整合Spring Cloud Alibaba Dubbo和Nacos以及PostgreSQL的代码实例涉及到很多配置和代码，但我可以提供一个简化的示例。
- 在
pom.xml中添加Spring Cloud Alibaba Dubbo和Nacos依赖：
<dependencies>
<!-- Spring Cloud Alibaba Dubbo -->
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-dubbo</artifactId>
</dependency>
<!-- Spring Cloud Alibaba Nacos Discovery -->
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
<!-- PostgreSQL -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<scope>runtime</scope>
</dependency>
</dependencies>- 配置application.properties或application.yml文件：
spring:
datasource:
url: jdbc:postgresql://localhost:5432/yourdb
username: yourusername
password: yourpassword
driver-class-name: org.postgresql.Driver
dubbo:
application:
name: dubbo-provider
registry:
address: nacos://localhost:8848
protocol:
name: dubbo
port: -1
spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848- 创建Dubbo服务接口和实现：
public interface GreetingService {
String sayHello(String name);
}
@Service
public class GreetingServiceImpl implements GreetingService {
@Autowired
private JdbcTemplate jdbcTemplate;
public String sayHello(String name) {
jdbcTemplate.execute("INSERT INTO greetings (message) VALUES ('Hello, " + name + "')");
return "Hello, " + name;
}
}- 启动类添加
@EnableDubbo注解：
@SpringBootApplication
@EnableDubbo
public class DubboProviderApplication {
public static void main(String[] args) {
SpringApplication.run(DubboProviderApplication.class, args);
}
}以上代码提供了一个简单的Dubbo服务，该服务会在PostgreSQL数据库中记录一条问候信息。这只是整合示例的一部分，实际应用中还需要更多配置和安全措施。