循环Map的两种方法

	public static void main(String[] args) {
		Map<String, Object> map = new HashMap<String, Object>();
		map.put("username", "huxiao");
		map.put("password", "huxiaoPassword");
		

		// 方法一：按条取数据
		for (Map.Entry<String, Object> entry : map.entrySet()) {
//			System.out.println(entry);
			System.out.println(entry.getKey() + " = " + entry.getValue());
		}

		System.out.println("------------------------------------");
		
		// 方法二：用key循环：此方法仅在java5以后有效，而且速度比上面的那个慢
		for (String key : map.keySet()) {
			System.out.println(key + " = " + map.get(key));
		}
		
	}