diff --git a/demo/src/test/java/com/example/demo/Dao/auditMapper.java b/demo/src/test/java/com/example/demo/Dao/auditMapper.java
index a2df9fc..3ae562c 100644
--- a/demo/src/test/java/com/example/demo/Dao/auditMapper.java
+++ b/demo/src/test/java/com/example/demo/Dao/auditMapper.java
@@ -12,7 +12,7 @@ import java.util.List;
 @Mapper
 public interface auditMapper {
     @Select("select * from audio where checkNum = #{checkNum}")
-    public audio selectAudioByCheckNum(int checkNum);
+    public audio selectAudioByCheckNum(String checkNum);
 
     @Select("select * from audio")
     public List<audio> select();
diff --git a/demo/src/test/java/com/example/demo/Dao/bankMapper.java b/demo/src/test/java/com/example/demo/Dao/bankMapper.java
index 21256e4..22693a4 100644
--- a/demo/src/test/java/com/example/demo/Dao/bankMapper.java
+++ b/demo/src/test/java/com/example/demo/Dao/bankMapper.java
@@ -11,10 +11,10 @@ import java.util.List;
 public interface bankMapper {
 
     @Select("select * from bank where bankNum = #{bankNum}")
-    public bank selectBankByBankNum(int bankNum);
+    public bank selectBankByBankNum(String bankNum);
 
     @Select("select * from bank where bankName = #{bankName}")
-    public bank selectBankByBankName(int bankName);
+    public bank selectBankByBankName(String bankName);
 
     @Select("select * from bank")
     public List<bank> select();
diff --git a/demo/src/test/java/com/example/demo/Dao/managerMapper.java b/demo/src/test/java/com/example/demo/Dao/managerMapper.java
index 77c1bfc..b5354df 100644
--- a/demo/src/test/java/com/example/demo/Dao/managerMapper.java
+++ b/demo/src/test/java/com/example/demo/Dao/managerMapper.java
@@ -8,7 +8,7 @@ import java.util.List;
 @Mapper
 public interface managerMapper {
     @Select("select * from manager where managerNum = #{managerName}")
-    public manager selectManagerByManagerName(int managerName);
+    public manager selectManagerByManagerName(String managerName);
 
     @Insert("insert into manager(managerNum, managerName, managerPwd, " +
             "managerRight, telephoneNum) values (#{managerNum},#{managerName}," +
diff --git a/demo/src/test/java/com/example/demo/Dao/productMapper.java b/demo/src/test/java/com/example/demo/Dao/productMapper.java
new file mode 100644
index 0000000..5fc2361
--- /dev/null
+++ b/demo/src/test/java/com/example/demo/Dao/productMapper.java
@@ -0,0 +1,32 @@
+package com.example.demo.Dao;
+
+import com.example.demo.bean.product;
+import org.apache.ibatis.annotations.*;
+
+import java.util.List;
+
+@Mapper
+public interface productMapper {
+    @Select("select * from product where productNum = #{productNum}")
+    public product selectProductByProductNum(String productNum);
+
+    @Select("select * from product where productName = #{productName}")
+    public product selectProductByProductName(String productName);
+
+    @Select("select * from product")
+    public List<product> select();
+
+    @Insert("insert into product(productNum, productName, category, intrate, " +
+            "bankNum, productDescription, pictureAddress)" +
+            " values (#{productNum},#{productName},#{category},#{intrate},#{bankNum}," +
+            "#{productDescription},#{pictureAddress})")
+    public void addProduct(product products);
+
+    @Update("update product set productNum=#{productNum},productName=#{productName}" +
+            ",category=#{category},intrate=#{intrate},bankNum=#{bankNum}," +
+            "productDescription=#{productDescription},pictureAddress=#{pictureAddress}")
+    public void updateAudio(product products);
+
+    @Delete("delete from product where productNum=#{productNum}")
+    public void deleteAudio(String productNum);
+}
diff --git a/demo/src/test/java/com/example/demo/Dao/userMapper.java b/demo/src/test/java/com/example/demo/Dao/userMapper.java
index 99f0c14..c290b24 100644
--- a/demo/src/test/java/com/example/demo/Dao/userMapper.java
+++ b/demo/src/test/java/com/example/demo/Dao/userMapper.java
@@ -8,7 +8,7 @@ import java.util.List;
 @Mapper
 public interface userMapper {
     @Select("select * from user where userNum = #{userNum}")
-    public user selectUserByuserNum(int userNum);
+    public user selectUserByuserNum(String userNum);
 
