利率测试

ruoyi-modules/ruoyi-potenza/src/main/java/com/ruoyi/potenza/controller/BorrowerController.java

@@ -111,6 +111,22 @@ public class BorrowerController extends BaseController {
         return toAjax(tbBorrowerService.updateTbBorrower(tbBorrower));
     }
 
+    @PostMapping("/borrowerInserts")
+    public AjaxResult borrowerInserts(@RequestBody TbBorrower tbBorrower)
+    {
+        return toAjax(tbBorrowerService.borrowerInserts(tbBorrower));
+    }
+
+
+    @PostMapping("/loans")
+    public AjaxResult loans(@RequestBody TbBorrower tbBorrower)
+    {
+        return tbBorrowerService.loans(tbBorrower);
+    }
+
+
+
+
 
 
 }

ruoyi-modules/ruoyi-potenza/src/main/java/com/ruoyi/potenza/controller/BorrowerPeriodsController.java

@@ -4,6 +4,7 @@ import java.util.List;
 import java.io.IOException;
 import javax.servlet.http.HttpServletResponse;
 
+import com.ruoyi.potenza.domain.vo.PeriodDetailVo;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.GetMapping;
@@ -64,7 +65,6 @@ public class BorrowerPeriodsController extends BaseController{
     /**
      * 获取贷款周期详细信息
      */
-    @RequiresPermissions("potenza:periods:query")
     @GetMapping(value = "/{periodsById}")
     public AjaxResult getInfo(@PathVariable("periodsId") Long periodsId)
     {
@@ -74,7 +74,6 @@ public class BorrowerPeriodsController extends BaseController{
     /**
      * 新增贷款周期
      */
-    @RequiresPermissions("potenza:periods:add")
     @Log(title = "贷款周期", businessType = BusinessType.INSERT)
     @PostMapping("periodsInsert")
     public AjaxResult add(@RequestBody TbBorrowerPeriods tbBorrowerPeriods)
@@ -85,7 +84,6 @@ public class BorrowerPeriodsController extends BaseController{
     /**
      * 修改贷款周期
      */
-    @RequiresPermissions("potenza:periods:edit")
     @Log(title = "贷款周期", businessType = BusinessType.UPDATE)
     @PutMapping("/periodsUpdate")
     public AjaxResult edit(@RequestBody TbBorrowerPeriods tbBorrowerPeriods)
@@ -96,11 +94,18 @@ public class BorrowerPeriodsController extends BaseController{
     /**
      * 删除贷款周期
      */
-    @RequiresPermissions("potenza:periods:remove")
     @Log(title = "贷款周期", businessType = BusinessType.DELETE)
     @DeleteMapping("/{periodsIds}")
     public AjaxResult remove(@PathVariable Long[] periodsIds)
     {
         return toAjax(tbBorrowerPeriodsService.deleteTbBorrowerPeriodsByPeriodsIds(periodsIds));
     }
+
+
+    @Log(title = "周期详细", businessType = BusinessType.UPDATE)
+    @PostMapping("/detail")
+    public AjaxResult detail(@RequestBody PeriodDetailVo periodDetailVo)
+    {
+        return tbBorrowerPeriodsService.detail(periodDetailVo);
+    }
 }

ruoyi-modules/ruoyi-potenza/src/main/java/com/ruoyi/potenza/domain/TbBorrowerPeriods.java

@@ -36,6 +36,8 @@ public class TbBorrowerPeriods implements Serializable {
      */
     private String updateBy;
 
+    private Double  rateInterest;
+
     /**
      * 删除状态0：存在，2：删除
      */

ruoyi-modules/ruoyi-potenza/src/main/java/com/ruoyi/potenza/domain/vo/PeriodDetailVo.java

@@ -0,0 +1,20 @@
+package com.ruoyi.potenza.domain.vo;
+
+import lombok.Data;
+
+import java.io.Serializable;
+
+/**
+ * @author 木子
+ * @version 1.0
+ * @description: TODO
+ * @date 2023/1/15 20:39
+ */
+@Data
+public class PeriodDetailVo implements Serializable {
+    private Double borrowerMoney;
+
+    private Integer wayId;
+
+    private Integer periodsId;
+}

ruoyi-modules/ruoyi-potenza/src/main/java/com/ruoyi/potenza/domain/vo/TbBorrowerVo.java

