SpringBoot开发十二-账号设置

需求介绍—账号设置

账号设置里面的上传头像（文件）

首先请求必须是一个 POST 请求，其次表单的属性 enctype = “multipart/form-data”

然后就是利用 MultipartFile 处理上传文件。

然后就是访问账号设置页面，上传头像，获取头像。

代码实现

我们的头像上传之后是存放到我们的服务器硬盘之上，所以我们需要在 application.properties配置一下我们的资源上传之后是存放到了哪里

# community
community.path.domain=http://localhost:8080
community.path.upload=f:/nowcoder/data/upload

　　

我们上传完文件最终是需要更新用户的 HeaderUrl，所以 Service 就需要提供一个方法改变这个 URL，然后上传文件的事情我们就在 Controller 里面解决掉，业务层只解决更新路径的这个业务就可以了。

那么在 UserService 里面追加一个方法更新用户的 URL

public int updateHeader(int userId, String headerUrl) {
        return userMapper.updateHeader(userId, headerUrl);
    }

    // 重置密码
    public Map<String, Object> resetPassword(String email, String password) {
        Map<String, Object> map = new HashMap<>();

        // 空值处理
        if (StringUtils.isBlank(email)) {
            map.put("emailMsg", "邮箱不能为空!");
            return map;
        }
        if (StringUtils.isBlank(password)) {
            map.put("passwordMsg", "密码不能为空!");
            return map;
        }

        // 验证邮箱
        User user = userMapper.selectByEmail(email);
        if (user == null) {
            map.put("emailMsg", "该邮箱尚未注册!");
            return map;
        }

        // 重置密码
        password = CommunityUtil.md5(password + user.getSalt());
        userMapper.updatePassword(user.getId(), password);

        map.put("user", user);
        return map;
    }

    // 修改密码
    public Map<String, Object> updatePassword(int userId, String oldPassword, String newPassword) {
        Map<String, Object> map = new HashMap<>();

        // 空值处理
        if (StringUtils.isBlank(oldPassword)) {
            map.put("oldPasswordMsg", "原密码不能为空!");
            return map;
        }
        if (StringUtils.isBlank(newPassword)) {
            map.put("newPasswordMsg", "新密码不能为空!");
            return map;
        }

        // 验证原始密码
        User user = userMapper.selectById(userId);
        oldPassword = CommunityUtil.md5(oldPassword + user.getSalt());
        if (!user.getPassword().equals(oldPassword)) {
            map.put("oldPasswordMsg", "原密码输入有误!");
            return map;
        }

        // 更新密码
        newPassword = CommunityUtil.md5(newPassword + user.getSalt());
        userMapper.updatePassword(userId, newPassword);

        return map;
    }

　　

　　

首先新建一个 UserController 实现对于用户的一些请求

　　

package com.nowcoder.community.controller;


import com.nowcoder.community.annotation.LoginRequired;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.service.UserService;
import com.nowcoder.community.util.CommunityUtil;
import com.nowcoder.community.util.HostHolder;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Map;

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

    private static final Logger logger = LoggerFactory.getLogger(UserController.class);

    @Value("${community.path.upload}")
    private String uploadPath;

    @Value("${community.path.domain}")
    private String domain;

    @Value("${server.servlet.context-path}")
    private String contextPath;

    @Autowired
    private UserService userService;

    @Autowired
    private HostHolder hostHolder;

    @LoginRequired
    @RequestMapping(path = "/setting", method = RequestMethod.GET)
    public String getSettingPage() {
        return "/site/setting";
    }

    @LoginRequired
    @RequestMapping(path = "/upload", method = RequestMethod.POST)
    public String uploadHeader(MultipartFile headerImage, Model model) {
        if (headerImage == null) {
            model.addAttribute("error", "您还没有选择图片!");
            return "/site/setting";
        }

        String fileName = headerImage.getOriginalFilename();
        String suffix = fileName.substring(fileName.lastIndexOf("."));
        if (StringUtils.isBlank(suffix)) {
            model.addAttribute("error", "文件的格式不正确!");
            return "/site/setting";
        }

        // 生成随机文件名
        fileName = CommunityUtil.generateUUID() + suffix;
        // 确定文件存放的路径
        File dest = new File(uploadPath + "/" + fileName);
        try {
            // 存储文件
            headerImage.transferTo(dest);
        } catch (IOException e) {
            logger.error("上传文件失败: " + e.getMessage());
            throw new RuntimeException("上传文件失败,服务器发生异常!", e);
        }

        // 更新当前用户的头像的路径(web访问路径)
        // http://localhost:8080/community/user/header/xxx.png
        User user = hostHolder.getUser();
        String headerUrl = domain + contextPath + "/user/header/" + fileName;
        userService.updateHeader(user.getId(), headerUrl);

        return "redirect:/index";
    }

    @RequestMapping(path = "/header/{fileName}", method = RequestMethod.GET)
    public void getHeader(@PathVariable("fileName") String fileName, HttpServletResponse response) {
        // 服务器存放路径
        fileName = uploadPath + "/" + fileName;
        // 文件后缀
        String suffix = fileName.substring(fileName.lastIndexOf("."));
        // 响应图片
        response.setContentType("image/" + suffix);
        try (
                FileInputStream fis = new FileInputStream(fileName);
                OutputStream os = response.getOutputStream();
        ) {
            byte[] buffer = new byte[1024];
            int b = 0;
            while ((b = fis.read(buffer)) != -1) {
                os.write(buffer, 0, b);
            }
        } catch (IOException e) {
            logger.error("读取头像失败: " + e.getMessage());
        }
    }

    // 修改密码
    @LoginRequired
    @RequestMapping(path = "/updatePassword", method = RequestMethod.POST)
    public String updatePassword(String oldPassword, String newPassword, Model model) {
        User user = hostHolder.getUser();
        Map<String, Object> map = userService.updatePassword(user.getId(), oldPassword, newPassword);
        if (map == null || map.isEmpty()) {
            return "redirect:/logout";
        } else {
            model.addAttribute("oldPasswordMsg", map.get("oldPasswordMsg"));
            model.addAttribute("newPasswordMsg", map.get("newPasswordMsg"));
            return "/site/setting";
        }
    }
}

　　

最后就是处理页面的逻辑了。