httpclient上传文件

最新推荐文章于 2023-04-14 17:26:31 发布

原创最新推荐文章于 2023-04-14 17:26:31 发布 · 910 阅读

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#file #upload #string #服务器 #jar #c

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本文介绍了一种使用HttpClient进行文件上传的方法，并展示了如何在服务器端接收这些文件。客户端部分使用了commons-httpclient等库来构造POST请求并上传文件，而服务器端则利用DiskFileUpload解析请求并将文件保存到指定目录。

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需要导入的JAR包commons-httpclient-3.1.jar，commons-codec-1.3.jar，commons-logging.jar，commons-fileupload-1.0.jar

模拟客户端

public class httpclient { private static String url = " http://localhost:9000/httpclient/servlet/httpserver " ; public static void main(String[] args) throws IOException { HttpClient client = new HttpClient();

PostMethod filePost = new PostMethod(http://abc);

// 连接最大超时时间 client.getHttpConnectionManager().getParams().setConnectionTimeout(5000);

File file = new File("c:/ddd.txt");

Part[] parts = { new StringPart("param_name", "value"),new FilePart("datafile", file) };

filePost.setRequestEntity(new MultipartRequestEntity(parts,filePost.getParams()));

int statusCode = client.executeMethod(filePost);

filePost.releaseConnection(); } }

模拟服务器端

public class httpserver extends HttpServlet { public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { try { DiskFileUpload uploadFile = new DiskFileUpload(); uploadFile.setRepositoryPath( " d:/ " ); List items = null ; items = uploadFile.parseRequest(request); Iterator iterator = items.iterator(); String saveFile = "" ; while (iterator.hasNext()) { FileItem item = (FileItem) iterator.next(); String fieldName = item.getFieldName(); String fieldValue = "" ; if (fieldName.equals( " datafile " )) { fieldValue = item.getName(); if (fieldValue.length() > 0 && ! fieldValue.equals( "" )) { saveFile = new Date().getTime() + " .txt " ; } File upload_File = new File(saveFile); item.write(upload_File); } } } catch (Exception ex) { } } }