用struts上傳多個文件的方法 
一。建立ActionForm

package com.cnehu.struts.form;
import javax.servlet.http.HttpServletRequest;

import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.upload.FormFile;
import org.apache.struts.upload.MultipartRequestHandler;

/**
 *  


 * Title:UpLoadForm
 * 


 *  


 * Copyright: Copyright (c) 2005 techyang ;http://blog.csdn.net/techyang
 * 


 * @author techyang
 * @version 1.0
 */

public class UpLoadForm extends ActionForm
{
    public static final String ERROR_PROPERTY_MAX_LENGTH_EXCEEDED = "org.apache.struts.webapp.upload.MaxLengthExceeded";

    protected FormFile theFile;
    protected FormFile theFile2;
    public FormFile getTheFile()
    {
        return theFile;
    }

    public void setTheFile(FormFile theFile)
    {
        this.theFile = theFile;
    }

    public ActionErrors validate(ActionMapping mapping,
            HttpServletRequest request)
    {
        ActionErrors errors = null;
        //has the maximum length been exceeded?
        Boolean maxLengthExceeded = (Boolean) request
                .getAttribute(MultipartRequestHandler.ATTRIBUTE_MAX_LENGTH_EXCEEDED);
        if ((maxLengthExceeded != null) && (maxLengthExceeded.booleanValue()))
        {
            errors = new ActionErrors();
            errors.add(ERROR_PROPERTY_MAX_LENGTH_EXCEEDED, new ActionError(
                    "maxLengthExceeded"));
        }
        return errors;

    }
    /**
     * @return Returns the theFile2.
     */
    public FormFile getTheFile2()
    {
        return theFile2;
    }
    /**
     * @param theFile2 The theFile2 to set.
     */
    public void setTheFile2(FormFile theFile2)
    {
        this.theFile2 = theFile2;
    }
} 
 



二。建立ActionServlet

package com.cnehu.struts.action;

import java.io.*;
import javax.servlet.http.*;
import org.apache.struts.action.*;
import org.apache.struts.upload.FormFile;

import com.cnehu.struts.form.UpLoadForm;

/**
 *  

public class UpLoadAction extends Action
{
    public ActionForward execute(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception
    {
            String encoding = request.getCharacterEncoding();
            if ((encoding != null) && (encoding.equalsIgnoreCase("utf-8")))
            {
                response.setContentType("text/html; charset=gb2312");//如果沒有指定編碼，編碼格式為gb2312
            }
            UpLoadForm theForm = (UpLoadForm) form;
            FormFile file = theForm.getTheFile();//取得上傳的文件
          
            FormFile file2=theForm.getTheFile2();
            try
            {               
                /*
                 * 取當前系統路徑D:Tomcat5webappscoka 其中coka 為當前context
                 */
                String filePath = this.getServlet().getServletContext()
                .getRealPath("/");
                InputStream stream = file.getInputStream();//把文件讀入
               
                ByteArrayOutputStream baos = new ByteArrayOutputStream();
               
                /*
                 * 建立一個上傳文件的輸出流 如果是linux系統請把UploadFiles后的"\"換成"/"
                 */
                OutputStream bos = new FileOutputStream(filePath +
                        "UploadFiles\"+file.getFileName());
                
                //D:Tomcat5webappscokaUploadFilesDSC01508.JPG
              /*  System.out.println(filePath +
                        "UploadFiles\"+file.getFileName());
                System.out.println(filePath);*/
                request.setAttribute("fileName",filePath + "/"
                        + file.getFileName());
                int bytesRead = 0;
                byte[] buffer = new byte[8192];
                while ((bytesRead = stream.read(buffer, 0, 8192)) != -1)
                {
                    bos.write(buffer, 0, bytesRead);//將文件寫入服務器
                }           
                bos.close();
                stream.close(); 


InputStream stream2 = file2.getInputStream();//把文件讀入
                ByteArrayOutputStream baos2 = new ByteArrayOutputStream();
                OutputStream bos2 =  new FileOutputStream(filePath +
                        "UploadFiles\"+file2.getFileName());//建立一個上傳文件的輸出流
                int bytesRead2 = 0;
                byte[] buffer2 = new byte[8192];
                int i=0;
                while ((bytesRead2 = stream2.read(buffer2, 0, 8192)) != -1)
                {
                    bos2.write(buffer2, 0, bytesRead2);//將文件寫入服務器
                }           
                bos2.close();
                stream2.close();
                
            } catch (Exception e)
            {
                System.err.print(e);
            }
            return mapping.findForward("display");
          
    }
}




三。建立上傳用的JSP文件 upload.jsp
 



<%@ taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html" %>
<html:html>
<head>
<title>用Struts上傳文件</title>
</head>
<body>
<html:form action="/uploadsAction" enctype="multipart/form-data">
<html:file property="theFile"/>
<html:file property="theFile2"/>

<html:submit/>
</html:form>
</body>
</html:html> 
 
 

四。配置struts-config.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN" "http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd">
<struts-config>
   <data-sources />
   <form-beans >
     <form-bean name="uploadsForm" type="com.cnehu.struts.form.UpLoadForm" /> 
   </form-beans>

   <global-exceptions />
   <global-forwards >
     
   </global-forwards>

   <action-mappings >
             
      <action name="uploadsForm" type="com.cnehu.struts.action.UpLoadAction" path="/uploadsAction">
 <forward name="display" path="/display.jsp" />
 </action>
    </action-mappings>
          
</struts-config>