diff --git a/stream-core/src/main/java/org/dromara/streamquery/stream/core/optional/Opp.java b/stream-core/src/main/java/org/dromara/streamquery/stream/core/optional/Opp.java
index 6b2e935a26a22e71510abf348aed192e41d38ac3..97789a9d6eb81e8fa12b572dc02ff5f29f83f257 100644
--- a/stream-core/src/main/java/org/dromara/streamquery/stream/core/optional/Opp.java
+++ b/stream-core/src/main/java/org/dromara/streamquery/stream/core/optional/Opp.java
@@ -361,6 +361,16 @@ public class Opp<T> {
     }
   }
 
+  /**
+   * 如果包裹里的值存在，则返回该值，如果不存在返回默认的值
+   * @param f 存在时执行的操作
+   * @param supplier 如果不存在则返回的默认值
+   * @return 如果包裹里的值存在，则返回该值，如果不存在返回默认的值
+   */
+  public  <U> U fold( Function<? super T, ? extends U> f, Supplier<? extends U> supplier) {
+    return this.<U>map(f).orElseGet(supplier);
+  }
+
   /**
    * 如果包裹里元素的值存在，就执行对应的操作，并返回本身 如果不存在，返回一个空的{@code Opp}
    *
diff --git a/stream-core/src/test/java/org/dromara/streamquery/stream/core/optional/OppTest.java b/stream-core/src/test/java/org/dromara/streamquery/stream/core/optional/OppTest.java
index cd64797225b0f1a8ec357626934f68e01a8a0d96..8c91c48177084fc0be3e80d37863b9d9a75e376a 100644
--- a/stream-core/src/test/java/org/dromara/streamquery/stream/core/optional/OppTest.java
+++ b/stream-core/src/test/java/org/dromara/streamquery/stream/core/optional/OppTest.java
@@ -62,6 +62,13 @@ class OppTest {
     Assertions.assertTrue(isEmpty);
   }
 
+  @Test
+  void foldTest() {
+      final Opp<String> opp = Opp.ofStr("     ");
+      final String fold = opp.fold(String::toUpperCase, () -> "hutool");
+      Assertions.assertEquals("hutool", fold);
+  }
+
   @Test
   void peekTest() {
     final User user = new User();