《pro Spring》学习笔记之使用Spring+James邮件服务器发送普通HTML邮件

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本文介绍如何使用Spring框架发送HTML格式的电子邮件。通过定义一个抽象类来封装邮件配置，并利用MimeMessageHelper处理MIME消息，实现了HTML邮件的发送。

首先，请参考这一片文章，配置好James邮件服务器

http://blog.youkuaiyun.com/daryl715/archive/2007/09/14/1784869.aspx

发送MIME消息的一个主要缺点是你不能使用SimpleMailMessage来做外部配置，因为JavaMailSenderImp的MIME相关方法不能用在SimpleMailMessage上，由于这个原因，通常最好做法就是创建一个用来封装MIME的消息的类，以便Spring能在外部进行配置，我们首先定义一个允许外部配置消息的通用基类，如下

package ch15.SimpleMimeMail;

import org.springframework.mail.javamail.JavaMailSenderImpl;

public abstract class AbstractMessageSender {

protected String to;

protected String from;

protected String subject;

protected String text;

protected JavaMailSenderImpl sender;

public String getTo() {

return to;

}

public void setTo(String to) {

this.to = to;

}

public String getFrom() {

return from;

}

public void setFrom(String from) {

this.from = from;

}

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 JavaMailSenderImpl getSender() {

return sender;

}

public void setSender(JavaMailSenderImpl sender) {

this.sender = sender;

}

邮件发送类(AbstractMessageSender 的实现类)

一个HTML消息的创建与纯文本电子邮件差不多，但你必须指定你所创建的消息的MIME类型是text/html,尽管你不能使用SimpleMailMessage,但Spring提供了MimiMessageHelper类，他允许使用与SimpleMailMessage相似的方式处理MIME消息，避免了一些JavaMail

package ch15.SimpleMimeMail;

import javax.mail.MessagingException;

import javax.mail.internet.MimeMessage;

import org.springframework.mail.javamail.MimeMessageHelper;

public class SimpleHTMLMessageSender extends AbstractMessageSender {

private MimeMessageHelper helper;

private MimeMessage msg;

public void sendMessage(){

msg=sender.createMimeMessage();

helper=new MimeMessageHelper(msg);

try {

helper.setTo(to);

helper.setFrom(from);

helper.setSubject(subject);

helper.setText(text,true);//true表示text/html格式邮件

}catch (MessagingException e) {

System.out.println(e.getMessage());

}

sender.send(msg);

}

这里需要啰嗦的是MimeMessage实例是由JavaMailSenderImpl创建的，MimiMessageHelper用来设置一个MimiMEssage实例，其setText方法，接受两个参数，一个是html页面语言，一个是true,表明这个消息是一个html消息

配置文件：

<? 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" >

< bean id ="sender" class ="org.springframework.mail.javamail.JavaMailSenderImpl" >

< property name ="host" >

< value > king.cn </ value >

</ property >

< property name ="username" >

< value > gaoxiang </ value >

</ property >

< property name ="password" >

< value > gaoxiang </ value >

</ property >

< property name ="javaMailProperties" >

< props >

< prop key ="mail.smtp.auth" > true </ prop >

< prop key ="mail.smtp.timeout" > 10000 </ prop >

</ props >

</ property >

</ bean >

< bean id ="messageSender" class ="ch15.SimpleMimeMail.SimpleHTMLMessageSender" >

< property name ="sender" >

< ref bean ="sender" />

</ property >

< property name ="to" >

< value > daryl715@tom.com </ value >

</ property >

< property name ="from" >

< value > gaoxiang@king.cn </ value >

</ property >

< property name ="subject" >

< value > html mime mail </ value >

</ property >

< property name ="text" >

< value > <![CDATA[ <html><head><body>this is a html mail</body></head></html> ]]> </ value >

</ property >

</ bean >

</ beans >

测试代码：

package ch15.SimpleMimeMail;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import org.springframework.mail.SimpleMailMessage;

import org.springframework.mail.javamail.JavaMailSenderImpl;

public class SimpleMimeTest {

public static void main(String[] args) throws Exception {

ApplicationContext context=new ClassPathXmlApplicationContext("ch15/SimpleMimeMail/applicationContext.xml");

SimpleHTMLMessageSender mailSender=(SimpleHTMLMessageSender)context.getBean("messageSender");

for (int i = 0; i < 10; i++) {

mailSender.sendMessage();

System.out.println("成功");

Thread.sleep(2000); //发送后延时2秒钟

}