[网络协议]发送邮件并实现邮件内容换行

package miaosu.utils;

import com.sun.mail.util.MailSSLSocketFactory;

import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.Properties;
/**
 * Created by 马洋 on 2021/10/21 16:36
 */
public class EmailSend {


	/**
	 *
	 * @param MailTitle 邮件标题
	 * @param MailContent 邮件内容
	 * @param Sender 邮件发送人
	 * @param MailReceiver 邮件接收人(可多个)
	 * @param AuthorizationCode 邮件发送人邮箱授权码 cizojpskiplhbfhb
	 */
	public static void send(String MailTitle,String MailContent,String Sender,String MailReceiver,String AuthorizationCode){
		try {
			//创建一个配置文件并保存
			Properties properties = new Properties();
			properties.setProperty("mail.host","smtp.qq.com");
			properties.setProperty("mail.transport.protocol","smtp");
			properties.setProperty("mail.smtp.auth","true");


			//QQ存在一个特性设置SSL加密
			MailSSLSocketFactory sf = new MailSSLSocketFactory();
			sf.setTrustAllHosts(true);
			properties.put("mail.smtp.ssl.enable", "true");
			properties.put("mail.smtp.ssl.socketFactory", sf);


			//创建一个session对象
			Session session = Session.getDefaultInstance(properties, new Authenticator() {
				@Override
				protected PasswordAuthentication getPasswordAuthentication() {
					return new PasswordAuthentication(Sender,AuthorizationCode);
				}
			});
			//开启debug模式
			session.setDebug(true);
			//获取连接对象
			Transport transport = session.getTransport();
			//连接服务器
			transport.connect("smtp.qq.com",Sender,AuthorizationCode);
			//创建邮件对象
			MimeMessage mimeMessage = new MimeMessage(session);
			//邮件发送人
			mimeMessage.setFrom(new InternetAddress(Sender));
			//邮件接收人
			mimeMessage.setRecipient(Message.RecipientType.TO,new InternetAddress(MailReceiver));
			//邮件标题
			mimeMessage.setSubject(MailTitle);
			//邮件内容
			mimeMessage.setContent(MailContent,"text/html;charset=UTF-8");

			//发送邮件
			transport.sendMessage(mimeMessage,mimeMessage.getAllRecipients());

			//关闭连接
			transport.close();
		} catch (Exception e) {
			System.out.println("邮件这里出错了");
		}
	}
}

邮件实现文本换行用"< br >"实现