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struts实现多文件上传

2007-07-26 23:17 537 查看

利用struts实现多文件上传

fileUpload.jsp代码如下：

<%@ page language="java" pageEncoding="gb2312" contentType="text/html;charset=gb2312"%>

<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean"%>

<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html"%>

<html>

<head>

<title>JSP for FileUploadForm form</title>

var i=0;

function addInput()...{

if(i>=0)...{

var attach = "testFile(" + i + ")";

if(createInput(attach))

i=i+1;

}

function deleteInput()...{

if(i>=1)...{

i=i-1;

if(!removeInput())

i=i+1;

}

function createInput(nm)...{

var p=document.createElement("div");

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

aElement.name=nm;

aElement.id=nm;

aElement.type="file";

aElement.size="50";

//aElement.value="thanks";

//aElement.onclick=Function("asdf()");

p.appendChild(aElement);

if(document.getElementById("upload").appendChild(p) == null)

...{

return false;

}

return true;

}

function removeInput(nm)...{

var aElement = document.getElementById("upload");

if(aElement.removeChild(aElement.lastChild) == null)

return false;

return true;

}

　　　　function check()...{

var aElement = document.getElementById("upload");

var index = aElement.children.length;

var fso=new ActiveXObject("Scripting.FileSystemObject");

var filesize=0;

while(index>0)...{

var s = aElement.children[index-1].children[0].value;

if(s=='')...{

alert('请为'+i+'个输入选择文件');

return false ;

}else...{

var f=fso.GetFile(s);

filesize=filesize+f.size

}

index = index-1;

}

if(filesize>15728640)...{

alert('所传文件总大小不能超过15M');

return false;

}

return true ;

}

　　　　</script>

</head>

<body>

<html:form action="/fileUpload" method="post"

enctype="multipart/form-data" onsubmit="return check()">

<%--

enctype属性可设置或返回表单内容的MIME类型,如果表单没有enctype属性，默认的值为："application/x-www-form-urlencoded",

当内容为“文件”，值应该为"multipart/form-data".

application/x-www-form-urlencoded：窗体数据被编码为名称/值对。这是标准的编码格式。

multipart/form-data：窗体数据被编码为一条消息，页上的每个控件对应消息中的一个部分。

text/plain：窗体数据以纯文本形式进行编码，其中不含任何控件或格式字符。

--%>

<br><font color=red>上传文件总大小不能超过15M</font><br>

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

</html:form>

</center>

</body>

</html>

FileUploadForm.java代码如下：

/**//*

* Generated by MyEclipse Struts

* Template path: templates/java/JavaClass.vtl

package com.iss.struts.form;

import java.util.ArrayList;

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;

/** *//**

* MyEclipse Struts

* Creation date: 07-26-2007

* XDoclet definition:

* @struts.form name="fileUploadForm"

public class FileUploadForm extends ActionForm ...{

private ArrayList formFiles = new ArrayList();

public void setTestFile(String iIndex, FormFile formFile)

...{

this.formFiles.add(formFile);

}

public FormFile getTestFile(String iIndex)

...{

return (FormFile) formFiles.get(Integer.parseInt(iIndex));

}

public ArrayList getTestFiles()

...{

return this.formFiles;

}

/** *//**

* 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

}

}

FileUploadAction.java代码如下：

/**//*

* Generated by MyEclipse Struts

* Template path: templates/java/JavaClass.vtl

package com.iss.struts.action;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.util.ArrayList;

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 com.iss.struts.form.FileUploadForm;

/** *//**

* MyEclipse Struts

* Creation date: 07-26-2007

* XDoclet definition:

* @struts.action path="/fileUpload" name="fileUploadForm" input="/form/fileUpload.jsp" scope="request" validate="true"

public class FileUploadAction extends Action ...{

/**//*

* Generated Methods

/** *//**

* Method execute

* @param mapping

* @param form

* @param request

* @param response

* @return ActionForward

* @throws IOException

* @throws FileNotFoundException

public ActionForward execute(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response) throws FileNotFoundException, IOException ...{

FileUploadForm fileUploadForm = (FileUploadForm) form;

ArrayList myFiles=fileUploadForm.getTestFiles();

if(myFiles.size()>0)...{

String sysroot = servlet.getServletContext()

.getInitParameter("sysroot");

for(int j=0;j<myFiles.size();j++)...{

FormFile uploadFile = (FormFile)myFiles.get(j);

String fname=uploadFile.getFileName();

InputStream streamIn=uploadFile.getInputStream();

OutputStream streamOut=new FileOutputStream(sysroot+"/"+fname);

int bytesRead=0;

byte[] buffer=new byte[8192];

while((bytesRead=streamIn.read(buffer, 0, 8192))!=-1)...{

streamOut.write(buffer, 0, bytesRead);

}

streamOut.close();

streamIn.close();

}

return mapping.findForward("success");

}

}

success.jsp代码如下：

<%@ page language="java" pageEncoding="GB18030"%>

<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>

<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>

<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>

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

<html>

<head>

<title>success.jsp</title>

<!--

-->

</head>

<body>

上传文件成功！ <br>

</body>

</html>

struts-config.xml配置如下：

<?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="fileUploadForm" type="com.iss.struts.form.FileUploadForm" />

</form-beans>

<global-exceptions />

<global-forwards />

<action-mappings >

<action

attribute="fileUploadForm"

input="/form/fileUpload.jsp"

name="fileUploadForm"

path="/fileUpload"

scope="request"

type="com.iss.struts.action.FileUploadAction">

</action>

</action-mappings>

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

</struts-config>

web.xml配置如下：

<?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">

<context-param>

<param-name>sysroot</param-name>

<param-value>E:/FileManage</param-value>

</context-param>

<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>

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标签： struts import html upload action button

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