commons-fileupload应用

javaweb项目经常需要文件的上传下载，今天介绍一种简单的apache 的组件来实现文件上传comm

首先需要两个jar包的支持commons-fileupload-1.3.jar commons-io-2.4.jar放入WEB_INF的lib包下

上传的界面代码：

upload.html

<html>

<head>

<title>File upload</title>

</head>

<body>

<form name="myform" action="upload.jsp" method="post"

enctype="multipart/form-data">

Text1:<br>

File2:<br>

<br>

</form>

</body>

</html>

上传的处理jsp代码：

<%@ page language="java" contentType="text/html; charset=GBK"

pageEncoding="GB18030"%>

<%@ page import="org.apache.commons.fileupload.*"%>

<%@ page import="org.apache.commons.fileupload.servlet.*"%>

<%@ page import="org.apache.commons.fileupload.disk.*"%>

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

<%@ page import="java.io.*"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

String uploadPath="f:\\fileupload";

boolean isMultipart = ServletFileUpload.isMultipartContent(request);

if(isMultipart==true){

try{

FileItemFactory factory = new DiskFileItemFactory();

ServletFileUpload upload = new ServletFileUpload(factory);

List<FileItem> items = upload.parseRequest(request);//得到所有的文件

Iterator<FileItem> itr = items.iterator();

while(itr.hasNext()){//依次处理每个文件

FileItem item=(FileItem)itr.next();

String fileName=item.getName();//获得文件名，包括路径

if(item.isFormField()){

System.out.println("name ============== " + item.getFieldName()+new String(item.getString().getBytes("iso8859-1"),"GBK"));

}

else if(fileName!=null){

File savedFile=new File(uploadPath,item.getName());

item.write(savedFile);

}

out.print("upload succeed");

}

catch(Exception e){

e.printStackTrace();

}

else{

out.println("the enctype must be multipart/form-data");

}

<html>

<head>

<title>File upload</title>

</head>

<body>

</body>

</html>

upload2.html

<html>

<head>

<title>File upload</title>

</head>

<body>

<form name="myform" action="servlet/UploadServlet" method="post"

enctype="multipart/form-data">

Text1:<br>

File2:<br>

<br>

</form>

</body>

</html>

下面使用servle来处理上传：

UploadServlet.java

package com.zj.sample;

import java.io.File;

import java.io.IOException;

import java.util.Iterator;

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.disk.DiskFileItemFactory;

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

@SuppressWarnings("serial")

public class UploadServlet extends HttpServlet {

private String uploadPath = "f:\\fileupload"; // 上传文件的目录

private String tempPath = "f:\\fileupload\\buffer\\"; // 临时文件目录

File tempPathFile;

@SuppressWarnings("unchecked")

public void doPost(HttpServletRequest request, HttpServletResponse response)

throws IOException, ServletException {

try {

DiskFileItemFactory factory = new DiskFileItemFactory();

factory.setSizeThreshold(4096); // 设置缓冲区大小，这里是4kb

factory.setRepository(tempPathFile);// 设置缓冲区目录

ServletFileUpload upload = new ServletFileUpload(factory);

upload.setSizeMax(4194304); // 设置最大文件尺寸，这里是4MB

List<FileItem> items = upload.parseRequest(request);// 得到所有的文件

Iterator<FileItem> i = items.iterator();

while (i.hasNext()) {

FileItem fi = (FileItem) i.next();

if (fi.isFormField()) {

System.out.println("name ============== " + fi.getFieldName()+new String(fi.getString().getBytes("iso8859-1"),"GBK"));

} else {

String fileName = fi.getName();

if (fileName != null) {

File savedFile = new File(uploadPath,fileName);

fi.write(savedFile

补充：软件开发 , Java ,

上一个：Hibernate 注解
下一个：shell_awk

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