@@ -0,0 +1,94 @@
+package com.ruoyi.potenza.domain.vo;
+
+import com.baomidou.mybatisplus.annotation.IdType;
+import com.baomidou.mybatisplus.annotation.TableField;
+import com.baomidou.mybatisplus.annotation.TableId;
+import lombok.Data;
+
+import java.io.Serializable;
+import java.util.Date;
+
+/**
+ * @author 木子
+ * @version 1.0
+ * @description: TODO
+ * @date 2023/1/15 19:26
+ */
+@Data
+public class TbBorrowerVo implements Serializable {
+
+    private Integer borrowerId;
+
+    /**
+     * 用户ID
+     */
+    private Integer userId;
+
+    /**
+     * 用户名称
+     */
+    private String userName;
+
+    /**
+     * 产品ID
+     */
+    private Integer productId;
+
+    /**
+     * 默认为最高可以借款金额
+     */
+    private Double borrowerMoney;
+
+    /**
+     * 贷款周期ID
+     */
+    private Integer periodsId;
+
+    /**
+     * 贷款方式ID 0:等额本息 6000   1:等额本金 6000 1000 第一个月60000*利率 第二个月 5000*利率
+     */
+    private Integer wayId;
+
+    /**
+     * 借款用途
+     */
+    private String borrowerPurpose;
+
+    /**
+     *   1： 待审核  2：贷款成功 3:贷款失败
+     */
+    private Integer borrowerState;
+
+    /**
+     * 放款人
+     */
+    private Integer loanerId;
+
+    /**
+     * 创建者
+     */
+    private String createBy;
+
+    /**
+     * 更新者
+     */
+    private String updateBy;
+
+    /**
+     * 删除状态0：存在，2：删除
+     */
+    private Integer delFlag;
+
+    /**
+     * 创建时间
+     */
+    private Date createTime;
+
+    /**
+     * 更新时间
+     */
+    private Date updateTime;
+
+
+
+}

ruoyi-modules/ruoyi-potenza/src/main/java/com/ruoyi/potenza/service/TbBorrowerPeriodsService.java

@@ -1,7 +1,9 @@
 package com.ruoyi.potenza.service;
 
+import com.ruoyi.common.core.web.domain.AjaxResult;
 import com.ruoyi.potenza.domain.TbBorrowerPeriods;
 import com.baomidou.mybatisplus.extension.service.IService;
+import com.ruoyi.potenza.domain.vo.PeriodDetailVo;
 
 import java.util.List;
 
@@ -58,4 +60,6 @@ public interface TbBorrowerPeriodsService extends IService<TbBorrowerPeriods> {
      * @return 结果
      */
     public int deleteTbBorrowerPeriodsByPeriodsId(Long periodsId);
+
+    AjaxResult detail(PeriodDetailVo periodDetailVo);
 }

ruoyi-modules/ruoyi-potenza/src/main/java/com/ruoyi/potenza/service/TbBorrowerService.java

@@ -51,5 +51,7 @@ public interface TbBorrowerService extends IService<TbBorrower> {
     public int updateTbBorrower(TbBorrower tbBorrower);
 
 
+    int borrowerInserts(TbBorrower tbBorrower);
 
+    AjaxResult loans(TbBorrower tbBorrower);
 }

ruoyi-modules/ruoyi-potenza/src/main/java/com/ruoyi/potenza/service/impl/TbBorrowerPeriodsServiceImpl.java

@@ -2,25 +2,31 @@ package com.ruoyi.potenza.service.impl;
 
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import com.ruoyi.common.core.utils.DateUtils;
+import com.ruoyi.common.core.web.domain.AjaxResult;
 import com.ruoyi.potenza.domain.TbBorrowerPeriods;
+import com.ruoyi.potenza.domain.vo.PeriodDetailVo;
 import com.ruoyi.potenza.service.TbBorrowerPeriodsService;
 import com.ruoyi.potenza.mapper.TbBorrowerPeriodsMapper;
+import com.ruoyi.potenza.utils.AverageCapitalPlusInterestUtils;
+import com.ruoyi.potenza.utils.AverageCapitalUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
 import java.util.List;
 
 /**
-* @author 86155
+ * @author 86155
-* @description 针对表【tb_borrower_periods(贷款周期表)】的数据库操作Service实现
+ * @description 针对表【tb_borrower_periods(贷款周期表)】的数据库操作Service实现
-* @createDate 2023-01-13 15:56:37
+ * @createDate 2023-01-13 15:56:37
-*/
+ */
 @Service
 public class TbBorrowerPeriodsServiceImpl extends ServiceImpl<TbBorrowerPeriodsMapper, TbBorrowerPeriods>
         implements TbBorrowerPeriodsService{
+
     @Autowired
     private TbBorrowerPeriodsMapper tbBorrowerPeriodsMapper;
 
+
     /**
      * 查询贷款周期
      *
@@ -95,6 +101,33 @@ public class TbBorrowerPeriodsServiceImpl extends ServiceImpl<TbBorrowerPeriodsM
         return tbBorrowerPeriodsMapper.deleteTbBorrowerPeriodsByPeriodsId(periodsId);
     }
 
