单文件上传

[code]上传的表单method应设为post,enctype应设为multipart/form-data


--------------------------示例---------------------------------------
upload.jsp
=====================
<form action="upload.do?method=upload" method="post"
enctype="multipart/form-data">
select the file you wish to upload:
<input type="file" name="file" />
<br />
<input type="text" name="name"/>
<input type="submit" value="submit" />
<input type="reset" value="cancel" />
</form>
<%
if (request.getAttribute("result") != null) {
out.println(request.getAttribute("result").toString());
}
%>


UploadForm.java
=====================
/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package com.supersit.struts.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;

/**
* MyEclipse Struts
* Creation date: 10-23-2007
*
* XDoclet definition:
* @struts.form name="uploadForm"
*/
public class UploadForm extends ActionForm {
/*
* Generated Methods
*/

/**
* 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
}

private FormFile file;

private String name;


public FormFile getFile() {
return file;
}

public void setFile(FormFile file) {
this.file = file;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

}


UploadAction.java
==========================
/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package com.supersit.struts.action;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;

import com.supersit.struts.form.UploadForm;
import com.supersit.struts.util.DateTime;
import com.supersit.struts.util.MD5;

/**
* MyEclipse Struts Creation date: 10-23-2007
*
* XDoclet definition:
*
* @struts.action input="/upload.jsp"
*/
public class UploadAction extends DispatchAction {
/*
* Generated Methods
*/

/**
* Method execute
*
* @param mapping
* @param form
* @param request
* @param response
* @return ActionForward
*/
public ActionForward upload(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {

UploadForm uploadform = (UploadForm) form;

String context = this.servlet.getServletContext().getRealPath("/");

System.out.println("context="+context);

org.apache.struts.upload.FormFile formfile = uploadform.getFile();
java.io.InputStream is = null;
java.io.OutputStream os = null;
try {
is = formfile.getInputStream();

String ext=formfile.getFileName().split("\\.")[1];
String filename = new MD5().getMD5ofStr(formfile.getFileName()
+ new DateTime().getCurrentDate5())
+ "." + ext;

System.out.println("filename===" + filename);

os = new FileOutputStream(context + "/photo/" + filename);

byte[] bytes = new byte[8192];
while ((is.read(bytes, 0, 8192)) != -1) {
os.write(bytes, 0, 8192);
}

if (os != null)
os.close();
if (is != null)
is.close();

request.setAttribute("result", "上传成功");



String name=uploadform.getName();

name=new String(name.getBytes("ISO8859-1"),"utf-8");

System.out.println("name==="+name);

} catch (FileNotFoundException e) {
e.printStackTrace();
request.setAttribute("result", "上传失败");
} catch (IOException e) {
e.printStackTrace();
request.setAttribute("result", "上传失败");
}

return mapping.findForward("upload");
}
}


struts-config.xml
=================
<?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="uploadForm" type="com.supersit.struts.form.UploadForm" />

</form-beans>

<global-exceptions />
<global-forwards />
<action-mappings >
<action
name="uploadForm"
attribute="uploadForm"
input="/upload.jsp"
path="/upload"
type="com.supersit.struts.action.UploadAction"
validate="false"
parameter="method">
<forward name="upload" path="/upload.jsp"></forward>
</action>

</action-mappings>

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

[/code]