获取Json字符串中的key和value

时间:2021-12-06 00:07:54

获取Json字符串中的key和value

在web项目中经常会用到json数据(如:struts2处理请求返回json数据给jsp解析),因此,JSONObject对象是必备的,这时就需要引入相关的jar包了。

json所需要的jar包如下:

json-lib-2.3-jdk15.jar

json所依赖的jar如下:

commons-beanutils-1.8.0.jar

commons-collections-3.2.1.jar

commons-lang-2.4.jar

commons-logging-1.1.jar

ezmorph-1.0.6.jar 

java实现代码:

import net.sf.json.JSONObject;
import com.google.gson.Gson;
import com.nenglong.k12.oos.module.po.resource.Exercise; String res = "{"_index":"k12oos","_type":"exercise","_id":"-0WtGG1FhQSmqIQhKU8pMg","_version":2,"found":true,"_source":{"code":"1009430255","stageId":"go2Leq1wj5y8vuA_5w7Azw","gradeId":"26vYkWDVjhivNno6Kbz7ZM","courseStageId":"PcjbvAQ8h9KaTfZ8q6UZcw","exerciseType":{"name":"张三","id":"-0WtGG1FhQSmqIQhKU8pMg"}}"; JSONObject jsonObject = new JSONObject();
jsonObject = jsonObject.fromObject(res);//将String转为JSON数据
String exerciseStr = jsonObject.getString("_source");//获取key为"_source"的值。 Gson gson = new Gson();
Exercise exercise = gson.fromJson(exerciseStr, Exercise.class);