feat: 实现管理员设备统计数据计算及导出

pom.xml

@@ -61,6 +61,11 @@
             <version>0.12.6</version>
         </dependency>
 
+        <dependency>
+            <groupId>com.alibaba</groupId>
+            <artifactId>easyexcel</artifactId>
+            <version>4.0.3</version>
+        </dependency>
 
         <dependency>
             <groupId>org.springframework.boot</groupId>

src/main/java/github/benjamin/equipreservebackend/controller/DeviceController.java

@@ -1,19 +1,28 @@
 package github.benjamin.equipreservebackend.controller;
 
+import com.alibaba.excel.EasyExcel;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import github.benjamin.equipreservebackend.entity.Device;
 import github.benjamin.equipreservebackend.response.ResponseResult;
 import github.benjamin.equipreservebackend.service.DeviceService;
 import github.benjamin.equipreservebackend.service.ReservationService;
 import github.benjamin.equipreservebackend.vo.DeviceAdminVO;
+import github.benjamin.equipreservebackend.vo.DeviceStatsVO;
 import github.benjamin.equipreservebackend.vo.DeviceUserVO;
 import github.benjamin.equipreservebackend.vo.TimeRangeVO;
+import jakarta.servlet.http.HttpServlet;
+import jakarta.servlet.http.HttpServletResponse;
 import lombok.RequiredArgsConstructor;
+import org.springframework.format.annotation.DateTimeFormat;
 import org.springframework.security.access.prepost.PreAuthorize;
 import org.springframework.web.bind.annotation.*;
 import org.springframework.web.multipart.MultipartFile;
 
 import java.io.IOException;
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+import java.time.LocalDate;
+import java.time.format.DateTimeFormatter;
 import java.util.List;
 
 @RestController
@@ -45,7 +54,7 @@ public class DeviceController {
     @PreAuthorize("hasRole('DEVICE_ADMIN')")
     @PostMapping("/{userId}")
     public ResponseResult<Device> addDevice(@PathVariable("userId") Long userId,
-                                       @RequestBody Device device) {
+                                            @RequestBody Device device) {
         deviceService.addDevice(userId, device);
         return ResponseResult.success(device);
     }
@@ -69,9 +78,9 @@ public class DeviceController {
     @PreAuthorize("hasRole('DEVICE_ADMIN')")
     @GetMapping("/{userId}")
     public ResponseResult<Page<DeviceAdminVO>> getAdminDevice(@PathVariable("userId") Long userId,
-                                                             @RequestParam(defaultValue = "1") Integer page,
+                                                              @RequestParam(defaultValue = "1") Integer page,
-                                                             @RequestParam(defaultValue = "10") Integer size,
+                                                              @RequestParam(defaultValue = "10") Integer size,
-                                                             @RequestParam(required = false) String name) {
+                                                              @RequestParam(required = false) String name) {
 
         Page<Device> pageRequest = new Page<>(page, size);
         return ResponseResult.success(deviceService.getAdminDevice(pageRequest, userId, name));
@@ -84,4 +93,31 @@ public class DeviceController {
         String imagePath = deviceService.saveImage(id, image);
         return ResponseResult.success(imagePath);
     }
+
+    @PreAuthorize("hasRole('ADMIN')")
+    @GetMapping("/usage-stats")
+    public ResponseResult<List<DeviceStatsVO>> getDeviceUsageStats(@RequestParam @DateTimeFormat(pattern = "yyyy-MM-dd") LocalDate start,
+                                                                   @RequestParam @DateTimeFormat(pattern = "yyyy-MM-dd") LocalDate end) {
+        return ResponseResult.success(deviceService.getDeviceUsageStats(start, end));
+    }
+
+    @PreAuthorize("hasRole('ADMIN')")
+    @GetMapping("/usage-stats/export")
+    public void exportDeviceUsageStats(@RequestParam @DateTimeFormat(pattern = "yyyy-MM-dd") LocalDate start,
+                                       @RequestParam @DateTimeFormat(pattern = "yyyy-MM-dd") LocalDate end,
+                                       HttpServletResponse response) throws IOException {
+        String fileName = String.format("设备使用统计_%s-%s.xlsx", start.format(DateTimeFormatter.ISO_DATE), end.format(DateTimeFormatter.ISO_DATE));
+        String encodedName = URLEncoder.encode(fileName, StandardCharsets.UTF_8);
+        response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
+        response.setCharacterEncoding("utf-8");
+        response.setHeader("Content-Disposition", "attachment;filename=" + encodedName);
+
+        // 查询数据
+        List<DeviceStatsVO> data = deviceService.getDeviceUsageStats(start, end);
+
+        // 使用EasyExcel写入response流
+        EasyExcel.write(response.getOutputStream(), DeviceStatsVO.class)
+                .sheet("设备使用统计")
+                .doWrite(data);
+    }
 }

