文件上传问题(commons-fileupload)

Sleeping0804 2009-12-24 11:51:00

提交页面:

<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>

<html>

	<head>

		<title>Index</title>

	</head>

	<body>

	<form action="comm" method="post" enctype="multipart/form-data">

		<input type="file" name="f1"/><br />

		<input type="file" name="f2"/><br />

		<input type="file" name="f3"/><br />

		<input type="submit" value="提交"/>

		<input type="reset" value="重置"/>

	</form>

	

	</body>

</html>

处理请求的servlet:

package myFamily;



import java.io.File;

import java.io.IOException;

import java.io.PrintWriter;

import java.util.List;



import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;



import org.apache.commons.fileupload.FileItem;

import org.apache.commons.fileupload.FileItemFactory;

import org.apache.commons.fileupload.FileUploadException;

import org.apache.commons.fileupload.disk.DiskFileItemFactory;

import org.apache.commons.fileupload.servlet.ServletFileUpload;



public class Commons extends HttpServlet {



	protected void doPost(HttpServletRequest req, HttpServletResponse resp)

			throws ServletException, IOException {

		PrintWriter pw=resp.getWriter();

		

		FileItemFactory fact;

		DiskFileItemFactory dfact=new DiskFileItemFactory();

		

		ServletFileUpload upload=new ServletFileUpload(dfact);

		List ll;

		FileItem fi;

		

		dfact.setSizeThreshold(1024*100);	//100kb

		dfact.setRepository(new File("f:/buffer"));	//缓冲目录

		try {

			upload.setSizeMax(1024*1024*70);	//70MB

			ll=upload.parseRequest(req);

			for(int i=0; i<ll.size(); i++){		//表单输入域都是file,所以没有加判断

				fi=(FileItem)ll.get(i);

				fi.write(new File("f:/temp",fi.getName()));

			}

			

		} catch (FileUploadException e) {

			e.printStackTrace();

		} catch (Exception e) {

			e.printStackTrace();

		}

	}

}

两个问题:
1.我设置的最大尺寸是70mb,上传一个45mb的文件到f:/temp (该目录的确存在)
每次都抛:
java.io.FileNotFoundException: f:\temp (拒绝访问。)
但文件保存已经保存成功了。
为什么抛这种异常呢?
2.setSizeMax()方法设置的是单个文件的大小,还是所有文件的总大小？

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Sleeping0804 2009-12-24

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[Quote=引用 3 楼 nickycheng 的回复:]
哦，sorry，看错。第一个问题搞不清楚为什么会抛错。把错误堆栈贴出来看看
[/Quote]

如下:
java.io.FileNotFoundException: f:\temp (拒绝访问。)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(FileOutputStream.java:179)
at java.io.FileOutputStream.<init>(FileOutputStream.java:131)
at org.apache.commons.fileupload.disk.DiskFileItem.write(DiskFileItem.java:390)
at myFamily.Commons.doPost(Commons.java:39)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
at java.lang.Thread.run(Thread.java:619)

虽报错,但文件已正常保存在f:/temp中了

nickycheng 2009-12-24

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哦，sorry，看错。第一个问题搞不清楚为什么会抛错。把错误堆栈贴出来看看

nickycheng 2009-12-24

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fi.write(new File("f:/temp",fi.getName()));
这是写文件到 f:/temp （这是个没有后缀名的文件）
你已经存在f:/temp这个目录，所以报错。

应该
fi.write(new File("f:/temp/xxx.xx",fi.getName()));

setFileSizeMax
public void setFileSizeMax(long fileSizeMax)Sets the maximum allowed size of a single uploaded file, as opposed to getSizeMax().

Parameters:
fileSizeMax - Maximum size of a single uploaded file.
See Also:
getFileSizeMax()

Sleeping0804 2009-12-24