Javaweb two ways to return JSON data

Javaweb two ways to return JSON data creationtime--2018 July 25 17:20 author:marydon1. Description

　　Due to the general situation, the browser (front-end) to send the request, the server (background) response to JSON data, so here with JS to explain;

　　A server sends the request to the B server, and receives its return JSON data, see at the end of the article recommendation, here no longer repeat!

2. The server returns JSON data

Way one: Return JSON-formatted data (JSON object)

Sets the return JSON data and specifies the character set Response.setcontenttype ("APPLICATION/JSON;CHARSET=UTF-8;"); /Set return data jsonobject Jo = new Jsonobject () jo.put ("name", "Marydon");//Return Data Response.getwriter (). Print (Jo);

Mode two: Return JSON format string (JSON string)

Sets the return character set Response.setcontenttype ("Charset=utf-8"); String result = "{\" name\ ": \" marydon\ "}";//Returns Data Response.getwriter (). Print (result);

3. The client receives and processes the JSON data

For the first return format

$.get (); $.ajax (); $.post (); $.getjson () These 4 ways do not need to do extra processing, directly can take value.

$.post (BaseUrl + "/test.do", function (Result) {    alert (result.name);//Marydon});

For the second return format

$.get (); $.ajax (); $.post (); These three methods need to deal with the data in order to get the value;

$.get (BaseUrl + "/test.do", function (Result) {    //JSON string-->json object    result = eval (' (' + result + ') ');    alert (result.name);//Marydon});

$.getjson (); This method directly can be value, no further processing.

$.getjson (BaseUrl + "/test.do", function (Result) {    alert (result.name);//Marydon});

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Javaweb two ways to return JSON data