在Apache Commons HttpClient的3.x版本中,可以进行multipart / form-data POST请求(2004年的示例)。不幸的是,这在HttpClient的4.0版本中不再可能。
对于我们的核心活动“ HTTP”,多部分内容超出了范围。我们很乐意使用由其他项目维护的多部分代码,但我对此一无所知。几年前,我们曾尝试将多部分代码移至commons编解码器,但我没有离开那里。Oleg最近提到了另一个包含多部分解析代码的项目,并且可能对我们的多部分格式代码感兴趣。我不知道目前的状态。(http://www.nabble.com/multipart-form-data-in-4.0-td14224819.html)
是否有人知道有任何Java库可以让我编写一个可以发出多部分/表单数据POST请求的HTTP客户端?
我们使用HttpClient 4.x进行多部分文件发布。
更新:从HttpClient 4.3开始,不推荐使用某些类。这是带有新API的代码:
CloseableHttpClient httpClient = HttpClients.createDefault(); HttpPost uploadFile = new HttpPost("..."); MultipartEntityBuilder builder = MultipartEntityBuilder.create(); builder.addTextBody("field1", "yes", ContentType.TEXT_PLAIN); // This attaches the file to the POST: File f = new File("[/path/to/upload]"); builder.addBinaryBody( "file", new FileInputStream(f), ContentType.APPLICATION_OCTET_STREAM, f.getName() ); HttpEntity multipart = builder.build(); uploadFile.setEntity(multipart); CloseableHttpResponse response = httpClient.execute(uploadFile); HttpEntity responseEntity = response.getEntity();
以下是不推荐使用HttpClient 4.0 API的原始代码段:
HttpClient httpclient = new DefaultHttpClient(); HttpPost httppost = new HttpPost(url); FileBody bin = new FileBody(new File(fileName)); StringBody comment = new StringBody("Filename: " + fileName); MultipartEntity reqEntity = new MultipartEntity(); reqEntity.addPart("bin", bin); reqEntity.addPart("comment", comment); httppost.setEntity(reqEntity); HttpResponse response = httpclient.execute(httppost); HttpEntity resEntity = response.getEntity();