jsp\struts1.2\struts2 中文件上传（转）

jsp\struts1.2\struts2 中文件上传

a.在jsp中简单利用Commons-fileupload组件实现
b.在struts1.2中实现
c.在sturts2中实现
现在把Code与大家分享一下..
注:此为三个简单Demo,仅供练习用,并没有做太多上传限制
如有兴趣可以自行查看相关文档说明

一.在JSP环境中利用Commons-fileupload组件实现文件上传
1.页面upload.jsp清单如下:

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<title>The FileUpload Demo</title>

</head>

<body>

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

<p><input type="text" name="fileinfo" value="">文件介绍</p>

<p><input type="file" name="myfile" value="浏览文件"></p>

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

</form>

</body>

</html>

　　注意:在上传表单中,既有普通文本域也有文件上传域

2.FileUplaodServlet.java清单如下:

package org.chris.fileupload;

import java.io.File;

import java.io.IOException;

import java.util.Iterator;

import java.util.List;

import javax.servlet.ServletException;

import javax.servlet.http.*;

import org.apache.commons.fileupload.FileItem;

import org.apache.commons.fileupload.FileItemFactory;

import org.apache.commons.fileupload.disk.DiskFileItemFactory;

import org.apache.commons.fileupload.servlet.ServletFileUpload;

public class FileUplaodServlet extends HttpServlet {

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

doPost(request, response);

}

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

request.setCharacterEncoding("UTF-8");

//文件的上传部分

boolean isMultipart = ServletFileUpload.isMultipartContent(request);

if(isMultipart)

{

try {

FileItemFactory factory = new DiskFileItemFactory();

ServletFileUpload fileload = new ServletFileUpload(factory);

// 设置最大文件尺寸，这里是4MB

fileload.setSizeMax(4194304);

List<FileItem> files = fileload.parseRequest(request);

Iterator<FileItem> iterator = files.iterator();

while(iterator.hasNext())

{

FileItem item = iterator.next();

if(item.isFormField())

{

String name = item.getFieldName();

String value = item.getString();

System.out.println("表单域名为: " + name + "值为: " + value);

}else

{

//获得获得文件名，此文件名包括路径

String filename = item.getName();

if(filename != null)

{

File file = new File(filename);

//如果此文件存在

if(file.exists()){

File filetoserver = new File("d:\\upload\\",file.getName());

item.write(filetoserver);

System.out.println("文件 " + filetoserver.getName() + " 上传成功!!");

}

} catch (Exception e) {

System.out.println(e.getStackTrace());

}

　　3.web.xml清单如下:

Java代码

<?xml version="1.0" encoding="UTF-8"?>

<web-app version="2.4"

    xmlns="http://java.sun.com/xml/ns/j2ee"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee

    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">  

    <servlet>

        <servlet-name>UploadFileServlet</servlet-name>

        <servlet-class>

            org.chris.fileupload.FileUplaodServlet

        </servlet-class>

    </servlet>  

    <servlet-mapping>

        <servlet-name>UploadFileServlet</servlet-name>

        <url-pattern>/UploadFile</url-pattern>

    </servlet-mapping>  

    <welcome-file-list>

        <welcome-file>/Index.jsp</welcome-file>

    </welcome-file-list>  

</web-app>

二.在strut1.2中实现
1.上传页面file.jsp 清单如下:

Java代码

<%@ page language="java" pageEncoding="ISO-8859-1"%>

<%@ 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>JSP for FileForm form</title>

    </head>

    <body>

        <html:form action="/file" enctype="multipart/form-data">

        <html:file property="file1"></html:file>

            <html:submit/><html:cancel/>

        </html:form>

    </body>

</html>

2.FileAtion.java的清单如下:

Java代码

/*

 * Generated by MyEclipse Struts

 * Template path: templates/java/JavaClass.vtl

 */

package action;  

import java.io.*;  

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 org.apache.struts.upload.FormFile;  

import form.FileForm;  

/**

 * @author Chris

 * Creation date: 6-27-2008

 *

 * XDoclet definition:

