diff --git a/src/main/java/com/darkness/api/mapper/demo/DemoMapper.java b/src/main/java/com/darkness/api/mapper/demo/DemoMapper.java
deleted file mode 100644
index 7c12dee..0000000
--- a/src/main/java/com/darkness/api/mapper/demo/DemoMapper.java
+++ /dev/null
@@ -1,4 +0,0 @@
-package com.darkness.api.mapper.demo;
-
-public class DemoMapper {
-}
diff --git a/src/main/java/com/darkness/api/mapper/test/TestMapper.java b/src/main/java/com/darkness/api/mapper/test/TestMapper.java
deleted file mode 100644
index e82d295..0000000
--- a/src/main/java/com/darkness/api/mapper/test/TestMapper.java
+++ /dev/null
@@ -1,4 +0,0 @@
-package com.darkness.api.mapper.test;
-
-public interface TestMapper {
-}
diff --git a/src/main/java/com/darkness/api/repository/demo/DemoRepository.java b/src/main/java/com/darkness/api/repository/demo/DemoRepository.java
deleted file mode 100644
index 0e8d35a..0000000
--- a/src/main/java/com/darkness/api/repository/demo/DemoRepository.java
+++ /dev/null
@@ -1,4 +0,0 @@
-package com.darkness.api.repository.demo;
-
-public interface DemoRepository {
-}
diff --git a/src/main/java/com/darkness/api/repository/test/TestRepository.java b/src/main/java/com/darkness/api/repository/test/TestRepository.java
deleted file mode 100644
index 20427d1..0000000
--- a/src/main/java/com/darkness/api/repository/test/TestRepository.java
+++ /dev/null
@@ -1,4 +0,0 @@
-package com.darkness.api.repository.test;
-
-public interface TestRepository {
-}
diff --git a/src/main/java/com/darkness/common/util/ConvertUtils.java b/src/main/java/com/darkness/common/util/ConvertUtils.java
new file mode 100644
index 0000000..2063317
--- /dev/null
+++ b/src/main/java/com/darkness/common/util/ConvertUtils.java
@@ -0,0 +1,36 @@
+package com.darkness.common.util;
+
+import org.springframework.beans.BeanUtils;
+import org.springframework.util.CollectionUtils;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+public class ConvertUtils {
+
+    public static <S, T> List<T> convertList(List<S> sourceList, Class<T> clazz) {
+        if (CollectionUtils.isEmpty(sourceList)) {
+            return new ArrayList<>();
+        }
+        List<T> targetList = new ArrayList<>(sourceList.size());
+        for (S sourceObj : sourceList) {
+            if (Objects.nonNull(sourceObj)) {
+                T targetObj = BeanUtils.instantiateClass(clazz);
+                BeanUtils.copyProperties(sourceObj, targetObj);
+                targetList.add(targetObj);
+            } else {
+                targetList.add(null); // 或者根据业务需求决定是否添加null
+            }
+        }
+        return targetList;
+    }
+    public static <T, S> T convertObj(S sourceObj, Class<T> clazz) {
+        if (Objects.isNull(sourceObj)) {
+            return null;
+        }
+        T targetObj = BeanUtils.instantiateClass(clazz);
+        BeanUtils.copyProperties(sourceObj, targetObj);
+        return targetObj;
+    }
+}
diff --git a/src/main/java/com/darkness/common/util/HandlePage.java b/src/main/java/com/darkness/common/util/HandlePage.java
index 7cfdd88..6ffaaa2 100644
--- a/src/main/java/com/darkness/common/util/HandlePage.java
+++ b/src/main/java/com/darkness/common/util/HandlePage.java
@@ -5,13 +5,11 @@ import java.util.List;
 public class HandlePage {
 
     /**分页  start = (page - 1) * size, end = page * size*/
-    private <T> List<T> handlePage(List<T> source, int start, int end){
-        int total = source.size();
-//        end = end > total ? total : end;
-        end = Math.min(end, total);
-        if (end <= start) {
-            return null;
-        }
-        return source.subList(start,end);
+    public <T> List<T> handPage(List<T> data,int pageNum,int pageSize){
+
+        int fromIndex =  Math.min((pageNum - 1) * pageSize, data.size());
+        int toIndex = Math.min(fromIndex + pageSize, data.size());
+
+        return data.subList(fromIndex, toIndex);
     }
 }