<!-- 上傳下載需要設計到的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導入高版本的--> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>4.0.1</version> </dependency> <!-- 圖片處理類 --> <dependency> <groupId>net.coobird</groupId> <artifactId>thumbnailator</artifactId> <version>0.4.8</version> </dependency>全局配置 application.properties

# 上傳文件大小spring.servlet.multipart.max-file-size=5MBspring.servlet.multipart.max-request-size=5MB

創建 WebMvcConfig 配置類 靜態資源映射

@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系統 registry.addResourceHandler('/upload/**').addResourceLocations('file:'+dirPath); } else { registry.addResourceHandler('/upload/**').addResourceLocations('file:'+dirPath); } }}文件或圖片上傳

控制層

// 上傳文件 @ResponseBody @RequestMapping('/upload') public String fileUpload(@RequestParam('files') MultipartFile files) throws IOException {// // win系統 上傳路徑保存設置// // 獲取項目路徑// File projectPath = new File(ResourceUtils.getURL('classpath:').getPath());// // 絕對路徑=項目路徑+自定義路徑// File pathFile = new File(projectPath.getAbsolutePath(), 'static/upload/');// if (!pathFile.exists()) {// pathFile.mkdirs();// }// //上傳文件地址// 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服務器 上傳路徑保存設置 // 項目路徑 /home/www/ File pathFile = new File('/home/www/upload/'); if (!pathFile.exists()) { pathFile.mkdirs(); } //上傳文件地址 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頁面

Ajax 無刷新上傳

<form action='' enctype='multipart/form-data' method='post'><input type='hidden' name='blogImg' value=''><div class='form-group'><label>圖片上傳</label><input type=’file’ style=’margin: 5px;’ name=’files’ required><br><button type='button' id='img_upload'>上傳圖片</button></div><input type='submit'></form>

JS

//普通圖片上傳 $(’#img_upload’).click(function () { var formData = new FormData(); //獲取選擇的文件 $.each($(’input[name='files']’),function (index,item) { formData.append('files',item.files[0]) }); //發送異步請求 $.ajax({ method:’post’, url: ’[[@{/user/upload}]]’, // 文件上傳接口 data:formData, processData: false, contentType:false, success:function (data) { //成功返回觸發的方法 $(’#imgPath’).val(data); alert('上傳成功'); }, //請求失敗觸發的方法 error:function () { alert('上傳失敗'); } }); });文件或圖片下載

控制層

@RequestMapping(value='/download')public String downloads(HttpServletResponse response ,HttpServletRequest request) throws Exception{ //要下載的圖片地址 String path = request.getServletContext().getRealPath('/upload'); String fileName = '基礎語法.jpg'; //1、設置response 響應頭 response.reset(); //設置頁面不緩存,清空buffer response.setCharacterEncoding('UTF-8'); //字符編碼 response.setContentType('multipart/form-data'); //二進制傳輸數據 //設置響應頭 response.setHeader('Content-Disposition', 'attachment;fileName='+URLEncoder.encode(fileName, 'UTF-8')); File file = new File(path,fileName); //2、 讀取文件--輸入流 InputStream input=new FileInputStream(file); //3、 寫出文件--輸出流 OutputStream out = response.getOutputStream(); byte[] buff =new byte[1024]; int index=0; //4、執行 寫出操作 while((index= input.read(buff))!= -1){ out.write(buff, 0, index); out.flush(); } out.close(); input.close(); return null;}

HTML頁面

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SpringBoot 文件或圖片上傳與下載就可以了

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