SpringBoot上传文件、视频等

冷不防 2021-09-20 05:36 993阅读 0赞

1、在application.yml文件中设置文件大小(Spring Boot默认文件上传大小为1M，多文档上传中总是出现文件大小超出限度)

spring:
        servlet:
            multipart:
              max-file-size: 1GB
              max-request-size: 1GB

2、在启动类中配置Bean来设置文件大小，并在类上加入@Configuration

/**
         * 文件上传配置
         *
         * @return
         */
        @Bean
        public MultipartConfigElement multipartConfigElement() {
            MultipartConfigFactory factory = new MultipartConfigFactory();
            //  单个数据大小
            factory.setMaxFileSize("10240KB"); // KB,MB
            /// 总上传数据大小
            factory.setMaxRequestSize("102400KB");
            return factory.createMultipartConfig();
        }

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
    <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
    <%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
    <%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
    <%
        String path = request.getContextPath();
    %>
    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="utf-8">
        <title>上传文件到服务器</title>
    </head>
    <body>
    <form action="<%=path %>/upload/upload" method="post" enctype="multipart/form-data">
        <input type="file" name="uploadFile" value="请选择文件">
        <input type="submit" value="上传">
    </form>
    </body>
    </html>

@PostMapping("/upload")
    public String upload(MultipartFile uploadFile, HttpServletRequest request) {
    /*定义文件的存储路径,如下，是在linux和mac上定义的文件路径
    /private/var/folders/8x/4zvnbqmj1w33cqmzrpygzbth0000gn/T/tomcat-docbase.5206733816001100271.8080/uploadFile
    */
    
    	String realPath = request.getSession().getServletContext().getRealPath("/uploadFile/");
    	File dir = new File(realPath);
    	if (!dir.isDirectory()) {//文件目录不存在，就创建一个
    		dir.mkdirs();
    	}
    
    	try {
    	    String filename = uploadFile.getOriginalFilename();
    	    //服务端保存的文件对象
    		File fileServer = new File(dir, filename);
    		System.out.println("file文件真实路径:" + fileServer.getAbsolutePath());
    		//2，实现上传
    		uploadFile.transferTo(fileServer);
    		String filePath = request.getScheme() + "://" +
    				request.getServerName() + ":"
    				+ request.getServerPort()
    				+ "/uploadFile/" + filename;
    		//3，返回可供访问的网络路径
    		return filePath;
    	} catch (IOException e) {
    		e.printStackTrace();
    	}
    	return "上传失败";
    }