diff --git a/demo/src/test/java/com/example/demo/Dao/usageDateMapper.java b/demo/src/test/java/com/example/demo/Dao/usageDateMapper.java
index ff81952..b4edeb8 100644
--- a/demo/src/test/java/com/example/demo/Dao/usageDateMapper.java
+++ b/demo/src/test/java/com/example/demo/Dao/usageDateMapper.java
@@ -1,11 +1,30 @@
 package com.example.demo.Dao;
 
 import com.example.demo.bean.UsageDate;
-import org.apache.ibatis.annotations.Mapper;
-import org.apache.ibatis.annotations.Select;
+import org.apache.ibatis.annotations.*;
+
+import java.util.List;
+
 
 @Mapper
 public interface usageDateMapper {
-    @Select("select * from usageDate where check = {#checkNum}")
-    public UsageDate selectUsageDateByCheckNum(long checkNum);
+    @Select("select * from usagedate where transactionNum = #{transactionNum}")
+    public UsageDate selectUsageDateByCheckNum(int checkNum);
+
+    @Select("select * from usagedate")
+    public List<UsageDate> select();
+
+    @Insert("insert into usagedate(checkNum, productNum, userNum," +
+            " bankAccount, bankNum, year, amount, startTime)" +
+            " values (#{checkNum},#{productNum},#{userNum},#{bankAccount},#{bankNum}," +
+            "#{year},#{amount},#{startTime})")
+    public void addUsageDate(UsageDate usageDate);
+
+    @Update("update usagedate set checkNum=#{checkNum},productNum=#{productNum}" +
+            ",userNum=#{userNum},bankAccount=#{bankAccount},bankNum=#{bankNum}," +
+            "year=#{year},amount=#{amount},startTime=#{startTime}")
+    public void updateUsageDate(UsageDate usageDate);
+
+    @Delete("delete from usagedate where checkNum=#{checkNum}")
+    public void deleteUsageDate(int checkNum);
 }
diff --git a/demo/src/test/java/com/example/demo/Dao/useageDataMapper.java b/demo/src/test/java/com/example/demo/Dao/useageDataMapper.java
deleted file mode 100644
index bb33fb8..0000000
--- a/demo/src/test/java/com/example/demo/Dao/useageDataMapper.java
+++ /dev/null
@@ -1,30 +0,0 @@
-package com.example.demo.Dao;
-
-import com.example.demo.bean.UsageDate;
-import org.apache.ibatis.annotations.*;
-
-import java.util.List;
-
-
-@Mapper
-public interface useageDataMapper {
-    @Select("select * from usagedate where transactionNum = #{transactionNum}")
-    public UsageDate selectUsageDateByCheckNum(int checkNum);
-
-    @Select("select * from usagedate")
-    public List<UsageDate> select();
-
-    @Insert("insert into usagedate(checkNum, productNum, userNum," +
-            " bankAccount, bankNum, year, amount, startTime)" +
-            " values (#{checkNum},#{productNum},#{userNum},#{bankAccount},#{bankNum}," +
-            "#{year},#{amount},#{startTime})")
-    public void addUsageDate(UsageDate usageDate);
-
-    @Update("update usagedate set checkNum=#{checkNum},productNum=#{productNum}" +
-            ",userNum=#{userNum},bankAccount=#{bankAccount},bankNum=#{bankNum}," +
-            "year=#{year},amount=#{amount},startTime=#{startTime}")
-    public void updateUsageDate(UsageDate usageDate);
-
-    @Delete("delete from usagedate where checkNum=#{checkNum}")
-    public void deleteUsageDate(int checkNum);
-}