在spring利用javamail，quartz定时发送邮件

在web开发中，我们经常需要定时完成一些功能。比如定义统计报表啊，统计用户排名等等。利用spring就可以轻松地做到这些任务。下面我就以定时发送邮件来来展示如何利用spring定时发送邮件，以及spring对JavaMail的简化。
MailService.java类

package com.open.quartz;
import org.springframework.mail.MailException;
import org.springframework.mail.MailSender;
import org.springframework.mail.SimpleMailMessage;
public class MailService {
    private MailSender mailSender;
    private SimpleMailMessage mailMessage;//邮件模板
    public void sendMail() {
          System.out.println("-----------发送邮件!---------");
          SimpleMailMessage msg=new SimpleMailMessage(this.mailMessage);
          msg.setText("this is a test mail");
        try {
              mailSender.send(msg);
          } catch (MailException e) {
              e.printStackTrace();
          }
          System.out.println("-----------发送成功!---------");
      }
     //省略set,get方法
}

在web.xml里添加以下代码

<listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

在WEB-INF目录下添加applicationContext.xml文件

<beans>
    <bean id="mailSender"
          class="org.springframework.mail.javamail.JavaMailSenderImpl">
        <property name="host" value="smtp.163.com"/>
            <!-- 有些邮件服务器发送邮件需要认证，所以必须提供帐号    -->
        <property name="username" value="填入用户名"/>
        <property name="password" value="填入密码"/>
        <property name="javaMailProperties">
            <props>
                <prop key="mail.smtp.auth">true</prop>
            </props>
        </property>
    </bean>
      <!--一个邮件模板-->
    <bean id="mailMessage" class="org.springframework.mail.SimpleMailMessage">
        <property name="to" value="[e-mail]"/>
        <property name="from" value="[e-mail]"/>
        <property name="subject" value="test"/>
    </bean>
        <bean id="ms" class="com.open.quartz.MailService" autowire="byName"/>
    <bean id="reportJob"
          class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
        <property name="targetObject" ref="ms"/>
        <property name="targetMethod" value="sendMail"/>
    </bean>
         <!--一个简单的调度器-->
    <bean id="simpleTrigger"
          class="org.springframework.scheduling.quartz.SimpleTriggerBean">
        <property name="jobDetail" ref="reportJob"/>
        <property name="startDelay" value="1"/>     在web启动多少毫秒后启动任务
        <property name="repeatInterval" value="100000000"/> 表示没隔多少毫秒启动
    </bean>
         <!--一个定时的调度器-->
    <bean id="cronTrigger"
          class="org.springframework.scheduling.quartz.CronTriggerBean">
        <property name="jobDetail" ref="reportJob"/>
        <property name="cronExpression" value="0 0 6 * * ?"/> 指明每天早上6点启动任务,表达式的解释见下篇文章
    </bean>
    <bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
        <property name="triggers">
            <list>
                <ref bean="simpleTrigger"/>
            </list>
        </property>
    </bean>
</bean>

涉及的jar包有:spring.jar,javamail.jar,activation.jar,quartz.jar