尝试使用 Spring Boot API 发送电子邮件时出错：java.lang.ClassNotFoundException：javax.activation.DataContentHandler

问：

我正在尝试通过我的Spring Boot API发送电子邮件，我从maven导入了邮件启动器依赖项（我正在发送整个pom.xml以获取上下文）

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.1.3</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>projectColocarUK</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>projectColocarUK</name>
    <description>project for Colocar Courier UK</description>
    <properties>
        <java.version>17</java.version>
    </properties>
    <repositories>
        <repository>
            <id>central</id>
            <name>Maven Central Repository</name>
            <url>https://repo1.maven.org/maven2</url>
        </repository>
    </repositories>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <!-- https://mvnrepository.com/artifact/javax.validation/validation-api -->
        <dependency>
            <groupId>javax.validation</groupId>
            <artifactId>validation-api</artifactId>
            <version>2.0.1.Final</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>io.jsonwebtoken</groupId>
            <artifactId>jjwt-api</artifactId>
            <version>0.11.5</version>
        </dependency>
        <dependency>
            <groupId>io.jsonwebtoken</groupId>
            <artifactId>jjwt-jackson</artifactId>
            <version>0.11.5</version>
        </dependency>
        <dependency>
            <groupId>io.jsonwebtoken</groupId>
            <artifactId>jjwt-impl</artifactId>
            <version>0.11.5</version>
        </dependency> 
        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-mail</artifactId>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

然后我创建我的服务：

import jakarta.mail.MessagingException;
import jakarta.mail.internet.MimeMessage;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Service;


@Service
public class EmailService {

    @Autowired
    private JavaMailSender javaMailSender;

    @Value("${spring.mail.username}")
    private String sender;

    public void sendOrderConfirmationEmail(String recipient, String orderDetails) throws MessagingException {

        MimeMessage message = javaMailSender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(message, true);


        helper.setTo(recipient);
        helper.setSubject("New Order Registered");
        helper.setText("A new order was created, Order Information is : "
                + orderDetails);

        javaMailSender.send(message);
    }

    public void sendOrderChangeEmail(String recipient, String orderDetails) throws MessagingException {
        MimeMessage message = javaMailSender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(message, true);

        helper.setTo(recipient);
        helper.setSubject("There was a Change in an Order");
        helper.setText("There was a change in a pending order, New Order information is : "
                + orderDetails);

        javaMailSender.send(message);
    }
}

在我的应用程序属性中，我配置：spring.mail.host=smtp.gmail.com spring.mail.port、spring.mail.username、spring.mail.password、spring.mail.properties.mail.smtp.auth、spring.mail.properties.mail.smtp.starttls.enable、mail.newOrders.destination（我想将通知发送到的电子邮件）;

当我调用服务时：

@PostMapping
    public ResponseEntity<order> create_order(@RequestBody order order){
        order newOrder = order_service.create_order(order);
        try {
            emailService.sendOrderConfirmationEmail(receiverMail, order.getOrderDetails());
        } catch (MessagingException e) {
            System.out.println("Error sending confirmation email");
        }
        return new ResponseEntity<>(newOrder, HttpStatus.CREATED);
    }

它返回以下错误：

java.lang.ClassNotFoundException: javax.activation.DataContentHandler

奇怪的是，如果我添加依赖项：

<dependency>
    <groupId>javax.activation</groupId>
    <artifactId>javax.activation-api</artifactId>
    <version>1.2.0</version>
</dependency>

然后它返回以下内容：

Failed message 1: java.lang.ClassCastException: class org.apache.geronimo.mail.handlers.TextHandler cannot be cast to class jakarta.activation.DataContentHandler (org.apache.geronimo.mail.handlers.TextHandler and jakarta.activation.DataContentHandler are in unnamed module of loader 'app')] with root cause

org.springframework.mail.MailSendException: Failed messages: java.lang.ClassCastException: class org.apache.geronimo.mail.handlers.TextHandler cannot be cast to class jakarta.activation.DataContentHandler (org.apache.geronimo.mail.handlers.TextHandler and jakarta.activation.DataContentHandler are in unnamed module of loader 'app')

我能做些什么来解决这个问题？