httpurlconnection发送文件到服务端并接收
客户端代码

import java.io.DataInputStream;import java.io.File;import java.io.FileInputStream;import java.io.OutputStream;import java.net.HttpURLConnection;import java.net.URL;/* * @author xk * 上传文件到文件服务器的客户端 */public class FileUploadClient{ public static void main(String[] args) {   try {//   URL url = new URL("http://127.0.0.1:8888/fileSys/getFile.action?filePath=/c/v/b/&fileName=test.zip");   URL url = new URL("http://127.0.0.1:8888/fileSys/getFile.action?filePath=/c/v/b/&fileName=test.zip");   HttpURLConnection conn = (HttpURLConnection)url.openConnection();   // 发送POST请求必须设置如下两行   conn.setDoOutput(true);   conn.setUseCaches(false);   conn.setRequestMethod("POST");   conn.setRequestProperty("Content-Type","text/html");           conn.setRequestProperty("Cache-Control","no-cache");           conn.setRequestProperty("Charsert", "UTF-8");            conn.connect();           conn.setConnectTimeout(10000);           OutputStream out =conn.getOutputStream();   File file = new File("C:\\fileSys\\test.zip");    DataInputStream in = new DataInputStream(new FileInputStream(file));   int bytes = 0;   byte[] buffer = new byte[1024];   while ((bytes = in.read(buffer)) != -1) {   out.write(buffer, 0, bytes);   }   in.close();   out.flush();   out.close();    conn.getInputStream();   conn.disconnect();   } catch (Exception e) {   System.out.println("发送文件出现异常！" + e);   e.printStackTrace();   }}}

import java.io.File;import java.io.FileOutputStream;import java.io.InputStream;import javax.servlet.http.HttpServletRequest;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.Action;import com.opensymphony.xwork2.ActionSupport;import com.property.PropertyUtil;public class GetFileAction extends ActionSupport {private static final long serialVersionUID = -9108080625441081032L;  public String execute() throws Exception   {   String rootPath = PropertyUtil.getProperty("fileSys.properties","fileSys.path");HttpServletRequest request = ServletActionContext.getRequest();String filePath = request.getParameter("filePath");String fileName = request.getParameter("fileName");InputStream input = request.getInputStream(); String fileFullPath = rootPath + filePath + fileName; File file = new File(rootPath + filePath);if(!file.exists()){file.mkdirs();}FileOutputStream fos = new FileOutputStream(fileFullPath);int size = 0;byte[] buffer = new byte[1024];while ((size = input.read(buffer,0,1024)) != -1) {fos.write(buffer, 0, size);}fos.close();input.close();return Action.NONE;   }   }