开发项目中使用JavaMailSender实现发送邮件Email功能代码

一、先在QQ邮箱中开启POP3/SMTP服务，然后会得到一个授权码，这个邮箱和授权码将用作登陆认证。

二、导入相关jar包：javax.mail.jar

三、引入配置文件：applicationContext-mail.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns="http://www.springframework.org/schema/beans" 
  xmlns:aop="http://www.springframework.org/schema/aop"
  xmlns:context="http://www.springframework.org/schema/context" 

xmlns:tx="http://www.springframework.org/schema/tx"
  xmlns:cache="http://www.springframework.org/schema/cache"
   xmlns:p="http://www.springframework.org/schema/p"
  xsi:schemaLocation="http://www.springframework.org/schema/beans 
     http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
     http://www.springframework.org/schema/aop
     http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
     http://www.springframework.org/schema/context
     http://www.springframework.org/schema/context/spring-context-4.0.xsd
     http://www.springframework.org/schema/tx
     http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
     http://www.springframework.org/schema/cache 
     http://www.springframework.org/schema/cache/spring-cache-4.0.xsd">

	<!--注册扫描器：扫描发送Email的工具类所在目录-->
	<context:component-scan base-package="com.hcz.util"/>

     <bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
		<!--发送邮件的服务器地址：下面地址可以查看
		https://service.mail.qq.com/cgi-bin/help?subtype=1&&id=28&&no=167-->
		 <property name="host" value="smtp.qq.com" />
		<property name="port" value="587" />
		 <!--发送者账号-->
		<property name="username" value="xxxxx@qq.com" />
		 <!--密钥-->
		<property name="password" value="第一步获取到的授权码" />
		<property name="protocol" value="smtp" />
		<property name="defaultEncoding" value="utf-8" />
		<property name="javaMailProperties">
			<props>
				<prop key="mail.smtp.auth">true</prop>
			</props>
		</property>
	</bean> 

    <!--<bean id="mail" class="com.hcz.service.mail.MailServiceImpl" p:sender-ref="mailSender"/>-->
 </beans>

四、创建工具类

@Component
public class EmailUtil {

    //发送邮件的组件，从Spring容器中获取进来
    @Autowired
    private JavaMailSender sender;

    public void sendMail(String to,String context,String subject){
        //邮件消息对象
        SimpleMailMessage msg = new SimpleMailMessage();
        msg.setTo(to);
        msg.setFrom("xxxxx@qq.com");
        msg.setSubject(subject);//标题
        msg.setText(context);//邮件内容
        sender.send(msg);//发送
        System.out.println("发送邮件成功");
    }
}

五、在service层调用发送Email的工具类

@Service
public class WzServiceImpl implements WzService {
    /**
     * 业务层需要组装和加工，可能会用到几张表，这时需要导入多个dao
     */
    @Autowired
    private CarDao carDao;
    @Autowired
    private WzDao wzDao;
    @Autowired
    private RuleDao ruleDao;
    @Autowired
    private EmailUtil emailUtil;

    @Override
    public int add(String carno, Integer ruleid, String wzaddress,
                   Date wztime, String phone, String remark, Integer adminid) {
        //页面输入是车牌号码，数据库先根据号码查询车牌完整信息，包括id和车主电话等
        System.out.println("车牌号："+carno);
        Car car = carDao.selectByNo(carno);
        System.out.println("car信息"+car);
        if (car == null){
            //如果找不到，说明应该是录错号码，返回0
            return 0;
        }
        //新增时候也要插入扣分和罚款，所以也要查询Rule的完整信息
        Rule rule = ruleDao.selectById(ruleid);
        System.out.println("rule信息"+rule);
        //插入违章信息
        int n = wzDao.insert(car.getId(),rule.getId(),wzaddress,wztime,
                rule.getPay(),rule.getScore(),phone,remark, adminid);
        System.out.println("插入信息"+n);
        //发送短信给车主
        //SmsUtil.sendSms(car.getPhone(),"尊敬的"+car.getUserName()+":你有一笔违章记录，请您及时确认违章内容："+rule.getName());
        //发送邮件【需要注入进来EmailUtil】
        emailUtil.sendMail(car.getUserEmail(),car.getNo()+":违章通知","尊敬的"
                +car.getUserName()+":你有一笔违章记录，请您及时确认违章内容："+rule.getName());
        System.out.println(car.getUserEmail());
        return n;
    }

    
}