1.先将map对象转成set，然后再转为迭代器
1 Iterator iterator = map.entrySet().iterator();
2 while(iterator.hasNext()){
3 Entry entry = iterator.next();
4 System.out.println(entry.getKey()); // 获取key
5 System.out.println(entry.getValue()); // 获取value
6 }
2.先将map转为set类型的key值集合，然后转为迭代器
1 Iterator iterator = map.keySet().iterator();
2 while(iterator.hasNext()){
3 Object key = (Object)iterator.next();
4 System.out.println(key); // 获取key
5 System.out.println(map.get(key)); // 获取value
6 }