文件( 上传与静态资源 ) 静态资源设置

配置文件

#application.yml
spring:
  profiles:
    active: dev

#application-dev.yml
# 文件存储路径
file:
  path: E:\Blog\pic\
  avatar: E:\Blog\avatar\
  file: E:\Blog\file\
  # 文件大小 /M
  maxSize: 100
  avatarMaxSize: 5

#application-prod.yml
# 文件存储路径
file:
  path: /user/****
  avatar: /user/****
  file: /user/****
  # 文件大小 /M
  maxSize: 100
  avatarMaxSize: 5

通过 http://localhost:8080/file/2022-05-09/xxx.jpg 如果设置了 context-path: /api 则 http://localhost:8080/api/file/2022-05-09/xxx.jpg

映射配置文件

@Configuration
@ConfigurationProperties(prefix = "file")
@Data
public class FileProperties {
    private  String path;
    private  String avatar;
    private  String file;
    private  String maxSize;
    private  String avatarMaxSize;
}

配置类

@Configuration
public class WebConfig implements WebMvcConfigurer {
    @Autowired
    private FileProperties fileProperties;

    /**
     * 静态资源
     */
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        String avatarUtl = "file:" + fileProperties.getAvatar().replace("\\","/");
        String pathUtl = "file:" + fileProperties.getPath().replace("\\","/");
        String fileUtl = "file:" + fileProperties.getFile().replace("\\","/");
        registry.addResourceHandler("/static/avatar/**").addResourceLocations(avatarUtl).setCachePeriod(0);
        registry.addResourceHandler("/static/pic/**").addResourceLocations(pathUtl).setCachePeriod(0);
        registry.addResourceHandler("/static/file/**").addResourceLocations(fileUtl).setCachePeriod(0);

        /* 手动处理swagger */
        registry.addResourceHandler("/swagger-ui.html")
            	.addResourceLocations("classpath:/META-INF/resources/");
        registry.addResourceHandler("/webjars/**")
                .addResourceLocations("classpath:/META-INF/resources/webjars/");

        registry.addResourceHandler("/static/static/**")
            	.addResourceLocations("classpath:/META-INF/resources/").setCachePeriod(0);
    }
}

Springboot2 文件上传

单文件上传

先创建一个html表单

<el-upload
  class="avatar-uploader"
  action="https://jsonplaceholder.typicode.com/posts/"
  :show-file-list="false"
  :on-success="handleAvatarSuccess"
  :before-upload="beforeAvatarUpload">
  <img v-if="imageUrl" :src="imageUrl" class="avatar">
  <i v-else class="el-icon-plus avatar-uploader-icon"></i>
</el-upload>

1.获取当前日期

（uploadDate）：String

String uploadDate = new SimpleDateFormat("yyyy-mm-dd").format(new Date());

2.设置要保存到的目录

（savePath）：String 绝对路径！！

• 项目运行时目录：

  ResponseEntity<ApiResult> upload(MultipartFile uploadFile, HttpServletRequest request){
    String savePath = request.getSession().getServletContext().getRealPath("/upload/")+uploaddate;
  }

• 指定存储目录

  在配置文件设置好目录通过@Value("${a.aa.aaa}")读取

      @Value("${file.avater}")
     public String avaterPath; //头像存储目录
      @Value("${file.file}")
     public String filePath; //文件存储目录
  
  ResponseEntity<ApiResult> upload(MultipartFile uploadFile){
    String savePath = avaterPath + "/" + uploaddate;
  }

3.如果目录不存在则创建

File folder = new File(savepath);

if (!folder.isDirectory()){folder.mkdirs();}

4.获取并修改文件名和类型

//原文件名	>>1.jpg 2.txt ...
String oldName = uploadFile.getOriginalFilename();
//原文件后缀 >>.jpg .png .txt ...
String nameType= oldName.substring(oldName.lastIndexOf("."));
//新文件名  >>a1-b2-c3.jpg
String newName = UUID.randomUUID().toString() + nameType;

5.保存文件

try {
    //保存并重命名 .transferTo(new File(路径,重命名))
    uploadFile.transferTo(new File(folder,newName));
    //获取保存后文件访问路径
    String filePath = "/file/" + uploaddate + "/" + newName;
	//返回上传成功后的文件名
    return new ResponseEntity<>( ApiResult.ok(filePath),HttpStatus.OK);
}catch (IOException e){
    return new ResponseEntity<>( ApiResult.failed("文件上传失败"),HttpStatus.FAILED_DEPENDENCY);
}

完整代码

//application.yml
spring:
  profiles:
    active: dev

//application-dev.yml
file:
  avater: E:\shop\pcdev\file
  file: E:\shop\linuxdev\file

@Value("${file.avater}")
String avaterPath;
@Value("${file.file}")
String filePath;

@PostMapping("/upload")
ResponseEntity<ApiResult> upload(MultipartFile uploadFile){
        //获取当前日期 2022-5-9
        String uploaddate = new SimpleDateFormat("yyyy-mm-dd").format(new Date());
        //设置文件保存的文件夹路径
        String savepath = avaterPath + "/" + uploaddate;
        //创建文件夹，当文件夹不存在时
        File folder = new File(savepath);
        if (!folder.isDirectory()){folder.mkdirs();}
        //旧文件名
        String oldName = uploadFile.getOriginalFilename();
        //文件后缀
        String nameType= oldName.substring(oldName.lastIndexOf("."));
        //新文件名
        String newName = UUID.randomUUID().toString() + nameType;
        try {
            //保存并重命名
            uploadFile.transferTo(new File(folder,newName));
            //获取保存后文件访问路径
            String filePath = "/file/" + uploaddate + "/" + newName;
            return new ResponseEntity<>( ApiResult.ok(filePath),HttpStatus.OK);
        }catch (IOException e){
            return null;
        }
    }

示例代码

    @Value("${file.avater}")
    String avaterPath;
    @Value("${file.file}")
    String filePath;

    @PostMapping("/test")
    ResponseEntity testResponseEntity(){
        return new ResponseEntity<>(ApiResult.urlNotFoundMsg("东西没有"), HttpStatus.resolve(ApiResult.urlNotFoundMsg("").getStatus()));
    }
    @PostMapping("/upload")
    ResponseEntity<ApiResult> upload(MultipartFile uploadFile){
        //获取当前日期 2022-5-9
        String uploaddate = new SimpleDateFormat("yyyy-MM-dd").format(new Date());
        //设置文件保存的文件夹路径
        String savepath = avaterPath + "/" + uploaddate;
        //创建文件夹，当文件夹不存在时
        File folder = new File(savepath);
        if (!folder.isDirectory()){folder.mkdirs();}
        //旧文件名
        String oldName = uploadFile.getOriginalFilename();
        //文件后缀
        String nameType= oldName.substring(oldName.lastIndexOf("."));

        if (".jpg".equals(nameType) || ".png".equals(nameType) ||  ".gif".equals(nameType) ||  ".webp".equals(nameType) ||){
            //新文件名
            String newName = UUID.randomUUID().toString() + nameType;
            try {
                //保存并重命名
                uploadFile.transferTo(new File(folder,newName));
                //获取保存后文件访问路径
                String filePath = "/file/" + uploaddate + "/" + newName;
                return new ResponseEntity<>( ApiResult.ok(filePath),HttpStatus.OK);
            }catch (IOException e){
                return null;
            }
        }else {
            return new ResponseEntity<>( ApiResult.failed("文件类型错误"),HttpStatus.FAILED_DEPENDENCY);
        }
    }
}