springboot整合vue实现上传下载文件

springboot整合vue实现上传下载文件，供大家参考，具体内容如下

环境

springboot 1.5.x

完整代码下载：springboot整合vue实现上传下载

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>

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