feat(hrm): 添加请假统计功能

- 在控制器中新增 /stats 接口用于获取请假统计数据
- 新增 HrmLeaveStatsVo 数据传输对象定义统计结构
- 在数据访问层添加多个统计查询方法，包括按类型、部门、月份统计
- 实现服务层统计业务逻辑，包括请假汇总、分类统计、员工状态统计
- 配置 MyBatis 映射文件实现各维度统计 SQL 查询
- 添加员工总数和请假中员工数的统计功能

fad-hrm/src/main/java/com/ruoyi/hrm/controller/HrmLeaveReqController.java

@@ -9,6 +9,7 @@ import com.ruoyi.common.enums.BusinessType;
 import com.ruoyi.hrm.domain.HrmLeaveReq;
 import com.ruoyi.hrm.domain.bo.HrmLeaveReqBo;
 import com.ruoyi.hrm.domain.vo.HrmLeaveReqVo;
+import com.ruoyi.hrm.domain.vo.HrmLeaveStatsVo;
 import com.ruoyi.hrm.service.IHrmLeaveReqService;
 import lombok.RequiredArgsConstructor;
 import org.springframework.validation.annotation.Validated;
@@ -59,4 +60,9 @@ public class HrmLeaveReqController extends BaseController {
     public R<List<HrmLeaveReqVo>> all(HrmLeaveReqBo bo) {
         return R.ok(service.queryList(bo));
     }
+
+    @GetMapping("/stats")
+    public R<HrmLeaveStatsVo> stats() {
+        return R.ok(service.getLeaveStats());
+    }
 }

fad-hrm/src/main/java/com/ruoyi/hrm/domain/vo/HrmLeaveStatsVo.java

@@ -0,0 +1,69 @@
+package com.ruoyi.hrm.domain.vo;
+
+import lombok.Data;
+
+import java.io.Serializable;
+import java.math.BigDecimal;
+import java.util.List;
+
+@Data
+public class HrmLeaveStatsVo implements Serializable {
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * 总请假申请数
+     */
+    private Integer totalLeaveRequests;
+
+    /**
+     * 总请假时长(小时)
+     */
+    private BigDecimal totalLeaveHours;
+
+    /**
+     * 按请假类型统计
+     */
+    private List<LeaveTypeStats> leaveByType;
+
+    /**
+     * 按部门统计
+     */
+    private List<DeptStats> leaveByDept;
+
+    /**
+     * 按月份统计(本年)
+     */
+    private List<MonthStats> leaveByMonth;
+
+    /**
+     * 总员工数
+     */
+    private Integer totalEmployees;
+
+    /**
+     * 请假中员工数
+     */
+    private Integer leavingEmployees;
+
+    @Data
+    public static class LeaveTypeStats {
+        private String leaveType;
+        private Integer count;
+        private BigDecimal totalHours;
+    }
+
+    @Data
+    public static class DeptStats {
+        private Long deptId;
+        private String deptName;
+        private Integer count;
+        private BigDecimal totalHours;
+    }
+
+    @Data
+    public static class MonthStats {
+        private String month; // YYYY-MM
+        private Integer count;
+        private BigDecimal totalHours;
+    }
+}

fad-hrm/src/main/java/com/ruoyi/hrm/mapper/HrmLeaveReqMapper.java

@@ -5,10 +5,13 @@ import com.ruoyi.common.core.mapper.BaseMapperPlus;
 import com.ruoyi.hrm.domain.HrmLeaveReq;
 import com.ruoyi.hrm.domain.bo.HrmLeaveReqBo;
 import com.ruoyi.hrm.domain.vo.HrmLeaveReqVo;
+import com.ruoyi.hrm.domain.vo.HrmLeaveStatsVo;
+import org.apache.ibatis.annotations.MapKey;
 import org.apache.ibatis.annotations.Param;
 import org.apache.ibatis.session.RowBounds;
 
 import java.util.List;
+import java.util.Map;
 
 public interface HrmLeaveReqMapper extends BaseMapperPlus<HrmLeaveReqMapper, HrmLeaveReq, HrmLeaveReqVo> {
 
