java文件上传

files:
  upload:
    path: /www/upload/

添加映射

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration
public class InterceptorConfig implements WebMvcConfigurer {

    @Value("${files.upload.path}")
    private String fileUploadPath;

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry)
    {
        /** 本地文件上传路径 */
        registry.addResourceHandler("profile" + "/**").addResourceLocations("file:" + fileUploadPath );
    }

}

    /**
     * 图片上传接口
     *
     * @param file 前端传递过来的文件
     * @return
     * @throws IOException
     */
    @PostMapping("/upload")
    public Result upload(@RequestParam MultipartFile file) throws IOException {
        String originalFilename = file.getOriginalFilename();
        String type = FileUtil.extName(originalFilename);
        String fileName = extractFilename(originalFilename);

        File desc = getAbsoluteFile(fileUploadPath, fileName);
        file.transferTo(desc);
        String pathFileName = getPathFileName(fileUploadPath, fileName);
        return new Result( Constants.CODE_200,pathFileName);
    }

    private final String getPathFileName(String uploadDir, String fileName) throws IOException {
        int dirLastIndex = fileUploadPath.length() + 1;
        String currentDir = StringUtils.substring(uploadDir, dirLastIndex);
        String pathFileName = "profile" + currentDir + "/" + fileName;
        return pathFileName;
    }
    private final File getAbsoluteFile(String uploadDir, String fileName) throws IOException {
        File desc = new File(uploadDir + File.separator + fileName);
        if (!desc.getParentFile().exists()) {
            desc.getParentFile().mkdirs();
        }
        if (!desc.exists()) {
            desc.createNewFile();
        }
        return desc;
    }

    /**
     * 编码文件名
     */
    public final String extractFilename(String originalFilename) {
        String fileName = datePath() + "/" + new Date().getTime()+ "_" + originalFilename;
        return fileName;
    }
    public final String datePath() {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyy/MM/dd");
    }