今天完成的事情：（一定要写非常细致的内容，比如说学会了盒子模型，了解了Margin）

根据接口文档，使用Spring Rest 编写对应的Controller，日志记录接收参数后，暂时不用写业务逻辑，直接返回JSP，直接用Json Tag-lib 生成假数据

package org.example.controller;

import org.example.model.ApiResponse;
import org.example.model.User;
import org.example.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.ModelAndView;

@Controller
@RequestMapping("/user")
public class UserController {

    @Autowired
    private UserService userService;

    @GetMapping("/{id}")
    public ModelAndView getUser(@PathVariable Integer id) {
        User user = userService.getUserById(id);
        if (user != null) {
            return buildResponse("user/detail", ApiResponse.success(user));
        }
        return buildResponse("user/error", ApiResponse.error(404, "用户不存在"));
    }

    @PostMapping
    public ModelAndView createUser(@RequestBody User user) {
        try {
            int result = userService.addUser(user);
            if (result > 0) {
                return buildResponse("user/result",
                        ApiResponse.success(new UserCreateResult(user.getId())));
            }
            return buildResponse("user/error", ApiResponse.error(500, "创建用户失败"));
        } catch (Exception e) {
            return buildResponse("user/error",
                    ApiResponse.error(400, "参数错误: " + e.getMessage()));
        }
    }

    @PutMapping("/{id}")
    public ModelAndView updateUser(@PathVariable Integer id, @RequestBody User user) {
        try {
            user.setId(id);
            int result = userService.updateUser(user);
            if (result > 0) {
                return buildResponse("user/result",
                        ApiResponse.success(userService.getUserById(id)));
            }
            return buildResponse("user/error", ApiResponse.error(404, "用户不存在"));
        } catch (Exception e) {
            return buildResponse("user/error",
                    ApiResponse.error(400, "更新失败: " + e.getMessage()));
        }
    }

    @DeleteMapping("/{id}")
    public ModelAndView deleteUser(@PathVariable Integer id) {
        int result = userService.deleteUser(id);
        if (result > 0) {
            return buildResponse("user/result", ApiResponse.success(null));
        }
        return buildResponse("user/error", ApiResponse.error(404, "用户不存在"));
    }

    // 辅助方法
    private ModelAndView buildResponse(String viewName, ApiResponse response) {
        ModelAndView mav = new ModelAndView(viewName);
        mav.addObject("jsonData", response);
        return mav;
    }

    // 内部类用于创建响应
    private static class UserCreateResult {
        private final Integer id;

        public UserCreateResult(Integer id) {
            this.id = id;
        }

        // getter
        public Integer getId() {
            return id;
        }
    }
}

明天计划的事情：（一定要写非常细致的内容）

遇到的问题：（遇到什么困难，怎么解决的）

Javac识别不出来

收获：（通过今天的学习，学到了什么知识）