使用FastJson从json串中根据key获取value

 import com.alibaba.fastjson.JSONObject;

 /**
  * Created by SYJ on 2017/9/13.
  */
 public class MainTest {
     public static void main(String[] args) {
         String json = "{\"code\":0,\"message\":\"没有查询到数据\",\"data\":null,\"taskId\":\"0-bb03193f-ed1f-4d32-8351-6538d329b26e\",\"time\":\"2017-09-2210:11:30\"}";
         JSONObject obj = JSONObject.parseObject(json);
         Integer code = obj.getInteger("code");
         String message = obj.getString("message");
         String taskId = obj.getString("taskId");

         System.out.println("code:" + code + ", message:" + message + ", taskId:" + taskId);
     }
 }