map遍历的几种方式

	Map<Integer, String> maplist = new HashMap<>();
		maplist.put(1, "xiaoli");
		maplist.put(2, "xiao");
		maplist.put(3, "xiaoming");
		maplist.put(4, "li");
		maplist.put(5, "ming");
		maplist.put(5, "xiao");

		// 使用Lambda表达式 遍历
		maplist.forEach((key, value)->{
			System.out.println("key: " + key + ", value: " + value);
		});

		// 使用Stream API遍历entry
		maplist.entrySet().stream().forEach(map->{
			System.out.println(map.getKey()+": "+map.getValue());
		});

		// for循环	
		for (Map.Entry<Integer, String> entry : maplist.entrySet()) {
			Integer key = entry.getKey();
			String value = entry.getValue();
		    System.out.println(key + " -> " + value);
		}
		for (Integer key : maplist.keySet()) {
			String value = maplist.get(key);
			System.out.println(key+"->>>>"+value);	
		}

		// 迭代器
		Iterator<Entry<Integer, String>> it = maplist.entrySet().iterator();
        while(it.hasNext()){
             Entry<Integer, String> entry = it.next();
             System.out.println("key:"+entry.getKey()+"  key:"+entry.getValue());
        }