JAVA中json转Map,jsonArray转List集合,List集合转json

Posted 2022-11-28 xiaoyue1606bj

 1  //json字符串转换为MAP
 2         public static Map jsonStrToMap(String s) 
 3             Map map = new HashMap();
 4             //注意这里JSONObject引入的是net.sf.json
 5             net.sf.json.JSONObject json = net.sf.json.JSONObject.fromObject(s);
 6             Iterator keys = json.keys();
 7             while (keys.hasNext()) 
 8                 String key = (String) keys.next();
 9                 String value = json.get(key).toString();
10                 if (value.startsWith("") && value.endsWith("")) 
11                     map.put(key, jsonStrToMap(value));
12                  else 
13                     map.put(key, value);
14                 
15  
16             
17             return map;
18         
19         
20         // 将jsonArray字符串转换成List集合
21         public static List jsonToList(String json, Class beanClass) 
22             if (!StringUtils.isBlank(json)) 
23                 //这里的JSONObject引入的是 com.alibaba.fastjson.JSONObject;
24                 return JSONObject.parseArray(json, beanClass);
25              else 
26                 return null;
27             
28         
29         
30         //List集合转换为json
31         public static JSON listToJson(List list) 
32             JSON json=(JSON) JSON.toJSON(list);
33             return json;
34