diff --git a/sa-token-core/src/main/java/cn/dev33/satoken/fun/SaRetFunction.java b/sa-token-core/src/main/java/cn/dev33/satoken/fun/SaRetFunction.java
new file mode 100644
index 00000000..d15bb0d9
--- /dev/null
+++ b/sa-token-core/src/main/java/cn/dev33/satoken/fun/SaRetFunction.java
@@ -0,0 +1,18 @@
+package cn.dev33.satoken.fun;
+
+/**
+ * 设定一个函数，并返回一个值，方便在Lambda表达式下的函数式编程
+ * @author kong
+ *
+ */
+public interface SaRetFunction {
+	
+
+	/**
+	 * 执行的方法 
+	 * @return 返回值 
+	 */
+	public Object run();
+	
+	
+}
diff --git a/sa-token-core/src/main/java/cn/dev33/satoken/session/SaSession.java b/sa-token-core/src/main/java/cn/dev33/satoken/session/SaSession.java
index cc7fb1d5..84600efd 100644
--- a/sa-token-core/src/main/java/cn/dev33/satoken/session/SaSession.java
+++ b/sa-token-core/src/main/java/cn/dev33/satoken/session/SaSession.java
@@ -8,6 +8,7 @@ import java.util.Vector;
 import java.util.concurrent.ConcurrentHashMap;
 
 import cn.dev33.satoken.SaManager;
+import cn.dev33.satoken.fun.SaRetFunction;
 
 /**
  * Session Model
@@ -325,6 +326,24 @@ public class SaSession implements Serializable {
 		return getValueByDefaultValue(get(key), defaultValue);
 	}
 	
+	/**
+	 * 
+	 * 取值 (如果值为null，则执行fun函数获取值) 
+	 * @param <T> 返回值的类型 
+	 * @param key key 
+	 * @param fun 值为null时执行的函数 
+	 * @return 值 
+	 */
+	@SuppressWarnings("unchecked")
+	public <T> T get(String key, SaRetFunction fun) {
+		Object value = get(key);
+		if(value == null) {
+			value = fun.run();
+			set(key, value);
+		}
+		return (T) value;
+	}
+	
 	/**
 	 * 取值 (转String类型) 
 	 * @param key key 
diff --git a/sa-token-demo/sa-token-demo-springboot/src/main/java/com/pj/test/TestController.java b/sa-token-demo/sa-token-demo-springboot/src/main/java/com/pj/test/TestController.java
index ba3dad35..142e5f20 100644
--- a/sa-token-demo/sa-token-demo-springboot/src/main/java/com/pj/test/TestController.java
+++ b/sa-token-demo/sa-token-demo-springboot/src/main/java/com/pj/test/TestController.java
@@ -241,7 +241,20 @@ public class TestController {
 	@RequestMapping("test")
 	public AjaxJson test() {
 		System.out.println("进来了");
-		System.out.println(StpUtil.getTokenInfo());
+//		System.out.println(StpUtil.getTokenInfo());
+		StpUtil.setLoginId(10001);
+		String ss = StpUtil.getSession().get("name", () -> {
+			System.out.println("-=------进入方法");
+			return "zhangsan";
+		});
+		ss = StpUtil.getSession().get("name", () -> {
+			System.out.println("-=------进入方法2");
+			return "zhangsan2";
+		});
+		
+		StpUtil.getSession().delete("name");
+		System.out.println(ss);
+		
 		return AjaxJson.getSuccess("访问成功");
 	}