利用 spring+freemarker 发送邮件

最近公司要用到给注册会员发送邮件的功能，这里采用spring+freemarker模板来发送邮件，其中模板可以自定义，欲了解freemarker请看我写的利用freemarker 静态化网页，里面介绍的很详细和怎么使用。

在做本次试验之前需要spring相关的jar和freemarker.jar

①定义发送邮件的模板

demo.ftl

 <!--这里可以写html代码，传递过来的参数可以用${}来接收 ，很是方便-->

 <a href="http://www.xxx.com">你好${username}</a>

②发送邮件java类

 package com.woaika.loan.utils;

 import java.util.Map;

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

 import org.springframework.mail.MailException;
 import org.springframework.mail.javamail.JavaMailSender;
 import org.springframework.mail.javamail.MimeMessageHelper;
 import org.springframework.ui.freemarker.FreeMarkerTemplateUtils;
 import org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer;

 import freemarker.template.Template;

 /**
  * 发送邮件 可以自己编写html模板
  * @author ajun
  * @email [email protected]
  * @blog http://blog.csdn.net/ajun_studio
  * 2011-12-6 下午04:49:01
  */
 public class TemplateEmail {

     private JavaMailSender sender;
     private FreeMarkerConfigurer freeMarkerConfigurer=null;//FreeMarker的技术类

     public void setFreeMarkerConfigurer(FreeMarkerConfigurer freeMarkerConfigurer) {
         this.freeMarkerConfigurer = freeMarkerConfigurer;
     }

     public void setSender(JavaMailSender sender) {
         this.sender = sender;
     }

     /**
      * 生成html模板字符串
      * @param root 存储动态数据的map
      * @return
      */
     private String getMailText(Map<String,Object> root,String templateName){
          String htmlText="";
             try {
                 //通过指定模板名获取FreeMarker模板实例
                 Template tpl=freeMarkerConfigurer.getConfiguration().getTemplate(templateName);
                 htmlText=FreeMarkerTemplateUtils.processTemplateIntoString(tpl,root);
             } catch (Exception e) {
                 e.printStackTrace();
             }
             return htmlText;
     }

     /**
      * 发送邮件
      * @param root 存储动态数据的map
      * @param toEmail 邮件地址
      * @param subject 邮件主题
      * @return
      */
     public boolean sendTemplateMail(Map<String,Object> root,String toEmail,String subject,String templateName){
         try {
             MimeMessage msg=sender.createMimeMessage();
             MimeMessageHelper helper=new MimeMessageHelper(msg,false,"utf-8");//由于是html邮件，不是mulitpart类型
             helper.setFrom("[email protected]");
             helper.setTo(toEmail);
             helper.setSubject(subject);
             String htmlText=getMailText(root,templateName);//使用模板生成html邮件内容
             helper.setText(htmlText, true);
             sender.send(msg);
             //System.out.println("成功发送模板邮件");
             return true;
         } catch (MailException e) {
            // System.out.println("失败发送模板邮件");
             e.printStackTrace();
             return false;
         } catch (MessagingException e) {
         //  System.out.println("失败发送模板邮件");
             e.printStackTrace();
             return false;
         }

     }
 }

③实例化相关freemarker类的配置文件,并交给spring来管理

applicationContext-sendMail.xml

 <beans xmlns="http://www.springframework.org/schema/beans"
  xmlns:context="http://www.springframework.org/schema/context"
  xmlns:p="http://www.springframework.org/schema/p"
  xmlns:mvc="http://www.springframework.org/schema/mvc"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:aop="http://www.springframework.org/schema/aop"
  xmlns:tx="http://www.springframework.org/schema/tx"
  xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/tx
       http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
       http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
       http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">

     <bean id="freeMarker" class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">
       <property name="templateLoaderPath" value="classpath:mailtemplates"/><!--指定模板文件目录-->
       <property name="freemarkerSettings"><!-- 设置FreeMarker环境属性-->
           <props>
               <prop key="template_update_delay">1800</prop><!--刷新模板的周期，单位为秒-->
               <prop key="default_encoding">UTF-8</prop><!--模板的编码格式 -->
               <prop key="locale">zh_CN</prop><!-- 本地化设置-->
           </props>
       </property>
     </bean>
     <bean id="templateEmail" class="com.woaika.loan.utils.TemplateEmail">
         <property name="sender" ref="mailsender"></property>
         <property name="freeMarkerConfigurer" ref="freeMarker"></property>
     </bean>

     <bean id="mailsender"
         class="org.springframework.mail.javamail.JavaMailSenderImpl">
         <property name="host">
             <value>mail.xx.com</value>
         </property>
         <property name="javaMailProperties">
             <props>
                 <prop key="mail.smtp.auth">true</prop>
                 <prop key="mail.smtp.timeout">25000</prop>
             </props>
         </property>
         <property name="username">
             <value>admin</value>
         </property>
         <property name="password">
             <value>qq22qq56we</value>
         </property>
     </bean>

 </beans>

④调用的时候，只需调用的类中注入TemplateEmail这个，然后调用相关的方法就可以了

 package com.woaika.loan.front.apply.action;

 import java.util.HashMap;
 import java.util.Map;

 import javax.annotation.Resource;

 import org.springframework.stereotype.Component;

 import com.woaika.loan.utils.TemplateEmail;

 /**
  * 发送邮件
  * @author ajun
  * @email [email protected]
  * @blog http://blog.csdn.net/ajun_studio
  * 2012-3-13 上午10:50:26
  */
 @Component("demoEmail")
 public class DemoEmail {

     private TemplateEmail templateEmail;

     @Resource(name="templateEmail")
     public void setTemplateEmail(TemplateEmail templateEmail) {
         this.templateEmail = templateEmail;
     }

     public void send(){
         Map<String,Object> root = new HashMap<String,Object>();
         root.put("username", "ajun");
         templateEmail.sendTemplateMail(root, "[email protected]","主题标题","demo.ftl");
     }



 }

ok ，赶快试试吧 很方便，而且spring可以定时刷新模板，这样就可以不重启服务了