添加一个bean和dao类，添加了每月还款并存储信息，保证数据库的及时更新，包括等额本金的提前还款

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 audit where checkNum = #{checkNum}")
-    public Audit selectAudioByCheckNum(int checkNum);
+    public Audit selectAudioByCheckNum(long checkNum);
 
     @Select("select * from audit")
     public List<Audit> select();
@@ -31,5 +31,5 @@ public interface auditMapper {
     public void updateAudit(Audit audits);
 
     @Delete("delete from audit where checkNum=#{checkNum}")
-    public void deleteAudit(int checkNum);
+    public void deleteAudit(long checkNum);
 }

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

@@ -0,0 +1,16 @@
+package com.example.demo.Dao;
+
+import com.example.demo.bean.Repayment;
+import com.example.demo.bean.Transaction;
+import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Select;
+import org.apache.ibatis.annotations.Update;
+
+@Mapper
+public interface paymentMapper {
+    @Select("select * from repayment where checkNum ={#checkNum}")
+    public Repayment selectPepaymentBycheckNum(long checkNum);
+
+    @Update("update repayment set repAmount = {#repAmount} ,repSum = {#repSum} where checkNum = {#checkNum}")
+    public void updateRepayment(Repayment repayment);
+}

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

@@ -9,7 +9,7 @@ import java.util.List;
 @Mapper
 public interface productHistroyMapper {
     @Select("select * from producthistroy where productNum = #{productNum}")
-    public ProductHistroy selectAudioByCheckNum(int productNum);
+    public ProductHistroy selectAudioByCheckNum(long productNum);
 
     @Select("select * from producthistroy")
     public List<ProductHistroy> select();

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

@@ -8,22 +8,22 @@ import java.util.List;
 @Mapper
 public interface transMapper {
     @Select("select * from transaction where transactionNum = #{transactionNum}")
-    public Transaction selectAudioByCheckNum(int transactionNum);
+    public Transaction selectAudioByCheckNum(long transactionNum);
 
     @Select("select * from transaction")
     public List<Transaction> select();
 
     @Insert("insert into transaction(transactionNum, payer, payee," +
-            " transactionTime, transactionAmount, note)" +
+            " transactionTime, transactionAmount, note,checkNum)" +
             " values (#{transactionNum},#{payer},#{payee},#{transactionTime},#{transactionAmount}," +
-            "#{note})")
+            "#{note},#{checkNum})")
     public void addTransaction(Transaction transactions);
 
-    @Update("update audio set transactionNum=#{transactionNum},payer=#{payer}" +
+    @Update("update audit 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}")
+    @Delete("delete from audit where transactionNum=#{transactionNum}")
-    public void deleteTransaction(int transactionNum);
+    public void deleteTransaction(long transactionNum);
 }

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

@@ -9,7 +9,7 @@ import java.util.List;
 @Mapper
 public interface usageDateMapper {
     @Select("select * from usagedate where transactionNum = #{transactionNum}")
-    public UsageDate selectUsageDateByCheckNum(int checkNum);
+    public UsageDate selectUsageDateByCheckNum(long checkNum);
 
     @Select("select * from usagedate")
     public List<UsageDate> select();
@@ -26,5 +26,5 @@ public interface usageDateMapper {
     public void updateUsageDate(UsageDate usageDate);
 
     @Delete("delete from usagedate where checkNum=#{checkNum}")
-    public void deleteUsageDate(int checkNum);
+    public void deleteUsageDate(long checkNum);
 }

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(long userNum);
 
     @Select("select * from user")
     public List<User> select();
@@ -26,5 +26,5 @@ public interface userMapper {
     public void updateUser(User users);
 
     @Delete("delete from user where userNum=#{userNum}")
-    public void deleteUser(int userNum);
+    public void deleteUser(long userNum);
 }

demo/src/test/java/com/example/demo/bean/Audit.java

@@ -12,15 +12,15 @@ import javax.persistence.*;
 public class Audit {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
-    private int checkNum;
+    private long checkNum;
-    private  int userNum;
+    private  long userNum;
     private  double amount;
     private  String applyTime;
     private String bankAccount;
-    private int checkState;
+    private long checkState;
-    private int contractNum;
+    private long contractNum;
     private short isSignContract;
-    private  int productNum;
+    private  long productNum;
     private  int year;
     private int equation;
 

demo/src/test/java/com/example/demo/bean/Manager.java

@@ -14,7 +14,7 @@ import javax.persistence.Id;
 public class Manager {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
-    private int managerNum;
+    private long managerNum;
     private String managerName;
     private String managerPwd;
     private String managerRight;
@@ -22,7 +22,7 @@ public class Manager {
 
     public Manager(){};
 
-    public int getManagerNum() {
+    public long getManagerNum() {
         return managerNum;
     }
 

demo/src/test/java/com/example/demo/bean/Product.java

@@ -14,7 +14,7 @@ import javax.persistence.Id;
 public class Product {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
-    private int productNum;
+    private long productNum;
     private String productName;
     private String category;
     private float intrate;
@@ -68,7 +68,7 @@ public class Product {
         this.intrate = intrate;
     }
 
