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通过配置变量调用配置文件url
application.yml 配置文件配置参数
feign: sys: http://127.0.0.1:8777ISysFeignClient.java 使用@FeignClient时配置
@FeignClient(value = "sys",url = "${feign.sys}")public interface ISysFeignClient { @GetMapping("/sys/queryPlatMenus") List<Map<String, Object>> queryPlatMenus();}这样部署开发时就可以只需要修改一处yml配置url就可以了。
调用指定的动态URL
1 创建demo1服务
pom.xml
<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.5.3</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.demo</groupId><artifactId>demo1</artifactId><version>0.0.1-SNAPSHOT</version><name>demo1</name><description>Demo project for Spring Boot</description><properties><java.version>1.8</java.version><spring-cloud.version>2020.0.3</spring-cloud.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-openfeign</artifactId></dependency><!-- eureka --><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-netflix-eureka-client</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency></dependencies><dependencyManagement><dependencies><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-dependencies</artifactId><version>${spring-cloud.version}</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>application-dev1.yml
server: port: 8111spring: application: name: ${APPLICATION_NAME:demo1}eureka: client: fetch-registry: true register-with-eureka: true service-url: defaultZone: http://localhost:18880/eureka instance: instance-id: ${spring.cloud.client.ip-address}:${server.port} prefer-ip-address: trueapplication-dev2.yml
server: port: 8112spring: application: name: ${APPLICATION_NAME:demo1}eureka: client: fetch-registry: true register-with-eureka: true service-url: defaultZone: http://localhost:18880/eureka instance: instance-id: ${spring.cloud.client.ip-address}:${server.port} prefer-ip-address: trueIndexController.java
package com.demo.demo1.controller;import org.springframework.beans.factory.annotation.Value;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RestController;@RestControllerpublic class IndexController { @Value("${server.port}") private String port; @GetMapping("/hello") public String hello(){ System.out.println("进入" + port + "服务器"); return "返回的端口为：" + port; }}2 创建demo2服务
pom.xml
<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.5.3</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.demo</groupId><artifactId>demo2</artifactId><version>0.0.1-SNAPSHOT</version><name>demo2</name><description>Demo project for Spring Boot</description><properties><java.version>1.8</java.version><spring-cloud.version>2020.0.3</spring-cloud.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-openfeign</artifactId></dependency><!-- eureka --><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-netflix-eureka-client</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency></dependencies><dependencyManagement><dependencies><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-dependencies</artifactId><version>${spring-cloud.version}</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>application.yml
server: port: 8113spring: application: name: ${APPLICATION_NAME:demo2}eureka: client: fetch-registry: true register-with-eureka: true service-url: defaultZone: http://localhost:18880/eureka instance: instance-id: ${spring.cloud.client.ip-address}:${server.port} prefer-ip-address: trueDemoFeign.java
package com.demo.demo2.Feign;import org.springframework.cloud.openfeign.FeignClient;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import java.net.URI;//@FeignClient(name = "DEMO1", url="EMPTY")@FeignClient(name = "DEMO1", url="http://localhost:8111")public interface DemoFeign { @RequestMapping(value = "/hello", method = RequestMethod.GET) String hello(); @RequestMapping(value = "/hello", method = RequestMethod.GET) String hello1(URI uri);}IndexController.java
package com.demo.demo2.controller;import com.demo.demo2.Feign.DemoFeign;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;import java.net.URI;@RestControllerpublic class IndexController { @Autowired private DemoFeign demoFeign; @GetMapping("/testFeign") public String testFeign(){ System.out.println("在demo2服务中，调用demo1的服务"); String resultStr = demoFeign.hello(); System.out.println("在demo2服务中，调用demo1的服务，返回的结果：" + resultStr); return "在demo2服务中，调用demo1的服务，返回的结果：" + resultStr; } @GetMapping("/testFeign2") public String testFeign2(@RequestParam String server) throws Exception{ String url = ""; if("1".equals(server)){ url = "http://localhost:8111"; }else if("2".equals(server)){ url = "http://localhost:8112"; } System.out.println("在demo2服务中，调用demo1的服务" + url); String resultStr = demoFeign.hello1(new URI(url)); System.out.println("在demo2服务中，调用demo1的服务，返回的结果：" + resultStr); return "在demo2服务中，调用demo1的服务，返回的结果：" + resultStr; }}测试
指定服务器ip
http://localhost:8113/testFeign2?server=1
返回【在demo2服务中，调用demo1的服务，返回的结果：返回的端口为：8111】
http://localhost:8113/testFeign2?server=2
返回【在demo2服务中，调用demo1的服务，返回的结果：返回的端口为：8112】
使用默认的地址
http://localhost:8113/testFeign
返回【在demo2服务中，调用demo1的服务，返回的结果：返回的端口为：8111】
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