FeignClient如何通过配置变量调用配置文件url
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通过配置变量调用配置文件url
1.application.yml 配置文件配置参数
feign:
sys: http://127.0.0.1:87772.ISysFeignClient.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: 8111
spring:
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: 8112
spring:
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;
@RestController
public 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: 8113
spring:
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;
@RestController
public 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】
以上为个人经验，希望能给大家一个参考，也希望大家多多支持编程网。
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