使用java发送qq邮件

首先要导入maven依赖：

 <dependency>
      <groupId>com.sun.mail</groupId>
      <artifactId>javax.mail</artifactId>
      <version>1.6.2</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/javax.activation/activation -->
    <dependency>
      <groupId>javax.activation</groupId>
      <artifactId>activation</artifactId>
      <version>1.1.1</version>
    </dependency>

注意这里不要导错依赖，一开始我是导入的下面的依赖：

  <!-- https://mvnrepository.com/artifact/javax.mail/mail -->
    <dependency>
      <groupId>javax.mail</groupId>
      <artifactId>mail</artifactId>
      <version>1.4.7</version>
    </dependency>

程序没有语法错误，但是就是一直报错：

Exception in thread "main" javax.mail.MessagingException: Could not connect to SMTP host: smtp.qq.com, port: 465;
  nested exception is:
	javax.net.ssl.SSLHandshakeException: No appropriate protocol (protocol is disabled or cipher suites are inappropriate)
	at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1961)
	at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:654)
	at javax.mail.Service.connect(Service.java:295)
	at javax.mail.Service.connect(Service.java:176)
	at com.zang.mail.SimpleMail.main(SimpleMail.java:48)
Caused by: javax.net.ssl.SSLHandshakeException: No appropriate protocol (protocol is disabled or cipher suites are inappropriate)
	at java.base/sun.security.ssl.HandshakeContext.<init>(HandshakeContext.java:170)
	at java.base/sun.security.ssl.ClientHandshakeContext.<init>(ClientHandshakeContext.java:98)
	at java.base/sun.security.ssl.TransportContext.kickstart(TransportContext.java:238)
	at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:394)
	at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:373)
	at com.sun.mail.util.SocketFetcher.configureSSLSocket(SocketFetcher.java:549)
	at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:354)
	at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:237)
	at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1927)
	... 4 more

Process finished with exit code 1

最后附上代码：

import com.sun.mail.util.MailSSLSocketFactory;

import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.Properties;

public class SimpleMail {
    public static void main(String[] args) throws Exception{
        Properties properties = new Properties();
        //设置QQ邮件服务器
        properties.setProperty("mail.host","smtp.qq.com");
        //邮件发送协议
        properties.setProperty("mail.transport.protocol","smtp");
        //需要验证用户名密码
        properties.setProperty("mail.smtp.auth","true");
        
        //还要设置SSL加密，加上以下代码即可
        MailSSLSocketFactory mailSSLSocketFactory = new MailSSLSocketFactory();
        mailSSLSocketFactory.setTrustAllHosts(true);
        properties.put("mail.smtp.ssl.enable","true");
        properties.put("mail.smtp.ssl.socketFactory",mailSSLSocketFactory);


        //使用JavaMail发送邮件的5个步骤

        //1、创建定义整个应用程序所需环境信息的 Session 对象
        Session session = Session.getDefaultInstance(properties, new Authenticator() {
            @Override
            public PasswordAuthentication getPasswordAuthentication() {
               //发件人用户名，授权码
                return new PasswordAuthentication("邮箱","授权码");
            }
        });

        //开启Session的debug模式，这样就可以查看程序发送Email的运行状态

        session.setDebug(true);
        //2、通过session得到transport对象
        Transport transport = session.getTransport();

        //3、使用用户名和授权码连上邮件服务器
        transport.connect("smtp.qq.com","邮箱","授权码");
        //4、创建邮件：写邮件
        //注意需要传递Session
        MimeMessage message = new MimeMessage(session);
        //指明邮件的发件人
        message.setFrom(new InternetAddress("邮箱"));
        //指明邮件的收件人，现在发件人和收件人是一样的，就是自己给自己发
        message.setRecipient(Message.RecipientType.TO , new InternetAddress("邮箱"));
        message.setSubject("只包含文本的简单邮件");
        message.setContent("你好啊","text/html;charset=UTF-8");
        //5、发送邮件
        transport.sendMessage(message,message.getAllRecipients());

        //6、关闭连接
        transport.close();
    }

}