fastjson场景

json转java对象

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// 将Json字符串通过fastjson转为JSONObject对象 JSONObject jsonObject = JSONObject.parseObject(userJson); // 将JSONObject对象转为Object实体对象 UserBean user = JSON.toJavaObject(jsonObject, UserBean.class);

java转jsonobject对象

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1	JSONObject jsonObject = (JSONObject) JSONObject.toJSON(new UserBean());

list转json

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1 2	List list = new ArrayList(16); JSONObject result = JSONObject.parseObject(JSONObject.toJSONString(list));

对象与String互相转换

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//将对象转换成为字符串 String strUserInfo = JSON.toJSONString(UserInfo); //字符串转换成为对象 InfoDo UserInfo = JSON.parseObject(strUserInfo, UserInfo.class);

对象转list

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//将对象集合转换成为字符串 String users = JSON.toJSONString(users); //将字符串转换成为对象集合  List userList = JSON.parseArray(userStr, User.class);

String与json互相转换

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//String 转 Json对象 JSONObject jsonObject = JSONObject.parseObject(str); //json对象转string String jsonString = jsonObject.toJSONString();// jsonObject为JSON对象

map与String互相转换

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//字符串转jsonObject JSONObject  jsonObject = JSONObject.parseObject(str); //json对象转Map  Map<String,Object> map = (Map<String,Object>)jsonObject;  //map转字符串 String jsonString = JSON.toJSONString(map);

map转json

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//map转json对象 Map<String,Object> map = new HashMap<>(); map.put("age", 23); map.put("name", "Jacky"); JSONObject json = new JSONObject(map); //json对象转Map Map<String,Object> map = (Map<String,Object>)jsonObject;

map<String,Object>转list<T>

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/** * 将List<map>转换成List<java对象> * */ public static <T> List<T> getListObject(List<Map<String,Object>> list,Class<T> cls){      List<T> paramList = new ArrayList<>();      if (CollectionUtils.isNotEmpty(list)){         for (Map<String, Object> map : list) {              paramList.add(this.parseMapObject(map,cls));                }         }         return paramList; } /** * 将map转换成java对象 * */ public static <T> T parseMapObject(Map<String,Object> paramMap, Class<T> cls) {     return JSONObject.parseObject(JSONObject.toJSONString(paramMap),cls); }

　String转jsonArray

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String review = "[ { "name":"人员A", "review_grades":{ "name":"优秀", "parent":"-1","key":"1"}, "remark":"XXX今年XXX获得优秀党员称号"}, { "name":"人员B", "review_grades":{ "name":"合格", "parent":"-1","key":"2"}, "remark":"表现良好"}]"; JSONArray tableData = JSONArray.parseArray(review);

jsonArray转list

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1	List<DemocracyReviewVO> ls = arr.toJavaList(DemocracyReviewVO.class);