 * @struts.action path="/file" name="fileForm" input="/file.jsp"

 */

public class FileAction 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) {

        FileForm fileForm = (FileForm) form;

        FormFile file1=fileForm.getFile1();

        if(file1!=null){

            //上传路径

            String dir=request.getSession(true).getServletContext().getRealPath("/upload");

            OutputStream fos=null;

            try {

                fos=new FileOutputStream(dir+"/"+file1.getFileName());

                fos.write(file1.getFileData(),0,file1.getFileSize());

                fos.flush();

            } catch (Exception e) {

                // TODO Auto-generated catch block

                e.printStackTrace();

            }finally{

                try{

                fos.close();

                }catch(Exception e){}

            }

        }

        //页面跳转

        return mapping.findForward("success");

    }

}

3.FileForm.java的清单如下:

package form;  

import javax.servlet.http.HttpServletRequest;

import org.apache.struts.action.ActionErrors;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionMapping;

import org.apache.struts.upload.FormFile;  

/**

 * @author Chris

 * Creation date: 6-27-2008

 *

 * XDoclet definition:

 * @struts.form name="fileForm"

 */

public class FileForm extends ActionForm {

    /*

     * Generated Methods

     */

    private FormFile file1;

    /**

     * Method validate

     * @param mapping

     * @param request

     * @return ActionErrors

     */

    public ActionErrors validate(ActionMapping mapping,

            HttpServletRequest request) {

        // TODO Auto-generated method stub

        return null;

    }  

    /**

     * Method reset

     * @param mapping

     * @param request

     */

    public void reset(ActionMapping mapping, HttpServletRequest request) {

        // TODO Auto-generated method stub

    }  

    public FormFile getFile1() {

        return file1;

    }  

    public void setFile1(FormFile file1) {

        this.file1 = file1;

    }

}

4.struts-config.xml的清单如下:

Java代码

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd">  

<struts-config>

  <data-sources />

  <form-beans >

    <form-bean name="fileForm" type="form.FileForm" />  

  </form-beans>  

  <global-exceptions />

  <global-forwards />

  <action-mappings >

    <action

      attribute="fileForm"

      input="/file.jsp"

      name="fileForm"

      path="/file"

      type="action.FileAction"

      validate="false">

       <forward name="success" path="/file.jsp"></forward>

      </action>  

  </action-mappings>  

  <message-resources parameter="ApplicationResources" />

</struts-config>

5.web.xml代码清单如下:

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.4" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee   http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

  <servlet>

    <servlet-name>action</servlet-name>

    <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>

    <init-param>

      <param-name>config</param-name>

      <param-value>/WEB-INF/struts-config.xml</param-value>

    </init-param>

    <init-param>

      <param-name>debug</param-name>

      <param-value>3</param-value>

    </init-param>

    <init-param>

      <param-name>detail</param-name>

      <param-value>3</param-value>

    </init-param>

    <load-on-startup>0</load-on-startup>

  </servlet>

  <servlet-mapping>

    <servlet-name>action</servlet-name>

    <url-pattern>*.do</url-pattern>

  </servlet-mapping>

</web-app>

三.在struts2中实现(以图片上传为例)

1.FileUpload.jsp代码清单如下:

Java代码

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<%@ taglib prefix="s" uri="/struts-tags" %>

<html>

  <head>

    <title>The FileUplaodDemo In Struts2</title>

  </head>  

  <body>

    <s:form action="fileUpload.action" method="POST" enctype="multipart/form-data">

        <s:file name="myFile" label="MyFile" ></s:file>

        <s:textfield name="caption" label="Caption"></s:textfield>

        <s:submit label="提交"></s:submit>

    </s:form>

  </body>

</html>

2.ShowUpload.jsp的功能清单如下:

Java代码

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<%@ taglib prefix="s" uri="/struts-tags" %>

