文件服务器 实现文件上传

application.properties

#上传文件的真实存在路径
file.upload-path=C://file/
#外部访问地址
file.resourceHandler=/upload

WebAppConfig定义映射路径

package com.fxkj.config;

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 WebAppConfig  implements WebMvcConfigurer {

    @Value("${file.upload-path}")
    private String filePathPrefix;

    @Value("${file.resourceHandler}")
    private String resourceHandler;

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler(resourceHandler + "/**").addResourceLocations("file:///"+filePathPrefix);
    }

}

具体上传代码：

	//此处引用application.properties 中定义的参数
    @Value("${file.upload-path}") 
    private  String filePathPrefix;

    @Value("${file.resourceHandler}")
    private String resourceHandler;   

/**
     * 流下载
     * @param file MultipartFile
     * @param dto 根据自己的业务逻辑调整
     * @param request HttpServletRequest
     */
public Result newUpload(MultipartFile file, UploadDTO dto, HttpServletRequest request) {
    try {

        log.info("文件上传参数：{},文件名称：{},文件大小：{}", JsonUtils.write(dto), file.getOriginalFilename(), file.getSize());
        
        //防止文件重名自动替换
        String[] split = file.getOriginalFilename().trim().split("\.");
        String newFileName = split[0] + "_" + System.currentTimeMillis() + "." + split[1];
        
		String pathPrefix = filePathPrefix +"/";
        //根据业务需求拼接文件上传路径：
        //此处生成路径：C:file2021-02-021_1612237804927.jpg
        Path path = Paths.get(FileInfoUtils.generatePath(pathPrefix, dateToStr(new Date(), DateUtils.DATE_PATTERN_DEFAULT), newFileName));

        //定义线程池
        ExecutorService fixedThreadPool = Executors.newFixedThreadPool(3);
        //执行线程 上传文件
        fixedThreadPool.execute(new UploadFileRunable(file, path.toString()));

        //根据自己的业务逻辑处理：
        //拼接文件访问地址：basePath+allPath
        //allPath:	/upload/input_file/2021-02-02/1_1612237804927.jpg
        String allPath = resourceHandler + "/" + fileLocation + "/" + DateUtils.dateToStr(new Date(), DATE_PATTERN_DEFAULT) + "/" + newFileName;
        //basePath:	http://localhost:8085
        String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + request.getContextPath();
        
        return Result.ok();
    } catch (Exception e) {
        log.error("文件上传异常：{}", e);
    }
    return Result.error("文件上传失败！");
}

	//文件按上传日期分类
    public static final String DATE_PATTERN_DEFAULT = "yyyy-MM-dd";
    public static String dateToStr(Date date, String pattern) {
        return new DateTime(date).toString(pattern);
    }