Spring 整合javamail 用 gmail 发送邮件

      Spring整合javamail成功之后，把大量的代码配置到spring的配置文件里了，从而降低了Javamail对邮箱、端口、协议、主题、内容…… 的耦合。在客户端上只需要调用一行代码就可以发送邮件了。

    首先不需要往项目的lib里导入jar，但是需要在tomcat的lib里导入3个jar文件activation.jar ，jspsmartupload.jar，mail.jar 导入这3个jar文件，这样tomcat就不会报错了。

 SendManagerService .java

package  com.cgt.itspiderman.service.email;

public   interface  SendManagerService {
     public   void  sendMail(String email); 
}

  定义一个发送邮件的接口.


SendManagerServiceImp.java

package  com.cgt.itspiderman.service.email;

import  javax.mail.Message;
import  javax.mail.internet.InternetAddress;
import  javax.mail.internet.MimeMessage;

import  org.springframework.mail.SimpleMailMessage;
import  org.springframework.mail.javamail.JavaMailSender;
import  org.springframework.mail.javamail.MimeMessagePreparator;

public   class SendManagerServiceImp implements  SendManagerService {

     private  JavaMailSender mailSender;
    
     private  SimpleMailMessage message;
        
     public   void  sendMail( final  String email) {
         //  TODO Auto-generated method stub
        
        MimeMessagePreparator preparator  =   new  MimeMessagePreparator()
        {
             public   void  prepare(MimeMessage mimeMessage)  throws  Exception {
                
                mimeMessage.setRecipient(Message.RecipientType.TO,  new  InternetAddress(email));
                mimeMessage.setFrom( new  InternetAddress(message.getFrom()));
                mimeMessage.setSubject(message.getSubject(), " gbk " );
                mimeMessage.setText(message.getText(), " gbk " );
            }
        };
        mailSender.send(preparator);
    
    }
    
     public  JavaMailSender getMailSender() {
         return  mailSender;
    }

     public   void  setMailSender(JavaMailSender mailSender) {
         this .mailSender  =  mailSender;
    }

     public  SimpleMailMessage getMessage() {
         return  message;
    }

     public   void  setMessage(SimpleMailMessage message) {
         this .message  =  message;
    }

}

发送邮件的实现类.

 然后在WEB-INF下面创建一个文件messages.properties    以后修改配置信息直接在这里修改就可以了。

host = smtp.gmail.com
username = [email protected]
password =xxxxxx
port = 465
mail.smtp.auth = true
mail.smtp.timeout = 25000
mail.smtp.starttls.enable = true
mail.smtp.socketFactory. class = javax.net.ssl.SSLSocketFactory
mail.smtp.socketFactory.fallback = false
from = [email protected]
subject = \u6807\u9898
text = \u5185\u5BB9\u554A

applicationContext.xml

  .......................

< bean id = " propertyConfigurer "   class = " org.springframework.beans.factory.config.PropertyPlaceholderConfigurer " >
       < property name = " locations " >
         < list >
            < value > WEB - INF / mail.properties </ value >
         </ list >  
       </ property >  
     </ bean >

     <!--  gmail 发送邮箱的配置文件  -->
        < bean id = " mailSender "   class = " org.springframework.mail.javamail.JavaMailSenderImpl " >
            < property name = " host " >
                < value > ${host} </ value >
            </ property >        
            < property name = " username " >
                < value > ${username} </ value >
            </ property >
            < property name = " password " >
                < value > ${password} </ value >
            </ property >
            < property name = " port " >
                < value > ${port} </ value >
            </ property >
            < property name = " javaMailProperties " >
                < props >
                    < prop key = " mail.smtp.auth " > ${mail.smtp.auth} </ prop >
                    < prop key = " mail.smtp.timeout " > ${mail.smtp.timeout} </ prop >
                    < prop key = " mail.smtp.starttls.enable " > ${mail.smtp.starttls.enable} </ prop >
                    < prop key = " mail.smtp.socketFactory.class " > ${mail.smtp.socketFactory. class } </ prop >
                    < prop key = " mail.smtp.socketFactory.fallback " > ${mail.smtp.socketFactory.fallback} </ prop >  
                </ props >
            </ property >
        </ bean >
        < bean id = " mailMessage "   class = " org.springframework.mail.SimpleMailMessage " >
            < property name = " from " >
                < value > ${from} </ value >
            </ property >
            < property name = " subject " >
                < value > ${subject} </ value >
            </ property >
            < property name = " text " >
                < value > ${text} </ value >
            </ property >
        </ bean >
        < bean id = " sendmail "   class = " com.cgt.itspiderman.service.email.SendManagerServiceImp " >
            < property name = " mailSender "  ref = " mailSender " ></ property >
            < property name = " message "  ref = " mailMessage " ></ property >
        </ bean >
        <!--  end  -->  

............................

public   static   void  main(String[] args) {
        
        ApplicationContext context =   null ;
        context  =   new  ClassPathXmlApplicationContext( " applicationContext.xml " );
        SendManagerService sms =     (SendManagerService)context.getBean( " sendmail " );
        sms.sendMail( " [email protected] " );
    }

 如果是在struts2里使用的话需要在Action里加上private SendManagerService sendemail;（加上get和set），然后在spring里配置这个Action的时候加上<property name="sendemail" ref="sendmail"></property>
然后在Action里调用下面这一行代码就可以发送了。
sendemail.sendMail("[email protected]");
  写到这里大家会问，如果需要动态的修改这个邮件的内容呢？方法很简单
     

  WebApplicationContext context = WebApplicationContextUtils.getRequiredWebApplicationContext(ServletActionContext.getServletContext());
        ((SimpleMailMessage) context.getBean( " mailMessage " )).setText( " 我现在修改了邮件的内容 呵呵呵 " );