Map遍历

代码如下

       //map的入口集合
       for(Map.Entry<String, String> mEntry:map.entrySet()){
    	   String key=mEntry.getKey();
    	   String value =mEntry.getValue();
    	   System.out.println(key+": "+value);
       }
       //map的迭代器
       Iterator<Entry<String, String>> iterator = map.entrySet().iterator();
       while(iterator.hasNext()){
    	   Entry<String, String> next = iterator.next();   
    	   System.out.println(next.getKey()+": "+next.getValue());
       }
       //map的key集合
       for(String key:map.keySet()){
    	   System.out.println(key+": "+map.get(key));
       }