<html>

  <head>

    <title>ShowUpload</title>

  </head>  

  <body>

    <div style ="padding: 3px; border: solid 1px #cccccc; text-align: center" >

        <img src ='UploadImages/<s:property value ="imageFileName"/> '/>

        <br />

        <s:property value ="caption"/>

    </div >

  </body>

</html>

3.FileUploadAction.java的代码清单如下 :

Java代码

package com.chris;  

import java.io.*;

import java.util.Date;  

import org.apache.struts2.ServletActionContext;  

import com.opensymphony.xwork2.ActionSupport;  

public class FileUploadAction extends ActionSupport{  

     private static final long serialVersionUID = 572146812454l ;

     private static final int BUFFER_SIZE = 16 * 1024 ;  

     //注意，文件上传时<s:file/>同时与myFile，myFileContentType,myFileFileName绑定

     //所以同时要提供myFileContentType,myFileFileName的set方法  

     private File myFile;   //上传文件

     private String contentType;//上传文件类型

     private String fileName;   //上传文件名

     private String imageFileName;

     private String caption;//文件说明，与页面属性绑定  

     public void setMyFileContentType(String contentType)  {

         System.out.println("contentType : " + contentType);

         this .contentType = contentType;

    }   

     public void setMyFileFileName(String fileName)  {

         System.out.println("FileName : " + fileName);

         this .fileName = fileName;

    }   

     public void setMyFile(File myFile)  {

         this .myFile = myFile;

    }   

     public String getImageFileName()  {

         return imageFileName;

    }   

     public String getCaption()  {

         return caption;

    }   

      public void setCaption(String caption)  {

         this .caption = caption;

    }   

     private static void copy(File src, File dst)  {

         try  {

            InputStream in = null ;

            OutputStream out = null ;

             try  {

                in = new BufferedInputStream( new FileInputStream(src), BUFFER_SIZE);

                out = new BufferedOutputStream( new FileOutputStream(dst), BUFFER_SIZE);

                 byte [] buffer = new byte [BUFFER_SIZE];

                 while (in.read(buffer) > 0 )  {

                    out.write(buffer);

                }

             } finally  {

                 if ( null != in)  {

                    in.close();

                }

                  if ( null != out)  {

                    out.close();

                }

            }

         } catch (Exception e)  {

            e.printStackTrace();

        }

    }   

     private static String getExtention(String fileName)  {

         int pos = fileName.lastIndexOf(".");

         return fileName.substring(pos);

    }   

    @Override

     public String execute()      {

        imageFileName = new Date().getTime() + getExtention(fileName);

        File imageFile = new File(ServletActionContext.getServletContext().getRealPath("/UploadImages" ) + "/" + imageFileName);

        copy(myFile, imageFile);

         return SUCCESS;

    }

}

注:此时仅为方便实现Action所以继承ActionSupport,并Overrider execute()方法
在struts2中任何一个POJO都可以作为Action

4.struts.xml清单如下:

Java代码

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts PUBLIC

    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"

    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>

    <package name="example" namespace="/" extends="struts-default">

        <action name="fileUpload" class="com.chris.FileUploadAction">

        <interceptor-ref name="fileUploadStack"/>

        <result>/ShowUpload.jsp</result>

        </action>

    </package>

</struts>

5.web.xml清单如下:

Java代码

<?xml version="1.0" encoding="UTF-8"?>

<web-app version="2.4"

    xmlns="http://java.sun.com/xml/ns/j2ee"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee

    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

    <filter >

        <filter-name > struts-cleanup </filter-name >

        <filter-class >

            org.apache.struts2.dispatcher.ActionContextCleanUp

        </filter-class >

    </filter >

     <filter-mapping >

        <filter-name > struts-cleanup </filter-name >

        <url-pattern > /* </url-pattern >

    </filter-mapping >  

    <filter>

        <filter-name>struts2</filter-name>

        <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>

    </filter>

    <filter-mapping>

        <filter-name>struts2</filter-name>

        <url-pattern>/*</url-pattern>

    </filter-mapping>

  <welcome-file-list>

    <welcome-file>Index.jsp</welcome-file>

  </welcome-file-list>  

</web-app>

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