✨Feat: 增加用户登录功能

src/main/java/cn/hezhaohui/thumb/constent/UserConstant.java

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+package cn.hezhaohui.thumb.constent;
+
+public class UserConstant {
+
+    public static final String LOGIN_USER = "login_user";
+}

src/main/java/cn/hezhaohui/thumb/controller/UserController.java

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+package cn.hezhaohui.thumb.controller;
+
+import cn.hezhaohui.thumb.common.BaseResponse;
+import cn.hezhaohui.thumb.common.ResultUtils;
+import cn.hezhaohui.thumb.constent.UserConstant;
+import cn.hezhaohui.thumb.model.entity.User;
+import cn.hezhaohui.thumb.service.UserService;
+import jakarta.annotation.Resource;
+import jakarta.servlet.http.HttpServletRequest;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("user")
+public class UserController {
+    @Resource
+    private UserService userService;
+
+    @GetMapping("/login")
+    public BaseResponse<User> login(long userId, HttpServletRequest request) {
+        User user = userService.getById(userId);
+        request.getSession().setAttribute(UserConstant.LOGIN_USER, user);
+        return ResultUtils.sucess(user);
+    }
+
+    @GetMapping("/get/login")
+    public BaseResponse<User> getLoginUser(HttpServletRequest request) {
+        User loginUser = (User) request.getSession().getAttribute(UserConstant.LOGIN_USER);
+        return ResultUtils.sucess(loginUser);
+    }
+}