利用 HttpClient 上传文件
文件上传用的是Apache HttpClient 4.3。 /** * Example how to use multipart/form encoded POST request. */ public class ClientMultipartFormPost { public static void main(String[] args) throws Exception { if (args.length != 1) { System.out.println("File path not given"); System.exit(1); } CloseableHttpClient httpclient = HttpClients.createDefault(); try { HttpPost httppost = new HttpPost("http://localhost:8080" + "/servlets-examples/servlet/RequestInfoExample"); FileBody img = new FileBody(new File(args[0])); StringBody filename = new StringBody("A binary file of some kind", ContentType.TEXT_PLAIN); StringBody comment = new StringBody("A binary file of some kind", ContentType.TEXT_PLAIN); HttpEntity reqEntity = MultipartEntityBuilder.create() .addPart("img", img) .addPart("filename", filename) .addPart("comment", comment) .build(); httppost.setEntity(reqEntity); System.out.println("executing request " + httppost.getRequestLine()); CloseableHttpResponse response = httpclient.execute(httppost); try { System.out.println("----------------------------------------"); System.out.println(response.getStatusLine()); HttpEntity resEntity = response.getEntity(); if (resEntity != null) { System.out.println("Response content length: " + resEntity.getContentLength()); } EntityUtils.consume(resEntity); } finally { response.close(); } } finally { httpclient.close(); } } }