Json转java对象和List集合

Posted 2020-10-01 Henu丶雨巷

public static void main(String[] args) { 
    
    // 转换对象
    String strJson ="{\"basemenu_id\":\"1\",\"basemenu_name\":\"aaaaaa\",\"basemenu_order\":\"2\"}";
    aaaa jb = (aaaa)json2Object(strJson,aaaa.class);//javabean 要加 ".class"
    System.out.print("json转对象"+jb.getBasemenu_id()+","+jb.getBasemenu_name()+","+jb.getBasemenu_order()+"\n");  
    
    //转list
    String json="[{\"basemenu_id\":\"1\",\"basemenu_name\":\"aaaaaa\",\"basemenu_order\":\"2\"},"
    + "{\"basemenu_id\":\"2\",\"basemenu_name\":\"cccccc\",\"basemenu_order\":\"3\"},"
    + "{\"basemenu_id\":\"3\",\"basemenu_name\":\"dddddd\",\"basemenu_order\":\"4\"},"
    + "{\"basemenu_id\":\"4\",\"basemenu_name\":\"bbbbbb\",\"basemenu_order\":\"5\"},"
    + "{\"basemenu_id\":\"5\",\"basemenu_name\":\"eeeeee\",\"basemenu_order\":\"6\"},"
    + "{\"basemenu_id\":\"6\",\"basemenu_name\":\"rrrrrr\",\"basemenu_order\":\"7\"},"
    + "{\"basemenu_id\":\"7\",\"basemenu_name\":\"tttttt\",\"basemenu_order\":\"8\"},"
    + "{\"basemenu_id\":\"8\",\"basemenu_name\":\"uuuuuu\",\"basemenu_order\":\"9\"},"
    + "{\"basemenu_id\":\"9\",\"basemenu_name\":\"oooooo\",\"basemenu_order\":\"10\"},"
    + "{\"basemenu_id\":\"10\",\"basemenu_name\":\"llllll\",\"basemenu_order\":\"11\"}]";

　　@SuppressWarnings("rawtypes")
　　List list = (List)json2ObjectList(json, aaaa.class); 

　　@SuppressWarnings("rawtypes")
　　Iterator it = list.iterator(); 
   　　　System.out.print("集合循环\n");
        while(it.hasNext()){  
        aaaa p = (aaaa)it.next();      

        System.out.print(p.getBasemenu_id()+","+p.getBasemenu_name()+","+p.getBasemenu_order()+"\n"); 
    }     
} 
   
//单个对象
public static Object json2Object(String strJson, @SuppressWarnings("rawtypes") Class beanClass) {       
　　return JSONObject.toBean(JSONObject.fromObject(strJson), beanClass);   
} 
    
//返回 list 对象数组  字符串JSON要添加[] 
public static Object json2ObjectList(String strJson, @SuppressWarnings("rawtypes")Class beanClass) {       
　　return JSONArray.toCollection(JSONArray.fromObject(strJson), beanClass);   
}