Question

如何创建直接频道，imap频道适配器并传递用户帐户信息，以便程序开始寻找新邮件。

我已经使用xml配置实现了邮件接收器。

<?xml version="1.0" encoding="UTF-8"?>
<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.xsd
    http://www.springframework.org/schema/integration http://www.springframework.org/schema/integration/spring-integration.xsd
    http://www.springframework.org/schema/integration/mail http://www.springframework.org/schema/integration/mail/spring-integration-mail.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd"
   xmlns:int="http://www.springframework.org/schema/integration"
   xmlns:int-mail="http://www.springframework.org/schema/integration/mail"
   xmlns:util="http://www.springframework.org/schema/util">

<int:channel id="emails"/>

<util:properties id="javaMailProperties">
    <prop key="mail.imap.socketFactory.class">javax.net.ssl.SSLSocketFactory</prop>
    <prop key="mail.imap.socketFactory.fallback">false</prop>
    <prop key="mail.store.protocol">imaps</prop>
    <prop key="mail.debug">true</prop>
</util:properties>

<int-mail:imap-idle-channel-adapter id="mailAdapter"
                              store-uri="imaps://login:pass@imap-server:993/INBOX"
                              java-mail-properties="javaMailProperties"
                              channel="emails"
                              should-delete-messages="false"
                              should-mark-messages-as-read="true">
</int-mail:imap-idle-channel-adapter>

下面是使用xml文件的Java文件。

public class EmailIntegrationTesting {

private static Logger logger = LoggerFactory.getLogger(EmailIntegrationTesting.class);

public static void main(String[] args) throws Exception {
    ApplicationContext ac = new ClassPathXmlApplicationContext("gmail-imap.xml");

    DirectChannel inputChannel = ac.getBean("receiveChannel", DirectChannel.class);
    inputChannel.subscribe(new MessageHandler() {
        @Override
        public void handleMessage(Message<?> message) throws MessagingException {


            MailToStringTransformer m2s = new MailToStringTransformer();
            m2s.setCharset("utf-8");
            System.out.println("Message: " + m2s.transform(message));

            System.out.println("Message: " + message.getPayload());
            Object payload = message.getPayload();

            if (payload instanceof MimeMessage) {
                try {

                    javax.mail.Message mailMessage = (javax.mail.Message) payload;
                    System.out.println(mailMessage.getSubject());
                    System.out.println(getTextFromMessage(mailMessage));

                    Address[] receipts = mailMessage.getAllRecipients();
                    System.out.println("RECEIPIENTS MAIL ID");
                    if (receipts != null && receipts.length > 0) {
                        for (int i = 0; i < receipts.length; i++) {
                            System.out.println(((InternetAddress) receipts[i]).getAddress());
                        }
                    }

                    System.out.println("FROM MAIL ID");
                    Address[] froms = mailMessage.getFrom();
                    String email = froms == null ? null
                            : ((InternetAddress) froms[0]).getAddress();
                    System.out.println(email);

                } catch (Exception e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

            }
        }
    });
}

private static String getTextFromMessage(javax.mail.Message message) throws Exception {
    String result = "";
    if (message.isMimeType("text/plain")) {
        result = message.getContent().toString();
    } else if (message.isMimeType("multipart/*")) {
        MimeMultipart mimeMultipart = (MimeMultipart) message.getContent();
        result = getTextFromMimeMultipart(mimeMultipart);
    }
    return result;
}

private static String getTextFromMimeMultipart(MimeMultipart mimeMultipart) throws Exception {
    String result = "";
    int count = mimeMultipart.getCount();
    for (int i = 0; i < count; i++) {
        BodyPart bodyPart = mimeMultipart.getBodyPart(i);
        if (bodyPart.isMimeType("text/plain")) {
            result = result + "\n" + bodyPart.getContent();
            break; // without break same text appears twice in my tests
        } else if (bodyPart.isMimeType("text/html")) {
            String html = (String) bodyPart.getContent();
            // result = result + "\n" + org.jsoup.Jsoup.parse(html).text();
        } else if (bodyPart.getContent() instanceof MimeMultipart) {
            result = result + getTextFromMimeMultipart((MimeMultipart) bodyPart.getContent());
        }
    }
    return result;
}

