send2.java

基于java开发的邮件系统

package com.servlet;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;
import java.util.Properties;

import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.Message;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.internet.MimeUtility;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.oreilly.servlet.MultipartRequest;

public class SEND2 extends HttpServlet {

	
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/html;charset=gb2312");
		PrintWriter out = response.getWriter();
		request.setCharacterEncoding("gb2312");
		//重新封装请求对象--oreilly
		MultipartRequest req=new MultipartRequest(request,".",5*1024*1024,"GB2312");
		
		String from = req.getParameter("from");
		String to = req.getParameter("to");
		String subject = req.getParameter("subject");
		String context = req.getParameter("context");
		String type=req.getParameter("type");
		//获取文件名
		String filename=req.getFilesystemName("filename");
		// 确定要发送的邮件服务器的地址
		String mailserver = "dudonghui";
		// 设置邮件的传输协议
		try {
			Properties prop = System.getProperties();
			prop.put("mail.smtp.host", mailserver);
			// 建立邮件发送的连接
			Session session = Session.getDefaultInstance(prop, null);
			// 创建发送的信息的载体
			Message msg = new MimeMessage(session);
			// 设置相关的邮件属性
			msg.setFrom(new InternetAddress(from));
			// 点到点的发送
			msg.setRecipient(Message.RecipientType.TO, new InternetAddress(to));
			//如何处理文件的上传
			if(filename!=null){
				//File file=new File(filename);//存留备份
				MimeBodyPart mbp1=new MimeBodyPart();
				mbp1.setContent(context, type+";charset=GB2312");//对于邮件的普通信息的处理
				//附件的处理
				MimeBodyPart mbp2=new MimeBodyPart();
				FileDataSource fds=new FileDataSource(filename);
				mbp2.setDataHandler(new DataHandler(fds));
				mbp2.setFileName(MimeUtility.encodeText(fds.getName(),"GB2312","B"));
				/*
				 * file-----inputStream--|--FileDataSource---DataHandler(fds)接口的封装---mpb2
				 * */
				Multipart mp=new MimeMultipart();
				mp.addBodyPart(mbp1);
				mp.addBodyPart(mbp2);
				msg.setContent(mp);
				
			}
			else{
				msg.setContent(context, type+";charset=GB2312");
				//信封的书写格式
			}
			
			
			
			
			
			
			
			// 发送
			Transport.send(msg);
		} catch (Exception e) {

		}

		out.print("send ok"+"<br>");
		out.print("<a href='http://localhost/mail/index.asp'>查看信件</a>");
		out.flush();
		out.close();
	}

}