如何让javamailsender在错误的邮件密码上加载应用程序上下文失败?

我在一个sring引导应用程序中使用javamilsender,例如,如果一个属性(比如密码)是错误的,从而阻止了在邮件网关中的登录,那么它就不能自动连接bean,应用程序上下文也无法加载。

Spring邮件属性:

spring.mail.host=smtp.gmail.com
spring.mail.port=465
spring.mail.protocol=smtp
spring.mail.username=xxx@gmail.com
spring.mail.password=xxx
spring.mail.from=xxx@gmail.com

属性由属性读取器加载:

public abstract class AbstractUserProperties implements ApplicationProperties {

    @Value("${" + PropertyNames.CONFIG_AUTH_TOKEN_PRIVATE_KEY + "}")
    private String authenticationTokenPrivateKey;

    @Value("${" + PropertyNames.CONFIG_MAIL_HOST + "}")
    private String host;

    @Value("${" + PropertyNames.CONFIG_MAIL_PORT + "}")
    private String port;

    @Value("${" + PropertyNames.CONFIG_MAIL_PROTOCOL + "}")
    private String protocol;

    @Value("${" + PropertyNames.CONFIG_MAIL_USERNAME + "}")
    private String username;

    @Value("${" + PropertyNames.CONFIG_MAIL_PASSWORD + "}")
    private String password;

    @Value("${" + PropertyNames.CONFIG_MAIL_FROM + "}")
    private String mailFrom;

    @Value("${" + PropertyNames.CONFIG_MAIL_TEST_CONNECTION + "}")
    private boolean mailTestConnection;

    @Value("${" + PropertyNames.CONFIG_MAILING_ENABLED + "}")
    private boolean mailingEnabled;

    public String getAuthenticationTokenPrivateKey() {
        return authenticationTokenPrivateKey;
    }

    @Override
    public String getHost() {
        return host;
    }

    @Override
    public String getPort() {
        return port;
    }

    @Override
    public String getProtocol() {
        return protocol;
    }

    @Override
    public String getUsername() {
        return username;
    }

    @Override
    public String getPassword() {
        return password;
    }

    @Override
    public String getMailFrom() {
        return mailFrom;
    }

    @Override
    public boolean getMailTestConnection() {
        return mailTestConnection;
    }

    @Override
    public boolean getMailingEnabled() {
        return mailingEnabled;
    }

}

如何使错误的邮件密码不妨碍应用程序启动?

依赖项:

<version>2.0.3.RELEASE</version>
<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-mail</artifactId>
</dependency>

我在 Spring Boot 2.0.3 .

以下是应用程序的邮件配置:

@Configuration
public class MailConfig {

    @Autowired
    private ApplicationProperties applicationProperties;

    @Bean
    public JavaMailSender javaMailSender() {
        String host = applicationProperties.getHost();
        String port = applicationProperties.getPort();
        String protocol = applicationProperties.getProtocol();
        String username = applicationProperties.getUsername();
        String password = applicationProperties.getPassword();
        if (!password.isEmpty() && !username.isEmpty() && !protocol.isEmpty() && !port.isEmpty() && !host.isEmpty()) {
            JavaMailSenderImpl javaMailSender = new JavaMailSenderImpl();
            javaMailSender.setHost(host);
            javaMailSender.setPort(Integer.parseInt(port));
            javaMailSender.setProtocol(protocol);
            javaMailSender.setUsername(username);
            javaMailSender.setPassword(password);
            javaMailSender.setJavaMailProperties(getMailProperties());
            return javaMailSender;
        } else {
            return null;
        }
    }

    @Bean
    public SimpleMailMessage simpleMailMessage() {
        SimpleMailMessage simpleMailMessage = new SimpleMailMessage();
        simpleMailMessage.setFrom(applicationProperties.getMailFrom());
        return simpleMailMessage;
    }

    private Properties getMailProperties() {
        Properties properties = new Properties();
        properties.setProperty("mail.smtp.auth", "true");
        properties.setProperty("mail.smtp.starttls.enable", "false");
        properties.setProperty("mail.smtp.quitwait", "false");
        properties.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
        properties.setProperty("mail.smtp.socketFactory.fallback", "false");
        properties.setProperty("mail.debug", "true");
        return properties;
    }

}

更新: 我已经把 spring.mail.test-connection=false 中的属性 application.properties 文件和控制台日志显示它已被复制:

[INFO] Copying 1 resource
[DEBUG] Copying file application.properties

我也移除了 MailConfig 类,以便使用默认情况下由Spring提供的。 但是,错误消息仍然相同。 作为附带说明,我想知道如何在自己的bean配置中使用该属性,而不必使用默认的Springbean。

更新: 我可以加上 mail.test-connection 配置bean中的属性,如:

private Properties getMailProperties() {
    Properties properties = new Properties();
    properties.setProperty("mail.smtp.auth", "true");
    properties.setProperty("mail.smtp.starttls.enable", "false");
    properties.setProperty("mail.smtp.quitwait", "false");
    properties.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
    properties.setProperty("mail.smtp.socketFactory.fallback", "false");
    properties.setProperty("mail.debug", "true");
    properties.setProperty("mail.test-connection", String.valueOf(applicationProperties.getMailTestConnection()));
    return properties;
}

@Bean
public JavaMailSender javaMailSender() {
    String host = applicationProperties.getHost();
    String port = applicationProperties.getPort();
    String protocol = applicationProperties.getProtocol();
    String username = applicationProperties.getUsername();
    String password = applicationProperties.getPassword();
    JavaMailSenderImpl javaMailSender = new JavaMailSenderImpl();
    javaMailSender.setHost(host);
    javaMailSender.setPort(Integer.parseInt(port));
    javaMailSender.setProtocol(protocol);
    javaMailSender.setUsername(username);
    javaMailSender.setPassword(password);
    javaMailSender.setJavaMailProperties(getMailProperties());
    return javaMailSender;
}

现在,即使没有提供密码,没有检查连接,应用程序上下文也可以正常加载。