struts文件上传下载

最新推荐文章于 2025-04-10 17:42:09 发布

stefanie860624

最新推荐文章于 2025-04-10 17:42:09 发布

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分类专栏： skill 文章标签： struts string file button exception input

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Struts2 多文件上传和下载

Download.java:

package com.cjg.action;

import java.io.InputStream;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class Download extends ActionSupport{

public InputStream getDownloadFile(){

return ServletActionContext.getServletContext ().getResourceAsStream( "/upload/.....txt" );

}

@Override

public String execute() throws Exception

{

return SUCCESS ;

}

UploadAction.java

package com.cjg.action;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.io.OutputStream;

import java.util.List;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class UploadAction extends ActionSupport{

private String username ;

private String password ;

private List<File> file ;

private List<String> fileFileName ;

private List<String> fileContentType ;

public String getUsername() {

return username ;

}

public void setUsername(String username) {

this . username = username;

}

public String getPassword() {

return password ;

}

public void setPassword(String password) {

this . password = password;

}

public List<File> getFile() {

return file ;

}

public void setFile(List<File> file) {

this . file = file;

}

public List<String> getFileFileName() {

return fileFileName ;

}

public void setFileFileName(List<String> fileFileName) {

this . fileFileName = fileFileName;

}

public List<String> getFileContentType() {

return fileContentType ;

}

public void setFileContentType(List<String> fileContentType) {

this . fileContentType = fileContentType;

}

public String execute() throws Exception{

for ( int i = 0; i < file .size();++i){

if ( file == null ){

super .addFieldError( "file:" , "file not is null!" );

return ERROR ;

}

InputStream is = new FileInputStream ( file .get(i));

String root = ServletActionContext.getRequest ().getRealPath( "/upload" );

System. out .println(root+ "-----------" );

File destFile = new File(root, this .getFileFileName().get(i));

OutputStream os = new FileOutputStream (destFile);

byte [] buffer = new byte [400];

int length = 0;

while ((length = is.read (buffer)) > 0){

os.write (buffer, 0, length);

}

os.close ();

is.close ();

}

return SUCCESS ;

}

Message.properties:

struts.messages.error.content.type.not.allowed= /u4e0a/u4f20/u6587/u4ef6/u7c7b/u578b/u4e0d/u5141/u8bb8/uff0c/u8bf7/u91cd/u8bd5/uff01

struts.messages.error.file.too.large= /u4e0a/u4f20/u6587/u4ef6/u8fc7/u5927/uff0c/u8bf7/u91cd/u8bd5/uff01

struts.properties:

struts.i18n.encoding = gbk

struts.xml

<? 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 >

< constant name = "struts.custom.i18n.resources" value = "message" ></ constant >

< constant name = "struts.multipart.saveDir" value = "e:/" ></ constant >

< package name = "struts2" extends = "jfreechart-default" >

< action name = "upload" class = "com.cjg.action.UploadAction" >

< result name = "success" > /upload/uploadResult.jsp </ result >

< result name = "input" > /upload/upload.jsp </ result >

< result name = "error" > /upload/upload.jsp </ result >

< interceptor-ref name = "fileUpload" >

< param name = "maximumSize" > 409600 </ param >

< param name = "allowedTypes" >

image/bmp,image/jpg,image/x-png,image/gif,image/jpeg,text/plain,application/msword,application/excel,application/vnd.ms-excel,application/vnd.ms-powerpoint,application/zip,application/x-zip-compressed,application/rar,application/octet-stream,application/xml,text/xml

</ param >

</ interceptor-ref >

< interceptor-ref name = "defaultStack" ></ interceptor-ref >

</ action >

< action name = "download"

class = "com.cjg.action.Download" >

< result name = "success" type = "stream" >

< param name = "contentType" >

</ param >

< param name = "contentDisposition" >

filename="…...txt"

</ param >

< param name = "inputName" > downloadFile </ param >

</ result >

</ action >

Upload.jsp:

<%@ page language = "java" import = "java.util.*" pageEncoding = "GBK" %>

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

String path = request.getContextPath();

String basePath = request.getScheme()+ "://" +request.getServerName()+ ":" +request.getServerPort()+path+ "/" ;

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

< html >

< head >

< base href = "<%= basePath %> ">

< title > My JSP 'uploadsingle.jsp' starting page </ 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" >

<!--

-->

< script type = "text/javascript" >

function addMore() {

var td = document.getElementById( "more" );

var br = document.createElement( "br" );

var input = document.createElement( "input" );

var button = document.createElement( "input" );

input.type = "file" ;

input.name = "file" ;

button.type = "button" ;

button.value = "Remove" ;

button.οnclick= function () {

td.removeChild(br);

td.removeChild(input);

td.removeChild(button);

}

td.appendChild(br);

td.appendChild(input);

td.appendChild(button);

}

</ script >

</ head >

< body >

< table align = "center" width = "50%" >

< tr >

< td >

< s:fielderror cssStyle = "color:red" />

</ td >

</ tr >

</ table >

< s:form action = "upload" theme = "simple" enctype = "multipart/form-data" method = "post" >

< table align = "center" width = "50%" border = "1" >

< tr >

< td >

username

</ td >

< td >

< s:textfield name = "username" ></ s:textfield >

</ td >

</ tr >

< tr >

< td >

password

</ td >

< td >

< s:password name = "password" ></ s:password >

</ td >

</ tr >

< tr >

< td >

file

</ td >

< td id = "more" >

< s:file name = "file" ></ s:file >< input type = "button" value = "Add More.." onclick = "addMore()" >

</ td >

</ tr >

< tr >

< td >

< s:submit value = " submit " ></ s:submit >

</ td >

< td >

< s:reset value = " reset " ></ s:reset >

</ td >

</ tr >

</ table >

</ s:form >

</ body >

</ html >

Web.xml:

<? 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 > 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 >

< servlet >

< servlet-name > UploadServlet </ servlet-name >

< servlet-class > com.test.servlet.UploadServlet </ servlet-class >

</ servlet >

< servlet-mapping >

< servlet-name > UploadServlet </ servlet-name >

< url-pattern > /UploadServlet </ url-pattern >

</ servlet-mapping >

< welcome-file-list >

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

</ welcome-file-list >

</ web-app >

注意： 1 ，单文件上传只要将其中的属性中的 list 去掉。

2 ， allowedType 可以参见 tomcat 中的 web.xml 中的设置。