src/main/java/github/benjamin/equipreservebackend/controller/RoleController.java

@@ -0,0 +1,24 @@
+package github.benjamin.equipreservebackend.controller;
+
+import github.benjamin.equipreservebackend.response.ResponseResult;
+import github.benjamin.equipreservebackend.service.RoleService;
+import github.benjamin.equipreservebackend.vo.RoleVO;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/role")
+@RequiredArgsConstructor
+public class RoleController {
+
+    private final RoleService roleService;
+    @GetMapping
+    public ResponseResult<List<RoleVO>> getRoles() {
+        return ResponseResult.success(roleService.list().stream().map(RoleVO::new).toList());
+    }
+
+}

src/main/java/github/benjamin/equipreservebackend/controller/TeamController.java

@@ -0,0 +1,26 @@
+package github.benjamin.equipreservebackend.controller;
+
+import github.benjamin.equipreservebackend.mapper.TeamMapper;
+import github.benjamin.equipreservebackend.response.ResponseResult;
+import github.benjamin.equipreservebackend.service.TeamService;
+import github.benjamin.equipreservebackend.vo.TeamVO;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.List;
+
+@RestController
+@RequestMapping
+@RequiredArgsConstructor
+public class TeamController {
+
+    private final TeamService teamService;
+
+    @GetMapping("/teams")
+    public ResponseResult<List<TeamVO>> getTeams() {
+        return ResponseResult.success(teamService.getTeams());
+    }
+
+}

src/main/java/github/benjamin/equipreservebackend/controller/UserController.java

@@ -1,5 +1,6 @@
 package github.benjamin.equipreservebackend.controller;
 
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import github.benjamin.equipreservebackend.dto.LoginRequest;
 import github.benjamin.equipreservebackend.dto.UserDTO;
 import github.benjamin.equipreservebackend.entity.Role;
@@ -11,6 +12,7 @@ import github.benjamin.equipreservebackend.utils.JwtUtil;
 import github.benjamin.equipreservebackend.vo.LoginResponse;
 import github.benjamin.equipreservebackend.vo.UserVO;
 import lombok.RequiredArgsConstructor;
+import org.springframework.security.access.prepost.PreAuthorize;
 import org.springframework.web.bind.annotation.*;
 
 import java.util.List;
@@ -37,11 +39,33 @@ public class UserController {
         return ResponseResult.success(userService.getUserVO(id));
     }
 
-    @PatchMapping("/user/{id}")
+    @PutMapping("/user/{id}")
     public ResponseResult<UserVO> updateUser(@PathVariable Long id,
                                              @RequestBody UserDTO dto) {
         userService.updateUser(id, dto);
         return ResponseResult.success(userService.getUserVO(id));
     }
 
