SpringCloudAlibaba服务消费者调用nacos服务报错:java.net.UnknownHostException: xxx-编程知识

SpringCloudAlibaba服务消费者调用nacos服务报错:java.net.UnknownHostException: xxx

确保服务情况正常

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通过服务名字调用(注意不需要添加端口号)

@RequestMapping("/add")
public String add() {String url = "http://stock-nacos/stock/reduce";String result = restTemplate.getForObject(url, String.class);System.out.println("下单成功");return "Hello World" + result;
}

在 SpringBoot 项目中调用另外的服务报错：

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父pom配置如下，即当前使用的版本

<?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><modules><module>order-nacos</module><module>stock-nacos</module></modules><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.6.11</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.example</groupId><artifactId>mavenmodule</artifactId><version>0.0.1-SNAPSHOT</version><name>mavenmodule</name><description>mavenmodule</description><packaging>pom</packaging><properties><java.version>1.8</java.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency></dependencies><dependencyManagement><!--Spring Cloud alibaba的版本管理，通过dependency完成继承--><dependencies><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-alibaba-dependencies</artifactId><version>2021.0.4.0</version><type>pom</type><scope>import</scope></dependency></dependencies></dependencyManagement><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

服务消费者启动类(进行服务名字调用必须添加注解@LoadBalanced)

@SpringBootApplication
public class OrderNacosApplication {public static void main(String[] args) {SpringApplication.run(OrderNacosApplication.class, args);}@Bean@LoadBalancedpublic RestTemplate restTemplate(RestTemplateBuilder builder) {RestTemplate restTemplate = builder.build();return restTemplate;}
}

原来的pom文件配置

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd"><parent><artifactId>mavenmodule</artifactId><groupId>com.example</groupId><version>0.0.1-SNAPSHOT</version></parent><modelVersion>4.0.0</modelVersion><artifactId>order-nacos</artifactId><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId></dependency></dependencies></project>

解决方法，点击当前的以来的com.alibaba.cloud进去，然后搜索loadbalancer,，然后复制这个负载均衡依赖到pom中

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添加过的pom文件配置

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd"><parent><artifactId>mavenmodule</artifactId><groupId>com.example</groupId><version>0.0.1-SNAPSHOT</version></parent><modelVersion>4.0.0</modelVersion><artifactId>order-nacos</artifactId><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-loadbalancer</artifactId><version>3.1.4</version></dependency><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId></dependency></dependencies>
</project>