这篇文章给大家介绍springboot中怎么利用vue实现文件上传下载功能，内容非常详细，感兴趣的小伙伴们可以参考借鉴，希望对大家能有所帮助。
1、上传下载文件api文件
设置上传路径，如例子：
private final static String rootPath =System.getProperty(“user.home”)+File.separator+fileDir+File.separator;
api接口：
下载url示例:http://localhost:8080/file/download?fileName=新建文本文档.txt
//上传不要用@Controller,用@RestController@RestController@RequestMapping("/file")pubpc class FileController { private static final Logger logger = LoggerFactory.getLogger(FileController.class); //在文件操作中，不用/或者\最好，推荐使用File.separator private final static String fileDir="files"; private final static String rootPath = System.getProperty("user.home")+File.separator+fileDir+File.separator; @RequestMapping("/upload") pubpc Object uploadFile(@RequestParam("file") MultipartFile[] multipartFiles, final HttpServletResponse response, final HttpServletRequest request){ File fileDir = new File(rootPath); if (!fileDir.exists() && !fileDir.isDirectory()) { fileDir.mkdirs(); } try { if (multipartFiles != null && multipartFiles.length > 0) { for(int i = 0;i<multipartFiles.length;i++){ try { //以原来的名称命名,覆盖掉旧的 String storagePath = rootPath+multipartFiles[i].getOriginalFilename(); logger.info("上传的文件：" + multipartFiles[i].getName() + "," + multipartFiles[i].getContentType() + "," + multipartFiles[i].getOriginalFilename() +"，保存的路径为：" + storagePath); Streams.copy(multipartFiles[i].getInputStream(), new FileOutputStream(storagePath), true); //或者下面的 // Path path = Paths.get(storagePath); //Files.write(path,multipartFiles[i].getBytes()); } catch (IOException e) { logger.error(ExceptionUtils.getFullStackTrace(e)); } } } } catch (Exception e) { return ResultUtil.error(e.getMessage()); } return ResultUtil.success("上传成功!"); } /** * http://localhost:8080/file/download?fileName=新建文本文档.txt * @param fileName * @param response * @param request * @return */ @RequestMapping("/download") pubpc Object downloadFile(@RequestParam String fileName, final HttpServletResponse response, final HttpServletRequest request){ OutputStream os = null; InputStream is= null; try { // 取得输出流 os = response.getOutputStream(); // 清空输出流 response.reset(); response.setContentType("apppcation/x-download;charset=GBK"); response.setHeader("Content-Disposition", "attachment;filename="+ new String(fileName.getBytes("utf-8"), "iso-8859-1")); //读取流 File f = new File(rootPath+fileName); is = new FileInputStream(f); if (is == null) { logger.error("下载附件失败，请检查文件“" + fileName + "”是否存在"); return ResultUtil.error("下载附件失败，请检查文件“" + fileName + "”是否存在"); } //复制 IOUtils.copy(is, response.getOutputStream()); response.getOutputStream().flush(); } catch (IOException e) { return ResultUtil.error("下载附件失败,error:"+e.getMessage()); } //文件的关闭放在finally中 finally { try { if (is != null) { is.close(); } } catch (IOException e) { logger.error(ExceptionUtils.getFullStackTrace(e)); } try { if (os != null) { os.close(); } } catch (IOException e) { logger.error(ExceptionUtils.getFullStackTrace(e)); } } return null; }}
访问：http://localhost:8080
上传：
批量上传：
下载：
2.上传大文件配置
/** * 设置上传大文件大小，配置文件属性设置无效 */ @Bean pubpc MultipartConfigElement multipartConfigElement() { MultipartConfigFactory config = new MultipartConfigFactory(); config.setMaxFileSize("1100MB"); config.setMaxRequestSize("1100MB"); return config.createMultipartConfig(); }
3.vue前端主要部分
<template> <p > <el-form :model="form" label-width="220px"> <el-form-item label="请输入文件名" required> <el-input v-model="form.fileName" auto-complete="off" class="el-col-width" required></el-input> </el-form-item> <el-form-item> <el-button size="small" type="primary" @cpck="handleDownLoad">下载</el-button> </el-form-item> <el-form-item> <el-upload class="upload-demo" :action="uploadUrl" :before-upload="handleBeforeUpload" :on-error="handleUploadError" :before-remove="beforeRemove" multiple :pmit="5" :on-exceed="handleExceed" :file-pst="fileList"> <el-button size="small" type="primary">点击上传</el-button> <p slot="tip" class="el-upload__tip">一次文件不超过1Gb</p> </el-upload> </el-form-item> </el-form> </p></template>
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