刚刚做了三个文件上传的Demo
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:
- <%@pagelanguage="java"import="java.util.*"pageEncoding="UTF-8"%>
- <!DOCTYPEHTMLPUBLIC"-//W3C//DTDHTML4.01Transitional//EN">
- <html>
- <head>
- <title>TheFileUploadDemo</title>
- </head>
- <body>
- <formaction="UploadFile"method="post"enctype="multipart/form-data">
- <p><inputtype="text"name="fileinfo"value="">文件介绍</p>
- <p><inputtype="file"name="myfile"value="浏览文件"></p>
- <p><inputtype="submit"value="上传"></p>
- </form>
- </body>
- </html>
<%@ 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:
- packageorg.chris.fileupload;
- importjava.io.File;
- importjava.io.IOException;
- importjava.util.Iterator;
- importjava.util.List;
- importjavax.servlet.ServletException;
- importjavax.servlet.http.*;
- importorg.apache.commons.fileupload.FileItem;
- importorg.apache.commons.fileupload.FileItemFactory;
- importorg.apache.commons.fileupload.disk.DiskFileItemFactory;
- importorg.apache.commons.fileupload.servlet.ServletFileUpload;
- publicclassFileUplaodServletextendsHttpServlet{
- protectedvoiddoGet(HttpServletRequestrequest,HttpServletResponseresponse)throwsServletException,IOException{
- doPost(request,response);
- }
- protectedvoiddoPost(HttpServletRequestrequest,HttpServletResponseresponse)throwsServletException,IOException{
- request.setCharacterEncoding("UTF-8");
- //文件的上传部分
- booleanisMultipart=ServletFileUpload.isMultipartContent(request);
- if(isMultipart)
- {
- try{
- FileItemFactoryfactory=newDiskFileItemFactory();
- ServletFileUploadfileload=newServletFileUpload(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())
- {
- FileItemitem=iterator.next();
- if(item.isFormField())
- {
- Stringname=item.getFieldName();
- Stringvalue=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
- Stringfilename=item.getName();
- if(filename!=null)
- {
- Filefile=newFile(filename);
- //如果此文件存在
- if(file.exists()){
- Filefiletoserver=newFile("d://upload//",file.getName());
- item.write(filetoserver);
- System.out.println("文件"+filetoserver.getName()+"上传成功!!");
- }
- }
- }
- }
- }catch(Exceptione){
- System.out.println(e.getStackTrace());
- }
- }
- }
- }
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:
- <?xmlversion="1.0"encoding="UTF-8"?>
- <web-appversion="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>
<?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:
- <%@pagelanguage="java"pageEncoding="ISO-8859-1"%>
- <%@tagliburi="http://jakarta.apache.org/struts/tags-bean"prefix="bean"%>
- <%@tagliburi="http://jakarta.apache.org/struts/tags-html"prefix="html"%>
- <html>
- <head>
- <title>JSPforFileFormform</title>
- </head>
- <body>
- <html:formaction="/file"enctype="multipart/form-data">
- <html:fileproperty="file1"></html:file>
- <html:submit/><html:cancel/>
- </html:form>
- </body>
- </html>
<%@ 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:
- /*
- *GeneratedbyMyEclipseStruts
- *Templatepath:templates/java/JavaClass.vtl
- */
- packageaction;
- importjava.io.*;
- importjavax.servlet.http.HttpServletRequest;
- importjavax.servlet.http.HttpServletResponse;
- importorg.apache.struts.action.Action;
- importorg.apache.struts.action.ActionForm;
- importorg.apache.struts.action.ActionForward;
- importorg.apache.struts.action.ActionMapping;
- importorg.apache.struts.upload.FormFile;
- importform.FileForm;
- /**
- *@authorChris
- *Creationdate:6-27-2008
- *
- *XDocletdefinition:
- *@struts.actionpath="/file"name="fileForm"input="/file.jsp"
- */
- publicclassFileActionextendsAction{
- /*
- *GeneratedMethods
- */
- /**
- *Methodexecute
- *@parammapping
- *@paramform
- *@paramrequest
- *@paramresponse
- *@returnActionForward
- */
- publicActionForwardexecute(ActionMappingmapping,ActionFormform,
- HttpServletRequestrequest,HttpServletResponseresponse){
- FileFormfileForm=(FileForm)form;
- FormFilefile1=fileForm.getFile1();
- if(file1!=null){
- //上传路径
- Stringdir=request.getSession(true).getServletContext().getRealPath("/upload");
- OutputStreamfos=null;
- try{
- fos=newFileOutputStream(dir+"/"+file1.getFileName());
- fos.write(file1.getFileData(),0,file1.getFileSize());
- fos.flush();
- }catch(Exceptione){
- //TODOAuto-generatedcatchblock
- e.printStackTrace();
- }finally{
- try{
- fos.close();
- }catch(Exceptione){}
- }
- }
- //页面跳转
- returnmapping.findForward("success");
- }
- }
/*
* 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:
- packageform;
- importjavax.servlet.http.HttpServletRequest;
- importorg.apache.struts.action.ActionErrors;
- importorg.apache.struts.action.ActionForm;
- importorg.apache.struts.action.ActionMapping;
- importorg.apache.struts.upload.FormFile;
- /**
- *@authorChris
- *Creationdate:6-27-2008
- *
- *XDocletdefinition:
- *@struts.formname="fileForm"
- */
- publicclassFileFormextendsActionForm{
- /*
- *GeneratedMethods
- */
- privateFormFilefile1;
- /**
- *Methodvalidate
- *@parammapping
- *@paramrequest