+    @PreAuthorize("hasRole('ADMIN')")
+    @PostMapping("/user")
+    public ResponseResult<?> addUser(@RequestBody UserDTO dto) {
+        userService.addUser(dto);
+        return ResponseResult.success();
+    }
+
+    @PreAuthorize("hasRole('ADMIN')")
+    @GetMapping("/user")
+    public ResponseResult<Page<UserVO>> getUserVOs(@RequestParam(defaultValue = "1") Integer page,
+                                                   @RequestParam(defaultValue = "10") Integer size,
+                                                   @RequestParam(required = false) String name) {
+        Page<User> pageRequest = new Page<>(page, size);
+        return ResponseResult.success(userService.getUserVOs(pageRequest, name));
+    }
+
+    @PreAuthorize("hasRole('ADMIN')")
+    @DeleteMapping("/user/{userId}")
+    public ResponseResult<?> deleteUser(@PathVariable("userId") Long userId) {
+        userService.deleteById(userId);
+        return ResponseResult.success();
+    }
 }

src/main/java/github/benjamin/equipreservebackend/dto/UserDTO.java

@@ -5,8 +5,11 @@ import lombok.Data;
 @Data
 public class UserDTO {
 
+    private String username;
     private String name;
     private String phone;
     private String password;
+    private Long teamId;
+    private Long roleId;
 
 }

src/main/java/github/benjamin/equipreservebackend/entity/User.java

@@ -1,12 +1,15 @@
 package github.benjamin.equipreservebackend.entity;
 
 import com.baomidou.mybatisplus.annotation.TableName;
+import github.benjamin.equipreservebackend.dto.UserDTO;
 import lombok.Data;
+import lombok.NoArgsConstructor;
 
 import java.time.LocalDateTime;
 
 @Data
 @TableName("users")
+@NoArgsConstructor
 public class User {
 
     private Long id;
@@ -19,4 +22,12 @@ public class User {
     private LocalDateTime createdTime;
     private LocalDateTime updatedTime;
 
+    public User(UserDTO dto) {
+        this.username = dto.getUsername();
+        this.password = dto.getPassword();
+        this.name = dto.getName();
+        this.phone = dto.getPhone();
+        this.teamId = dto.getTeamId();
+    }
+
 }

src/main/java/github/benjamin/equipreservebackend/entity/UserRole.java

@@ -0,0 +1,17 @@
+package github.benjamin.equipreservebackend.entity;
+
+import com.baomidou.mybatisplus.annotation.TableName;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@TableName("user_roles")
+@NoArgsConstructor
+@AllArgsConstructor
+public class UserRole {
+
+    private Long userId;
+    private Long roleId;
+
+}

src/main/java/github/benjamin/equipreservebackend/mapper/DeviceMapper.java

@@ -2,8 +2,13 @@ package github.benjamin.equipreservebackend.mapper;
 
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 import github.benjamin.equipreservebackend.entity.Device;
+import github.benjamin.equipreservebackend.vo.DeviceStatsVO;
 import org.springframework.stereotype.Repository;
 
+import java.time.LocalDate;
+import java.util.List;
+
 @Repository
 public interface DeviceMapper extends BaseMapper<Device> {
+    List<DeviceStatsVO> getDeviceUsageStats(LocalDate start, LocalDate end);
 }

src/main/java/github/benjamin/equipreservebackend/mapper/UserRoleMapper.java

@@ -0,0 +1,9 @@
+package github.benjamin.equipreservebackend.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import github.benjamin.equipreservebackend.entity.UserRole;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface UserRoleMapper extends BaseMapper<UserRole> {
+}

src/main/java/github/benjamin/equipreservebackend/service/DeviceService.java

@@ -3,10 +3,13 @@ package github.benjamin.equipreservebackend.service;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import github.benjamin.equipreservebackend.entity.Device;
 import github.benjamin.equipreservebackend.vo.DeviceAdminVO;
+import github.benjamin.equipreservebackend.vo.DeviceStatsVO;
 import github.benjamin.equipreservebackend.vo.DeviceUserVO;
 import org.springframework.web.multipart.MultipartFile;
 
 import java.io.IOException;
+import java.time.LocalDate;
+import java.util.List;
 
