fastjson解析json串

1、代码如下：

package core.test;


import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;


public class Test {
	
	public static void main(String[] args) {
		//接口传过来的字符串如下：{"key":[{"tagName":"李四","value":"0.01","timeStamp":"2019-07-26 09:55:27"},{"tagName":"张三","value":"12.2","timeStamp":"2019-07-26 09:55:27"}]}
		String dataByTagAndDuration="{\"key\":[{\"tagName\":\"李四\",\"value\":\"0.01\",\"timeStamp\":\"2019-07-26 09:55:27\"},{\"tagName\":\"张三\",\"value\":\"12.2\",\"timeStamp\":\"2019-07-26 09:55:27\"}]}";
		JSONObject root = new JSONObject().parseObject(dataByTagAndDuration);// 将json格式的字符串转换成json
		JSONArray dataArr = root.getJSONArray("key");//根据json对象中数组的名字解析出其所对应的值
		List list = new ArrayList();
		//对解析出的数组进行遍历，获取所有的点位值
		for (int i = 0; i