简单的Sturts上传文件实现

<? 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 ="upfileForm"  type ="com.form.UpfileForm"   />
    
   </ form-beans >

   < global-exceptions  />
   < global-forwards  />
  
   < action-mappings  >
     < action
       attribute ="upfileForm"    //不清楚作用？？
      input ="/upfile.jsp"
      name ="upfileForm"
      path ="/upfile"
      scope ="request"
      type ="com.action.UpfileAction" >
       < forward  name ="success"  path ="/upfileSuccess.jsp"   />
       < forward  name ="failure"  path ="/upfile.jsp"   />
     </ action >
    

   </ action-mappings >

   < message-resources  parameter ="com.ApplicationResources"   />
</ struts-config >

/**/ /*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package  com.action;

import  javax.servlet.http.HttpServletRequest;
import  javax.servlet.http.HttpServletResponse;
import  org.apache.struts.action.Action;
import  org.apache.struts.action.ActionForm;
import  org.apache.struts.action.ActionForward;
import  org.apache.struts.action.ActionMapping;
import  com.form.UpfileForm;

//手动添加包
import  org.apache.struts.upload.FormFile;
import  java.io. * ;

/** */ /**
 * MyEclipse Struts Creation date: 05-11-2007
 * 
 * XDoclet definition:
 * 
 * @struts.action path="/upfile" name="upfileForm" input="/upfile.jsp"
 *                scope="request" validate="true"
 */
public   class  UpfileAction  extends  Action  ... {
    /**//*
     * Generated Methods
     */

    /** *//**
     * Method execute
     * 
     * @param mapping
     * @param form
     * @param request
     * @param response
     * @return ActionForward
     */
    public ActionForward execute(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response) ...{

        UpfileForm upfileForm = (UpfileForm) form;
        // TODO Auto-generated
        //
        FormFile file1 = upfileForm.getTheFile1();// 取得上传的文件
        

        // 上传
        try ...{

            // 文件大小
            String fileSize = Integer.toString(file1.getFileSize()) + "字节";
            upfileForm.setFileSize(fileSize);
            
            /**//*
             * 取当前系统路径(其中S_Upfile为当前context)
             */
            String filePath = this.getServlet().getServletContext()
                    .getRealPath("/");
            System.out.print("当前系统路径"+filePath);//D:/tomcat5/webapps/S_Upfile
            
            // 上传文件1
            InputStream stream = file1.getInputStream();// 把文件读入

            /**//*
             * 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"/"，应该有更通用的方法，请大家帮忙啊
             */
            //D:/Tomcat5/webapps/S_Upfile/UploadFiles/XX.JPG
            String fileName = filePath + "UploadFiles/" + file1.getFileName();
            upfileForm.setFileName(fileName);// 这里曾经出现过莫名奇妙的错误，出现“UploadFiles访问被拒绝”

            OutputStream bos = new FileOutputStream(fileName);

            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();

        } catch (Exception e) ...{
            System.err.print(e);// 输出至控制台
            // throw new RuntimeException(e.getMessage());
            return mapping.findForward("failure");
        }
        return mapping.findForward("success");

    }

}

<% ... @ page language="java" pageEncoding="gb2312" %>
<% ... @ taglib uri="http://jakarta.apache.org/struts/tags-bean"   prefix="bean" %>
<% ... @ taglib uri="http://jakarta.apache.org/struts/tags-html"    prefix="html" %>

< html >
     < head >
         < title > 用Struts上传文件 </ title >
     </ head >
     < body >
         < h1 >
            用Struts上传文件
         </ h1 >
         < html:errors  />
         < html:form  action ="/upfile"  enctype ="multipart/form-data"     method ="post" >
            文件1 :  < html:file  property ="theFile1"   />
             < html:errors  property ="theFile1"   />
             < br  />



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

/**/ /*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package  com.form;

import  javax.servlet.http.HttpServletRequest;

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

/** */ /**
 * MyEclipse Struts Creation date: 05-11-2007
 * 
 * XDoclet definition:
 * 
 * @struts.form name="upfileForm"
 */
public   class  UpfileForm  extends  ActionForm  ... {
    /**//*
     * Generated fields
     */

    /** *//** theFile1 property */
    private FormFile theFile1=null;

    /** *//** theFile2 property */
    

    private String fileName;// 用来存储上传文件所在的目录
    private String fileSize;

    /**//*
     * Generated Methods
     */
    public ActionErrors validate(ActionMapping mapping,
            HttpServletRequest request) ...{
        
        // 初始化一个ActionErrors对象        
        ActionErrors errors = new ActionErrors();

        if(theFile1==null)...{     //本意是防止未有添加任何文件就上传，但似乎没有用，希望高手来解决
            errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionError(
            "theFile1"));
        }
        
        //可能是防止路径太深（来源与http://dev.csdn.net/article/50/50395.shtm）
        Boolean maxLengthExceeded = (Boolean) request
                .getAttribute(MultipartRequestHandler.ATTRIBUTE_MAX_LENGTH_EXCEEDED);        
        if ((maxLengthExceeded != null) && (maxLengthExceeded.booleanValue()))
        ...{ 
             //向errors添加第1个错误
            errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionError(
                    "maxLengthExceeded"));
        }
        //errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionError("error.null"));
        return errors;// 如果errors不为空,Struts框架就会将请求发会页面

    }

    
    public FormFile getTheFile1() ...{
        return theFile1;
    }

    
    public void setTheFile1(FormFile theFile1) ...{
        this.theFile1 = theFile1;
    }

    
    

    // 这里必须是public否则将会出现“不可视”的错误
    public String getFileName() ...{
        return fileName;
    }

    public void setFileName(String fileName) ...{
        this.fileName = fileName;
    }

    public String getFileSize() ...{
        return fileSize;
    }

    public void setFileSize(String fileSize) ...{
        this.fileSize = fileSize;
    }

}

<% @ page language = " java "  pageEncoding = " gb2312 " %>

<% @ taglib uri = " http://jakarta.apache.org/struts/tags-bean "  prefix = " bean "   %>
<% @ taglib uri = " http://jakarta.apache.org/struts/tags-html "  prefix = " html "   %>
<% @ taglib uri = " http://jakarta.apache.org/struts/tags-logic "  prefix = " logic "   %>
<% @ taglib uri = " http://jakarta.apache.org/struts/tags-tiles "  prefix = " tiles "   %>
<% @ taglib uri = " http://jakarta.apache.org/struts/tags-template "  prefix = " template "   %>
<% @ taglib uri = " http://jakarta.apache.org/struts/tags-nested "  prefix = " nested "   %>

<! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" >
< html:html  locale ="true" >
   < head >
     < html:base  />
    
     < title > 上传成功 </ title >

     < meta  http-equiv ="pragma"  content ="no-cache" >
     < meta  http-equiv ="cache-control"  content ="no-cache" >
     < meta  http-equiv ="expires"  content ="0" >     
     < meta  http-equiv ="keywords"  content ="keyword1,keyword2,keyword3" >
     < meta  http-equiv ="description"  content ="This is my page" >
     <!--
    <link rel="stylesheet" type="text/css" href="styles.css">
     -->

   </ head >
  
   < body > 文件已被上传至
   < bean:write  name ="upfileForm"  property ="fileName" />< br >  //upfileForm不要写错，否则会出现“XXXBean不能找到”的错误
   < bean:write  name ="upfileForm"  property ="fileSize" />< br >
   </ body >
</ html:html >