 public interface DeviceService {
     Page<DeviceUserVO> getUserDevices(Page<Device> pageRequest, String name);
@@ -27,4 +30,6 @@ public interface DeviceService {
      * @return 分页后的设备列表
      */
     Page<DeviceAdminVO> getAdminDevice(Page<Device> pageRequest, Long userId, String name);
+
+    List<DeviceStatsVO> getDeviceUsageStats(LocalDate start, LocalDate end);
 }

src/main/java/github/benjamin/equipreservebackend/service/RoleService.java

@@ -0,0 +1,7 @@
+package github.benjamin.equipreservebackend.service;
+
+import com.baomidou.mybatisplus.extension.service.IService;
+import github.benjamin.equipreservebackend.entity.Role;
+
+public interface RoleService extends IService<Role> {
+}

src/main/java/github/benjamin/equipreservebackend/service/TeamService.java

@@ -1,4 +1,9 @@
 package github.benjamin.equipreservebackend.service;
 
+import github.benjamin.equipreservebackend.vo.TeamVO;
+
+import java.util.List;
+
 public interface TeamService {
+    List<TeamVO> getTeams();
 }

src/main/java/github/benjamin/equipreservebackend/service/UserService.java

@@ -1,5 +1,6 @@
 package github.benjamin.equipreservebackend.service;
 
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import github.benjamin.equipreservebackend.dto.UserDTO;
 import github.benjamin.equipreservebackend.entity.User;
 import github.benjamin.equipreservebackend.security.SecurityUser;
@@ -14,4 +15,10 @@ public interface UserService {
     UserVO getUserVO(Long id);
 
     void updateUser(Long id, UserDTO dto);
+
+    Page<UserVO> getUserVOs(Page<User> pageRequest, String name);
+
+    void deleteById(Long userId);
+
+    void addUser(UserDTO dto);
 }

src/main/java/github/benjamin/equipreservebackend/service/impl/DeviceServiceImpl.java

@@ -17,6 +17,7 @@ import github.benjamin.equipreservebackend.service.ReservationService;
 import github.benjamin.equipreservebackend.utils.FileUtil;
 import github.benjamin.equipreservebackend.utils.PageUtil;
 import github.benjamin.equipreservebackend.vo.DeviceAdminVO;
+import github.benjamin.equipreservebackend.vo.DeviceStatsVO;
 import github.benjamin.equipreservebackend.vo.DeviceUserVO;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
@@ -29,6 +30,7 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.nio.file.StandardCopyOption;
+import java.time.LocalDate;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;
@@ -149,6 +151,11 @@ public class DeviceServiceImpl implements DeviceService {
         return res;
     }
 
+    @Override
+    public List<DeviceStatsVO> getDeviceUsageStats(LocalDate start, LocalDate end) {
+        return deviceMapper.getDeviceUsageStats(start, end);
+    }
+
     private DeviceUserVO buildDeviceVO(Device device, List<Reservation> reservations) {
         DeviceUserVO vo = new DeviceUserVO(device);
         // TODO 显示设备状态逻辑，根据客户需求修改

src/main/java/github/benjamin/equipreservebackend/service/impl/ReservationServiceImpl.java

@@ -16,6 +16,7 @@ import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Service;
 
 import java.time.LocalDate;
+import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
@@ -48,19 +49,15 @@ public class ReservationServiceImpl implements ReservationService {
         LocalDate endTime = now.plusDays(days);
         return reservationMapper.selectList(new LambdaQueryWrapper<Reservation>()
                 .in(Reservation::getDeviceId, devicesIds)
-                .eq(Reservation::getStatus, ReservationStatus.APPROVED)
+                .in(Reservation::getStatus, List.of(ReservationStatus.APPROVED, ReservationStatus.APPROVED_ASSIST))
                 .between(Reservation::getStartTime, now, endTime));
     }
 
     @Override
     public void addReservation(Reservation reservation) {
         User user = userMapper.selectById(reservation.getUserId());
-        Team team = teamMapper.selectById(user.getTeamId());
         Device device = deviceMapper.selectById(reservation.getDeviceId());
 