- *@returnActionErrors
- */
- publicActionErrorsvalidate(ActionMappingmapping,
- HttpServletRequestrequest){
- //TODOAuto-generatedmethodstub
- returnnull;
- }
- /**
- *Methodreset
- *@parammapping
- *@paramrequest
- */
- publicvoidreset(ActionMappingmapping,HttpServletRequestrequest){
- //TODOAuto-generatedmethodstub
- }
- publicFormFilegetFile1(){
- returnfile1;
- }
- publicvoidsetFile1(FormFilefile1){
- this.file1=file1;
- }
- }
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:
- <?xmlversion="1.0"encoding="UTF-8"?>
- <!DOCTYPEstruts-configPUBLIC"-//ApacheSoftwareFoundation//DTDStrutsConfiguration1.2//EN""http://struts.apache.org/dtds/struts-config_1_2.dtd">
- <struts-config>
- <data-sources/>
- <form-beans>
- <form-beanname="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">
- <forwardname="success"path="/file.jsp"></forward>
- </action>
- </action-mappings>
- <message-resourcesparameter="ApplicationResources"/>
- </struts-config>
<?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:
- <?xmlversion="1.0"encoding="UTF-8"?>
- <web-appxmlns="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/j2eehttp://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>
<?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:
- <%@pagelanguage="java"import="java.util.*"pageEncoding="utf-8"%>
- <%@taglibprefix="s"uri="/struts-tags"%>
- <html>
- <head>
- <title>TheFileUplaodDemoInStruts2</title>
- </head>
- <body>
- <s:formaction="fileUpload.action"method="POST"enctype="multipart/form-data">
- <s:filename="myFile"label="MyFile"></s:file>
- <s:textfieldname="caption"label="Caption"></s:textfield>
- <s:submitlabel="提交"></s:submit>
- </s:form>
- </body>
- </html>
<%@ 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:
- <%@pagelanguage="java"import="java.util.*"pageEncoding="utf-8"%>
- <%@taglibprefix="s"uri="/struts-tags"%>
- <html>
- <head>
- <title>ShowUpload</title>
- </head>
- <body>
- <divstyle="padding:3px;border:solid1px#cccccc;text-align:center">
- <imgsrc='UploadImages/<s:propertyvalue="imageFileName"/>'/>
- <br/>
- <s:propertyvalue="caption"/>
- </div>
- </body>
- </html>
<%@ 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 :
- packagecom.chris;
- importjava.io.*;
- importjava.util.Date;
- importorg.apache.struts2.ServletActionContext;
- importcom.opensymphony.xwork2.ActionSupport;
- publicclassFileUploadActionextendsActionSupport{
- privatestaticfinallongserialVersionUID=572146812454l;
- privatestaticfinalintBUFFER_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
- privateFilemyFile;//上传文件
- privateStringcontentType;//上传文件类型
- privateStringfileName;//上传文件名
- privateStringimageFileName;
- privateStringcaption;//文件说明,与页面属性绑定
- publicvoidsetMyFileContentType(StringcontentType){
- System.out.println("contentType:"+contentType);
- this.contentType=contentType;
- }
- publicvoidsetMyFileFileName(StringfileName){
- System.out.println("FileName:"+fileName);
- this.fileName=fileName;
- }
- publicvoidsetMyFile(FilemyFile){
- this.myFile=myFile;
- }
- publicStringgetImageFileName(){
- returnimageFileName;
- }
- publicStringgetCaption(){
- returncaption;
- }
- publicvoidsetCaption(Stringcaption){
- this.caption=caption;
- }
- privatestaticvoidcopy(Filesrc,Filedst){
- try{
- InputStreamin=null;
- OutputStreamout=null;
- try{
- in=newBufferedInputStream(newFileInputStream(src),BUFFER_SIZE);
- out=newBufferedOutputStream(newFileOutputStream(dst),BUFFER_SIZE);
- byte[]buffer=newbyte[BUFFER_SIZE];
- while(in.read(buffer)>0){
- out.write(buffer);
- }
- }finally{
- if(null!=in){
- in.close();
- }
- if(null!=out){
- out.close();
- }
- }
- }catch(Exceptione){
- e.printStackTrace();
- }
- }
- privatestaticStringgetExtention(StringfileName){
- intpos=fileName.lastIndexOf(".");
- returnfileName.substring(pos);
- }
- @Override
- publicStringexecute(){
- imageFileName=newDate().getTime()+getExtention(fileName);
- FileimageFile=newFile(ServletActionContext.getServletContext().getRealPath("/UploadImages")+"/"+imageFileName);
- copy(myFile,imageFile);
- returnSUCCESS;
- }
- }
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:
- <?xmlversion="1.0"encoding="UTF-8"?>
- <!DOCTYPEstrutsPUBLIC
- "-//ApacheSoftwareFoundation//DTDStrutsConfiguration2.0//EN"
- "http://struts.apache.org/dtds/struts-2.0.dtd">
- <struts>
- <packagename="example"namespace="/"extends="struts-default">
- <actionname="fileUpload"class="com.chris.FileUploadAction">
- <interceptor-refname="fileUploadStack"/>
- <result>/ShowUpload.jsp</result>
- </action>
- </package>
- </struts>
<?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:
- <?xmlversion="1.0"encoding="UTF-8"?>
- <web-appversion="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>
本文详细介绍了如何在JSP、Struts1.2和Struts2环境中使用Commons-fileupload组件实现文件上传功能。通过三个简单的Demo,展示了在不同框架下实现文件上传的基本步骤和关键代码。从上传表单的设计到Servlet的处理逻辑,再到Struts2的整合,提供了完整的实现流程和代码示例。
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