map遍历

'''
public static void main(String[] args) {

    Map<String, String> map = new HashMap<String, String>();
    map.put("1", "a");
    map.put("2", "b");
    map.put("3", "c");
    map.put("4", "d");
    map.put("5", "e");
    
    for(Map.Entry<String, String> entry : map.entrySet()){
        String key = entry.getKey();
        String value = entry.getValue();
        System.out.println(key+":"+value);
    }
    
}

'''