<form action="file_upload.action" method="post" enctype="multipart/form-data">

         文件：<input type="file" name="myfile"/>

         <input type="submit" value="上传"/>

     </form>

 package com.xyy.action;

 import java.io.File;

 import java.io.IOException;

 import org.apache.commons.io.FileUtils;

 import com.opensymphony.xwork2.Action;

 public class FileAction {

     private File myfile;    //获取文件本身的数据

     private String myfileFileName;    //获取文件名称,变量名命名规则：域名(myfile)+"FileName"

     private String myfileContentType;    //获取文件类型,变量名命名规则：域名(myfile)+"ContentType"

     public void setMyfile(File myfile) {

         this.myfile = myfile;

     }

     public void setMyfileFileName(String myfileFileName) {

         this.myfileFileName = myfileFileName;

     }

     public File getMyfile() {

         return myfile;

     }

     public String getMyfileFileName() {

         return myfileFileName;

     }

     public String getMyfileContentType() {

         return myfileContentType;

     }

     public void setMyfileContentType(String myfileContentType) {

         this.myfileContentType = myfileContentType;

     }

     public String upload() throws IOException{

         if(myfile != null && myfile.length() != 0){

             //写入C盘权限不够的问题：以管理员身份运行eclipse

             File destFile = new File("C:/"+myfileFileName);

             FileUtils.copyFile(myfile, destFile);

             return Action.SUCCESS;

         }else{

             System.out.println("文件为空！");

             return Action.ERROR;

         }

     }

 }

 <struts>

     <!-- 配置常量 -->

     <constant name="struts.configuration.xml.reload" value="true" />

     <package name="upload-package" extends="struts-default">

         <action name="file_*" class="com.xyy.action.FileAction" method="{1}">

             <result>/upload_ok.jsp</result>

             <result name="error">/upload_err.jsp</result>

         </action>

     </package>

 </struts>