+    @Override
+    public AjaxResult detail(PeriodDetailVo periodDetailVo) {
+
+        //查询利率
+        Integer periodsId = periodDetailVo.getPeriodsId();
+        long periodsid = periodsId.longValue();
+        TbBorrowerPeriods tbBorrowerPeriods = tbBorrowerPeriodsMapper.selectTbBorrowerPeriodsByPeriodsId(periodsid);
+        if(tbBorrowerPeriods==null){
+            return AjaxResult.error();
+        }
+        Integer wayId = periodDetailVo.getWayId();
+        //等额本息
+        if(wayId==0){
+            double principalInterestCount = AverageCapitalPlusInterestUtils.
+                    getPrincipalInterestCount(periodDetailVo.getBorrowerMoney(),
+                            tbBorrowerPeriods.getRateInterest()/100,
+                            tbBorrowerPeriods.getPeriodsName());
+            return AjaxResult.success(principalInterestCount);
+        }
+        //等额本金
+        double principalInterestCount = AverageCapitalUtils.
+                getPrincipalInterestCount(periodDetailVo.getBorrowerMoney(),
+                        tbBorrowerPeriods.getRateInterest()/100,
+                        tbBorrowerPeriods.getPeriodsName());
+        return AjaxResult.success(principalInterestCount);
+    }
+
 }
 
 

ruoyi-modules/ruoyi-potenza/src/main/java/com/ruoyi/potenza/service/impl/TbBorrowerPlanServiceImpl.java

@@ -3,6 +3,7 @@ package com.ruoyi.potenza.service.impl;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import com.ruoyi.common.core.utils.DateUtils;
 import com.ruoyi.potenza.domain.TbBorrowerPlan;
+import com.ruoyi.potenza.mapper.TbBorrowerPeriodsMapper;
 import com.ruoyi.potenza.service.TbBorrowerPlanService;
 import com.ruoyi.potenza.mapper.TbBorrowerPlanMapper;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -18,6 +19,7 @@ import java.util.List;
 @Service
 public class TbBorrowerPlanServiceImpl extends ServiceImpl<TbBorrowerPlanMapper, TbBorrowerPlan>
     implements TbBorrowerPlanService{
+
     @Autowired
     private TbBorrowerPlanMapper tbBorrowerPlanMapper;
 

ruoyi-modules/ruoyi-potenza/src/main/java/com/ruoyi/potenza/service/impl/TbBorrowerServiceImpl.java

@@ -1,12 +1,19 @@
 package com.ruoyi.potenza.service.impl;
 
+import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import com.ruoyi.common.core.utils.DateUtils;
 import com.ruoyi.common.core.web.domain.AjaxResult;
 import com.ruoyi.potenza.domain.TbBorrower;
+import com.ruoyi.potenza.domain.TbBorrowerPeriods;
 import com.ruoyi.potenza.domain.vo.IdVo;
+import com.ruoyi.potenza.domain.vo.TbBorrowerVo;
+import com.ruoyi.potenza.mapper.TbBorrowerPeriodsMapper;
 import com.ruoyi.potenza.service.TbBorrowerService;
 import com.ruoyi.potenza.mapper.TbBorrowerMapper;
+import com.ruoyi.potenza.utils.AverageCapitalPlusInterestUtils;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.BeanUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
@@ -18,12 +25,16 @@ import java.util.List;
 * @createDate 2023-01-13 15:56:37
 */
 @Service
+@Slf4j
 public class TbBorrowerServiceImpl extends ServiceImpl<TbBorrowerMapper, TbBorrower>
     implements TbBorrowerService{
 
     @Autowired
     private TbBorrowerMapper tbBorrowerMapper;
 
+    @Autowired
+    private TbBorrowerPeriodsMapper tbBorrowerPeriodsMapper;
+
     @Override
     public List<?> pageList(TbBorrower tbBorrower) {
        List<TbBorrower> list= tbBorrowerMapper.pageList();
@@ -36,14 +47,6 @@ public class TbBorrowerServiceImpl extends ServiceImpl<TbBorrowerMapper, TbBorro
         return AjaxResult.success("删除成功");
     }
 
-
-
-    /**
-     * 查询贷款
-     *
-     * @param borrowerId 贷款主键
-     * @return 贷款
-     */
     @Override
     public TbBorrower selectTbBorrowerByBorrowerId(Long borrowerId)
     {
@@ -88,7 +91,44 @@ public class TbBorrowerServiceImpl extends ServiceImpl<TbBorrowerMapper, TbBorro
         return tbBorrowerMapper.updateTbBorrower(tbBorrower);
     }
 
