关于java:00025工具类CommonJsonUtilsjson-与-bean的转换

package com.xmdishi.fmp.utils;import net.sf.json.util.JSONUtils;import org.apache.commons.lang3.StringUtils;import java.util.*;/** * json 与 bean的转换 * chenjianquan * 2019/1/14 */public class CommonJsonUtils<T> {    /**     * json转为List<T>     * @author cjianquan     * @date 2020/1/19     * @param [json, clazz]     * @return java.util.List<T>     */    public List<T> toBeanList(String json,Class<T> clazz){        //调用DateMorpherEx，defaultValue为null        JSONUtils.getMorpherRegistry().registerMorpher(new DateMorpherEx(new String[] { "yyyy-MM-dd HH:mm:ss","yyyy-MM-dd" }, (Date) null));        net.sf.json.JSONArray jsonArr = net.sf.json.JSONArray.fromObject(json);        List<T> list = new ArrayList<T>();        for (int i = 0; i < jsonArr.size(); i++) {            Object obj = jsonArr.get(i);            T rec = (T)net.sf.json.JSONObject.toBean(net.sf.json.JSONObject.fromObject(obj),clazz);            list.add(rec);        }        return list;    }    /**     * json 里蕴含这 key 的子数组，转换为List<T>     * @author cjianquan     * @date 2020/1/19     * @param [json, key, clazz]     * @return java.util.List<T>     */    public List<T> toBeanListByKey(String json,String key,Class<T> clazz){        //调用DateMorpherEx，defaultValue为null        JSONUtils.getMorpherRegistry().registerMorpher(new DateMorpherEx(new String[] { "yyyy-MM-dd HH:mm:ss","yyyy-MM-dd" }, (Date) null));        List<Map<String,Object>> mapList = getMapListByKey(json,key);        net.sf.json.JSONArray jsonArr = net.sf.json.JSONArray.fromObject(mapList);        List<T> list = new ArrayList<T>();        for (int i = 0; i < jsonArr.size(); i++) {            Object obj = jsonArr.get(i);            T rec = (T)net.sf.json.JSONObject.toBean(net.sf.json.JSONObject.fromObject(obj),clazz);            list.add(rec);        }        return list;    }    /**     * 将json转为List<Map<String,Object>>     * @author cjianquan     * @date 2020/1/19     * @param [json]     * @return java.util.List<java.util.Map<java.lang.String,java.lang.Object>>     */    public List<Map<String,Object>> toMapList(String json){        net.sf.json.JSONArray jsonArr = net.sf.json.JSONArray.fromObject(json);        List<Map<String,Object>> list = new ArrayList<Map<String,Object>>();        for (int i = 0; i < jsonArr.size(); i++) {            net.sf.json.JSONObject obj = net.sf.json.JSONObject.fromObject(jsonArr.get(i));            Iterator iterable= obj.keys();            Map<String,Object> map = new HashMap<String,Object>();            while(iterable.hasNext()){                Object key = iterable.next();                map.put(""+key,obj.get(key));            }            list.add(map);        }        return list;    }    /**     * json 里蕴含这 key 的子数组，转换为List<Map<String,Object>>     * @author cjianquan     * @date 2020/1/19     * @param [json, key]     * @return java.util.List<java.util.Map<java.lang.String,java.lang.Object>>     */    public List<Map<String,Object>> getMapListByKey(String json,String key){        List<Map<String,Object>> list = new ArrayList<Map<String,Object>>();        net.sf.json.JSONObject params = net.sf.json.JSONObject.fromObject(json);        Object objList = params.get(key);        list = toMapList(objList.toString());        return list;    }    /**     * 获取json的 指定key 的 Map<String,Object>     * @author cjianquan     * @date 2020/1/19     * @param [json, key]     * @return java.util.Map<java.lang.String,java.lang.Object>     */    public Map<String,Object> getMapByKey(String json,String key){        Map<String,Object> map = new HashMap<String,Object>();        net.sf.json.JSONObject params = net.sf.json.JSONObject.fromObject(json);        Object objMap = params.get(key);        map = net.sf.json.JSONObject.fromObject(objMap);        return map;    }    /**     * 获取json的 指定key 的 Map<String,Object>,并转为 T     * @author cjianquan     * @date 2020/1/19     * @param [json, key, clazz]     * @return T     */    public T toBeanByKey(String json, String key, Class<T> clazz) {        JSONUtils.getMorpherRegistry().registerMorpher(new DateMorpherEx(new String[] { "yyyy-MM-dd HH:mm:ss","yyyy-MM-dd" }, (Date) null));        net.sf.json.JSONArray jsonArr = net.sf.json.JSONArray.fromObject(json);        Map<String,Object> map  = getMapByKey(json,key);        T rec = (T)net.sf.json.JSONObject.toBean(net.sf.json.JSONObject.fromObject(map),clazz);        return rec;    }    /**     *  获取json的 指定key 的 json string     * @author cjianquan     * @date 2020/1/19     * @param [json, key]     * @return java.lang.String     */    public String getStringByKey(String json,String key){        net.sf.json.JSONObject params = net.sf.json.JSONObject.fromObject(json);        Object result = params.get(key);        return ""+result;    }    public T toBean(String json, Class<T> clazz){        JSONUtils.getMorpherRegistry().registerMorpher(new DateMorpherEx(new String[] { "yyyy-MM-dd HH:mm:ss","yyyy-MM-dd" }, (Date) null));        T rec = (T)net.sf.json.JSONObject.toBean(net.sf.json.JSONObject.fromObject(json),clazz);        return rec;    }}