首先加程式碼配置檔案來一個

mail.properties

mail.smtp.host=smtp.qq.com

mail.smtp.port=465

mail.smtp.SSLport=587

mail.smtp.starttlsEnable=true

mail.smtp.auth=true

[email protected]

mail.smtp.password=qrqzbcfslyhaai

mail.smtp.timeout=50000

mail.smtp.connectiontimeout=50000

mail.smtp.nickname=ewe

首先要去騰訊qq的設定===》賬戶》》開通授權碼，第三方登陸需要授權碼當成密碼使用

然後在springboot引入這個配置檔案

package com.ewe.core.utils;



import java.util.Arrays;
import java.util.Date;
import java.util.List;
import java.util.Properties;

import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;


import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;

import com.ewe.core.datasource.TransactionAspect;
import com.ewe.user.model.BatchSendMessage;
@Component
@ConfigurationProperties(prefix="mail.smtp")
@PropertySource("mail.properties")
public class MailUtil {
	//("${mail.smtp.host}")
	private String host;
	//("${mail.smtp.port}")
	private String port;
	//("${mail.smtp.SSLport}")
	private String SSLport;
	//("${mail.smtp.starttlsEnable}")
	private String starttlsEnable;
	//("${mail.smtp.auth}")
	private String auth;
	//("${mail.smtp.connectiontimeout}")
	private String connectiontimeout;
	//("${mail.smtp.account}")
	private String account;
	//("${mail.smtp.password}")
	private String password;
	//("${mail.smtp.timeout}")
	private String timeout;
	
    private String nickname ="ewe";//傳送者,顯示的發件人名字
	protected static Log LOGGER = LogFactory.getLog(MailUtil.class);
	 //帶CC(抄送)的郵件傳送
    public boolean sendSSLEmailWithCC(List<String> listEmails, List<String>  cc, String title, String content ,List<String> bcc) throws Exception {
    	LOGGER.info("開始傳送郵件，email==>"+listEmails+",title==>"+title);
    	Properties props = System.getProperties();
        props.put("mail.smtp.host", host);
        // 指定協議  
        props.put("mail.transport.protocol", "smtp");  
        props.put("mail.smtp.port", SSLport);
        props.put("mail.smtp.starttls.enable", starttlsEnable);
        
        props.put("mail.smtp.auth", auth);
        props.put("mail.smtp.connectiontimeout", connectiontimeout);
        props.put("mail.smtp.timeout", timeout);
        props.put("mail.smtp.debug", true);
        Transport transport = null;
        Session session = Session.getDefaultInstance(props, null);
        transport = session.getTransport("smtp");
        transport.connect(host, account, password);
        MimeMessage msg = new MimeMessage(session);
        msg.setSentDate(new Date());
        InternetAddress fromAddress = new InternetAddress(account,nickname);
        msg.setFrom(fromAddress);
        InternetAddress[] toAddress = new InternetAddress[listEmails.size()];
        for(int k = 0;k<listEmails.size();k++){
        	String emailAddress = listEmails.get(k);
        	new InternetAddress(emailAddress);
        		toAddress[k]=new InternetAddress(emailAddress);
        }
        LOGGER.debug("當前需要傳送郵件的地址資訊============>{}"+Arrays.deepToString(toAddress));
        msg.addRecipients(Message.RecipientType.TO, toAddress);
        
        //增加CC功能
        if(cc != null) {
        	InternetAddress[] ccAddress = new InternetAddress[cc.size()];
        	for(int k = 0;k<cc.size();k++){
        		String emailAddress = cc.get(k);
        		new InternetAddress(emailAddress);
        			ccAddress[k]=new InternetAddress(emailAddress);
        	}
        	msg.addRecipients(Message.RecipientType.CC, ccAddress);
        }
        //增加BCC功能
        if(bcc != null) {
        	InternetAddress[] bccAddress = new InternetAddress[bcc.size()];
        	for(int k = 0;k<bcc.size();k++){
        		String emailAddress = bcc.get(k);
        		new InternetAddress(emailAddress);
        			bccAddress[k]=new InternetAddress(emailAddress);
        	}
        	msg.addRecipients(Message.RecipientType.BCC, bccAddress);
        }
        msg.setSubject(title, "UTF-8");  
        //傳送文字郵件
        msg.setContent(content, "text/html; charset=utf-8");
        transport.sendMessage(msg, msg.getAllRecipients());
        LOGGER.info("郵件已傳送");
        return true;
    }

	public String getHost() {
		return host;
	}

	public void setHost(String host) {
		this.host = host;
	}

	public String getPort() {
		return port;
	}
	public void setPort(String port) {
		this.port = port;
	}
	public String getSSLport() {
		return SSLport;
	}
	public void setSSLport(String sSLport) {
		SSLport = sSLport;
	}
	public String getStarttlsEnable() {
		return starttlsEnable;
	}
	public void setStarttlsEnable(String starttlsEnable) {
		this.starttlsEnable = starttlsEnable;
	}
	public String getAuth() {
		return auth;
	}
	public void setAuth(String auth) {
		this.auth = auth;
	}
	public String getConnectiontimeout() {
		return connectiontimeout;
	}
	public void setConnectiontimeout(String connectiontimeout) {
		this.connectiontimeout = connectiontimeout;
	}
	public String getAccount() {
		return account;
	}
	public void setAccount(String account) {
		this.account = account;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	public String getTimeout() {
		return timeout;
	}
	public void setTimeout(String timeout) {
		this.timeout = timeout;
	}
	public static Log getLOGGER() {
		return LOGGER;
	}
	public static void setLOGGER(Log lOGGER) {
		LOGGER = lOGGER;
	}

	public String getMailTitle() {
		return nickname;
	}

	public void setMailTitle(String nickname) {
		this.nickname = nickname;
	}

    
    
}
 

依賴maven加的是

		 <!-- email -->
		<dependency>
			<groupId>com.sun.mail</groupId>
			<artifactId>javax.mail</artifactId>
			<version>1.5.4</version>
		</dependency>