+    @Override
+    public int borrowerInserts(TbBorrower tbBorrower) {
+        return 0;
+    }
+
+    @Override
+    public AjaxResult loans(TbBorrower tbBorrower) {
+
+        //判断 用户 能否借款
+
+
+        //判断同一个人 只能借一个产品
+        LambdaQueryWrapper<TbBorrower> wrapper=new LambdaQueryWrapper<>();
+        wrapper.eq(TbBorrower::getUserId,tbBorrower.getUserId());
+        wrapper.eq(TbBorrower::getProductId,tbBorrower.getProductId());
+        TbBorrower tbBorrower1 = tbBorrowerMapper.selectOne(wrapper);
+        if(tbBorrower1!=null){
+            return AjaxResult.error("请先还款");
+        }
+        Integer periodsId = tbBorrower.getPeriodsId();
+        long periodsid = periodsId.longValue();
+        //查询利率
+        TbBorrowerPeriods tbBorrowerPeriods = tbBorrowerPeriodsMapper.selectTbBorrowerPeriodsByPeriodsId(periodsid);
+
+        double perMonthPrincipalInterest = AverageCapitalPlusInterestUtils.
+                getPerMonthPrincipalInterest(tbBorrower.getBorrowerMoney(),
+                                            tbBorrowerPeriods.getRateInterest()/100,
+                                            tbBorrowerPeriods.getPeriodsName());
+
 
+        double principalInterestCount = AverageCapitalPlusInterestUtils.
+                getPrincipalInterestCount(tbBorrower.getBorrowerMoney(),
+                        tbBorrowerPeriods.getRateInterest() / 100,
+                        tbBorrowerPeriods.getPeriodsName());
+
+        log.info("---------"+principalInterestCount);
+        return AjaxResult.success("添加成功");
+    }
 
 
 }

ruoyi-modules/ruoyi-potenza/src/main/java/com/ruoyi/potenza/utils/AverageCapitalPlusInterestUtils.java

