修改

demo/src/test/java/com/example/demo/Dao/transMapper.java

@@ -0,0 +1,29 @@
+package com.example.demo.Dao;
+
+import com.example.demo.bean.transaction;
+import org.apache.ibatis.annotations.*;
+
+import java.util.List;
+
+@Mapper
+public interface transMapper {
+    @Select("select * from transaction where transactionNum = #{transactionNum}")
+    public transaction selectAudioByCheckNum(int transactionNum);
+
+    @Select("select * from transaction")
+    public List<transaction> select();
+
+    @Insert("insert into transaction(transactionNum, payer, payee," +
+            " transactionTime, transactionAmount, note)" +
+            " values (#{transactionNum},#{payer},#{payee},#{transactionTime},#{transactionAmount}," +
+            "#{note})")
+    public void addTransaction(transaction transactions);
+
+    @Update("update audio set transactionNum=#{transactionNum},payer=#{payer}" +
+            ",payee=#{payee},transactionTime=#{transactionTime},transactionAmount=#{transactionAmount}," +
+            "note=#{note}")
+    public void updateTransaction(transaction transactions);
+
+    @Delete("delete from audio where transactionNum=#{transactionNum}")
+    public void deleteTransaction(int transactionNum);
+}

demo/src/test/java/com/example/demo/Dao/useageDataMapper.java

@@ -0,0 +1,30 @@
+package com.example.demo.Dao;
+
+import com.example.demo.bean.transaction;
+import org.apache.ibatis.annotations.*;
+
+import java.util.List;
+
+
+@Mapper
+public interface useageDataMapper {
+    @Select("select * from transaction where transactionNum = #{transactionNum}")
+    public transaction selectAudioByCheckNum(int transactionNum);
+
+    @Select("select * from transaction")
+    public List<transaction> select();
+
+    @Insert("insert into transaction(transactionNum, payer, payee," +
+            " transactionTime, transactionAmount, note)" +
+            " values (#{transactionNum},#{payer},#{payee},#{transactionTime},#{transactionAmount}," +
+            "#{note})")
+    public void addTransaction(transaction transactions);
+
+    @Update("update audio set transactionNum=#{transactionNum},payer=#{payer}" +
+            ",payee=#{payee},transactionTime=#{transactionTime},transactionAmount=#{transactionAmount}," +
+            "note=#{note}")
+    public void updateTransaction(transaction transactions);
+
+    @Delete("delete from audio where transactionNum=#{transactionNum}")
+    public void deleteTransaction(int transactionNum);
+}