HttpClient请求传输文件到目标项目.MulitPartFile

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已于 2022-05-06 16:05:25 修改

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文章标签： time java 开发语言

于 2022-03-24 20:14:46 首次发布

本文链接：https://blog.youkuaiyun.com/zhang19age_/article/details/123720050

本文介绍了如何使用HttpClient通过MultipartFile实现文件上传到目标服务器，重点讲述了如何处理中文乱码问题，并提供了一段示例代码。涉及到的技术包括HTTP请求、MultipartEntity和字符编码管理。

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HttpClient请求传输文件到目标项目. MulitPartFile

业务需要,需要程序调用文件服务器然后再进行处理文件,回头更新下接受的控制层代码,因为那是另一位同时写的,首先文件是从前端直接传过来的,就是用MulitPartFile接受的文件,不可以使用在之前使用file.transferTo()方法,这样的话在执行下面的代码的时候就会出现文件已经被迁移.

String fileUrl = fileManager + "/fileAPI/uploadFile";//服务器地址.
			CloseableHttpClient httpClient = HttpClients.createDefault();
			HttpPost httpPost = new HttpPost(fileUrl);
			MultipartEntityBuilder builder = MultipartEntityBuilder.create().setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
			builder.setCharset(Charset.forName("UTF-8")).addBinaryBody("files", file.getInputStream(), ContentType.MULTIPART_FORM_DATA, file.getOriginalFilename());
			builder.addTextBody("snapshotID",snapshotID);
			builder.addTextBody("sign", MDX.md5(snapshotID+Constant.SIGN_KEY+ com.bqdata.ad.core.util.DateUtils.formatDate(new Date())).toUpperCase());
			System.out.println(com.bqdata.ad.core.util.DateUtils.formatDate(new Date()));
			//builder.addTextBody("areaMemo",clue.getMemo());
			//这里处理的中文会乱码
			ContentType contentType =ContentType.create(HTTP.PLAIN_TEXT_TYPE,HTTP.UTF_8);
			StringBody stringBody = new StringBody(clue.getMemo(),contentType);
			builder.addPart("areaMemo",stringBody);
			builder.addTextBody("latitudeAndLongitude", clue.getLatitude()+" "+clue.getLongitude());
			builder.addTextBody("daqTime",clue.getDaqTime().toString());
			builder.addTextBody("type",Constant.SNAPSHOT_OUTDOOR_VIDEO);
			HttpEntity httpEntity = builder.build();
			httpPost.setEntity(httpEntity);
			HttpResponse httpResponse = httpClient.execute(httpPost);
			HttpEntity responseEntity = httpResponse.getEntity();
			result= EntityUtils.toString(responseEntity, Charset.forName("UTF-8"));
			System.out.println(result);

嗨害嗨，这里全处理一下乱码的方式

 public static String updateFilesPost(String url, MultipartFile file, Map<String, String> requestMap) {
        url += "/fileAPI/uploadFile";
        String sign = "";
        String result = "";
        CloseableHttpClient httpClient = HttpClients.createDefault();
        HttpPost httpPost = new HttpPost(url);
        logger.info(url);
        try {
            MultipartEntityBuilder builder = MultipartEntityBuilder.create().setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
                builder.setCharset(StandardCharsets.UTF_8)
                       .addBinaryBody("files",file.getInputStream(),ContentType.MULTIPART_FORM_DATA,file.getOriginalFilename());//中转文件输入流以mulitpart/form-data 格式传输。
			//遍历map 给每个可能会乱码的中文进行处理。
            for (Map.Entry<String, String> entry : requestMap.entrySet()) {
                ContentType contentType = ContentType.create(HTTP.PLAIN_TEXT_TYPE, HTTP.UTF_8);
                StringBody stringBody = new StringBody(entry.getValue(), contentType);
                builder.addPart(entry.getKey(), stringBody);
            }
            HttpEntity httpEntity = builder.build();
            httpPost.setEntity(httpEntity);
            HttpResponse httpResponse = httpClient.execute(httpPost);
            HttpEntity responseEntity = httpResponse.getEntity();
            result = EntityUtils.toString(responseEntity, StandardCharsets.UTF_8);
            logger.info(result);
        } catch (IOException e) {
            logger.error("调用文件服务异常");
            e.printStackTrace();
        }
        return result;
    }

接受文件接口方法如下

@RequestMapping(value = "/uploadFile", method = RequestMethod.POST)
    public Response uploadFile(ReceiveFileModel model) {
        // 参数校验
        MultipartFile[] files = model.getFiles();
        if (files != null && files.length == 0) {
            return new Response().failure(RespConstant.ERROR_PARAM.getCode());
            此后省略业务逻辑。。。。。。

可以看出和我们平常写的接口没有什么区别，这里用了一个接受参数的实体，其中files 就是 MultipartFile 类型的变量。

   private String snapshotID;
    private String areaMemo;
    private String latitudeAndLongitude;
    private String daqTime;
    private String sign;
    private MultipartFile[] files;