在上一篇Spring電子郵件教學，硬編碼的所有電子郵件屬性和消息的方法體中的內容，這是不實際的，應予以避免。應該考慮在Spring bean 配置檔中定義電子郵件範本。
1.Spring的郵件發件人
Java類使用 Spring的MailSender介面發送電子郵件，並使用 String.Format 傳遞變數bean配置檔替換電子郵件中的 '%s'。
File : MailMail.java
package com.xuhuhu.common;
import org.springframework.mail.MailSender;
import org.springframework.mail.SimpleMailMessage;
public class MailMail
{
private MailSender mailSender;
private SimpleMailMessage simpleMailMessage;
public void setSimpleMailMessage(SimpleMailMessage simpleMailMessage) {
this.simpleMailMessage = simpleMailMessage;
}
public void setMailSender(MailSender mailSender) {
this.mailSender = mailSender;
}
public void sendMail(String dear, String content) {
SimpleMailMessage message = new SimpleMailMessage(simpleMailMessage);
message.setText(String.format(
simpleMailMessage.getText(), dear, content));
mailSender.send(message);
}
}
2. Bean的配置檔
定義電子郵件範本“customeMailMessage' 和郵件發件人資訊的bean配置檔。
File : Spring-Mail.xml
<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-2.5.xsd">
<bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
<property name="host" value="smtp.gmail.com" />
<property name="port" value="587" />
<property name="username" value="username" />
<property name="password" value="password" />
<property name="javaMailProperties">
<props>
<prop key="mail.smtp.auth">true</prop>
<prop key="mail.smtp.starttls.enable">true</prop>
</props>
</property>
</bean>
<bean id="mailMail" class="com.xuhuhu.common.MailMail">
<property name="mailSender" ref="mailSender" />
<property name="simpleMailMessage" ref="customeMailMessage" />
</bean>
<bean id="customeMailMessage"
class="org.springframework.mail.SimpleMailMessage">
<property name="from" value="from@no-spam.com" />
<property name="to" value="to@no-spam.com" />
<property name="subject" value="Testing Subject" />
<property name="text">
<value>
<![CDATA[
Dear %s,
Mail Content : %s
]]>
</value>
</property>
</bean>
</beans>
4. 運行它
package com.xuhuhu.common;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class App
{
public static void main( String[] args )
{
ApplicationContext context =
new ClassPathXmlApplicationContext("applicationContext.xml");
MailMail mm = (MailMail) context.getBean("mailMail");
mm.sendMail("zaixian", "This is text content");
}
}
輸出
Dear zaixian, Mail Content : This is text content