map的遍历方式

(1) keySet()遍历

for (String key : map.keySet()) { System.out.println(key + " ：" + map.get(key)); }

(2)entrySet()遍历

for (Map.Entry<String, String> entry : map.entrySet()) { System.out.println(entry.getKey() + " ：" + entry.getValue()); }

(3)迭代器的 keySet()遍历

Iterator<String> iterator = map.keySet().iterator(); while (iterator.hasNext()) { String key = iterator.next(); System.out.println(key + "　：" + map.get(key)); }

(4)迭代器 entrySet()遍历

Iterator<Map.Entry<String, String>> iterator = map.entrySet().iterator(); while (iterator.hasNext()) { Map.Entry<String, String> entry = iterator.next(); System.out.println(entry.getKey() + "　：" + entry.getValue()); }