Struts上传文件

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;

/**
* <p>
* Title:UpLoadForm
* </p>
* <p>
* Copyright: Copyright (c) 2005 techyang http://blog.csdn.net/techyang
* </p>
* @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;

/**
* <p>
* Title:UpLoadAction
* </p>
* <p>
* Copyright: Copyright (c) 2005 techyang http://blog.csdn.net/techyang
* </p>
* @author techyang
* @version 1.0
*/

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");//如果没有指定编码，编码格式为gb2312
             }
             UpLoadForm theForm = (UpLoadForm) form;
             FormFile file = theForm.getTheFile();//取得上传的文件
          
             FormFile file2=theForm.getTheFile2();
             try
             {               
                 /*
                  * 取当前系统路径D:/Tomcat5/webapps/coka/ 其中coka 为当前context
                  */
                 String filePath = this.getServlet().getServletContext()
                 .getRealPath("/");
                 InputStream stream = file.getInputStream();//把文件读入
               
                 ByteArrayOutputStream baos = new ByteArrayOutputStream();
               
                 /*
                  * 建立一个上传文件的输出流 如果是linux系统请把UploadFiles后的"//"换成"/"
                  */
                 OutputStream bos = new FileOutputStream(filePath +
                         "UploadFiles//"+file.getFileName());
                
                 //D:/Tomcat5/webapps/coka/UploadFiles/DSC01508.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);//将文件写入服务器
                 }           
                 bos.close();
                 stream.close();
                
                 InputStream stream2 = file2.getInputStream();//把文件读入
                 ByteArrayOutputStream baos2 = new ByteArrayOutputStream();
                 OutputStream bos2 =   new FileOutputStream(filePath +
                         "UploadFiles//"+file2.getFileName());//建立一个上传文件的输出流
                 int bytesRead2 = 0;
                 byte[] buffer2 = new byte[8192];
                 int i=0;
                 while ((bytesRead2 = stream2.read(buffer2, 0, 8192)) != -1)
                 {
                     bos2.write(buffer2, 0, bytesRead2);//将文件写入服务器
                 }           
                 bos2.close();
                 stream2.close();
                
             } catch (Exception e)
             {
                 System.err.print(e);
             }
             return mapping.findForward("display");
          
     }
}

三。建立上传用的JSP文件 upload.jsp

<%@ taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html" %>
<html:html>
<head>
<title>用Struts上传文件</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>

全文完！