springboot上传下载文件

在yml配置相关内容

spring:
  #404
  mvc:
    throw-exception-if-no-handler-found: true
    #静态资源
    static-path-pattern: /**
  resources:
    #静态资源
    static-locations: file:${img.location}

在我们配置404异常添加的配置要关掉(也就是说想用静态资源,就要放弃404异常的统一捕获,解决方案有:http://blog.springcloud.cn/sc/wk2/)

spring:
  #404
  mvc:
    throw-exception-if-no-handler-found: true
  resources:
    add-mappings: false

上传文件:

 前端:

<form enctype="multipart/form-data" id="uploadForm">
    <input type="file" name="uploadFile" id="upload_file" style="margin-bottom:10px;">
    <input type="button" id="uploadPicButton" value="上传" onclick="uploadImage()">
</form>


var pic = $('#upload_file')[0].files[0];
        var fd = new FormData();
        var data = {
            header:{
                token:"1212",
                reqOrg:"1212"
            },
            body :{
                spaceClassId:1
            }
        }
        //fd.append('uploadFile', pic);
        fd.append('file', pic);
        fd.append('data', JSON.stringify(data));     //这里维持着是restful的形式
        $.ajax({
            url:'/resources/insertResources',
            type:"post",
            // Form数据
            data: fd,
            cache: false,
            contentType: false,                    //不能用json了
            processData: false,
            success:function(data){
                console.log("ddd")
            }
        });

后端(用@RequestParam("file")接受参数,不能用@RequestBoby接受字符穿,我的方案是传@RequestParam然后自己来转bean

 @PostMapping("/insertResources")
    @ResponseBody
    public SuccessResponse<Object> insertResources(@RequestParam("file") MultipartFile file, @RequestParam("data") String dataRequest) {
        DataRequest<SpaceClassHomework> spacePicDataRequest = JSON.parseObject(dataRequest, new TypeReference<DataRequest<SpaceClassHomework>>() {
        });
        resourcesService.insertResources(file, spacePicDataRequest.getBody());
        return new SuccessResponse<Object>(null);
    }

服务端 新的方法

file.transferTo(dest);
 @Override
    public void insertResources(MultipartFile file, SpaceClassHomework spaceClassHomework) {
        // 获取文件名
        String fileName = file.getOriginalFilename();
        // 获取文件的后缀名
        String suffixName = fileName.substring(fileName.lastIndexOf("."));
        String filePath = uploadDir;
        File dest = new File(filePath + fileName);
        try {
            file.transferTo(dest);
        } catch (IOException e) {
            e.printStackTrace();
            log.error("文件上传失败");
        }
        spaceClassHomework.setSpaceClassFileName(fileName);
        spaceClassHomework.setSpaceClassFilePath(filePath);
        spaceClassHomeworkMapper.insertSelective(spaceClassHomework);

    }

 

 

下载

前端:影响不大

后端:

1,不能和平时一样,加@responseBody

2,浏览器输出名字的时候编码不是utf-8,但是java又是utf-8,所有我用

String fileNameTemp = new String(fileName.getBytes("UTF-8"), "ISO8859-1");
设置两个变量,一个浏览器输出,一个在java操作

3,spring方法,
new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(file), headers, HttpStatus.CREATED);
@GetMapping("/getResources")
    public ResponseEntity<byte[]> getSpaceClass(@RequestParam("spaceClassFileId") String spaceClassFileId
            , HttpServletResponse resp) throws Exception {
        String filePath = uploadDir;
        //获得路径和文件名
        String fileName = resourcesService.getResources(Long.parseLong(spaceClassFileId));
        String fileNameTemp = new String(fileName.getBytes("UTF-8"), "ISO8859-1");
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
        headers.setContentDispositionFormData("attachment", fileNameTemp);
        File file = new File(filePath + fileName);
        return new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(file), headers, HttpStatus.CREATED);

 

posted on 2018-05-07 23:35  Kooing  阅读(171)  评论(0编辑  收藏  举报

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