@@ -0,0 +1,141 @@
+package com.ruoyi.potenza.utils;
+
+import java.math.BigDecimal;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+
+
+import java.math.BigDecimal;
+import java.util.HashMap;
+import java.util.Map;
+
+ * @description: TODO
+ * @author  木子
+ * @date 2023/1/15 19:17
+ * @version 1.0
+ */
+public class AverageCapitalPlusInterestUtils {
+    /**
+     * 等额本息计算获取还款方式为等额本息的每月偿还本金和利息
+     * <p>
+     * 公式：每月偿还本息=〔贷款本金×月利率×(1＋月利率)＾还款月数〕÷〔(1＋月利率)＾还款月数-1〕
+     *
+     * @param invest   总借款额（贷款本金）
+     * @param yearRate 年利率
+     * @param month    还款总月数
+     * @return 每月偿还本金和利息, 不四舍五入，直接截取小数点最后两位
+     */
+    public static double getPerMonthPrincipalInterest(double invest, double yearRate, int totalmonth) {
+        double monthRate = yearRate / 12;
+        BigDecimal monthIncome = new BigDecimal(invest)
+                .multiply(new BigDecimal(monthRate * Math.pow(1 + monthRate, totalmonth)))
+                .divide(new BigDecimal(Math.pow(1 + monthRate, totalmonth) - 1), 2, BigDecimal.ROUND_DOWN);
+        return monthIncome.doubleValue();
+    }
+
+    /**
+     * 等额本息计算获取还款方式为等额本息的每月偿还利息
+     * <p>
+     * 公式：每月偿还利息=贷款本金×月利率×〔(1+月利率)^还款月数-(1+月利率)^(还款月序号-1)〕÷〔(1+月利率)^还款月数-1〕
+     *
+     * @param invest   总借款额（贷款本金）
+     * @param yearRate 年利率
+     * @param month    还款总月数
+     * @return 每月偿还利息
+     */
+    public static Map<Integer, BigDecimal> getPerMonthInterest(double invest, double yearRate, int totalmonth) {
+        Map<Integer, BigDecimal> map = new HashMap<Integer, BigDecimal>();
+        double monthRate = yearRate / 12;
+        BigDecimal monthInterest;
+        for (int i = 1; i < totalmonth + 1; i++) {
+            BigDecimal multiply = new BigDecimal(invest).multiply(new BigDecimal(monthRate));
+            BigDecimal sub = new BigDecimal(Math.pow(1 + monthRate, totalmonth)).subtract(new BigDecimal(Math.pow(1 + monthRate, i - 1)));
+            monthInterest = multiply.multiply(sub).divide(new BigDecimal(Math.pow(1 + monthRate, totalmonth) - 1), 6, BigDecimal.ROUND_DOWN);
+            monthInterest = monthInterest.setScale(2, BigDecimal.ROUND_DOWN);
+            map.put(i, monthInterest);
+        }
+        return map;
+    }
+
+    /**
+     * 等额本息计算获取还款方式为等额本息的每月偿还本金
+     *
+     * @param invest   总借款额（贷款本金）
+     * @param yearRate 年利率
+     * @param month    还款总月数
+     * @return 每月偿还本金
+     */
+    public static Map<Integer, BigDecimal> getPerMonthPrincipal(double invest, double yearRate, int totalmonth) {
+        double monthRate = yearRate / 12;
+        BigDecimal monthIncome = new BigDecimal(invest)
+                .multiply(new BigDecimal(monthRate * Math.pow(1 + monthRate, totalmonth)))
+                .divide(new BigDecimal(Math.pow(1 + monthRate, totalmonth) - 1), 2, BigDecimal.ROUND_DOWN);
+        Map<Integer, BigDecimal> mapInterest = getPerMonthInterest(invest, yearRate, totalmonth);
+        Map<Integer, BigDecimal> mapPrincipal = new HashMap<Integer, BigDecimal>();
+
+        for (Map.Entry<Integer, BigDecimal> entry : mapInterest.entrySet()) {
+            mapPrincipal.put(entry.getKey(), monthIncome.subtract(entry.getValue()));
+        }
+        return mapPrincipal;
+    }
+
+    /**
+     * 等额本息计算获取还款方式为等额本息的总利息
+     *
+     * @param invest   总借款额（贷款本金）
+     * @param yearRate 年利率
+     * @param month    还款总月数
+     * @return 总利息
+     */
+    public static double getInterestCount(double invest, double yearRate, int totalmonth) {
+        BigDecimal count = new BigDecimal(0);
+        Map<Integer, BigDecimal> mapInterest = getPerMonthInterest(invest, yearRate, totalmonth);
+
+        for (Map.Entry<Integer, BigDecimal> entry : mapInterest.entrySet()) {
+            count = count.add(entry.getValue());
+        }
+        return count.doubleValue();
+    }
+
+    /**
+     * 应还本金总和
+     *
+     * @param invest   总借款额（贷款本金）
+     * @param yearRate 年利率
+     * @param month    还款总月数
+     * @return 应还本金总和
+     */
+    public static double getPrincipalInterestCount(double invest, double yearRate, int totalmonth) {
+        double monthRate = yearRate / 12;
+        BigDecimal perMonthInterest = new BigDecimal(invest)
+                .multiply(new BigDecimal(monthRate * Math.pow(1 + monthRate, totalmonth)))
+                .divide(new BigDecimal(Math.pow(1 + monthRate, totalmonth) - 1), 2, BigDecimal.ROUND_DOWN);
+        BigDecimal count = perMonthInterest.multiply(new BigDecimal(totalmonth));
+        count = count.setScale(2, BigDecimal.ROUND_DOWN);
+        return count.doubleValue();
+    }
+
+
+    /**
+     * @param args
+     */
+    public static void main(String[] args) {
+        double invest = 20000; // 本金
+        int month = 12;
+        double yearRate = 0.15; // 年利率
+        double perMonthPrincipalInterest = getPerMonthPrincipalInterest(invest, yearRate, month);
+        System.out.println("等额本息---每月还款本息：" + perMonthPrincipalInterest);
+        Map<Integer, BigDecimal> mapInterest = getPerMonthInterest(invest, yearRate, month);
+        System.out.println("等额本息---每月还款利息：" + mapInterest);
+        Map<Integer, BigDecimal> mapPrincipal = getPerMonthPrincipal(invest, yearRate, month);
+        System.out.println("等额本息---每月还款本金：" + mapPrincipal);
+        double count = getInterestCount(invest, yearRate, month);
+        System.out.println("等额本息---总利息：" + count);
+        double principalInterestCount = getPrincipalInterestCount(invest, yearRate, month);
+        System.out.println("等额本息---应还本息总和：" + principalInterestCount);
+
+    }
+}
+

ruoyi-modules/ruoyi-potenza/src/main/java/com/ruoyi/potenza/utils/AverageCapitalUtils.java

