【Spring Cloud Alibaba】Nacos的服务注册和发现（discovery）的使用

import com.alibaba.nacos.api.annotation.NacosInjected;
import com.alibaba.nacos.api.exception.NacosException;
import com.alibaba.nacos.api.naming.NamingService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
 
@RestController
public class NacosDiscoveryController {
 
    @NacosInjected
    private NamingService namingService;
 
    @Autowired
    private NamingService namingService2;
 
    @GetMapping("/registerInstance")
    public String registerInstance(@RequestParam String serviceName,
                                   @RequestParam String ip,
                                   @RequestParam int port) throws NacosException {
        namingService.registerInstance(serviceName, ip, port);
        return "Instance registered.";
    }
 
    @GetMapping("/deregisterInstance")
    public String deregisterInstance(@RequestParam String serviceName,
                                     @RequestParam String ip,
                                     @RequestParam int port) throws NacosException {
        namingService.deregisterInstance(serviceName, ip, port);
        return "Instance de-registered.";
    }
 
    // 使用NacosInjected和Autowired的示例
    @GetMapping("/injectedExample")
    public String injectedExample() {
        if (namingService == namingService2) {
            return "NamingService instances are equal.";
        } else {
            return "NamingService instances are not equal.";
        }
    }
}

这段代码演示了如何在Spring Boot应用中使用Nacos作为服务注册和发现的组件。它提供了两个API接口来注册和注销服务实例，并演示了如何使用@NacosInjected和@Autowired注入NamingService实例。通过这个示例，开发者可以学习如何在实际的生产环境中使用Nacos作为服务注册中心。