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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;
/**
* <p>
* title:uploadform
* </p>
* <p>
* copyright: copyright (c) 2005 techyang http://blog.csdn.net/techyang
* </p>
* @author techyang
* @version 1.0
*/
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;
/**
* <p>
* title:uploadaction
* </p>
* <p>
* copyright: copyright (c) 2005 techyang http://blog.csdn.net/techyang
* </p>
* @author techyang
* @version 1.0
*/
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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