-        reservation.setApplicantName(user.getName());
-        reservation.setApplicantTeam(team.getName());
-        reservation.setApplicantContact(user.getPhone());
         reservation.setDeviceAdminId(device.getDeviceAdminId());
         reservation.setStatus(String.valueOf(ReservationStatus.PENDING_LEADER));
         reservationMapper.insert(reservation);
@@ -71,6 +68,13 @@ public class ReservationServiceImpl implements ReservationService {
         Page<Reservation> reservations = reservationMapper.selectPage(pageRequest, new LambdaQueryWrapper<Reservation>()
                 .eq(Reservation::getUserId, userId)
                 .orderByDesc(Reservation::getCreatedTime));
+        Page<UserReservationVO> res = PageUtil.copyPage(reservations);
+        if (reservations.getRecords().isEmpty()) {
+            res.setTotal(0);
+            res.setRecords(Collections.EMPTY_LIST);
+            return res;
+        }
+
         // 获取设备名称
         List<Long> deviceIds = reservations.getRecords().stream()
                 .map(Reservation::getDeviceId)
@@ -88,7 +92,7 @@ public class ReservationServiceImpl implements ReservationService {
                 .distinct()
                 .toList();
 
-        Page<UserReservationVO> res = PageUtil.copyPage(reservations);
+
         List<UserReservationVO> vos;
         Map<Long, User> deviceAdminMap = userMapper.selectList(new LambdaQueryWrapper<User>()
                         .in(User::getId, deviceAdminIDs))
@@ -106,7 +110,7 @@ public class ReservationServiceImpl implements ReservationService {
     public List<TimeRangeVO> getUnavailableTimes(Long id) {
         List<Reservation> reservations = reservationMapper.selectList(new LambdaQueryWrapper<Reservation>()
                 .eq(Reservation::getDeviceId, id)
-                .eq(Reservation::getStatus, "APPROVED")
+                .in(Reservation::getStatus, List.of(ReservationStatus.APPROVED, ReservationStatus.APPROVED_ASSIST))
                 .gt(Reservation::getEndTime, LocalDate.now()));
 
         return reservations.stream()

src/main/java/github/benjamin/equipreservebackend/service/impl/RoleServiceImpl.java

@@ -0,0 +1,11 @@
+package github.benjamin.equipreservebackend.service.impl;
+
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import github.benjamin.equipreservebackend.entity.Role;
+import github.benjamin.equipreservebackend.mapper.RoleMapper;
+import github.benjamin.equipreservebackend.service.RoleService;
+import org.springframework.stereotype.Service;
+
+@Service
+public class RoleServiceImpl extends ServiceImpl<RoleMapper, Role> implements RoleService {
+}

src/main/java/github/benjamin/equipreservebackend/service/impl/TeamServiceImpl.java

@@ -0,0 +1,25 @@
+package github.benjamin.equipreservebackend.service.impl;
+
+import github.benjamin.equipreservebackend.entity.Team;
+import github.benjamin.equipreservebackend.mapper.TeamMapper;
+import github.benjamin.equipreservebackend.service.TeamService;
+import github.benjamin.equipreservebackend.vo.TeamVO;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+@RequiredArgsConstructor
+public class TeamServiceImpl implements TeamService {
+
+    private final TeamMapper teamMapper;
+
+    @Override
+    public List<TeamVO> getTeams() {
+
+        List<Team> teams = teamMapper.selectList(null);
+
+        return teams.stream().map(TeamVO::new).toList();
+    }
+}

src/main/java/github/benjamin/equipreservebackend/service/impl/UserServiceImpl.java

@@ -2,18 +2,22 @@ package github.benjamin.equipreservebackend.service.impl;
 
