java程序实现QQ邮件的发送：

我会带着你远行 2022-05-07 08:16 169阅读 0赞

1.要想远程登录QQ必须做如下处理：参考如下：

[https://blog.csdn.net/Tangs\_/article/details/79352310\#commentBox][https_blog.csdn.net_Tangs_article_details_79352310_commentBox]

通过以上文章可以实现用telnet工具命令行发qq邮件。

2.如果telnet命令不可识别：以下是win10安装telnet方法参考如下：

[https://jingyan.baidu.com/article/e73e26c09f6f4724adb6a7de.html][https_jingyan.baidu.com_article_e73e26c09f6f4724adb6a7de.html]

3.java实现：

package com.cl.socket2_12;
    
    import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.InputStreamReader;
    import java.io.OutputStream;
    import java.io.PrintWriter;
    import java.net.Inet4Address;
    import java.net.Socket;
    import java.net.UnknownHostException;
    import java.text.MessageFormat;
    
    public class MailSender {
    	private String smtpServer="smtp.qq.com";//SMTP邮件服务器的主机名
    	private int port=25;
    	
    	public static void main(String[] args) throws UnknownHostException, IOException {
    		Message msg=new Message("1292607434@qq.com",   //发件地址
    				"1184916545@qq.com",                   //收件方
    				"hello",                                //主题
    				"hi,I miss yuo very much.");             //内容
    		new MailSender().sendMail(msg);
    	}
    
    	private void sendMail(Message msg) {
    		Socket socket = null;
    		try{
    			socket=new Socket(smtpServer,port);
    			BufferedReader br=getReader(socket);          //从服务器读
    			PrintWriter pw=getWriter(socket);             //写入aocket
    			String localhost=Inet4Address.getLocalHost().getHostName();    //本地主机名
    			
    			//邮箱登录账号和密码，编码
    			String userID="1292607434@qq.com";             
    			String pass="fbhcgilkeiapijge";
    			userID=new sun.misc.BASE64Encoder().encode(userID.getBytes());
    			pass=new sun.misc.BASE64Encoder().encode(pass.getBytes());
    			sendAndReceive(null,br,pw);
    			//qq邮箱服务器通信过程：客户端发送的“”通过pw写出
    			sendAndReceive("HELO "+localhost,br,pw);   
    			//qq邮箱服务器特有的用户验证过程
    			sendAndReceive("STARTTLS auth login",br ,pw);
    			sendAndReceive("auth login",br,pw);
    			sendAndReceive(userID, br, pw);
    			sendAndReceive(pass, br, pw);
    			sendAndReceive("MAIL FROM:"+msg.from,br,pw);
    			sendAndReceive("RCPT TO:"+msg.to,br,pw);
    			sendAndReceive("DATA",br,pw);
    			pw.println(msg.data);
    			System.out.println("Cliet>"+msg.data);
    			sendAndReceive(".",br,pw);
    			sendAndReceive("QUIT",br,pw);
    		}catch (Exception e) {
    			e.printStackTrace();
    		}finally{
    			if(socket!=null){
    				try {
    					socket.close();
    				} catch (IOException e) {
    					// TODO Auto-generated catch block
    					e.printStackTrace();
    				}
    			}
    		}
    		
    	}
    	/**
    	 * 
    	 * @param str：客户端发送信息
    	 * @param br：读取服务器的响应消息流
    	 * @param pw：发送到服务器的流
    	 * @throws IOException
    	 */
    	private void sendAndReceive(String str, BufferedReader br, PrintWriter pw) throws IOException {
    		
    		if(str!=null){
    			System.out.println("Client>"+str);
    			pw.println(str);
    		}
    		String response;
    		if((response=br.readLine())!=null){
    			System.out.println("Server>"+response);
    		}
    	}
    
    	private BufferedReader getReader(Socket scoket) throws IOException{
    		InputStream in=scoket.getInputStream();
    		return new BufferedReader(new InputStreamReader(in));
    	}
    	private PrintWriter getWriter(Socket socket) throws IOException{
    		OutputStream out=socket.getOutputStream();
    		return new PrintWriter(out,true);
    	}
    	
    }
    
    class Message{
    	String from;
    	String to;
    	String subject;
    	String content;
    	String data;
    	public Message(String from, String to, String subject, String content) {
    		super();
    		this.from = from;
    		this.to = to;
    		this.subject = subject;
    		this.content = content;
    		this.data="Subject:"+subject+"\r\n"+content;
    	}
    }

4.以下是结果：

![结果][70]

[https_blog.csdn.net_Tangs_article_details_79352310_commentBox]: https://blog.csdn.net/Tangs_/article/details/79352310#commentBox
[https_jingyan.baidu.com_article_e73e26c09f6f4724adb6a7de.html]: https://jingyan.baidu.com/article/e73e26c09f6f4724adb6a7de.html
[70]: /images/20220506/4f067d936f2e478e98a1a95eb550b22b.png