Spring集成Amazon SES时出现ClassNotFoundException异常求助

我按照教程搭建Spring Boot集成Amazon SES邮件服务，构建时持续抛出java.lang.ClassNotFoundException: io.awspring.cloud.jdbc.config.annotation.AmazonRdsInstanceConfiguration异常，以下是我的代码配置及报错信息，求解决。

配置文件（AmazonSESConfig.java） #

import com.amazonaws.auth.AWSStaticCredentialsProvider;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.services.simpleemail.AmazonSimpleEmailService;
import com.amazonaws.services.simpleemail.AmazonSimpleEmailServiceClientBuilder;
import io.awspring.cloud.ses.SimpleEmailServiceMailSender;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.mail.MailSender;

@Configuration
public class AmazonSESConfig {

    @Value("${amazon.aws.accessKey}")
    private String accessKey;
    @Value("${amazon.aws.secretKey}")
    private String secretKey;

    @Value("${amazon.aws.region}")
    private String region;

    @Bean
    public AmazonSimpleEmailService amazonSimpleEmailService() {
        BasicAWSCredentials credentials = new BasicAWSCredentials(accessKey, secretKey);
        return AmazonSimpleEmailServiceClientBuilder
                .standard()
                .withCredentials(new AWSStaticCredentialsProvider(credentials))
                .withRegion(region)
                .build();

    }

    @Bean
    public MailSender mailSender(AmazonSimpleEmailService amazonSimpleEmailService) {
        return new SimpleEmailServiceMailSender(amazonSimpleEmailService);
    }
}

属性文件（application.properties） #

amazon.aws.accessKey=ACCESS_KEY
amazon.aws.secretKey=SECRET_KEY
amazon.aws.region=ca-central-1

服务类（CorrespondenceService.java） #

@Service
public class CorrespondenceService {

    @Autowired
    private MailSender mailSender;

    public void sendMail(){
    
        SimpleMailMessage simpleMailMessage = new SimpleMailMessage();
        simpleMailMessage.setFrom("testFromEmail@test.com");
        simpleMailMessage.setTo("testToEmail@test.com");
        simpleMailMessage.setSubject("Test");
        simpleMailMessage.setText("This email is a test");

        mailSender.send(simpleMailMessage);


    }

}

主类（EmailApplication.java） #

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class EmailApplication {

    public static void main(String[] args) {
        SpringApplication.run(EmailApplication.class, args);
    }

