json字符串转map、json数组演示

公司项目用的IBM封装的json解析，此处采用阿里的fastjson进行演示，代码如下：

package com.alphajuns.test;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import org.junit.Test;

import java.util.Map;

/**
 * @ClassName JsonToMapTest
 * @Description
 * @Author AlphaJunS
 * @Date 2019/10/23 22:34
 * @Version V1.0
 **/
public class JsonToMapTest {

    /**
     * @description json字符串转json数组
     * @author AlphaJunS
     * @date 2019/10/23
     * @param []
     * @return void
     */
    @Test
    public void run3() {
        // json字符串
        String jsonStr = "[{"ID":"SX5-1001432","PROCESSID":"OP2080"}, "
                + "{"ID":"SX5-1601110","PROCESSID":"OP2150"}, "
                + "{"ID":"X03004-1023111","PROCESSID":"OP1140"}, "
                + "{"ID":"X03004-1003012","PROCESSID":"GOP260"}, "
                + "{"ID":"7903075118","PROCESSID":"GOP260"},{"ID":"13MA-11011"}]";
        JSONArray jsonArray = JSON.parseArray(jsonStr);
        // 遍历打印
        printMethod(jsonArray);
    }

    /**
     * @description
     * @author AlphaJunS
     * @date 2019/10/23
     * @param []
     * @return void
     */
    @Test
    public void run2() {
        // json字符串
        String jsonStr = "{"OPERATION":[{"ID":"SX5-1001432","PROCESSID":"OP2080"}, "
                + "{"ID":"SX5-1601110","PROCESSID":"OP2150"}, "
                + "{"ID":"X03004-1023111","PROCESSID":"OP1140"}, "
                + "{"ID":"X03004-1003012","PROCESSID":"GOP260"}, "
                + "{"ID":"7903075118","PROCESSID":"GOP260"},{"ID":"13MA-11011"}]}";

        // json转map
        Map map = (Map) JSON.parse(jsonStr);
        System.out.println("map的value类型：" + map.get("OPERATION").getClass());
        JSONArray jsonArray = (JSONArray) map.get("OPERATION");
        printMethod(jsonArray);
    }

    /**
     * @description json字符串转map
     * @author AlphaJunS
     * @date 2019/10/23
     * @param []
     * @return void
     */
    @Test
    public void run1() {
        String jsonStr= "{"OPERATION":{"ID":"SX5-1001432","PROCESSID":"OP2080"}}";
        // json转map
        Map map = (Map) JSON.parse(jsonStr);
        System.out.println("map的value类型：" + map.get("OPERATION").getClass());
        JSONObject jsonObject = (JSONObject) map.get("OPERATION");
        System.out.println("ID:" + jsonObject.get("ID") + ",PROCESSID:" + jsonObject.get("PROCESSID"));
    }

    /**
     * @description 遍历json数组打印
     * @author AlphaJunS
     * @date 2019/10/23
     * @param [jsonArray]
     * @return void
     */
    public void printMethod(JSONArray jsonArray) {
        // 遍历json数组
        for (int i = 0; i < jsonArray.size(); i++) {
            JSONObject jsonObject = (JSONObject) jsonArray.get(i);
            System.out.println("第" + (i + 1) + "个对象：");
            System.out.println("ID:" + jsonObject.get("ID") + ",PROCESSID:" + jsonObject.get("PROCESSID"));
        }
    }
}