@@ -0,0 +1,155 @@
+package com.ruoyi.potenza.utils;
+
+import java.math.BigDecimal;
+import java.util.HashMap;
+import java.util.Map;
+/**
+ * @author 木子
+ * @version 1.0
+ * @description: TODO
+ * @date 2023/1/15 20:49
+ */
+public class AverageCapitalUtils {
+    /**
+     * 等额本息计算获取还款方式为等额本息的每月偿还本金和利息
+     *
+     * 公式：每月偿还本息=〔贷款本金×月利率×(1＋月利率)＾还款月数〕÷〔(1＋月利率)＾还款月数-1〕
+     *
+     * @param invest
+     *            总借款额（贷款本金）
+     * @param yearRate
+     *            年利率
+     * @param month
+     *            还款总月数
+     * @return 每月偿还本金和利息,不四舍五入，直接截取小数点最后两位
+     */
+    public static BigDecimal getPerMonthPrincipalInterest(double invest, double yearRate, int totalmonth) {
+        double monthRate = yearRate / 12;
+        BigDecimal monthIncome = new BigDecimal(invest)
+                .multiply(new BigDecimal(monthRate * Math.pow(1 + monthRate, totalmonth)))
+                .divide(new BigDecimal(Math.pow(1 + monthRate, totalmonth) - 1), 2, BigDecimal.ROUND_UP);
+        //return monthIncome.doubleValue();
+        return monthIncome;
+    }
+
+    /**
+     * 等额本息计算获取还款方式为等额本息的每月偿还利息
+     *
+     * 公式：每月偿还利息=贷款本金×月利率×〔(1+月利率)^还款月数-(1+月利率)^(还款月序号-1)〕÷〔(1+月利率)^还款月数-1〕
+     *
+     * @param invest
+     *            总借款额（贷款本金）
+     * @param yearRate
+     *            年利率
+     * @param month
+     *            还款总月数
+     * @return 每月偿还利息
+     */
+    public static Map<Integer, BigDecimal> getPerMonthInterest(double invest, double yearRate, int totalmonth) {
+        Map<Integer, BigDecimal> map = new HashMap<Integer, BigDecimal>();
+        double monthRate = yearRate / 12;
+        BigDecimal monthInterest;
+        for (int i = 1; i < totalmonth + 1; i++) {
+            BigDecimal multiply = new BigDecimal(invest).multiply(new BigDecimal(monthRate));
+            BigDecimal sub = new BigDecimal(Math.pow(1 + monthRate, totalmonth))
+                    .subtract(new BigDecimal(Math.pow(1 + monthRate, i - 1)));
+            monthInterest = multiply.multiply(sub).divide(new BigDecimal(Math.pow(1 + monthRate, totalmonth) - 1), 2,
+                    BigDecimal.ROUND_DOWN);
+            monthInterest = monthInterest.setScale(2, BigDecimal.ROUND_DOWN);
+            map.put(i, monthInterest);
+        }
+        return map;
+    }
+
+    /**
+     * 等额本息计算获取还款方式为等额本息的每月偿还本金
+     *
+     * @param invest
+     *            总借款额（贷款本金）
+     * @param yearRate
+     *            年利率
+     * @param month
+     *            还款总月数
+     * @return 每月偿还本金
+     */
+    public static Map<Integer, BigDecimal> getPerMonthPrincipal(double invest, double yearRate, int totalmonth) {
+        double monthRate = yearRate / 12;
+        BigDecimal monthIncome = new BigDecimal(invest)
+                .multiply(new BigDecimal(monthRate * Math.pow(1 + monthRate, totalmonth)))
+                .divide(new BigDecimal(Math.pow(1 + monthRate, totalmonth) - 1), 2, BigDecimal.ROUND_DOWN);
+        Map<Integer, BigDecimal> mapInterest = getPerMonthInterest(invest, yearRate, totalmonth);
+        Map<Integer, BigDecimal> mapPrincipal = new HashMap<Integer, BigDecimal>();
+
+        for (Map.Entry<Integer, BigDecimal> entry : mapInterest.entrySet()) {
+            mapPrincipal.put(entry.getKey(), monthIncome.subtract(entry.getValue()));
+        }
+        return mapPrincipal;
+    }
+
+    /**
+     * 等额本息计算获取还款方式为等额本息的总利息
+     *
+     * @param invest
+     *            总借款额（贷款本金）
+     * @param yearRate
+     *            年利率
+     * @param month
+     *            还款总月数
+     * @return 总利息
+     */
+    public static double getInterestCount(double invest, double yearRate, int totalmonth) {
+        BigDecimal count = new BigDecimal(0);
+        Map<Integer, BigDecimal> mapInterest = getPerMonthInterest(invest, yearRate, totalmonth);
+
+        for (Map.Entry<Integer, BigDecimal> entry : mapInterest.entrySet()) {
+            count = count.add(entry.getValue());
+        }
+        return count.doubleValue();
+    }
+
+    /**
+     * 应还本金总和
+     *
+     * @param invest
+     *            总借款额（贷款本金）
+     * @param yearRate
+     *            年利率
+     * @param month
+     *            还款总月数
+     * @return 应还本金总和
+     */
+    public static double getPrincipalInterestCount(double invest, double yearRate, int totalmonth) {
+        double monthRate = yearRate / 12;
+        BigDecimal perMonthInterest = new BigDecimal(invest)
+                .multiply(new BigDecimal(monthRate * Math.pow(1 + monthRate, totalmonth)))
+                .divide(new BigDecimal(Math.pow(1 + monthRate, totalmonth) - 1), 2, BigDecimal.ROUND_DOWN);
+        BigDecimal count = perMonthInterest.multiply(new BigDecimal(totalmonth));
+        count = count.setScale(2, BigDecimal.ROUND_DOWN);
+        return count.doubleValue();
+    }
+
+    /**
+     * @param args
+     */
+    public static void main(String[] args) {
+        double invest = 38988; // 本金
+        int month = 12;
+        double yearRate = 0.15; // 年利率
+        BigDecimal perMonthPrincipalInterest = getPerMonthPrincipalInterest(invest, yearRate, month);
+        System.out.println("等额本息---每月还款本息：" + perMonthPrincipalInterest);
+        System.out.println("等额本息---每月还款本息：" + getPerMonthPrincipalInterest(invest, yearRate, 3));
+        System.out.println("等额本息---每月还款本息：" + getPerMonthPrincipalInterest(invest, yearRate, 6));
+        System.out.println("等额本息---每月还款本息：" + getPerMonthPrincipalInterest(invest, yearRate, 9));
+        System.out.println("等额本息---每月还款本息：" + getPerMonthPrincipalInterest(invest, yearRate, 12));
+        System.out.println("等额本息---每月还款本息：" + getPerMonthPrincipalInterest(invest, yearRate, 15));
+        System.out.println("等额本息---每月还款本息：" + getPerMonthPrincipalInterest(invest, yearRate, 18));
+        /*Map<Integer, BigDecimal> mapInterest = getPerMonthInterest(invest, yearRate, month);
+        System.out.println("等额本息---每月还款利息：" + mapInterest);
+        Map<Integer, BigDecimal> mapPrincipal = getPerMonthPrincipal(invest, yearRate, month);
+        System.out.println("等额本息---每月还款本金：" + mapPrincipal);
+        double count = getInterestCount(invest, yearRate, month);
+        System.out.println("等额本息---总利息：" + count);
+        double principalInterestCount = getPrincipalInterestCount(invest, yearRate, month);
+        System.out.println("等额本息---应还本息总和：" + principalInterestCount);*/
+    }
+}

