springboot整合vue实现上传下载文件

https://blog.csdn.net/yhhyhhyhhyhh/article/details/89888953

文章目录

• springboot整合vue实现上传下载文件
• 1上传下载文件api文件
• 2.上传大文件配置
• 3.vue前端主要部分

• 环境
  springboot 1.5.x

  完整代码下载：

  springboot整合vue实现上传下

  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")
  public 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")
  public 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")
  public 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("application/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
  public MultipartConfigElement multipartConfigElement() {
  MultipartConfigFactory config = new MultipartConfigFactory();
  config.setMaxFileSize("1100MB");
  config.setMaxRequestSize("1100MB");
  return config.createMultipartConfig();
  }

• 3.vue前端主要部分

• <template>
  <div style="top:100px;width:300px">
  <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" @click="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 :limit="5" :on-exceed="handleExceed" :file-list="fileList">
  <el-button size="small" type="primary">点击上传</el-button>
  <div slot="tip" class="el-upload__tip">一次文件不超过1Gb</div>
  </el-upload>
  </el-form-item>
  </el-form>

  </div>
  </template>