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import github.benjamin.equipreservebackend.dto.UserDTO;
 import github.benjamin.equipreservebackend.entity.Role;
 import github.benjamin.equipreservebackend.entity.Team;
 import github.benjamin.equipreservebackend.entity.User;
+import github.benjamin.equipreservebackend.entity.UserRole;
 import github.benjamin.equipreservebackend.exception.ApiException;
 import github.benjamin.equipreservebackend.mapper.RoleMapper;
 import github.benjamin.equipreservebackend.mapper.TeamMapper;
 import github.benjamin.equipreservebackend.mapper.UserMapper;
+import github.benjamin.equipreservebackend.mapper.UserRoleMapper;
 import github.benjamin.equipreservebackend.response.ResponseCode;
 import github.benjamin.equipreservebackend.security.SecurityUser;
 import github.benjamin.equipreservebackend.service.UserService;
 import github.benjamin.equipreservebackend.utils.JwtUtil;
+import github.benjamin.equipreservebackend.utils.PageUtil;
 import github.benjamin.equipreservebackend.utils.PasswordUtil;
 import github.benjamin.equipreservebackend.vo.UserVO;
 import lombok.RequiredArgsConstructor;
@@ -21,7 +25,10 @@ import org.springframework.stereotype.Service;
 import org.springframework.util.StringUtils;
 
 import java.util.List;
+import java.util.Map;
 import java.util.Objects;
+import java.util.function.Function;
+import java.util.stream.Collectors;
 
 @Service
 @RequiredArgsConstructor
@@ -33,6 +40,8 @@ public class UserServiceImpl implements UserService {
 
     private final TeamMapper teamMapper;
 
+    private final UserRoleMapper userRoleMapper;
+
     private final JwtUtil jwtUtil;
 
     @Override
@@ -66,11 +75,44 @@ public class UserServiceImpl implements UserService {
         LambdaUpdateWrapper<User> wrapper = new LambdaUpdateWrapper<User>()
                 .eq(User::getId, id)
                 .set(StringUtils.hasText(dto.getName()), User::getName, dto.getName())
-                .set(StringUtils.hasText(dto.getPhone()), User::getPhone, dto.getPhone());
+                .set(StringUtils.hasText(dto.getPhone()), User::getPhone, dto.getPhone())
+                .set(StringUtils.hasText(dto.getUsername()),User::getUsername, dto.getUsername())
+                .set(Objects.nonNull(dto.getTeamId()), User::getTeamId, dto.getTeamId());
         if (StringUtils.hasText(dto.getPassword())) {
             String encoded = PasswordUtil.encode(dto.getPassword());
             wrapper.set(User::getPassword, encoded);
         }
         userMapper.update(wrapper);
     }
+
+    @Override
+    public Page<UserVO> getUserVOs(Page<User> pageRequest, String name) {
+        LambdaQueryWrapper<User> wrapper = new LambdaQueryWrapper<User>()
+                .orderByAsc(User::getName);
+        if (StringUtils.hasText(name)) {
+            wrapper.like(User::getName, name);
+        }
+        Page<User> users = userMapper.selectPage(pageRequest, wrapper);
+        Map<Long, Team> teamMap = teamMapper.selectList(null).stream()
+                .collect(Collectors.toMap(Team::getId, Function.identity()));
+        Map<Long, Long> roleMap = userRoleMapper.selectList(null).stream()
+                .collect(Collectors.toMap(UserRole::getUserId, UserRole::getRoleId, (v1, v2) -> v1));
+        Page<UserVO> res = PageUtil.copyPage(users);
+        res.setRecords(users.getRecords().stream().map(u -> new UserVO(u, teamMap, roleMap)).toList());
+        return res;
+    }
+
+    @Override
+    public void deleteById(Long userId) {
+        userMapper.deleteById(userId);
+    }
+
+    @Override
+    public void addUser(UserDTO dto) {
+        String encoded = PasswordUtil.encode(dto.getPassword());
+        dto.setPassword(encoded);
+        User user = new User(dto);
+        userMapper.insert(user);
+        userRoleMapper.insert(new UserRole(user.getId(), dto.getRoleId()));
+    }
 }

