java配置nacos访问指定clustername
时间: 2023-08-16 20:03:23 浏览: 143
Java nacos压缩包
要配置Java访问指定的Nacos ClusterName,可以在Java代码中使用Nacos提供的ConfigService和NamingService,如下所示:
1. 配置文件中添加Nacos的配置信息,包括Nacos服务器的地址和ClusterName:
```
spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
spring.cloud.nacos.discovery.cluster-name=myCluster
```
2. 在Java代码中使用ConfigService获取Nacos中的配置信息:
```java
import com.alibaba.nacos.api.config.ConfigService;
import com.alibaba.nacos.api.exception.NacosException;
import com.alibaba.nacos.api.utils.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RefreshScope
public class ConfigController {
@Autowired
private ConfigService configService;
@GetMapping("/getConfig")
public String getConfig(String dataId, String group) throws NacosException {
if (StringUtils.isBlank(dataId) || StringUtils.isBlank(group)) {
return "dataId和group不能为空";
}
String content = configService.getConfig(dataId, group, 5000);
if (StringUtils.isBlank(content)) {
return "配置信息为空";
}
return content;
}
}
```
3. 在Java代码中使用NamingService获取Nacos中的服务列表:
```java
import com.alibaba.nacos.api.naming.NamingService;
import com.alibaba.nacos.api.naming.pojo.Instance;
import com.alibaba.nacos.api.utils.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
import java.util.stream.Collectors;
@RestController
public class ServiceController {
@Autowired
private DiscoveryClient discoveryClient;
@Autowired
private NamingService namingService;
@GetMapping("/service/{serviceName}")
public List<String> getService(@PathVariable String serviceName) throws Exception {
if (StringUtils.isBlank(serviceName)) {
return null;
}
List<ServiceInstance> instances = discoveryClient.getInstances(serviceName);
List<Instance> nacosInstances = namingService.getAllInstances(serviceName);
List<String> nacosInstanceIds = nacosInstances.stream().map(Instance::getInstanceId).collect(Collectors.toList());
return nacosInstanceIds;
}
}
```
在上面的代码中,我们使用了DiscoveryClient和NamingService来获取服务列表,其中DiscoveryClient是Spring Cloud提供的服务发现客户端,而NamingService是Nacos提供的服务发现客户端。我们可以看到,在使用NamingService时,我们没有指定ClusterName,这是因为在配置文件中已经指定了ClusterName。
希望对你有所帮助!
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