diff --git a/src/main/java/com/github/hcsp/encapsulation/UserBuilder.java b/src/main/java/com/github/hcsp/encapsulation/UserBuilder.java
index e3d4a8c..1c46256 100644
--- a/src/main/java/com/github/hcsp/encapsulation/UserBuilder.java
+++ b/src/main/java/com/github/hcsp/encapsulation/UserBuilder.java
@@ -3,4 +3,37 @@
 public class UserBuilder {
     // 请在这里使用builder模式建造User对象
     // 所需的接口请参阅UserBuilderTest测试类
+    /** 用户的名 */
+    private String firstName;
+
+    /** 用户的姓 */
+    private String lastName;
+
+    /** 用户的电话 */
+    private String phoneNumber;
+
+    /** 用户的地址 */
+    private String address;
+
+    public UserBuilder firstName(String firstName){
+        this.firstName=firstName;
+        return this;
+    }
+
+    public UserBuilder lastName(String lastName){
+        this.lastName=lastName;
+        return this;
+    }
+    public UserBuilder phoneNumber(String phoneNumber){
+        this.phoneNumber=phoneNumber;
+        return this;
+    }
+    public UserBuilder address(String address){
+        this.address=address;
+        return this;
+    }
+
+    public User build(){
+        return new User(firstName,lastName,phoneNumber,address);
+    }
 }
diff --git a/src/test/java/com/github/hcsp/encapsulation/UserBuilderTest.java b/src/test/java/com/github/hcsp/encapsulation/UserBuilderTest.java
index bae72c9..b5b0a5e 100644
--- a/src/test/java/com/github/hcsp/encapsulation/UserBuilderTest.java
+++ b/src/test/java/com/github/hcsp/encapsulation/UserBuilderTest.java
@@ -18,4 +18,4 @@ public void canUseBuilderToCreateObjects() {
         Assertions.assertEquals("我也不知道", user.getPhoneNumber());
         Assertions.assertEquals("可能在地球上吧", user.getAddress());
     }
-}
+}
\ No newline at end of file