日期:2014-05-16  浏览次数:20949 次

JSP上传文件Servlet(Apache fileUpload)同时text文本

以Apache组织的commons项目中的FileUpload项目做为jsp的文件上传组件。

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在开始之前你要准备以下几个东西:
1. commons-FileUpload ?包?
? 下载地址:http://commons.apache.org/fileupload/
2. commons-IO ?包?
? 下载地址:http://commons.apache.org/io/
3. Commons-BeanUtils ?包?
? 下载地址:http://commons.apache.org/beanutils/

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准备工作完成就开始了:

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1、新建一个WEB项目upload;

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2、把下载好了的jar包复制到项目的WEB-INF/lib目录下;


3、新建或修改JSP文件:

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
	String path = request.getContextPath();
	String basePath = request.getScheme() + "://"
			+ request.getServerName() + ":" + request.getServerPort()
			+ path + "/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
	<head>
		<base href="<%=basePath%>">

		<title>My JSP 'index.jsp' starting page</title>
		<meta http-equiv="pragma" content="no-cache">
		<meta http-equiv="cache-control" content="no-cache">
		<meta http-equiv="expires" content="0">
		<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
		<meta http-equiv="description" content="This is my page">
		<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->
	</head>

	<body>
		This is my upload JSP page.
		<br>
		<form name="upform" action="UploadServlet" method="POST" enctype="multipart/form-data">
			<input type="file" name="file1" id="file1" />
			<br />
			<input type="file" name="file2" if="file2" />
			<br />
			<input type="file" name="file3" id="file3" />
			<br />
			<input type="text" name="text1" id="text1" />
			<br />
			<input type="submit" value="Submit" />
			<input type="reset" />
		</form>
	</body>
</html>

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上面有几个要注意的地方:

a、method在这时必须是post的;

b、enctype="multipart/form-data"使表单提交的流而不是表单文本。

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4、书写UploadServlet.java

package demo.servlet;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemIterator;
import org.apache.commons.fileupload.FileItemStream;
import org.apache.commons.fileupload.ProgressListener;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.fileupload.util.Streams;

/**
 * Servlet implementation class for Servlet: UploadServlet
 */
public class UploadServlet extends javax.servlet.http.HttpServlet implements
		javax.servlet.Servlet {
	/** 初始化上传文件的临时存放目录 */
	File tmpDir = null;
	/** 初始化上传文件后的保存目录 */
	File saveDir = null;

	public UploadServlet() {
		super();
	}

	protected void doGet(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		doPost(request, response);
	}

	protected void doPost(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		request.setCharacterEncoding("utf-8");
		try {
			// 检查是否是文件上传类型的请求 enctype="multipart/form-data"
			if (Serv