diff --git a/s-day04/src/com/inmind/map01/MapDemo03.java b/s-day04/src/com/inmind/map01/MapDemo03.java
new file mode 100644
index 0000000..6f5ccf2
--- /dev/null
+++ b/s-day04/src/com/inmind/map01/MapDemo03.java
@@ -0,0 +1,33 @@
+package com.inmind.map01;
+
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Set;
+
+/*
+4.Map集合的第二种遍历方式(键值对遍历)
+- public Set<Map.Entry<K,V>>  entrySet():获取到Map集合中所有的键值对对象的集合(Set集合)。
+ */
+public class MapDemo03 {
+    public static void main(String[] args) {
+        //创建K和V都是字符串的双列集合
+        Map<String,String> maps = new HashMap<>();
+        maps.put("刘备","孙尚香");
+        maps.put("吕布","貂蝉");
+        maps.put("张飞","夏侯驰");
+        //遍历：先获取所有的键值对对象，然后对键值对对象进行遍历（间接遍历）
+        Set<Map.Entry<String, String>> entries = maps.entrySet();
+        //迭代器遍历'
+        Iterator<Map.Entry<String, String>> iterator = entries.iterator();
+        while (iterator.hasNext()) {
+            Map.Entry<String, String> entry = iterator.next();
+            System.out.println(entry.getKey()+"=="+entry.getValue());
+        }
+        System.out.println("--------------");
+        //foreach循环
+        for (Map.Entry<String,String> entry : entries) {
+            System.out.println(entry.getKey()+"=="+entry.getValue());
+        }
+    }
+}