Java上传文件(简单例子)

jsp页面：

<%--有附件的话:要设置enctype属性;--%>

<html:formaction="submitPublishReply.do"method="POST"onsubmit="returncheck();"enctype="multipart/form-data">

附件：<inputtype="file"name="attach"/>

<inputtype="submit"value="回复"/>

</ul>

</html:form>

ActionForm:

privateFormFilefile;

Action：

importorg.apache.commons.fileupload.*;

importorg.apache.commons.fileupload.disk.*;

importorg.apache.commons.fileupload.servlet.*;

importjava.io.PrintWriter;

importjava.io.File;

importorg.apache.struts.upload.FormFile;

importjava.io.InputStream;

importjava.io.OutputStream;

importjava.io.FileOutputStream;

//附件

FormFilefile=(FormFile)replyForm.getFile();

if(file!=null&&file.getFileName().trim().length()>0){

StringfileName=file.getFileName();

byte[]b=file.getFileData();

Stringdir=request.getRealPath("/uploadfile");//request.getRealPath获得web应用程序在服务器的绝对路径

OutputStreamstreamOut=newFileOutputStream(dir+"/"+

fileName);

streamOut.write(b,0,b.length);

}