struts实现多个文件上传功能

孤独剑

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Struts Apache JSP HTML Linux

最近在做Struts项目时遇到了上传多个文件的问题。在网上查了不少资料，也没有找到用Struts上传多个文件的例子。我经过几天的研究，实现了用Struts上传多个文件的功能。现在贴出来让大家共享！
一。建立ActionForm
package com.cnehu.struts.form;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.upload.FormFile;
import org.apache.struts.upload.MultipartRequestHandler;

public class UpLoadForm extends ActionForm
{
public static final String ERROR_PROPERTY_MAX_LENGTH_EXCEEDED = "org.apache.struts.webapp.upload.MaxLengthExceeded";
protected FormFile theFile;
protected FormFile theFile2;
public FormFile getTheFile()
{
return theFile;
}
public void setTheFile(FormFile theFile)
{
this.theFile = theFile;
}
public ActionErrors validate(ActionMapping mapping,
HttpServletRequest request)
{
ActionErrors errors = null;
//has the maximum length been exceeded?
Boolean maxLengthExceeded = (Boolean) request
.getAttribute(MultipartRequestHandler.ATTRIBUTE_MAX_LENGTH_EXCEEDED);
if ((maxLengthExceeded != null) && (maxLengthExceeded.booleanValue()))
{
errors = new ActionErrors();
errors.add(ERROR_PROPERTY_MAX_LENGTH_EXCEEDED, new ActionError(
"maxLengthExceeded"));
}
return errors;
}
/**
* @return Returns the theFile2.
*/
public FormFile getTheFile2()
{
return theFile2;
}
/**
* @param theFile2 The theFile2 to set.
*/
public void setTheFile2(FormFile theFile2)
{
this.theFile2 = theFile2;
}
}
二。建立ActionServlet
package com.cnehu.struts.action;
import java.io.*;
import javax.servlet.http.*;
import org.apache.struts.action.*;
import org.apache.struts.upload.FormFile;
import com.cnehu.struts.form.UpLoadForm;

public class UpLoadAction extends Action
{
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception
{
String encoding = request.getCharacterEncoding();
if ((encoding != null) && (encoding.equalsIgnoreCase("utf-8")))
{
response.setContentType("text/html; charset=gb2312");//如果没有指定编码，编码格式为gb2312
}
UpLoadForm theForm = (UpLoadForm) form;
FormFile file = theForm.getTheFile();//取得上传的文件
FormFile file2=theForm.getTheFile2();
try
{ 
/*
* 取当前系统路径D:\Tomcat5\webapps\coka\ 其中coka 为当前context
*/
String filePath = this.getServlet().getServletContext()
.getRealPath("/");
InputStream stream = file.getInputStream();//把文件读入
ByteArrayOutputStream baos = new ByteArrayOutputStream();
/*
* 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"/"
*/
OutputStream bos = new FileOutputStream(filePath +
"UploadFiles\\"+file.getFileName());
//D:\Tomcat5\webapps\coka\UploadFiles\DSC01508.JPG
/*System.out.println(filePath +
"UploadFiles\\"+file.getFileName());
System.out.println(filePath);*/
request.setAttribute("fileName",filePath + "/"
+ file.getFileName());
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();
InputStream stream2 = file2.getInputStream();//把文件读入
ByteArrayOutputStream baos2 = new ByteArrayOutputStream();
OutputStream bos2 =new FileOutputStream(filePath +
"UploadFiles\\"+file2.getFileName());//建立一个上传文件的输出流
int bytesRead2 = 0;
byte[] buffer2 = new byte[8192];
int i=0;
while ((bytesRead2 = stream2.read(buffer2, 0, 8192)) != -1)
{
bos2.write(buffer2, 0, bytesRead2);//将文件写入服务器
} 
bos2.close();
stream2.close();
} catch (Exception e)
{
System.err.print(e);
}
return mapping.findForward("display");
}
}
三。建立上传用的JSP文件 upload.jsp
<%@ taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html" %>
<html:html>
<head>
<title>用Struts上传文件</title>
</head>
<body>
<html:form action="/uploadsAction" enctype="multipart/form-data">
<html:file property="theFile"/>
<html:file property="theFile2"/>
<html:submit/>
</html:form>
</body>
</html:html>
四。配置struts-config.xml文件
<?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="uploadsForm" type="com.cnehu.struts.form.UpLoadForm" /> 
</form-beans>
<global-exceptions />
<global-forwards >
</global-forwards>
<action-mappings >
<action name="uploadsForm" type="com.cnehu.struts.action.UpLoadAction" path="/uploadsAction">
<forward name="display" path="/display.jsp" />
</action>
</action-mappings>
</struts-config>

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