import com.fasterxml.jackson.databind.ObjectMapper;import java.io.IOException;import java.util.List;import java.util.Map;public class JsonUtils {    private  static  ObjectMapper objectMapper = new ObjectMapper();    public static String object2Json(Object obj){        if (obj == null) {            return "";        }        String result = null;        try {            result = objectMapper.writeValueAsString(obj);        } catch (IOException e) {            e.printStackTrace();        }        return result;    }        public static Map
      jsonToMap(String json){        return json2Object(json, Map.class);    }        public static 
     
       T json2Object(String json, Class
      
        cls){        T result = null;        try {            result =  objectMapper.readValue(json, cls);        } catch (IOException e) {            e.printStackTrace();        }                return result;    }        public static 
       
         T conveterObject(Object srcObject, Class
        
          destObjectType) {        String jsonContent = object2Json(srcObject);        return json2Object(jsonContent, destObjectType);    }        public static 
         
           List
          
            fromJsonList(String json, Class
           
             clazz) throws IOException { return objectMapper.readValue(json,objectMapper.getTypeFactory().constructCollectionType(List.class, clazz)); }}
           
          
         
        
       
      
     

     
        
     
      com.fasterxml.jackson.core
         
     
      jackson-databind
         
     
      2.4.2