-    public int getProductNum() {
+    public long getProductNum() {
         return productNum;
     }
 
@@ -76,7 +76,7 @@ public class Product {
         this.productName = productName;
     }
 
-    public void setProductNum(int productNum) {
+    public void setProductNum(long productNum) {
         this.productNum = productNum;
     }
 }

demo/src/test/java/com/example/demo/bean/ProductHistroy.java

@@ -15,9 +15,9 @@ import javax.persistence.Id;
 public class ProductHistroy {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
-    private int productNum;
+    private long productNum;
     private int bankNum;
-    private int managerNum;
+    private long managerNum;
     private String productName;
     private String category;
     private float intrate;
@@ -28,19 +28,19 @@ public class ProductHistroy {
 
     public ProductHistroy(){};
 
-    public int getManagerNum() {
+    public long getManagerNum() {
         return managerNum;
     }
 
-    public void setManagerNum(int managerNum) {
+    public void setManagerNum(long managerNum) {
         this.managerNum = managerNum;
     }
 
-    public int getProductNum() {
+    public long getProductNum() {
         return productNum;
     }
 
-    public void setProductNum(int productNum) {
+    public void setProductNum(long productNum) {
         this.productNum = productNum;
     }
 

demo/src/test/java/com/example/demo/bean/Repayment.java

@@ -0,0 +1,15 @@
+package com.example.demo.bean;
+
+import lombok.Getter;
+import lombok.Setter;
+
+import javax.persistence.Entity;
+
+@Getter
+@Setter
+@Entity
+public class Repayment {
+    private long checkNum;
+    private double repAmount;
+    private double repSum;
+}

demo/src/test/java/com/example/demo/bean/Transaction.java

@@ -14,12 +14,19 @@ import javax.persistence.Id;
 public class Transaction {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
-    private int transactionNum;
+    private long transactionNum;
-    private String payer;
+    private long payer;
-    private String payee;
+    private long payee;
     private float transactionTime;
     private float transactionAmount;
     private String note;
+    private long checkNum;
 
     public Transaction(){};
+    public Transaction(long checkNum,long payer,long payee,double transationAmount){
+        this.checkNum=checkNum;
+        this.payer = payer;
+        this.payee = payee;
+        this.transactionAmount=transactionNum;
+    }
 }

demo/src/test/java/com/example/demo/bean/UsageDate.java

@@ -1,10 +1,12 @@
 package com.example.demo.bean;
 
 import lombok.Getter;
+import lombok.Setter;
 
 import javax.persistence.Entity;
 
 @Getter
+@Setter
 @Entity
 public class UsageDate {
     private long checkNum;

demo/src/test/java/com/example/demo/bean/User.java

@@ -14,7 +14,7 @@ import javax.persistence.Id;
 public class User {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
-    private int userNum;
+    private long userNum;
     private String userName;
     private String userPwd;
     private String userRight;
@@ -22,7 +22,7 @@ public class User {
     private String idNum;
     private String telephoneNum;
     private String address;
-    private int isIdentify;
+    private String isIdentify;
     private String registerTime;
 
     public User(){};

demo/src/test/java/com/example/demo/circulator/service/EPAIR_CirService.java

@@ -16,6 +16,7 @@ public class EPAIR_CirService extends CirService{
 
     @Transactional //数据库与事物的一致性
     public double NextCirculator(long checkNum){
+        try{
             UsageDate usageDate = usageDateMapper.selectUsageDateByCheckNum(checkNum);
             int year = usageDate.getYear();
             double amount = usageDate.getAmount();
@@ -23,18 +24,34 @@ public class EPAIR_CirService extends CirService{
 
             Product product = productMapper.selectProductByProductNum(productNum);
             float intrate = product.getIntrate();
+            double rep_amount = 0;
+
+            double not_rep_amount = amount - rep_amount;
             intrate /= 12;
             int month = year*12;
             double rep = Math.pow((1+intrate),month)/(Math.pow((1+intrate),month)-1);
             double next_principal_and_interest = rep * intrate * amount;
             return next_principal_and_interest;
+        }catch(Exception e){
+            e.printStackTrace();
+        }finally {
+
+        }
+        return -1;
     }
 
     public double SumCirculator(long productNum,double amount,int year){
+        try{
             Product product = productMapper.selectProductByProductNum(productNum);
             float intrate = product.getIntrate();
             double rep = Math.pow((1+intrate),year)/(Math.pow((1+intrate),year)-1);
             double principal_and_interest = rep * intrate * amount * year;
             return principal_and_interest;
+        }catch(Exception e){
+            e.printStackTrace();
+        }finally {
+
+        }
+        return -1;
     }
 }

demo/src/test/java/com/example/demo/circulator/service/EPR_CirService.java

@@ -1,8 +1,10 @@
 package com.example.demo.circulator.service;
 
