Set<String> keySet=maps.keySet();
for(String string:keySet){
maps.get(string)
}
for(Map.Entry<String,String> entry : maps.entrySet()){
System.out.println("key: "+entry.getKey+"value: "+entry.getValue());
}
原文：https://www.cnblogs.com/bzywns/p/9586068.html