json格式转为 ?map 和 bean

package com.xxx.qrcode;import java.io.IOException;import java.util.HashMap;import java.util.Iterator;import java.util.Map;import org.codehaus.jackson.map.ObjectMapper;import net.sf.json.JSONException;import net.sf.json.JSONObject;/** * ?* @ClassName:JSONUtils * @Description:TODO(这里用一句话描述这个类的作用 ???JSON工具类) * @author: ZHOUPAN * @date 2018年10月24日 上午11:58:29 * * @Copyright: 2018 www.xxx.com Inc. All rights reserved. */public class JSONUtils { ????private static ObjectMapper mapper; ???/** ????* 获取ObjectMapper实例 ????* @param createNew 方式：true，新实例；false,存在的mapper实例 ????* @return ????*/ ???public static synchronized ObjectMapper getMapperInstance(boolean createNew) { ???????if (createNew) { ???????????return new ObjectMapper(); ???????} else if (mapper == null) { ???????????mapper = new ObjectMapper(); ???????} ???????return mapper; ???} ???/** ????* 将java对象转换成json字符串 ????* @param obj 准备转换的对象 ????* @return json字符串 ????* @throws Exception ????*/ ???public static String beanToJson(Object obj) throws IOException { ???????ObjectMapper objectMapper = getMapperInstance(false); ???????String json =objectMapper.writeValueAsString(obj); ???????return json; ???} ???/** ????* 将java对象转换成json字符串 ????* @param obj 准备转换的对象 ????* @param createNew ObjectMapper实例方式:true，新实例;false,存在的mapper实例 ????* @return json字符串 ????* @throws Exception ????*/ ???public static String beanToJson(Object obj,Boolean createNew) throws IOException { ???????ObjectMapper objectMapper = getMapperInstance(createNew); ???????String json =objectMapper.writeValueAsString(obj); ???????return json; ???} ???????/*** ????* ?????* @Title: jsonToMap ???????* @Description: TODO(将JSON字符串转为Map) ?????* @author: ZHOUPAN ??????* @param: @param jsonString ????* ????????????????????????????????JSON字符串 ????* @param: @throws JSONException ??????????* ????????????????????????????????异常处理 ????* @return: Map<String,Object> ??????????* ????????????????????????????????返回Map ????* @throws ????*/ ???public static Map<String, Object> jsonToMap(String jsonString) throws JSONException { ???????JSONObject jsonObject = JSONObject.fromObject(jsonString); ???????Map<String, Object> result = new HashMap<String, Object>(); ???????Iterator<?> iterator = jsonObject.keys(); ???????String key = null; ???????String value = null; ???????while (iterator.hasNext()) { ???????????key = (String) iterator.next(); ???????????value = jsonObject.getString(key); ???????????result.put(key, value); ???????} ???????return result; ???} ???????/** ????* ?????* @Title: jsonToBean ???????* @Description: TODO(将JSON字符创转为Bean) ?????* @author: ZHOUPAN ??????* @param: @param jsonString ????* @param: @param model ????* @param: @return ????* @param: @throws JSONException ??????????* @return: T ??????????* @throws ????*/ ???@SuppressWarnings({ "static-access", "unchecked" }) ???public static <T> T jsonToBean(String jsonString, Class<T> model) throws JSONException { ???????JSONObject jsonObject = JSONObject.fromObject(jsonString); ???????Object object = jsonObject.toBean(jsonObject, model); ???????return (T) object; ???}}