基本规范
#####Object转JSON字符串:
String jsonStr = JSONObject.toJSONString(object);
#####JSON字符串转JSONObject:
JSONObject jsonObject = JSONObjcet.parseObject(jsonStr);
#####JSON字符串转Object对象
T t = JSON.parseObject(jsonStr,T.class);
#####将无泛型集合转为指定类型集合
String jsonString = JSONObject.toJSONString(list);
List<T> list = JSON.parseArray(jsonString,T.class);
-----注:JSON字符串是有格式要求的,必须为键值对形式,不是任意的字符串。-----
原文链接:https://blog.csdn.net/qq_29468573/article/details/82190005
在springboot中使用
@ResponseBody@RequestMapping(value = "/deleteUser", method = RequestMethod.POST)public CommonResponse deleteUser(HttpServletRequest request) {//将json字符串解析成JSONObject 对象JSONObject jsonObject = JSONObject.parseObject(request);//获取json里面的数据Integer id = jsonObject.getInteger("id");Integer companyId = jsonObject.getInteger("companyId");//再进行下一步处理}
测试示例
引用于 https://www.jianshu.com/p/a63b57a766c9
package test;import java.util.Iterator;import org.junit.Test;import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;public class FastJsonDemo {@Testpublic void testFastJson() {// json格式的字符串String jsonStr = "{\r\n" + "\"name\":\"jarWorker\",\r\n" + "\"sex\":\"男\",\r\n" + "\"age\":26,\r\n"+ "\"love\":[{\"hobby\":\"足球\",\"color\":\"White\"},{\"hobby\":\"篮球\",\"color\":\"Brown\"},{\"hobby\":\"简书\",\"color\":\"Yellow\"}],\r\n"+ "\"goodAt\":\"Java\"\r\n" + "}";Object jsonObj = JSON.toJSON(jsonStr);System.out.println("toJSON>>>" + jsonObj);System.out.println("——————————————————————————————————");Object jsonParse = JSON.parse(jsonStr);System.out.println("parse>>>" + jsonParse);System.out.println("——————————————————————————————————");String jsonString = JSON.toJSONString(jsonStr);System.out.println("jsonString>>>" + jsonString);System.out.println("——————————————————————————————————");JSONObject jsonObject = JSON.parseObject(jsonStr);// json对象String name = jsonObject.getString("name");String sex = jsonObject.getString("sex");String age = jsonObject.getString("age");String goodAt = jsonObject.getString("goodAt");System.out.println("name====" + name);System.out.println("sex====" + sex);System.out.println("age====" + age);System.out.println("goodAt====" + goodAt);String love = jsonObject.getString("love");JSONArray jsonArray = JSON.parseArray(love);// json数组对象String ArrayStr=JSONArray.toJSONString(jsonArray);System.out.println("ArrayStr====" + ArrayStr);System.out.println("——————————————————————————————————");int count = 0;// 测试用Iterator<Object> it = jsonArray.iterator();// 使用Iterator迭代器while (it.hasNext()) {// 遍历数组JSONObject arrayObj = (JSONObject) it.next();// JSONArray中是很多个JSONObject对象String hobby = arrayObj.getString("hobby");String color = arrayObj.getString("color");count++;System.out.println("hobby>>>" + hobby);System.out.println("color>>>" + color);System.out.println("------------------------------------");}System.out.println("数组中的JSONObject个数:" + count);}
}