导入依赖(pom.
<!-- 上传下载需要设计到的jar包 --> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.6</version> </dependency> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.3</version> </dependency> <!--servlet-api导入高版本的--> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>4.0.1</version> </dependency> <!-- 图片处理类 --> <dependency> <groupId>net.coobird</groupId> <artifactId>thumbnailator</artifactId> <version>0.4.8</version> </dependency>
全局配置 application.properties
# 上传文件大小spring.servlet.multipart.max-file-size=5MBspring.servlet.multipart.max-request-size=5MB
创建 WebMvcConfig 配置类 静态资源映射
@Configurationpublic class WebMvcConfig implements WebMvcConfigurer { @Override public void addResourceHandlers(ResourceHandlerRegistry registry) { ApplicationHome h = new ApplicationHome(getClass()); File jarF = h.getSource(); String dirPath = jarF.getParentFile().toString()+"/upload/"; String os = System.getProperty("os.name"); if (os.toLowerCase().startsWith("win")) { //如果是Windows系统 registry.addResourceHandler("/upload/**").addResourceLocations("file:"+dirPath); } else { registry.addResourceHandler("/upload/**").addResourceLocations("file:"+dirPath); } }}
文件或图片上传
- 控制层
// 上传文件 @ResponseBody @RequestMapping("/upload") public String fileUpload(@RequestParam("files") MultipartFile files) throws IOException {// // win系统 上传路径保存设置// // 获取项目路径// File projectPath = new File(ResourceUtils.getURL("classpath:").getPath());// // 绝对路径=项目路径+自定义路径// File pathFile = new File(projectPath.getAbsolutePath(), "static/upload/");// if (!pathFile.exists()) {// pathFile.mkdirs();// }// //上传文件地址// UUID uuid = UUID.randomUUID();// File serverFile = new File(pathFile, uuid + "_" + files.getOriginalFilename());// files.transferTo(serverFile);//// String imgPath = ("/upload/" + uuid + "_" + files.getOriginalFilename()).replace("\\", "/");//// return imgPath; // Linux服务器 上传路径保存设置 // 项目路径 /home/www/ File pathFile = new File("/home/www/upload/"); if (!pathFile.exists()) { pathFile.mkdirs(); } //上传文件地址 UUID uuid = UUID.randomUUID(); File serverFile = new File(pathFile, uuid + "_" + files.getOriginalFilename()); files.transferTo(serverFile); String imgPath = ("/upload/" + uuid + "_" + files.getOriginalFilename()).replace("\\", "/"); return imgPath; }
HTML页面 Ajax 无刷新上传
<form action="" class="layui-form" enctype="multipart/form-data" method="post"> <input type="hidden" name="blogImg" id="imgPath" value=""> <div class="form-group"> <label>图片上传</label> <input type='file' style='margin: 5px;' name='files' required><br> <button type="button" class="layui-btn" id="img_upload">上传图片</button> </div> <input type="submit"></form>
JS
//普通图片上传 $('#img_upload').click(function () { var formData = new FormData(); //获取选择的文件 $.each($('input[name="files"]'),function (index,item) { formData.append("files",item.files[0]) }); //发送异步请求 $.ajax({ method:'post', url: '[[@{/user/upload}]]', // 文件上传接口 data:formData, processData: false, contentType:false, success:function (data) { //成功返回触发的方法 $('#imgPath').val(data); alert("上传成功"); }, //请求失败触发的方法 error:function () { alert("上传失败"); } }); });
文件或图片下载
- 控制层
@RequestMapping(value="/download")public String downloads(HttpServletResponse response ,HttpServletRequest request) throws Exception{ //要下载的图片地址 String path = request.getServletContext().getRealPath("/upload"); String fileName = "基础语法.jpg"; //1、设置response 响应头 response.reset(); //设置页面不缓存,清空buffer response.setCharacterEncoding("UTF-8"); //字符编码 response.setContentType("multipart/form-data"); //二进制传输数据 //设置响应头 response.setHeader("Content-Disposition", "attachment;fileName="+URLEncoder.encode(fileName, "UTF-8")); File file = new File(path,fileName); //2、 读取文件--输入流 InputStream input=new FileInputStream(file); //3、 写出文件--输出流 OutputStream out = response.getOutputStream(); byte[] buff =new byte[1024]; int index=0; //4、执行 写出操作 while((index= input.read(buff))!= -1){ out.write(buff, 0, index); out.flush(); } out.close(); input.close(); return null;}
HTML页面
<a href="/download">点击下载</a>
SpringBoot 文件或图片上传与下载就可以了
参考资料:狂神说SpringMVC:文件上传下载
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导入依赖(pom. <!--上传下载需要设计到的jar包--><dependency><groupId>commons-io</groupId><artifactId>commons-io</artifactId><version>2.6</version></dependency>&
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