Martian — Sun, 31 May 2009 14:23:00 GMT

Spring提供了发送电子邮件的功能�Q�它向用户屏蔽了底层邮�g�pȝ��的一些细节，同时代表客户端负责底层的资源处理�?br /> Spring的邮件服务支持主要是通过JavaMailSender�q�个接口实现的：

public interface JavaMailSender extends MailSender {
    MimeMessage createMimeMessage();

    MimeMessage createMimeMessage(InputStream contentStream) throws MailException;

    void send(MimeMessage mimeMessage) throws MailException;

    void send(MimeMessage[] mimeMessages) throws MailException;

    void send(MimeMessagePreparator mimeMessagePreparator) throws MailException;

    void send(MimeMessagePreparator[] mimeMessagePreparators) throws MailException;

}

�q�是JavaMailSender的接口源代码(去除注释),可以看到�Q�主要提供了createMimeMessage和send两个�Ҏ��。createMimeMessage�Ҏ��主要是用来创建JavaMail的MIME信�g�Q�而send则是发送电子邮件的主要�Ҏ��?br /> Spring中提供了JavaMailSender的简单实玎ͼ�org.springframework.mail.javamail.JavaMailSenderImpl。在JavaMailSendImpl�q�个�c�M��Q�实��C��JavaMailSender中定义的�Ҏ��的具体实现。而众所周知�Q�Spring是核心的功能是IOC�Q�所以通过Spring来发送电子邮�Ӟ��可以��用Spring强大的IOC功能�Q�下面就来看一下，怎么样在Spring中发送邮�Ӟ��
1. Spring配置文�g�Q�主要配�|�mailSender和对velocity的支�?br />

xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd"
    default-lazy-init="true" default-autowire="byName">

    <bean id="propertyConfigurer"
        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>classpath:mail.propertiesvalue>
            list>
        property>
    bean>

    <bean id="mailEngine" class="org.example.mailer.MailEngine">
        <property name="javaMailSender" ref="javaMailSender" />
        <property name="velocityEngine" ref="velocityEngine" />
    bean>

    <bean id="velocityEngine"
        class="org.springframework.ui.velocity.VelocityEngineFactoryBean">
        <property name="resourceLoaderPath" value="classpath:velocity" />
    bean>


    <bean id="javaMailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
        <property name="host" value="${mail.host}" />
        <property name="username" value="${mail.username}" />
        <property name="password" value="${mail.password}" />
        <property name="defaultEncoding" value="UTF-8">property>
        <property name="javaMailProperties">
            <props>
                <prop key="mail.smtp.auth">${mail.smtp.auth}prop>
                <prop key="mail.smtp.timeout">${mail.smtp.timeout}prop>
            props>
        property>
    bean>
beans>

在这个配�|�文件中�Q�通过propertyConfigurer�q�个bean加蝲了邮件的配置文�g�Q�mail.properties�Q�这个文件主要定义一些邮件服务的属�?使用的时候根据自��q��要求�q�行相应的配�|�，�q�里�?26的smtp服务��Z��):

mail.from=
mail.host=smtp.126.com
mail.username=
mail.password=

mail.smtp.auth=true
mail.smtp.timeout=25000

下面来看一�?span style="color: #0000ff;">MailEngine的实玎ͼ�

package org.example.mailer;

import java.util.Map;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.velocity.app.VelocityEngine;
import org.apache.velocity.exception.VelocityException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.mail.MailException;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.ui.velocity.VelocityEngineUtils;

public class MailEngine {
    protected final Log logger = LogFactory.getLog(getClass());

    private JavaMailSender javaMailSender;
    private VelocityEngine velocityEngine;

    public void setJavaMailSender(JavaMailSender javaMailSender) {
        this.javaMailSender = javaMailSender;
    }

    public void setVelocityEngine(VelocityEngine velocityEngine) {
        this.velocityEngine = velocityEngine;
    }

    public void sendMailWithVelocity() {
        MimeMessage msg = javaMailSender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(msg);
        String result = null;
        Map model = null;

        try {
            result = VelocityEngineUtils.mergeTemplateIntoString(
                    velocityEngine, "sendMail.vm", "UTF-8", model);//UTF-8为模板文件的字符�~�码
            helper.setFrom("邮�g发送�?/span>");
            helper.setSubject("��试Spring邮�g");
            helper.setTo("邮�g接收�?/span>");
            helper.setText(result);
            javaMailSender.send(msg);
        } catch (VelocityException e) {
            e.printStackTrace();
            logger.error(e.getMessage());
        } catch (MessagingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

    public boolean senaMail() {
        MimeMessage msg = javaMailSender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(msg);
        try {
            helper.setFrom("邮�g发送�?/span>");
            helper.setSubject("邮�g内容");
            helper.setTo("邮�g接收�?/span>");
            helper.setText("test spring mailer", true); // 如果发的不是html内容��L��true参数
            javaMailSender.send(msg);

        } catch (MessagingException e) {
            // TODO 自动生成 catch �?/span>
            if (logger.isWarnEnabled()) {
                logger.warn("邮�g信息导常! 邮�g标题�? ");
            }
            return false;
            // e.printStackTrace();
        } catch (MailException me) {
            // TODO: handle exception
            if (logger.isWarnEnabled()) {
                logger.warn("发送邮件失�? 邮�g标题�? ");
            }
            return false;
        }
        return true;
    }

    public static void main(String[] args) {
        BeanFactory bf = new ClassPathXmlApplicationContext("beans.xml");
        MailEngine mailEngine = (MailEngine) bf.getBean("mailEngine");
        // mailEngine.senaMail();
        mailEngine.sendMailWithVelocity();
    }
}

sendMailWithVelocity�Ҏ��主要是��用Velocity模板文�g来发送邮�Ӟ��Velocity模板文�g定义了邮件的内容,模板文�g的位�|�由resourceLoaderPath指定�Q�本例则在classpath下的velocity下，如果是web��目�Q�则位于/WEB-INF/classes/veloticy/目录下�?br />
执行main�Ҏ��Q�就可以发送邮件了�?br />

Martian 2009-05-31 22:23 发表评论

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