+import com.example.demo.Dao.paymentMapper;
 import com.example.demo.Dao.productMapper;
 import com.example.demo.Dao.usageDateMapper;
 import com.example.demo.bean.Product;
+import com.example.demo.bean.Repayment;
 import com.example.demo.bean.UsageDate;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.transaction.annotation.Transactional;
@@ -12,25 +14,35 @@ import javax.annotation.PostConstruct;
 public class EPR_CirService extends CirService{
     @Autowired
     private usageDateMapper usageDateMapper;
+    private paymentMapper paymentMapper;
     private productMapper productMapper;
 
     @Transactional //数据库与事物的一致性
     public double NextCirculator(long checkNum){
+        try{
             UsageDate usageDate = usageDateMapper.selectUsageDateByCheckNum(checkNum);
+            Repayment repayment = paymentMapper.selectPepaymentBycheckNum(checkNum);
             int year = usageDate.getYear();
             double amount = usageDate.getAmount();
             long productNum = usageDate.getProductNum();
 
             Product product = productMapper.selectProductByProductNum(productNum);
             float intrate = product.getIntrate();
-        double rep_amount = 0;
+            double rep_amount = repayment.getRepAmount();
             intrate /= 12;
             int month = year*12;
             double next_principal_and_interest = amount/month + (amount - rep_amount) * intrate;
             return next_principal_and_interest;
+        }catch(Exception e){
+            e.printStackTrace();
+        }finally {
+
+        }
+        return -1;
     }
 
     public double SumCirculator(long productNum,double amount,int year){
+        try{
             Product product = productMapper.selectProductByProductNum(productNum);
             float intrate = product.getIntrate();
             intrate /= 12;
@@ -39,5 +51,11 @@ public class EPR_CirService extends CirService{
             double last_principal_and_interest = amount/month + amount*(1-(month-1)/month)*intrate;
             double principal_and_interest = (first_principal_and_interest + last_principal_and_interest)*month/2;
             return principal_and_interest;
+        }catch(Exception e){
+            e.printStackTrace();
+        }finally {
+
+        }
+        return -1;
     }
 }

demo/src/test/java/com/example/demo/circulator/service/PayCirService.java

@@ -0,0 +1,40 @@
+package com.example.demo.circulator.service;
+
+import com.example.demo.Dao.paymentMapper;
+import com.example.demo.Dao.transMapper;
+import com.example.demo.Dao.usageDateMapper;
+import com.example.demo.bean.Repayment;
+import com.example.demo.bean.Transaction;
+import com.example.demo.bean.UsageDate;
+
+public class PayCirService {
+    private usageDateMapper usageDateMapper;
+    private paymentMapper paymentMapper;
+    private transMapper transMapper;
+
+    public int payAmountCirculator(long checkNum,double pay){
+        try{
+            Repayment repayment = paymentMapper.selectPepaymentBycheckNum(checkNum);
+            UsageDate usageDate= usageDateMapper.selectUsageDateByCheckNum(checkNum);
+            double rep_amount = repayment.getRepAmount();
+            long userNum = usageDate.getUserNum();
+            int bankNum = usageDate.getBankNum();
+            double amount = usageDate.getAmount();
+            int year = usageDate.getYear();
+
+            Transaction transaction = new Transaction(checkNum,userNum,bankNum,pay);
+            transMapper.addTransaction(transaction);
+
+            rep_amount = pay - amount/(year*12);
+            repayment.setRepAmount(rep_amount);
+            repayment.setRepSum(pay);
+            paymentMapper.updateRepayment(repayment);
+            return 1;
+        }catch(Exception e){
+            e.printStackTrace();
+        }finally {
+
+        }
+        return 0;
+    }
+}

demo/src/test/java/com/example/demo/circulator/service/controller/NextCirController.java

@@ -30,7 +30,12 @@ public class NextCirController {
                 break;
         }
         double next_principal_and_intrate = cirService.NextCirculator(checkNum);
+        if(next_principal_and_intrate>=0){
             request.setAttribute("next",next_principal_and_intrate);
+        }else{
+            return "/计算失败";
+        }
+
         return "/next";
     }
 }

demo/src/test/java/com/example/demo/circulator/service/controller/PayCirController.java

@@ -0,0 +1,21 @@
+package com.example.demo.circulator.service.controller;
+
+import com.example.demo.circulator.service.PayCirService;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.PostMapping;
+
+@Controller
+public class PayCirController {
+    PayCirService payCirService;
+
+    @PostMapping("/pay")
+    public String payAmountCir(long checkNum,double pay){
+        int result = payCirService.payAmountCirculator(checkNum,pay);
+        if(result==1){
+            return "/还款成功";
+        }else{
+            return"/还款失败";
+        }
+
+    }
+}

demo/src/test/java/com/example/demo/circulator/service/controller/SumCirController.java

@@ -33,7 +33,12 @@ public class SumCirController {
                 break;
         }
         double sum_principal_and_intrate = cirService.SumCirculator(productNum,amount,year);
+        if(sum_principal_and_intrate>=0){
             request.setAttribute("sum",sum_principal_and_intrate);
+        }else{
+            return "/计算失败";
+        }
+
         return "/circulator";
     }
 }