- 调用keySet()方法
Iterator<String> iterator = map.keySet().iterator();
while (iterator.hasNext()){
System.out.println("iterator:"+iterator.next());
}
Set<String> keySet =map.keySet();
// 遍历keySet，并输出key的值
for(String key : keySet){
System.out.println("key: " + key+":"+map.get(key).toString());
}
- 调用entrySet()方法
//第二种
Iterator<Map.Entry<String, Object>> iterator = map.entrySet().iterator();
while (iterator.hasNext()){
System.out.println("iterator:"+iterator.next());
}
for (Map.Entry<String, Object> entry : map.entrySet()){
System.out.println("key:"+entry.getKey()+";value:"+entry.getValue());
}
