springboot整合vue实现上传下载文件

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>