ruoyi-modules/ruoyi-potenza/src/main/resources/mapper/TbBorrowerPeriodsMapper.xml

@@ -7,6 +7,7 @@
     <resultMap type="com.ruoyi.potenza.domain.TbBorrowerPeriods" id="TbBorrowerPeriodsResult">
         <result property="periodsId"    column="periods_id"    />
         <result property="periodsName"    column="periods_name"    />
+        <result property="rateInterest"    column="rate_interest"    />
         <result property="createBy"    column="create_by"    />
         <result property="updateBy"    column="update_by"    />
         <result property="delFlag"    column="del_flag"    />
@@ -15,7 +16,7 @@
     </resultMap>
 
     <sql id="selectTbBorrowerPeriodsVo">
-        select periods_id, periods_name, create_by, update_by, del_flag, create_time, update_time from tb_borrower_periods
+        select periods_id, periods_name,rate_interest, create_by, update_by, del_flag, create_time, update_time from tb_borrower_periods
     </sql>
 
     <select id="selectTbBorrowerPeriodsList" parameterType="com.ruoyi.potenza.domain.TbBorrowerPeriods" resultMap="TbBorrowerPeriodsResult">
@@ -34,6 +35,7 @@
         insert into tb_borrower_periods
         <trim prefix="(" suffix=")" suffixOverrides=",">
             <if test="periodsName != null">periods_name,</if>
+            <if test="rateInterest != null">rate_interest,</if>
             <if test="createBy != null">create_by,</if>
             <if test="updateBy != null">update_by,</if>
             <if test="delFlag != null">del_flag,</if>
@@ -42,6 +44,7 @@
         </trim>
         <trim prefix="values (" suffix=")" suffixOverrides=",">
             <if test="periodsName != null">#{periodsName},</if>
+            <if test="rateInterest != null">#{rateInterest},</if>
             <if test="createBy != null">#{createBy},</if>
             <if test="updateBy != null">#{updateBy},</if>
             <if test="delFlag != null">#{delFlag},</if>
@@ -54,6 +57,7 @@
         update tb_borrower_periods
         <trim prefix="SET" suffixOverrides=",">
             <if test="periodsName != null">periods_name = #{periodsName},</if>
+            <if test="rateInterest != null">rate_interest = #{rateInterest},</if>
             <if test="createBy != null">create_by = #{createBy},</if>
             <if test="updateBy != null">update_by = #{updateBy},</if>
             <if test="delFlag != null">del_flag = #{delFlag},</if>

