refactor(sims): 重构JwtInterceptor并修复用户角色加载

- 在JwtInterceptor中新增getUserIdFromReq方法，用于从请求中获取用户ID。
- 在UserController的getSelf方法中使用新方法获取当前用户ID并修复。
- 重构UserService中关于用户角色加载的代码，消除不必要的循环，提高执行效率。
- 修复了在UserService中findUser方法传入空值的问题，并增加用户不存在时的异常处理。

src/main/java/top/suyiiyii/sims/common/JwtInterceptor.java

@@ -57,4 +57,7 @@ public class JwtInterceptor implements HandlerInterceptor {
         request.setAttribute("userId", userId);
         return true;
     }
+    public static  int getUserIdFromReq(HttpServletRequest request){
+        return (int) request.getAttribute("userId");
+    }
 }

src/main/java/top/suyiiyii/sims/controller/UserController.java

@@ -8,6 +8,7 @@ import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.*;
 import top.suyiiyii.sims.common.AuthAccess;
+import top.suyiiyii.sims.common.JwtInterceptor;
 import top.suyiiyii.sims.common.Result;
 import top.suyiiyii.sims.dto.CommonResponse;
 import top.suyiiyii.sims.dto.UserDto;
@@ -100,8 +101,9 @@ public class UserController {
     @Operation(description = "获取当前用户信息")
     @AuthAccess(allowRoles = {"user"})
     @GetMapping("/user/me")
-    public Result<UserDto> getSelf() {
-        UserDto user = userService.findUser(0);
+    public Result<UserDto> getSelf(HttpServletRequest request) {
+        int userId = JwtInterceptor.getUserIdFromReq(request);
+        UserDto user = userService.findUser(userId);
         return Result.success(user);
     }
 

src/main/java/top/suyiiyii/sims/service/UserService.java

@@ -124,14 +124,6 @@ public class UserService {
             UserDto.setUserGroup(user.getUserGroup());
             UserDto.setRoles(new ArrayList<>());
             Integer id = user.getId();
-            List<Role> roles = roleMapper.selectRolesById(id);
-            for (Role role : roles) {
-                Integer roleId = role.getId();
-                // 获取一个角色的名称列表
-                List<String> roleNameList = roleMapper.selectRoleNamesByRoleId(roleId);
-                // 累加角色名称到用户的角色列表中
-                UserDto.getRoles().addAll(roleNameList);
-            }
             UserDtos.add(UserDto);
         }
         return UserDtos;
@@ -141,21 +133,15 @@ public class UserService {
 
         UserDto UserDto = new UserDto();
         User user = userMapper.selectById(id);
+        if (user == null) {
+            throw new ServiceException("用户不存在");
+        }
         UserDto.setUserId(user.getId());
         UserDto.setUsername(user.getUsername());
         UserDto.setGrade(user.getGrade());
         UserDto.setUserGroup(user.getUserGroup());
         UserDto.setRoles(new ArrayList<>());
-        List<Role> roles = roleMapper.selectRolesById(id);
-        for (Role role : roles) {
-            Integer roleId = role.getId();
-            // 获取一个角色的名称列表
-            List<String> roleNameList = roleMapper.selectRoleNamesByRoleId(roleId);
-            // 累加角色名称到用户的角色列表中
-            UserDto.getRoles().addAll(roleNameList);
-        }
-
-
+        //TODO: 获取用户角色
         return UserDto;
     }