春天：从Gmail发送电子邮件 [英] Spring: Send email from Gmail

问题描述

我正在关注发送的此链接电子邮件（Gmail smtp）
我的问题是，为什么我应该在bean中对发件人和接收器进行硬编码？

I am following This link for sending email (Gmail smtp) My problem is that why should I hardcode sender and receiver in the bean?

<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.mkyong.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="[e-mail]" />
       <property name="to" value="[e-mail]" />
       <property name="subject" value="Testing Subject" />
       <property name="text">
       <value>
        <![CDATA[
        Dear %s,
        Mail Content : %s
          ]]>
        </value>
           </property>
   </bean>

推荐答案

您可以避免对电子邮件属性进行硬编码，电子邮件属性在外部属性文件中，例如 email.properties 。如果您在配置文件中启用上下文命名空间，Spring将加载属性文件，并允许文件中的属性通过表达式语言使用。

You can avoid hard coding the email properties by placing the email properties in an external properties file, say email.properties. If you enable the context namespace within your configuration file Spring will load the properties file and allow properties within the file to be used via the expression language.

Email.properties

email.host=smtp.gmail.com
email.port=587
email.username=username
email.password=password

配置文件

<!-- Spring Loads the Properties File, which can be used for resolution of EL Expressions -->
<context:property-placeholder location="classpath:META-INF/db/db.properties"/>

<bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
   <property name="host" value="${email.host}" />
   <property name="port" value="${email.port}" />
   <property name="username" value="${email.username}" />
   <property name="password" value="${email.password}" />

    <property name="javaMailProperties">
    <props>
        <prop key="mail.smtp.auth">true</prop>
        <prop key="mail.smtp.starttls.enable">true</prop>
        </props>
     </property>
 </bean>

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