【java开发的邮件发送程序】
Java的网络功能非常强大,开发和使用也非常简单,难怪microsoft极力要争回程序语言的霸主地位。根据smtp协议使用java Socket写了一个发送邮件的程序,
实现的原理非常简单,首先建立和邮件服务器的Socket连接,然后进行win7 vista xp系统优化教程和服务器握手,然后发送smtp指令,并封装邮件体,然后发送即可。
import java.net.*;
import java.io.*;
import java.util.*;
public class SMTPSender{
Socket socket=null;
PrintWriter outData=null;
BufferedReader inData=null;
String smtpServer="";
String user="";
String pass="";
String from="";
String LINEFEED=" ";
boolean isNeedAuthLogin=false;
Vector to=new Vector();
public static void main(String[] args){
SMTPSender smtp=new SMTPSender();
smtp.setMailServer("mail.ehawa.com");
smtp.setMailFrom("root@ehawa.com","???","???");
smtp.addMailTo("root@ehawa.com");
if(smtp.send("hello","这是一个测试!")){
System.out.println("邮件发送成功!");
}else System.out.println("邮件发送失败!");
}
public void setMailServer(String s){
smtpServer=s;
}
public void setMailFrom(String s,String uid,String pwd){
this.from=s;
this.user=uid;
this.pass=pwd;
this.isNeedAuthLogin=(this.user!=null&&this.pass!=null&&!this.user.equals("")&&!this.pass.equals(""));
}
public boolean addMailTo(String mailAddr){
to.addElement(mailAddr);
return true;
}
public boolean send(String subject,String content){
try{
if(smtpServer==null||smtpServer.equals(""))return false;
if(from==null||from.equals(""))return false;
if(to.size()<1)return false;
socket=new Socket(smtpServer,25);
outData=new PrintWriter(socket.getOutputStream());
inData=new BufferedReader(new InputStreamReader(socket.getInputStream()));
//与邮件服务器连接成功
readResponse("220");
//HELO host
sendRequest("HELO "+smtpServer+LINEFEED);
readResponse("250");
if(isNeedAuthLogin){
//AUTH LOGIN
sendRequest("AUTH LOGIN"+LINEFEED);
readResponse("334");
//USERNAME:
sendRequest(new String(Base64.encodeString(user))+LINEFEED);
readResponse("334");
//PASSWORD:
sendRequest(new String(Base64.encodeString(pass))+LINEFEED);
readResponse("235");
}
//MAIL FROM:<..>
sendRequest("MAIL FROM:<"+from+">"+LINEFEED);
readResponse("250");
//RCPT TO:<..>
for(Enumeration enu=to.elements();enu.hasMoreElements();){
String to1=(String)enu.nextElement();
sendRequest("RCPT To:<"+to1+">"+LINEFEED);
readResponse("250");
}