Java object and json data conversion method 1-use json-lib

Java object and json data conversion method 1-use json-lib

Test code:

Package com. yanek. util. json; import java. util. arrayList; import java. util. list; import net. sf. json. JSONArray; import net. sf. json. JSONObject; public class JSONLibUtil {/*** @ param args */public static void main (String [] args) {Hotel h1 = new Hotel (); h1.setId (1 ); h1.setName ("name1"); Hotel h2 = new Hotel (); h2.setId (2); h2.setName ("name2"); RoomTypeVO t1 = new RoomTypeVO (); t1.setPrice ("20"); t1.setTypeid (1); t1.setTypename ("nnn1"); List
 
  
RoomTypeVOs = new ArrayList
  
   
(); RoomTypeVOs. add (t1); RoomTypeVOs. add (t1); h1.setRoomTypeVOs (RoomTypeVOs); Hotel hotel = new Hotel (); System. out. println ("json1:" + bean2Json (h1); String s = bean2Json (h1); hotel = json2Bean (s, Hotel. class); System. out. println ("json2:" + bean2Json (hotel); System. out. println ("json3:" + beanlist2Json (RoomTypeVOs); String s2 = beanlist2Json (RoomTypeVOs); Object [] list = getDTOArray (s2, RoomTypeVO. class); for (Object v: list) {RoomTypeVO rt = (RoomTypeVO) v; System. out. println (rt. getTypeid () + "-" + rt. getTypename () + "-" + rt. getPrice () ;}} public static String bean2Json (Object obj) {JSONObject jsonObject = JSONObject. fromObject (obj); return jsonObject. toString ();} public static String beanlist2Json (Object obj) {JSONArray jsonObject = JSONArray. fromObject (obj); return jsonObject. toString () ;}@ SuppressWarnings ("unchecked") public static
   
    
T json2Bean (String jsonStr, Class
    
     
ObjClass) {return (T) JSONObject. toBean (JSONObject. fromObject (jsonStr), objClass) ;}@ SuppressWarnings ("unchecked") public static
     
      
T jsonarray2Bean (String jsonStr, Class
      
        ObjClass) {return (T) JSONObject. toBean (JSONObject. fromObject (jsonStr), objClass);}/*** get a java object array from a json array, for example, * [{"id": idValue, "name ": nameValue}, {"id": idValue, "name": nameValue},...] * @ param object * @ param clazz * @ return */public static Object [] getDTOArray (String jsonString, Class clazz) {JSONArray array = JSONArray. fromObject (jsonString); Object [] obj = new Object [array. size ()]; for (int I = 0; I <array. size (); I ++) {JSONObject jsonObject = array. getJSONObject (I); obj [I] = JSONObject. toBean (jsonObject, clazz);} return obj ;}}
      
     
    
   
  
 

The output is as follows:

json1:::{"id":1,"name":"name1","roomTypeVOs":[{"price":"20","typeid":1,"typename":"nnn1"},{"price":"20","typeid":1,"typename":"nnn1"}]}json2:::{"id":1,"name":"name1","roomTypeVOs":[{"price":"20","typeid":1,"typename":"nnn1"},{"price":"20","typeid":1,"typename":"nnn1"}]}json3:::[{"price":"20","typeid":1,"typename":"nnn1"},{"price":"20","typeid":1,"typename":"nnn1"}]1-nnn1-201-nnn1-20

Related java entity classes:

package com.yanek.util.json;public class RoomTypeVO {public int getTypeid() {return typeid;}public void setTypeid(int typeid) {this.typeid = typeid;}public String getTypename() {return typename;}public void setTypename(String typename) {this.typename = typename;}public String getPrice() {return price;}public void setPrice(String price) {this.price = price;}private int typeid;private String typename;private String price;}package com.yanek.util.json;import java.util.List;public class Hotel {public List
 
   getRoomTypeVOs() {return RoomTypeVOs;}public void setRoomTypeVOs(List
  
    roomTypeVOs) {RoomTypeVOs = roomTypeVOs;}private List
   
     RoomTypeVOs;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}private int id;private String name;}