@@ -17,4 +20,17 @@ public interface HrmLeaveReqMapper extends BaseMapperPlus<HrmLeaveReqMapper, Hrm
     List<HrmLeaveReqVo> selectVoWithProjectByPage(IPage<HrmLeaveReqVo> page, @Param("bo") HrmLeaveReqBo bo);
 
     List<HrmLeaveReqVo> selectVoWithProjectList(@Param("bo") HrmLeaveReqBo bo);
+
+    // 统计相关方法
+    Map<String, Object> selectLeaveSummary();
+
+    List<Map<String, Object>> selectLeaveByType();
+
+    List<Map<String, Object>> selectLeaveByDept();
+
+    List<Map<String, Object>> selectLeaveByMonth(@Param("year") Integer year);
+
+    Integer selectTotalEmployees();
+
+    Integer selectLeavingEmployees();
 }

fad-hrm/src/main/java/com/ruoyi/hrm/service/IHrmLeaveReqService.java

@@ -5,6 +5,7 @@ import com.ruoyi.common.core.page.TableDataInfo;
 import com.ruoyi.hrm.domain.HrmLeaveReq;
 import com.ruoyi.hrm.domain.bo.HrmLeaveReqBo;
 import com.ruoyi.hrm.domain.vo.HrmLeaveReqVo;
+import com.ruoyi.hrm.domain.vo.HrmLeaveStatsVo;
 
 import java.util.Collection;
 import java.util.List;
@@ -24,4 +25,7 @@ public interface IHrmLeaveReqService {
     Boolean updateByBo(HrmLeaveReqBo bo);
 
     Boolean deleteWithValidByIds(Collection<Long> ids, Boolean isValid);
+
+    // 统计方法
+    HrmLeaveStatsVo getLeaveStats();
 }

fad-hrm/src/main/java/com/ruoyi/hrm/service/impl/HrmLeaveReqServiceImpl.java

@@ -13,6 +13,13 @@ import com.ruoyi.hrm.domain.HrmLeaveReq;
 import com.ruoyi.hrm.domain.bo.HrmFlowStartBo;
 import com.ruoyi.hrm.domain.bo.HrmLeaveReqBo;
 import com.ruoyi.hrm.domain.vo.HrmLeaveReqVo;
+import com.ruoyi.hrm.domain.vo.HrmLeaveStatsVo;
+
+import java.math.BigDecimal;
+import java.time.LocalDate;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
 import com.ruoyi.hrm.mapper.HrmFlowTemplateMapper;
 import com.ruoyi.hrm.mapper.HrmLeaveReqMapper;
 import com.ruoyi.hrm.service.IHrmFlowInstanceService;
@@ -117,6 +124,55 @@ public class HrmLeaveReqServiceImpl implements IHrmLeaveReqService {
         return baseMapper.deleteBatchIds(ids) > 0;
     }
 