}

我可以使用上述代码成功接收邮件。

我也可以将xml转换为java配置。下面是代码。

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.integration.mail.ImapIdleChannelAdapter;
import org.springframework.integration.mail.ImapMailReceiver;
import java.util.Properties;

@Configuration
class ImapConfiguration {

private Properties javaMailProperties() {
    Properties javaMailProperties = new Properties();

    javaMailProperties.setProperty("mail.imap.socketFactory.class","javax.net.ssl.SSLSocketFactory");
    javaMailProperties.setProperty("mail.imap.socketFactory.fallback","false");
    javaMailProperties.setProperty("mail.store.protocol","imaps");
    javaMailProperties.setProperty("mail.debug","true");

    return javaMailProperties;
}

@Bean
ImapIdleChannelAdapter mailAdapter() {
    ImapMailReceiver mailReceiver = new ImapMailReceiver("imaps://login:pass@imap-server:993/INBOX");

    mailReceiver.setJavaMailProperties(javaMailProperties());
    mailReceiver.setShouldDeleteMessages(false);
    mailReceiver.setShouldMarkMessagesAsRead(true);

    return new ImapIdleChannelAdapter(mailReceiver);
}

@Bean
public MessageChannel emails() {
 return new DirectChannel();
}

}

现在，我的观点是我想动态配置上面的代码。

USECASE 当用户填写imap服务器详细信息时，它应该开始查找传入的电子邮件。意味着我不想在服务器启动时创建bean。

Answer 1

请参阅my answer to this question和its follow-up。

您还可以使用Java DSL动态注册流...

@Autowired
private IntegrationFlowContext flowContext;

...

    IntegrationFlow flow = IntegrationFlows.from(Mail.imapIdleAdapter(...)
                            .handle(...)
                            ...
                            .get();
    IntegrationFlowRegistration flowRegistration =
                this.flowContext.registration(flow)
                        .register();

修改

添加了示例启动应用程序

@SpringBootApplication public class So42297006Application { public static void main(String[] args) throws Exception { ConfigurableApplicationContext context = SpringApplication.run(So42297006Application.class, args); context.getBean(So42297006Application.class).runDemo(); context.close(); System.exit(0); } public void runDemo() throws Exception { Scanner scanner = new Scanner(System.in); System.out.println("Enter username"); String user = scanner.next(); System.out.println("Enter pw"); String pw = scanner.next(); scanner.close(); startMail(user, pw); Thread.sleep(10_000); } @Autowired private IntegrationFlowContext flowContext; public void startMail(String user, String pw) { IntegrationFlow flow = IntegrationFlows .from(Mail.imapIdleAdapter(imapUrl(user, pw)) .javaMailProperties(p -> p.put("mail.debug", "false")) .userFlag("testSIUserFlag") // needed by the SI test server - not needed if server supports /SEEN .headerMapper(new DefaultMailHeaderMapper())) .handle(System.out::println) .get(); this.flowContext.registration(flow).register(); } private String imapUrl(String user, String pw) { return "imap://" + user + ":" + pw + "@localhost:" + imapServer().getPort() + "/INBOX"; } @Bean public TestMailServer.ImapServer imapServer() { return TestMailServer.imap(0); } }

Maven deps：

<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-integration</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-mail</artifactId> </dependency> <dependency> <groupId>org.springframework.integration</groupId> <artifactId>spring-integration-mail</artifactId> </dependency> <dependency> <groupId>org.springframework.integration</groupId> <artifactId>spring-integration-test</artifactId> </dependency> <dependency> <groupId>org.springframework.integration</groupId> <artifactId>spring-integration-java-dsl</artifactId> </dependency>

如何使用spring boot动态创建imap接收器适配器？

1 个答案: