Spring Boot Email 邮件发送：【从零开始学Spring Boot】-7.Spring Boot Email邮件发送
1.Email 自动装配
JavaMailSender 仅有一个实现 JavaMailSenderImpl
在 Mail 的自动装配类 MailSenderAutoConfiguration 中有如下定义
@Configuration(proxyBeanMethods = false)
@ConditionalOnClass({ MimeMessage.class, MimeType.class, MailSender.class })
@ConditionalOnMissingBean(MailSender.class)
@Conditional(MailSenderCondition.class)
@EnableConfigurationProperties(MailProperties.class)
@Import({ MailSenderJndiConfiguration.class, MailSenderPropertiesConfiguration.class })
public class MailSenderAutoConfiguration {
static class MailSenderCondition extends AnyNestedCondition {
MailSenderCondition() {
super(ConfigurationPhase.PARSE_CONFIGURATION);
}
@ConditionalOnProperty(prefix = "spring.mail", name = "host")
static class HostProperty {
}
@ConditionalOnProperty(prefix = "spring.mail", name = "jndi-name")
static class JndiNameProperty {
}
}
}MailSenderAutoConfiguration 通过 @Import 对 MailSenderJndiConfiguration 和 MailSenderPropertiesConfiguration 进行导入，这两个类中声明了 JavaMailSenderImpl 对象
@Configuration(proxyBeanMethods = false)
@ConditionalOnClass(Session.class)
@ConditionalOnProperty(prefix = "spring.mail", name = "jndi-name")
@ConditionalOnJndi
class MailSenderJndiConfiguration {
private final MailProperties properties;
MailSenderJndiConfiguration(MailProperties properties) {
this.properties = properties;
}
@Bean
JavaMailSenderImpl mailSender(Session session) {
JavaMailSenderImpl sender = new JavaMailSenderImpl();
sender.setDefaultEncoding(this.properties.getDefaultEncoding().name());
sender.setSession(session);
return sender;
}
@Bean
@ConditionalOnMissingBean
Session session() {
String jndiName = this.properties.getJndiName();
try {
return JndiLocatorDelegate.createDefaultResourceRefLocator().lookup(jndiName, Session.class);
}
catch (NamingException ex) {
throw new IllegalStateException(String.format("Unable to find Session in JNDI location %s", jndiName), ex);
}
}
}
