要让Apache Kafka与Spring Boot应用程序和OAuth一起工作，您可以使用Spring Kafka和Spring Security OAuth2来实现。

下面是一个示例代码，演示了如何在Spring Boot应用程序中使用Apache Kafka和OAuth：

1.首先，添加必要的依赖项到您的pom.xml文件中：

    org.springframework.boot
    spring-boot-starter-security



    org.springframework.security.oauth.boot
    spring-security-oauth2-autoconfigure



    org.springframework.kafka
    spring-kafka

2.在您的Spring Boot应用程序的配置文件中，配置Kafka的连接信息和OAuth2的配置信息：

# Kafka配置
spring.kafka.bootstrap-servers=localhost:9092

# OAuth2配置
security.oauth2.client.client-id=your-client-id
security.oauth2.client.client-secret=your-client-secret
security.oauth2.client.access-token-uri=https://your-oauth2-provider.com/oauth/token
security.oauth2.resource.user-info-uri=https://your-oauth2-provider.com/userinfo

3.创建一个Kafka生产者和消费者：

import org.springframework.kafka.annotation.KafkaListener;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.stereotype.Component;

@Component
public class KafkaProducerConsumer {

    private final KafkaTemplate kafkaTemplate;

    public KafkaProducerConsumer(KafkaTemplate kafkaTemplate) {
        this.kafkaTemplate = kafkaTemplate;
    }

    public void sendMessage(String topic, String message) {
        kafkaTemplate.send(topic, message);
    }

    @KafkaListener(topics = "my-topic")
    public void receiveMessage(String message) {
        System.out.println("Received message: " + message);
    }
}

4.创建一个控制器来处理发送和接收Kafka消息的请求：

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/kafka")
public class KafkaController {

    private final KafkaProducerConsumer kafkaProducerConsumer;

    public KafkaController(KafkaProducerConsumer kafkaProducerConsumer) {
        this.kafkaProducerConsumer = kafkaProducerConsumer;
    }

    @PostMapping("/send/{topic}")
    public void sendMessage(@PathVariable String topic, @RequestBody String message) {
        kafkaProducerConsumer.sendMessage(topic, message);
    }

    @GetMapping("/receive")
    public void receiveMessage() {
        // 消费者会自动接收消息
    }
}

5.配置Spring Security OAuth2以保护您的应用程序：

import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            .authorizeRequests()
                .antMatchers("/kafka/send/**").hasRole("USER") // 只允许具有"USER"角色的用户发送消息
                .anyRequest().authenticated()
            .and()
                .oauth2Login();
    }
}

现在，您可以使用KafkaController发送和接收Kafka消息。发送消息的端点是/kafka/send/{topic}，接收消息的端点是/kafka/receive。

请确保您正确配置了Kafka的连接信息和OAuth2的配置信息，并替换your-client-id，your-client-secret，https://your-oauth2-provider.com/oauth/token和https://your-oauth2-provider.com/userinfo为实际的值。

希望这个例子能帮助您实现Apache Kafka与Spring Boot应用程序和OAuth的集成。