ruoyi-ui/src/api/potenza/borrower.js

@@ -36,4 +36,15 @@ export function updateBorrower(data) {
 }
 
 
+// 添加贷款
+export function insertBorrower(data) {
+  return request({
+    url: '/potenza/borrower/loans',
+    method: 'post',
+    data: data
+  })
+}
+
+
+
 

ruoyi-ui/src/api/potenza/periods.js

@@ -42,3 +42,12 @@ export function delPeriods(periodsId) {
     method: 'delete'
   })
 }
+
+
+export function detail(data) {
+  return request({
+    url: '/potenza/periods/detail',
+    method: 'post',
+    data: data
+  })
+}

ruoyi-ui/src/views/potenza/loans/index.vue

@@ -0,0 +1,123 @@
+<template>
+    <div class="from">
+
+        <div>
+
+        </div>
+        <div>
+            <h1>贷款中心</h1>
+
+            <el-form :model="ruleForm" :rules="rules" ref="ruleForm" label-width="100px" class="demo-ruleForm">
+                <el-form-item label="借款金额" prop="borrowerMoney">
+                    <el-input v-model="ruleForm.borrowerMoney"></el-input>
+                </el-form-item>
+                <el-form-item label="借款周期" prop="periodsId">
+                    <el-select v-model="ruleForm.periodsId" placeholder="请选择">
+                        <el-option v-for="item in periods" :key="item.periodsId" :label="item.periodsName"
+                            :value="item.periodsId">
+                        </el-option>
+                    </el-select>
+                </el-form-item>
+                <el-form-item label="借款方式" prop="wayId">
+                    <el-select v-model="ruleForm.wayId" placeholder="请选择方式">
+                        <el-option label="等额本息" value=0></el-option>
+                        <el-option label="等额本金" value=1></el-option>
+                    </el-select>
+                </el-form-item>
+                <el-form-item>
+                    <h4>总还款金额:{{ borrowerMoney }}</h4>
+                </el-form-item>
+                <el-form-item label="借款用途" prop="borrowerPurpose">
+                    <el-input v-model="ruleForm.borrowerPurpose"></el-input>
+                </el-form-item>
+                <el-form-item>
+                    <el-button type="primary" @click="submitForm(ruleForm)">借款</el-button>
+                    <el-button>取消</el-button>
+                </el-form-item>
+            </el-form>
+        </div>
+    </div>
+</template>
+
+<script>
+
+
+import { listPeriods, insertBorrower } from "@/api/potenza/periods";
+import { detail } from "@/api/potenza/periods";
+
+export default {
+    data() {
+        return {
+            ruleForm: {
+                borrowerMoney: '',
+                periodsId: null,
+                borrowerPurpose: '',
+                wayId: null,
+                userName: '',
+                userId: null,
+                productId: null
+
+            },
+            periods: [],
+            timer: '',
+            borrowerMoney: '',
+            rules: {
+                borrowerMoney: [{ required: true, message: '请输入活动名称', trigger: 'blur' }],
+                periodsId: [{ required: true, message: '请输入借款周期', trigger: 'blur' }],
+                borrowerPurpose: [{ required: true, message: '请输入借款方式', trigger: 'blur' }],
+                wayId: [{ required: true, message: '请输入借款用途', trigger: 'blur' }],
+            }
+
+        }
+    },
+    methods: {
+        submitForm(formName) {
+            this.$refs[formName].validate((valid) => {
+                if (valid) {
+                    const username = this.$store.state.user.name;
+                    this.ruleForm.userName = username
+                    insertBorrower(this.ruleForm).then(respon => {
+                        console.log(respon)
+                    })
+                } else {
+                    console.log('error submit!!');
+                    return false;
+                }
+            });
+        },
+        listPeriods() {
+            listPeriods().then(response => {
+                console.log(response.rows)
+                this.periods = response.rows
+            });
+        },
+        valChange() {
+            if (this.ruleForm.borrowerMoney != '' && this.ruleForm.periodsId != null && this.ruleForm.wayId != null) {
+                let pram = {}
+                pram.borrowerMoney = this.ruleForm.borrowerMoney
+                pram.periodsId = this.ruleForm.periodsId
+                pram.wayId = this.ruleForm.wayId
+                console.log(pram)
+                detail(pram).then(respon => {
+
+                    this.borrowerMoney = respon.data
+                })
+
+
+            }
+        }
+    },
+    created() {
+        this.listPeriods()
+        this.timer = setInterval(this.valChange, 2000);
+    },
+
+}
+</script>
+
+<style>
+.from {
+    margin: auto;
+    width: 40%;
+}
+</style>