diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/base/mapper/MPJJoinMapper.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/base/mapper/MPJJoinMapper.java
index 436dfa6..42627d8 100644
--- a/mybatis-plus-join-core/src/main/java/com/github/yulichang/base/mapper/MPJJoinMapper.java
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/base/mapper/MPJJoinMapper.java
@@ -21,7 +21,7 @@ public interface MPJJoinMapper<T> extends BaseMapper<T> {
      *
      * @param wrapper joinWrapper
      */
-    Integer selectJoinCount(@Param(Constants.WRAPPER) MPJBaseJoin<T> wrapper);
+    Long selectJoinCount(@Param(Constants.WRAPPER) MPJBaseJoin<T> wrapper);
 
     /**
      * 连表查询返回一条记录
@@ -62,15 +62,15 @@ public interface MPJJoinMapper<T> extends BaseMapper<T> {
      * @param clazz   resultType
      * @param <DTO>   分页返回对象
      */
-    <DTO, P extends IPage<?>> IPage<DTO> selectJoinPage(P page,
-                                                        @Param(Constant.CLAZZ) Class<DTO> clazz,
-                                                        @Param(Constants.WRAPPER) MPJBaseJoin<T> wrapper);
+    <DTO, P extends IPage<DTO>> P selectJoinPage(P page,
+                                                 @Param(Constant.CLAZZ) Class<DTO> clazz,
+                                                 @Param(Constants.WRAPPER) MPJBaseJoin<T> wrapper);
 
     /**
      * 连表查询返回Map集合并分页
      *
      * @param wrapper joinWrapper
      */
-    <P extends IPage<?>> IPage<Map<String, Object>> selectJoinMapsPage(P page,
-                                                                       @Param(Constants.WRAPPER) MPJBaseJoin<T> wrapper);
+    <P extends IPage<Map<String, Object>>> P selectJoinMapsPage(P page,
+                                                                @Param(Constants.WRAPPER) MPJBaseJoin<T> wrapper);
 }
diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/base/service/MPJJoinService.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/base/service/MPJJoinService.java
index a58d63f..08e8d9d 100644
--- a/mybatis-plus-join-core/src/main/java/com/github/yulichang/base/service/MPJJoinService.java
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/base/service/MPJJoinService.java
@@ -18,7 +18,7 @@ public interface MPJJoinService<T> extends IService<T> {
     /**
      * 根据 Wrapper 条件，查询总记录数
      */
-    default Integer selectJoinCount(MPJBaseJoin<T> wrapper) {
+    default Long selectJoinCount(MPJBaseJoin<T> wrapper) {
         return ((MPJBaseMapper<T>) getBaseMapper()).selectJoinCount(wrapper);
     }
 
@@ -39,7 +39,7 @@ public interface MPJJoinService<T> extends IService<T> {
     /**
      * 连接查询返回集合并分页
      */
-    default <DTO, P extends IPage<?>> IPage<DTO> selectJoinListPage(P page, Class<DTO> clazz, MPJBaseJoin<T> wrapper) {
+    default <DTO, P extends IPage<DTO>> P selectJoinListPage(P page, Class<DTO> clazz, MPJBaseJoin<T> wrapper) {
         return ((MPJBaseMapper<T>) getBaseMapper()).selectJoinPage(page, clazz, wrapper);
     }
 
@@ -60,8 +60,7 @@ public interface MPJJoinService<T> extends IService<T> {
     /**
      * 连接查询返回Map集合并分页
      */
-    default <P extends IPage<Map<String, Object>>> IPage<Map<String, Object>> selectJoinMapsPage(
-            P page, MPJBaseJoin<T> wrapper) {
+    default <P extends IPage<Map<String, Object>>> P selectJoinMapsPage(P page, MPJBaseJoin<T> wrapper) {
         return ((MPJBaseMapper<T>) getBaseMapper()).selectJoinMapsPage(page, wrapper);
     }
 }
diff --git a/mybatis-plus-join-test/test-join/src/test/java/com/github/yulichang/test/join/LambdaWrapperTest.java b/mybatis-plus-join-test/test-join/src/test/java/com/github/yulichang/test/join/LambdaWrapperTest.java
index 5c7c82d..184973f 100644
--- a/mybatis-plus-join-test/test-join/src/test/java/com/github/yulichang/test/join/LambdaWrapperTest.java
+++ b/mybatis-plus-join-test/test-join/src/test/java/com/github/yulichang/test/join/LambdaWrapperTest.java
@@ -519,7 +519,7 @@ class LambdaWrapperTest {
      */
     @Test
     void test1() {
-        Page<Object> page = new Page<>(1, 10);
+        Page<UserDTO> page = new Page<>(1, 10);
         page.setSearchCount(false);
         IPage<UserDTO> iPage = userMapper.selectJoinPage(page, UserDTO.class,
                 MPJWrappers.<UserDO>lambdaJoin()
@@ -594,7 +594,7 @@ class LambdaWrapperTest {
                 .select(AddressDO.class, p -> true)
                 .leftJoin(AddressDO.class, AddressDO::getUserId, UserDO::getId)
                 .eq(UserDO::getId, 1);
-        IPage<UserDTO> page = userMapper.selectJoinPage(new Page<>(1, 10), UserDTO.class, wrapper);
+        Page<UserDTO> page = userMapper.selectJoinPage(new Page<>(1, 10), UserDTO.class, wrapper);
         assert page.getRecords().get(0).getAddress() != null;
         page.getRecords().forEach(System.out::println);
     }