《pro Spring》学习笔记之使用Sprin+James邮件服务器发送可替换的HTML和纯文本邮件

来源：互联网发布：ios付费软件退款编辑：程序博客网时间：2024/05/22 05:26

所谓可替换的意思就是说，同时发送两个内容，一个是HTML的，一个是纯文本的，具体现实那个内容要依据用户邮件客户端的配置来定

当需要对MIME消息就行更多的控制，你可以建立一个MimeMessagePreparator回调借口的实例，并把它传入JavaMailSender.send()方法，替换掉MimeMessage

<?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">

</property>

</bean>

</property>

<value>gaoxiang</value>

</property>

<value>gaoxiang</value>

</property>

<props>

</props>

</property>

</bean>

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

</property>

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

</property>

</property>

</property>

</property>

</bean>

</beans>

package ch15.SimpleChangeMail;

import org.springframework.mail.javamail.JavaMailSenderImpl;

public class MessageSender {

protected JavaMailSenderImpl sender;

public void sendMessage(MessagePreparator msgP){

sender.send(msgP);

}

public JavaMailSenderImpl getSender() {

return sender;

}

public void setSender(JavaMailSenderImpl sender) {

this.sender = sender;

}

package ch15.SimpleChangeMail;

import javax.mail.BodyPart;

import javax.mail.Message;

import javax.mail.internet.InternetAddress;

import javax.mail.internet.MimeBodyPart;

import javax.mail.internet.MimeMessage;

import javax.mail.internet.MimeMultipart;

import org.springframework.mail.javamail.MimeMessagePreparator;

public class MessagePreparator implements MimeMessagePreparator {

private String to;

private String from;

private String htmlContent;

private String textContent;

private String subject;

public String getHtmlContent() {

return htmlContent;

}

public void setHtmlContent(String htmlContent) {

this.htmlContent = htmlContent;

}

public String getTextContent() {

return textContent;

}

public void setTextContent(String textContent) {

this.textContent = textContent;

}

public String getSubject() {

return subject;

}

public void setSubject(String subject) {

this.subject = subject;

}

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 void prepare(MimeMessage msg) throws Exception {

//设置邮件信息

msg.addFrom(InternetAddress.parse(from));

msg.addRecipients(Message.RecipientType.TO, InternetAddress.parse(to));

msg.setSubject(subject);

//创建multipart/alternative的包装器

MimeMultipart mimeMultipart=new MimeMultipart();

msg.setContent(mimeMultipart);

//创建text的邮件体

BodyPart plainText=new MimeBodyPart();

plainText.setText(textContent);

mimeMultipart.addBodyPart(plainText);

//创建html的邮件体

BodyPart htmlText=new MimeBodyPart();

htmlText.setContent(htmlContent,"text/html");

mimeMultipart.addBodyPart(htmlText);

}

       这里,prepare方法先设置发件人和收件人，还有主题，注意在设置发件人和收件人地址，我们必须使用InternetAddres.parse()的方法从一个String里建立一个InternetAddress实例，这是MimeMessageHelper方法隐藏的细节之一，一般总是使用MimeMessageHelper来配置消息属性，甚至是直接封装消息的时候
       接下来，我们建立一个MimeMultipart实例，一个保存分段消息的封装类，我们指定MIME类型为Multipart/alternative，说明这里包含同一数据的可选格式，这个MimeMultipart实例被MimeMessage.setContent()方法指定为MimeMessage实例的正文
      然后，我们创建两个MimeBodyPart，一个针对纯文本，一个针对html,前者会设置格式为Text/plain,后者再调用setContext方法时候，加一个参数"text/html",作为结果，他们都被被加入MimeMessage里，其中添加的顺序最为重要，应该把最希望显示的消息格式最后添加
     这个代码结果是构造一个MimeMessage实例它顶层的Mime类型是multipart/alternative,包含两个消息，一个是text/plain,另一个是text/html

测试代码：

package ch15.SimpleChangeMail;

import java.io.File;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class SimpleChangeTest {

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

ApplicationContext context = new ClassPathXmlApplicationContext(

"ch15/SimpleChangeMail/applicationContext.xml");

MessagePreparator messagePreparator = (MessagePreparator) context.getBean("messagePreparator");

MessageSender messageSender=(MessageSender)context.getBean("messageSender");