问题可能是因为在服务器上缺少AWS配置文件。可以在服务器上创建~/.aws/credentials文件，并添加AWS密钥和访问密钥。

[default]
aws_access_key_id = ACCESS_KEY
aws_secret_access_key = SECRET_KEY

在代码中添加以下代码来读取credentials文件：

try {
    //设置系统变量指示将在本地FileSystemCredentialsProvider中查找默认凭据配置文件'credentials”。
    System.setProperty("aws.sharedCredentialsFile", "/home/username/.aws/credentials");
    //或者用以下代码来指定凭据文件的位置：
    //ProfilesConfigFile configFile = new ProfilesConfigFile("/home/username/.aws/credentials");
    //然后指定ProfileName即可。
    //builder.setCredentials(new ProfileCredentialsProvider(configFile, "default"));

    //使用AWS传输客户端来创建一个新的Amazon SES客户端
    AmazonSimpleEmailService client = AmazonSimpleEmailServiceClientBuilder.standard().build();

    // 创建发送电子邮件的请求
    SendEmailRequest request = new SendEmailRequest()
            .withDestination(
                    new Destination().withToAddresses("recipient@example.com"))
            .withMessage(new Message()
                    .withBody(new Body()
                            .withHtml(new Content()
                                    .withCharset("UTF-8").withData("
HTML BODY
"))
                            .withText(new Content()
                                    .withCharset("UTF-8").withData("TEXT BODY")))
                    .withSubject(new Content()
                            .withCharset("UTF-8").withData("Test email")))
            .withSource("sender@example.com");

    // 发送电子邮件
    SendEmailResult response = client.sendEmail(request);
    System.out.println("Email sent!");
} catch (AmazonServiceException e) {
    // 抛出AmazonServiceException异常时，Amazon SES未能调用成功。
    System.out.println("The email was not sent.");
    System.out.println("Error message: " + e.getMessage());
} catch (Exception e) {
    // 抛出异常时
    System.out.println("The email was not sent.");
    System.out.println("Error message: " + e.getMessage());
}

在以上代码中，ACCESS_KEY和SECRET_KEY是AWS的访问凭据。/home/username/.aws/credentials 是用户AWS凭证的配置文件位置。recipient@example.com和sender@example.com是收件人和发件人的电子邮件地址。其他内容