}

报错堆栈 #

java.lang.IllegalArgumentException: Could not find class [io.awspring.cloud.jdbc.config.annotation.AmazonRdsInstanceConfiguration]
        at org.springframework.util.ClassUtils.resolveClassName(ClassUtils.java:334) ~[spring-core-5.3.19.jar:5.3.19]
        at org.springframework.core.annotation.TypeMappedAnnotation.adapt(TypeMappedAnnotation.java:446) ~[spring-core-5.3.19.jar:5.3.19]
        at org.springframework.core.annotation.TypeMappedAnnotation.getValue(TypeMappedAnnotation.java:369) ~[spring-core-5.3.19.jar:5.3.19]
        at org.springframework.core.annotation.TypeMappedAnnotation.asMap(TypeMappedAnnotation.java:284) ~[spring-core-5.3.19.jar:5.3.19]
        at org.springframework.core.annotation.AbstractMergedAnnotation.asAnnotationAttributes(AbstractMergedAnnotation.java:193) ~[spring-core-5.3.19.jar:5.3.19]
        at org.springframework.core.type.AnnotatedTypeMetadata.getAnnotationAttributes(AnnotatedTypeMetadata.java:106) ~[spring-core-5.3.19.jar:5.3.19]
        at org.springframework.core.type.AnnotatedTypeMetadata.getAnnotationAttributes(AnnotatedTypeMetadata.java:81) ~[spring-core-5.3.19.jar:5.3.19]
        at org.springframework.context.annotation.AnnotationConfigUtils.attributesFor(AnnotationConfigUtils.java:285) ~[spring-context-5.3.19.jar:5.3.19]
        at org.springframework.context.annotation.AnnotationBeanNameGenerator.determineBeanNameFromAnnotation(AnnotationBeanNameGenerator.java:103) ~[spring-context-5.3.19.jar:5.3.19]
        at org.springframework.context.annotation.AnnotationBeanNameGenerator.generateBeanName(AnnotationBeanNameGenerator.java:82) ~[spring-context-5.3.19.jar:5.3.19]
        at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.registerBeanDefinitionForImportedConfigurationClass(ConfigurationClassBeanDefinitionReader.java:169) ~[spring-context-5.3.19.jar:5.3.19]
        at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:150) ~[spring-context-5.3.19.jar:5.3.19]
        at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:129) ~[spring-context-5.3.19.jar:5.3.19]
        at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:343) ~[spring-context-5.3.19.jar:5.3.19]
        at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:247) ~[spring-context-5.3.19.jar:5.3.19]
        at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:311) ~[spring-context-5.3.19.jar:5.3.19]
        at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:112) ~[spring-context-5.3.19.jar:5.3.19]
        at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:746) ~[spring-context-5.3.19.jar:5.3.19]
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:564) ~[spring-context-5.3.19.jar:5.3.19]
        at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.6.7.jar:2.6.7]
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:740) ~[spring-boot-2.6.7.jar:2.6.7]
        at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:415) ~[spring-boot-2.6.7.jar:2.6.7]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) ~[spring-boot-2.6.7.jar:2.6.7]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312) ~[spring-boot-2.6.7.jar:2.6.7]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) ~[spring-boot-2.6.7.jar:2.6.7]
        at *MY APPLICATION PATH*(MyApplication.java:10) ~[classes/:na]
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104) ~[na:na]
        at java.base/java.lang.reflect.Method.invoke(Method.java:578) ~[na:na]
        at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) ~[spring-boot-devtools-2.6.7.jar:2.6.7]
Caused by: java.lang.ClassNotFoundException: io.awspring.cloud.jdbc.config.annotation.AmazonRdsInstanceConfiguration
        at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641) ~[na:na]
        at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188) ~[na:na]
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521) ~[na:na]
        at java.base/java.lang.Class.forName0(Native Method) ~[na:na]
        at java.base/java.lang.Class.forName(Class.java:495) ~[na:na]
        at java.base/java.lang.Class.forName(Class.java:474) ~[na:na]
        at org.springframework.boot.devtools.restart.classloader.RestartClassLoader.loadClass(RestartClassLoader.java:145) ~[spring-boot-devtools-2.6.7.jar:2.6.7]
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521) ~[na:na]
        at java.base/java.lang.Class.forName0(Native Method) ~[na:na]
        at java.base/java.lang.Class.forName(Class.java:495) ~[na:na]
        at java.base/java.lang.Class.forName(Class.java:474) ~[na:na]
        at org.springframework.util.ClassUtils.forName(ClassUtils.java:284) ~[spring-core-5.3.19.jar:5.3.19]
        at org.springframework.util.ClassUtils.resolveClassName(ClassUtils.java:324) ~[spring-core-5.3.19.jar:5.3.19]
        ... 28 common frames omitted

这个错误源于Spring尝试加载RDS相关配置类，但你的项目只用到SES，缺少对应依赖或依赖版本不兼容，可通过以下方式解决：

1. 排除RDS自动配置 #

修改主类的@SpringBootApplication注解，排除不必要的RDS自动配置类，阻止Spring加载不存在的类：

@SpringBootApplication(exclude = {AmazonRdsInstanceAutoConfiguration.class})

2. 替换为专用SES依赖 #

AWS Spring Cloud已迁移到awspring组织，使用最新的专用SES依赖，避免冗余的RDS模块：

• Maven：

<dependency>
    <groupId>io.awspring.cloud</groupId>
    <artifactId>awspring-cloud-starter-ses</artifactId>
    <version>3.0.0</version> <!-- 版本需匹配Spring Boot，例如2.6.x对应3.0.x -->
</dependency>

• Gradle：

implementation 'io.awspring.cloud:awspring-cloud-starter-ses:3.0.0'

同时移除旧的spring-cloud-starter-aws依赖，避免版本冲突。

3. 排除传递依赖中的RDS模块 #

如果必须保留旧版spring-cloud-starter-aws，手动排除RDS相关传递依赖：
Maven示例：

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-aws</artifactId>
    <version>2.2.6.RELEASE</version>
    <exclusions>
        <exclusion>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-aws-jdbc</artifactId>
        </exclusion>
    </exclusions>
</dependency>

内容的提问来源于stack exchange，提问作者Abe