java中map嵌套map_java中遍历MAP,嵌套map的几种方法
java中遍历MAP的几种方法Map map=new HashMap();map.put("username", "qq");map.put("passWord", "123");map.put("userID", "1");map.put("email", "qq@qq.com");1.用for循环for (Map.Entry entr