+    @Override
+    public HrmLeaveStatsVo getLeaveStats() {
+        HrmLeaveStatsVo stats = new HrmLeaveStatsVo();
+
+        // 获取汇总数据
+        Map<String, Object> summary = baseMapper.selectLeaveSummary();
+        stats.setTotalLeaveRequests(((Long) summary.get("totalRequests")).intValue());
+        stats.setTotalLeaveHours((BigDecimal) summary.get("totalHours"));
+
+        // 按类型统计
+        List<Map<String, Object>> leaveByType = baseMapper.selectLeaveByType();
+        stats.setLeaveByType(leaveByType.stream().map(map -> {
+            HrmLeaveStatsVo.LeaveTypeStats s = new HrmLeaveStatsVo.LeaveTypeStats();
+            s.setLeaveType((String) map.get("leaveType"));
+            s.setCount(((Long) map.get("count")).intValue());
+            s.setTotalHours((BigDecimal) map.get("totalHours"));
+            return s;
+        }).collect(Collectors.toList()));
+
+        // 按部门统计
+        List<Map<String, Object>> leaveByDept = baseMapper.selectLeaveByDept();
+        stats.setLeaveByDept(leaveByDept.stream().map(map -> {
+            HrmLeaveStatsVo.DeptStats s = new HrmLeaveStatsVo.DeptStats();
+            s.setDeptName((String) map.get("deptName"));
+            s.setCount(((Long) map.get("count")).intValue());
+            s.setTotalHours((BigDecimal) map.get("totalHours"));
+            return s;
+        }).collect(Collectors.toList()));
+
+        // 按月份统计（当前年）
+        int currentYear = LocalDate.now().getYear();
+        List<Map<String, Object>> leaveByMonth = baseMapper.selectLeaveByMonth(currentYear);
+        stats.setLeaveByMonth(leaveByMonth.stream().map(map -> {
+            HrmLeaveStatsVo.MonthStats s = new HrmLeaveStatsVo.MonthStats();
+            s.setMonth((String) map.get("month"));
+            s.setCount(((Long) map.get("count")).intValue());
+            s.setTotalHours((BigDecimal) map.get("totalHours"));
+            return s;
+        }).collect(Collectors.toList()));
+
+        // 总员工数
+        stats.setTotalEmployees(baseMapper.selectTotalEmployees());
+
+        // 请假中员工数
+        stats.setLeavingEmployees(baseMapper.selectLeavingEmployees());
+
+        return stats;
+    }
+
     private LambdaQueryWrapper<HrmLeaveReq> buildQueryWrapper(HrmLeaveReqBo bo) {
         LambdaQueryWrapper<HrmLeaveReq> lqw = Wrappers.lambdaQuery();
         lqw.eq(bo.getBizId() != null, HrmLeaveReq::getBizId, bo.getBizId());

fad-hrm/src/main/resources/mapper/HrmLeaveReqMapper.xml

@@ -149,4 +149,64 @@
         </if>
         ORDER BY l.create_time DESC
     </select>
+    <!-- 统计查询 -->
+    <select id="selectLeaveSummary" resultType="java.util.Map">
+        SELECT
+            COUNT(*) as totalRequests,
+            SUM(hours) as totalHours
+        FROM hrm_leave_req
+        WHERE del_flag = 0
+          AND status = 'approved'
+    </select>
+
+    <select id="selectLeaveByType" resultType="java.util.Map">
+        SELECT
+            leave_type as leaveType,
+            COUNT(*) as count,
+            SUM(hours) as totalHours
+        FROM hrm_leave_req
+        WHERE del_flag = 0
+          AND status = 'approved'
+        GROUP BY leave_type
+        ORDER BY totalHours DESC
+    </select>
+
+    <select id="selectLeaveByDept" resultType="java.util.Map">
+        SELECT
+            d.dept_name as deptName,
+            COUNT(l.biz_id) as count,
+            SUM(l.hours) as totalHours
+        FROM hrm_leave_req l
+            JOIN hrm_employee e ON l.emp_id = e.emp_id AND e.del_flag = 0
+            LEFT JOIN sys_dept d ON e.dept_id = d.dept_id AND d.del_flag = '0'
+        WHERE l.del_flag = 0
+          AND l.status = 'approved'
+        GROUP BY d.dept_id, d.dept_name
+        ORDER BY totalHours DESC
+    </select>
+
+    <select id="selectLeaveByMonth" resultType="java.util.Map">
+        SELECT
+            DATE_FORMAT(start_time, '%Y-%m') as month,
+            COUNT(*) as count,
+            SUM(hours) as totalHours
+        FROM hrm_leave_req
+        WHERE del_flag = 0
+          AND status = 'approved'
+          AND YEAR(start_time) = #{year}
+        GROUP BY DATE_FORMAT(start_time, '%Y-%m')
+        ORDER BY month
+    </select>
+
+    <select id="selectTotalEmployees" resultType="java.lang.Integer">
+        SELECT COUNT(*) FROM hrm_employee WHERE del_flag = 0 AND status = 'onboard'
+    </select>
+
+    <select id="selectLeavingEmployees" resultType="java.lang.Integer">
+        SELECT COUNT(DISTINCT l.emp_id)
+        FROM hrm_leave_req l
+        WHERE l.del_flag = 0
+          AND l.status = 'approved'
+          AND NOW() BETWEEN l.start_time AND l.end_time
+    </select>
 </mapper>