json字符串、javaBean、Map之间的相互转换

在java开发中，经常会遇到json字符串、javaBean、Map之间的类型转换。下面我介绍一种利用com.alibaba.fastjson和commons-beanutils实现它们之间转换的方法：

　　导包

    com.alibaba
    fastjson
    1.2.44



    commons-beanutils
    commons-beanutils
    1.9.3

　　

1. json字符串、Map
   

   //Map-->json字符串
   Map map = new HashMap<>();
           map.put("orderNo","xp001");
           map.put("plateNo","xp002");
           map.put("dispatcher","xp003");
           map.put("parkingSpace","xp004");
           map.put("roadId","xp005");
   
    String string = JSONObject.toJSONString(map);
   
   //json字符串-->Map
   Map map2= JSON.parseObject(string,Map.class);
   for (Map.Entry entry : map2.entrySet()) {
              System.out.println(entry .getKey()+":"+entry .getValue());
           }

    

2. json字符串、JavaBean
   

   @Data
   @ToString
   public class OrderCarInfo  {
       private String orderNo;//订单号
       private String plateNo;//车牌号
       private String dispatcher;  //调度
       private String parkingSpace;  //车位
       private String roadId;  //路单号
   }
   

   　

   //jsonString-->JavaBean
   //string为前面的json字符串
   OrderCarInfo orderCarInfo = JSON.parseObject(string,OrderCarInfo.class);
   
   //JavaBean-->jsonString
   String json = JSON.toJSONString(orderCarInfo);
   
   //jsonString-->List
   List carInfos1 = JSONArray.parseArray(json,OrderCarInfo.class);
   List carInfos2 = JSON.parseArray(json,OrderCarInfo.class);
   
   //List-->jsonString
   String json2 = JSONObject.toJSONString(carInfos1 );
   String json3 = JSONObject.toJSONString(carInfos2 );

    

   　　

3. JavaBean、Map

   //JavaBean-->Map
   try {
               Map params = BeanUtils.describe(orderCarInfo);
   } catch (IllegalAccessException e) {
               e.printStackTrace();
   } catch (InvocationTargetException e) {
               e.printStackTrace();
   } catch (NoSuchMethodException e) {
               e.printStackTrace();
   }
   
   //Map-->JavaBean
   OrderCarInfo orderCarInfo = new OrderCarInfo();
   Map map = new HashMap<>();
           map.put("orderNo","xp001");
           map.put("plateNo","xp002");
           map.put("dispatcher","xp003");
           map.put("parkingSpace","xp004");
           map.put("roadId","xp005");
           try {
               BeanUtils.copyProperties(orderCarInfo,map);
           } catch (IllegalAccessException e) {
               e.printStackTrace();
           } catch (InvocationTargetException e) {
               e.printStackTrace();
           }

    

转载于:https://www.cnblogs.com/xphhh/p/10649713.html