获取所有键值对对象的集合Set> mapEntrySet = map.entrySet();

Set<Map.Entry<String, String>> mapEntrySet = map.entrySet();
for (Map.Entry<String, String> mapEntrySet : mapEntry){
    String key =mapEntrySet .getKey();

    String value =mapEntrySet .getValue();

    System.out.println(key+ ":" + value);
}
加单案例如下：