public static void main(String[] args) {
Map<String,String> map = new HashMap<String,String> ();
map.put("1", "a");
map.put("2", "b");
map.put("3", "c");
Iterator iterator = map.keySet().iterator();
while (iterator.hasNext()) {
String key = (String) iterator.next();
if ("1".equals(key) || "2".equals(key)) {
iterator.remove(); //添加该行代码
map.remove(key);
}
}
}
工具类
public class MapUtil {
/**
* Map中根据key批量删除键值对
* @param map
* @param excludeKeys
* @param <K>
* @param <V>
* @return
*/
public static <K, V> Map removeEntries(Map<K, V> map, K[] excludeKeys) {
Iterator<K> iterator = map.keySet().iterator();
while (iterator.hasNext()) {
K key = iterator.next();
// 如果key 刚好在要排除的key的范围中
if (ArrayUtils.contains(excludeKeys, key)) {
iterator.remove();
map.remove(key);
}
}
return map;
}
}
MapUtil.removeEntries(map, new String[]{"1", "2"});