json转换成Map

1.如果转换的是Map、或者是简单的对象

package com.gc.action;

import java.util.Map;

import net.sf.json.JSONObject;

/**
 * 1.json string 转换为 map
 * 2.json string 转换为 对象
 * @author zhangtengda * */ public class JsonUtils { public static void main(String[] args) { String jsonStr = "{\"status\":\"0\",\"data\":{\"name\":\"tom\",\"age\":18}}"; // ================================ // 1.如果是拿出来最外层的 map Map<Object, Object> result = jsonToMap(jsonStr); System.out.println(result.get("status")); System.out.println(result.get("data")); // 2.如果进步一拿到内层的 map Map<Object, Object> data = jsonToMap(result.get("data")); System.out.println(data.get("name")); System.out.println(data.get("age")); // ================================ Long beginTime = System.currentTimeMillis(); // 3.转换为对象 String personStr = "{\"id\":12,\"name\":\"mary\"}"; Person person = jsonToBean(personStr, Person.class); System.out.println(person); System.out.println("耗时：" +( System.currentTimeMillis() - beginTime)); } /** * json string 转换为 map 对象 * @param jsonObj * @return */ public static Map<Object, Object> jsonToMap(Object jsonObj) { JSONObject jsonObject = JSONObject.fromObject(jsonObj); Map<Object, Object> map = (Map)jsonObject; return map; } /**json string 转换为 对象 * @param jsonObj * @param type * @return */ public static <T> T jsonToBean(Object jsonObj, Class<T> type) { JSONObject jsonObject = JSONObject.fromObject(jsonObj); T obj =(T)JSONObject.toBean(jsonObject, type); return obj; } }