Spring+JavaMail+线程池实现异步发送邮件
我们系统存在大量发送邮件的需求,项目使用的是Spring框架而JavaMail也能很好的跟Spring进行集成,由于发送邮件最好还是使用异步进行发送,所以这里就采用线程池+JavaMail进行邮件发送,下面看具体代码实现:
Step1、引入JavaMail
<mail.version>1.4.7</mail.version>
<dependency>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
<version>${mail.version}</version>
</dependency>
Step2、Spring配置文件中配置MailSender和线程池
<!--MailSender-->
<bean id="javaMailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
<property name="host" value="${email.host}"/>
<property name="username" value="${email.username}"/>
<property name="password" value="${email.password}"/>
<property name="javaMailProperties">
<props>
<prop key="mail.smtp.auth">true</prop>
<prop key="mail.smtp.timeout">25000</prop>
<!--
<prop key="mail.smtp.starttls.enable">true</prop>
<prop key="mail.smtp.socketFactory.class">javax.net.ssl.SSLSocketFactory</prop>
-->
</props>
</property>
</bean>
<!--配置线程池-->
<bean id="taskExecutor" class="org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor">
<!-- 核心线程数 -->
<property name="corePoolSize" value="${executor.corePoolSize}" />
<!-- 最大线程数 -->
<property name="maxPoolSize" value="${executor.maxPoolSize}" />
<!-- 最大队列数 -->
<property name="queueCapacity" value="${executor.queueCapacity}" />
<!-- 线程池维护线程所允许的空闲时间 -->
<property name="keepAliveSeconds" value="${executor.keepAliveSeconds}" />
</bean>
Step3、新建邮件实体类,方便业务处理
import org.apache.commons.lang3.ArrayUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.util.Assert;
import javax.mail.internet.AddressException;
import java.util.Arrays;
/**
* <p>
* <code>MailEntry</code>
* </p>
* Description:
* 邮件实体类
* @author jianzh5
* @version 2017/3/31 17:00
* @since 1.0
*/
public class MailEntry {
/**
* 收件人
*/
private String[] recipients;
/**
* 抄送人
*/
private String[] carbonCopy;
/**
* 主题
*/
private String subject;
/**
* 内容
*/
private String text;
public String getSubject() {
return subject;
}
public void setSubject(String subject) {
this.subject = subject;
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
public String[] getRecipients() {
return recipients.clone();
}
public void setRecipients(String[] recipients) throws AddressException {
Assert.isTrue(ArrayUtils.isNotEmpty(recipients),"收件人不能为空");
String[] addresses = new String[recipients.length];
for (int i = 0; i < addresses.length; i++) {
addresses[i] = parseAddress(recipients[i]);
}
this.recipients = addresses;
}
public String[] getCarbonCopy() {
if(ArrayUtils.isNotEmpty(carbonCopy)){
return carbonCopy.clone();
}
return ArrayUtils.EMPTY_STRING_ARRAY;
}
public void setCarbonCopy(String[] carbonCopy) throws AddressException {
String[] addresses = new String[carbonCopy.length];
for (int i = 0; i < addresses.length; i++) {
addresses[i] = parseAddress(carbonCopy[i]);
}
this.carbonCopy = addresses;
}
/**
* @desc 只要设定邮件接受人的域账号即可自动增加企业后缀
* @author jianzh5
* @date 2017/4/1 13:43
* @param recipient 收件人域账号
* @return 带企业后缀的邮箱地址
* @throws AddressException
*/
private String parseAddress(String recipient) throws AddressException {
if(StringUtils.isEmpty(recipient)){
throw new AddressException("邮箱账号不能为空",recipient);
}
return recipient + "@company.com";
}
@Override public String toString() {
return "MailEntry{" +
"recipients=" + Arrays.toString(recipients) +
", carbonCopy=" + Arrays.toString(carbonCopy) +
", subject='" + subject + '\'' +
", text='" + text + '\'' +
'}';
}
}
由于我们是使用企业邮箱发送邮件,而一般业务都只能取到公司用户名而非真正的邮箱地址,所以在上面实体类里进行了一次转换,如果能直接拿到邮箱地址的话上面的转换是不需要的。收件人和抄送人都是支持数组形式的参数,所以在这里直接使用数组作为收件人、抄送人属性,发送邮件的时候只要直接设置成数组参数即可。
Step4、发送邮件业务层实现
import org.apache.commons.lang3.ArrayUtils;
import org.springframework.core.task.TaskExecutor;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
/**
* <p>
* <code>MailServiceImpl</code>
* </p>
* Description:
* 邮件系统实现类
* @author jianzh5
* @version 2017/3/31 17:10
* @since 1.0
*/
@Service
public class MailServiceImpl implements IMailService{
private LoggerUtil logger = LoggerUtil.getLogger(this.getClass());
@Resource
private TaskExecutor taskExecutor;
@Resource
private JavaMailSender javaMailSender;
@Override
public void sendMail(MailEntry mailEntry) {
MimeMessage message = javaMailSender.createMimeMessage();
try {
MimeMessageHelper helper = new MimeMessageHelper(message, true, "utf-8");
helper.setFrom("xxx@company.com");
helper.setTo(mailEntry.getRecipients()); //收件人
if(ArrayUtils.isNotEmpty(mailEntry.getCarbonCopy())){
helper.setCc(mailEntry.getCarbonCopy()); //抄送人
}
helper.setSubject(mailEntry.getSubject());
helper.setText(mailEntry.getText(),true);//设置为TRUE则可以使用Html标记
addSendMailTask(message);
} catch (MessagingException e) {
// e.printStackTrace();
logger.error("邮件转换异常,邮件详细信息为{}",e.getMessage());
}
}
/**
* @desc 使用多线程发送邮件
* @author jianzh5
* @date 2017/4/1 11:41
* @param message MimeMessage邮件封装类
*/
private void addSendMailTask(final MimeMessage message){
try{
taskExecutor.execute(new Runnable() {
@Override
public void run() {
javaMailSender.send(message);
}
});
}catch (Exception e){
logger.error("邮件发送异常,邮件详细信息为{}",e.getMessage());
}
}
}