src/main/java/github/benjamin/equipreservebackend/vo/DeviceStatsVO.java

@@ -0,0 +1,29 @@
+package github.benjamin.equipreservebackend.vo;
+
+import com.alibaba.excel.annotation.ExcelIgnore;
+import com.alibaba.excel.annotation.ExcelProperty;
+import com.alibaba.excel.annotation.write.style.ColumnWidth;
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
+import lombok.Data;
+
+@Data
+public class DeviceStatsVO {
+
+    @JsonSerialize(using = ToStringSerializer.class)
+    @ExcelIgnore
+    private Long deviceId;
+
+    @ColumnWidth(15)
+    @ExcelProperty("设备名称")
+    private String deviceName;
+
+    @ColumnWidth(15)
+    @ExcelProperty("使用次数")
+    private Integer usageCount;
+
+    @ColumnWidth(20)
+    @ExcelProperty("使用时长(天)")
+    private Integer totalUsageDays;
+
+}

src/main/java/github/benjamin/equipreservebackend/vo/RoleVO.java

@@ -0,0 +1,19 @@
+package github.benjamin.equipreservebackend.vo;
+
+import github.benjamin.equipreservebackend.entity.Role;
+import github.benjamin.equipreservebackend.entity.Team;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+public class RoleVO {
+
+    private String label;
+    private String value;
+
+    public RoleVO(Role r) {
+        this.label = r.getName();
+        this.value = r.getId().toString();
+    }
+}

src/main/java/github/benjamin/equipreservebackend/vo/TeamVO.java

@@ -0,0 +1,18 @@
+package github.benjamin.equipreservebackend.vo;
+
+import github.benjamin.equipreservebackend.entity.Team;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+public class TeamVO {
+
+    private String label;
+    private String value;
+
+    public TeamVO(Team t) {
+        this.label = t.getName();
+        this.value = t.getId().toString();
+    }
+}

src/main/java/github/benjamin/equipreservebackend/vo/UserVO.java

@@ -1,25 +1,47 @@
 package github.benjamin.equipreservebackend.vo;
 
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
 import github.benjamin.equipreservebackend.entity.Team;
 import github.benjamin.equipreservebackend.entity.User;
 import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.NoArgsConstructor;
 
+import java.util.Map;
+
 @Data
 @AllArgsConstructor
 @NoArgsConstructor
 public class UserVO {
 
+    @JsonSerialize(using = ToStringSerializer.class)
+    private Long userId;
     private String username;
     private String team;
+    @JsonSerialize(using = ToStringSerializer.class)
+    private Long teamId;
     private String name;
     private String phone;
+    @JsonSerialize(using = ToStringSerializer.class)
+    private Long roleId;
 
     public UserVO(User u, Team t) {
+        this.userId = u.getId();
         this.username = u.getUsername();
         this.name = u.getName();
         this.phone = u.getPhone();
         this.team = t.getName();
+        this.teamId = u.getId();
+    }
+
+    public UserVO(User u, Map<Long, Team> teamMap, Map<Long, Long> roleMap) {
+        this.userId = u.getId();
+        this.username = u.getUsername();
+        this.name = u.getName();
+        this.phone = u.getPhone();
+        this.team = teamMap.get(u.getTeamId()).getName();
+        this.teamId = u.getTeamId();
+        this.roleId = roleMap.get(u.getId());
     }
 }

src/main/resources/mapper/DeviceMapper.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+
+<mapper namespace="github.benjamin.equipreservebackend.mapper.DeviceMapper">
+
+    <select id="getDeviceUsageStats" resultType="github.benjamin.equipreservebackend.vo.DeviceStatsVO">
+        SELECT
+        d.id AS deviceId,
+        d.name AS deviceName,
+        COUNT(*) AS usageCount,
+        SUM(TIMESTAMPDIFF(DAY, r.start_time, r.end_time)) AS totalUsageDays
+        FROM reservations r
+        JOIN devices d ON r.device_id = d.id
+        WHERE r.status IN ('APPROVED', 'APPROVED_ASSIST')
+        AND r.start_time >= #{start}
+        AND r.end_time &lt; #{end}
+        GROUP BY d.id
+        ORDER BY totalUsageDays DESC
+    </select>
+
+</mapper>