     @Select("select * from user")
     public List<user> select();
diff --git a/demo/src/test/java/com/example/demo/bean/product.java b/demo/src/test/java/com/example/demo/bean/product.java
index 9fa6f67..617a856 100644
--- a/demo/src/test/java/com/example/demo/bean/product.java
+++ b/demo/src/test/java/com/example/demo/bean/product.java
@@ -10,5 +10,68 @@ public class product {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private String productNum;
+    private String productName;
+    private String category;
+    private float intrate;
+    private String bankNum;
+    private String productDescription;
+    private String pictureAddress;
 
+    public product(){};
+
+    public String getPictureAddress() {
+        return pictureAddress;
+    }
+
+    public void setPictureAddress(String pictureAddress) {
+        this.pictureAddress = pictureAddress;
+    }
+
+    public String getProductDescription() {
+        return productDescription;
+    }
+
+    public void setProductDescription(String productDescription) {
+        this.productDescription = productDescription;
+    }
+
+    public String getBankNum() {
+        return bankNum;
+    }
+
+    public void setBankNum(String bankNum) {
+        this.bankNum = bankNum;
+    }
+
+    public float getIntrate() {
+        return intrate;
+    }
+
+    public void setIntrate(float intrate) {
+        this.intrate = intrate;
+    }
+
+    public String getCategory() {
+        return category;
+    }
+
+    public void setCategory(String category) {
+        this.category = category;
+    }
+
+    public String getProductName() {
+        return productName;
+    }
+
+    public void setProductName(String productName) {
+        this.productName = productName;
+    }
+
+    public String getProductNum() {
+        return productNum;
+    }
+
+    public void setProductNum(String productNum) {
+        this.productNum = productNum;
+    }
 }
diff --git a/demo/src/test/java/com/example/demo/bean/transaction.java b/demo/src/test/java/com/example/demo/bean/transaction.java
new file mode 100644
index 0000000..4950e2d
--- /dev/null
+++ b/demo/src/test/java/com/example/demo/bean/transaction.java
@@ -0,0 +1,68 @@
+package com.example.demo.bean;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+
+@Entity
+public class transaction {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private String transaction;
+    private String payer;
+    private String payee;
+    private float transactionTime;
+    private float transactionAmount;
+    private String note;
+
+    public transaction(){};
+
+    public String getNote() {
+        return note;
+    }
+
+    public void setNote(String note) {
+        this.note = note;
+    }
+
+    public float getTransactionAmount() {
+        return transactionAmount;
+    }
+
+    public void setTransactionAmount(float transactionAmount) {
+        this.transactionAmount = transactionAmount;
+    }
+
+    public float getTransactionTime() {
+        return transactionTime;
+    }
+
+    public void setTransactionTime(float transactionTime) {
+        this.transactionTime = transactionTime;
+    }
+
+    public String getPayee() {
+        return payee;
+    }
+
+    public void setPayee(String payee) {
+        this.payee = payee;
+    }
+
+    public String getPayer() {
+        return payer;
+    }
+
+    public void setPayer(String payer) {
+        this.payer = payer;
+    }
+
+    public String getTransaction() {
+        return transaction;
+    }
+
+    public void setTransaction(String transaction) {
+        this.transaction = transaction;
+    }
+}