Question

我正在尝试编写Spring（我使用3.0）应用程序并使用Spring包含的Javamail。我希望将javamail属性（stmp服务器，端口，用户名，传递等）存储在数据库中以便于更新/更改。我已经看到了在applicationContext.xml or in a properties文件中设置Javamail属性的示例。

但是is there a way to use a database to store the email properties and retrieve them every time I need to send a e-mail?

我的ApplicationContex.xml

<bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
    <property name="defaultEncoding" value="UTF-8" />
    <property name="host" value="smtp.gmail.com" />
    <property name="port" value="465" />
    <property name="protocol" value="smtps" />
    <property name="username" value="test@gmail.com" />
    <property name="password" value="***********" />
    <property name="javaMailProperties">
        <props>
            <prop key="mail.smtps.auth">true</prop>
            <prop key="mail.smtps.starttls.enable">true</prop>
            <prop key="mail.smtps.debug">true</prop>
        </props>
    </property>
</bean>

感谢您的帮助。

Answer 1

当然，你可以。

1）第一种方式

<bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl"/>

在控制器中

@Autowired 
JavaMailSender mailSender


@PostConstruct
public void init(){
    // connect to database
    // obtain properties
    JavaMailSenderImpl ms = (JavaMailSenderImpl) mailSender;
    ms.set...
    ms.set...
    ms.set...
}

2）第二种方式

public class DatabaseBasedMailSender extends JavaMailSenderImpl{

    public DatabaseBasedMailSender(){
        // connect to database
        // obtain properties

        setHost(...)
        setProtocol(...)
        ...

    }


}

<bean id="mailSender" class="my.project.DatabaseBasedMailSender"/>

我确信有可能找到另一种方法来做到这一点。

Answer 2

一种方法是创建一个单例bean来初始化您所有与电子邮件相关的属性：

从数据库获取所有与电子邮件相关的属性，并将其设置为系统/环境属性

使用System.getProperty("propertyName")

按照下面的要求获取所有这些属性。

@Configuration
public class EmailConfig {

@Bean
public JavaMailSender getJavaMailSender() {

    JavaMailSenderImpl mailSender = new JavaMailSenderImpl();
    mailSender.setHost("");
    mailSender.setPort(Integer.valueOf("");
    mailSender.setDefaultEncoding("");
    mailSender.setUsername("");
    mailSender.setPassword("");

    Properties props = mailSender.getJavaMailProperties();
    props.put("spring.mail.protocol","");
    props.put("mail.smtps.starttls.enable","");
    props.put("mail.smtp.auth","");

    return mailSender;
   }
}

Answer 3

你也可以创建一个属性文件，从那里你可以获得所有的值，如主机，用户名，密码，我不认为存储在数据库中是个好主意，但如果你想要你可以使用..无论何时想要更改邮件设置，都可以进入属性文件并在那里更改，我创建了单独的util包用于发送邮件

public void sendMailWithAttachments(String to, String subject,
        String content, String[] attachFiles) {

    try {
        final String userName = com.sheel.property.Properties.userName;
        final String password = com.sheel.property.Properties.password;
        String from = com.sheel.property.Properties.mailFrom;
        Properties props = new Properties();
        props.put("mail.smtp.host",
                com.sheel.property.Properties.SMTP_HOST);
        props.put("mail.smtp.socketFactory.port",
                com.sheel.property.Properties.SMTP_PORT);
        props.put("mail.smtp.socketFactory.class",
                "javax.net.ssl.SSLSocketFactory");
        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.port",
                com.sheel.property.Properties.SMTP_PORT);

        Session session = Session.getInstance(props,
                new javax.mail.Authenticator() {
                    protected PasswordAuthentication 

                    getPasswordAuthentication() {
        return new    PasswordAuthentication(userName,
                                password);
                    }
                });

        Message msg = new MimeMessage(session);

        msg.setFrom(new InternetAddress(from));
        msg.setRecipients(Message.RecipientType.TO,
                InternetAddress.parse(to));
        msg.setSubject(subject);
        msg.setSentDate(new Date());

        MimeBodyPart messageBodyPart = new MimeBodyPart();
        messageBodyPart.setContent(content, "text/html");

        Multipart multipart = new MimeMultipart();
        multipart.addBodyPart(messageBodyPart);

        if (attachFiles != null && attachFiles.length > 0) {
            for (String filePath : attachFiles) {
                MimeBodyPart attachPart = new MimeBodyPart();

                try {
                    attachPart.attachFile(filePath);
                } catch (IOException ex) {
                    ex.printStackTrace();
                    throw ex;
                }

                multipart.addBodyPart(attachPart);
            }
        }

        msg.setContent(multipart);

        Transport.send(msg);

        System.out.println("Mail sent");
    } catch (Exception ex) {
        ex.printStackTrace();
    }

}

这是属性文件

public interface Properties {
String SMTP_HOST = "smtpout.secureserver.net";
String SMTP_PORT = "465";
String incoming_server_host = "pop.secureserver.net";
String incoming_server_port = "995";
String userName = "test@gmail.com";
String password = "password";
}

数据库中的Spring Javamail属性

3 个答案: