            out.write(e.toString());
        }
        response.setContentType("application/json");

Answer 1

您的代码部分正确。String newObj = request.getParameter("jsondata"); 是正确的。然后，您必须从 newObj 字符串创建 jObj。

String jsonString = <your json String>
JSONObject jsonObj = new JSONObject(jsonString);
JSONObject allObj = jsonObj.getJSONObject("obj");
JSONArray allArray = jsonObj.getJSONArray("all");