httpclient远程调用，发送文件

HTTP文件上传实现

最新推荐文章于 2025-02-20 17:18:50 发布

原创最新推荐文章于 2025-02-20 17:18:50 发布 · 299 阅读

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文章标签：

#http #java

本文介绍了一个使用Java实现的HTTP文件上传方法。通过构建HTTP请求并附加文件内容，该方法能够将指定的文件上传到服务器。文章详细展示了如何利用Apache HttpClient库进行文件上传，并处理响应。

public String doHttpUpload(String url, Map map, MultipartFile file) throws Exception {
        String postEndpoint = httpClient + url; //+ "?" + createLinkStringByGet(map);
        File testUploadFile = MultipartFileToFile.multipartFileToFile(file);

        //创建一个可以关闭的连接，相当于打开了一个浏览器
        CloseableHttpClient httpclient = HttpClients.createDefault();

        // build httpentity object and assign the file that need to be uploaded
        HttpEntity postData = MultipartEntityBuilder.create()
            .addTextBody("type", map.get("type").toString(), ContentType.APPLICATION_JSON)
            .addTextBody("code", map.get("code").toString(), ContentType.APPLICATION_JSON)
            .addTextBody("name", map.get("name").toString(), ContentType.APPLICATION_JSON)
            .addTextBody("date", map.get("date").toString(), ContentType.APPLICATION_JSON)
            .addTextBody("mdtId", map.get("mdtId").toString(), ContentType.APPLICATION_JSON)
            .addBinaryBody("file", testUploadFile)
            .build();

        // build http request and assign httpentity object to it that we build above
        HttpUriRequest postRequest = RequestBuilder.post(postEndpoint).setEntity(postData).build();

        try {
            HttpResponse response = httpclient.execute(postRequest);

            //删除转换时生成的临时文件
            MultipartFileToFile.delteTempFile(testUploadFile);

            // BufferedReader br = new BufferedReader(new InputStreamReader((response.getEntity().getContent())));

            if (response.getStatusLine().getStatusCode() != HttpStatus.SC_OK) {
                throw new RuntimeException("Failed : HTTP error code : " + response.getStatusLine().getStatusCode());
            }
            HttpEntity httpEntity = response.getEntity();
            //对httpclient操作的工具类
            String toStringResult = EntityUtils.toString(httpEntity, StandardCharsets.UTF_8);
            //确保流关闭
            EntityUtils.consume(httpEntity);
            return toStringResult;
        } catch (Exception ex) {
            ex.printStackTrace();
            throw ex;
        }
    }