Nacos集成Spring Cloud Gateway使用第二章：上手demo

本次demo为Nacos集成Spring Cloud Gateway，并且使用openfeign实现服务间的相互调用

如需要查看理解：上一章：Nacos集成Spring Cloud Gateway使用第一章:理解解释

如需引用nacos的配置中心则查看下一章：Nacos集成Spring Cloud Gateway使用第三章：nacos配置中心

nacos安装的教程直接根据官网的一步步来吧 https://nacos.io/zh-cn/docs/quick-start.html

1.新建一个springcloud项目

内涵一个网关两个服务

1.1 父类pom

<?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">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>nacos-gateway</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.12.RELEASE</version>
        <relativePath/>
    </parent>

    <modules>
        <module>gateway</module>
        <module>serverone</module>
        <module>servertwo</module>
    </modules>

    <dependencies>
        <!-- spring-cloud  -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>Greenwich.SR3</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>

        <!--注册中心 实现服务的注册与发现
        注意：版本 2.1.x.RELEASE 对应的是 Spring Boot 2.1.x 版本。版本 2.0.x.RELEASE 对应的是 Spring Boot 2.0.x 版本，版本 1.5.x.RELEASE 对应的是 Spring Boot 1.5.x 版本。
        -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            <version>2.1.2.RELEASE</version>
        </dependency>

        <!-- spring-boot-test  -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

　　1.2 网关层服务

pom文件

<?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>
    <!-- 我是一个模拟注册nacos的一个服务 ,网关层 -->
    <parent>
        <groupId>org.example</groupId>
        <artifactId>nacos-gateway</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <groupId>com.demo</groupId>
    <artifactId>gateway</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>gateway</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <!-- 网关 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
            <version>2.1.3.RELEASE</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

　　yml配置文件

server:
  port: 13008
spring:
  application:
    name: gateway
  cloud:
    nacos:
      discovery:
        server-addr: 自己nacos的地址
        ip: 127.0.0.1
        group: gatewaynacos
        namespace: demo
    gateway:
      discovery:
        locator:
          #是否与服务发现组件进行结合，通过 serviceId 转发到具体的服务实例。默认为false，设为true便开启通过服务中心的自动根据 serviceId 创建路由的功能
          enabled: true
          #开启小写，#路由访问方式：http://Gateway_HOST:Gateway_PORT/大写的serviceId/**，其中微服务应用名默认大写访问。
          lower-case-service-id: true
      routes:
      #第一个服务的路由规则
      - id: serverone
        # uri以lb://开头（lb代表从注册中心获取服务），后面接的就是你需要转发到的服务名称
        uri: lb://serverone
        predicates:
        #以后访问 http://127.0.0.1:13008/serverone/one/hello/two，ip:端口/自定义path/接口地址
        - Path=/serverone/**
        #第二个服务的路由规则
      - id: servertwo
        uri: lb://servertwo
        predicates:
        - Path=/servertwo/**

　　gateway启动类文件

package com.demo.gateway;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

@SpringBootApplication
@EnableDiscoveryClient //开启服务注册发现功能
public class GatewayApplication {

    public static void main(String[] args) {
        SpringApplication.run(GatewayApplication.class, args);
    }

}

　　1.3 第一个服务

pom文件

<?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>
    <!-- 我是一个模拟注册nacos的一个服务  -->
    <parent>
        <groupId>org.example</groupId>
        <artifactId>nacos-gateway</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <groupId>com.demo</groupId>
    <artifactId>serverone</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>serverone</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.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>
            <version>2.1.3.RELEASE</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

　　ServeroneApplication

package com.demo.serverone;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.openfeign.EnableFeignClients;

@SpringBootApplication
@EnableDiscoveryClient //开启服务注册发现功能
@EnableFeignClients
public class ServeroneApplication {

    public static void main(String[] args) {
        SpringApplication.run(ServeroneApplication.class, args);
    }


}

　　OneHelloController

package com.demo.serverone;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping(value = "one")
public class OneHelloController {

    @Autowired
    public ServiceClient serviceClient;

    @GetMapping("/hello")
    public String hello(){
        return "hello,我是1号";
    }

    @GetMapping("/hello/two")
    public void hellotwo(){
        serviceClient.test("hello2号，我是从1号来的");
    }

}

　　ServiceClient

package com.demo.serverone;

import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;

@FeignClient(value = "servertwo")
public interface ServiceClient {

    @GetMapping(value = "/two/hello/one")
    void test(@RequestParam(value = "test")String test);
}

application.yml

server:
  port: 9088
spring:
  application:
    name: serverone
  cloud:
    nacos:
      discovery:
        server-addr: 自己的nacos地址 改成自己的
        ip: 127.0.0.1
        group: gatewaynacos
        namespace: demo

1.4 第二个服务

pom

<?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>
    <!-- 我是一个模拟注册nacos的一个服务  -->
    <parent>
        <groupId>org.example</groupId>
        <artifactId>nacos-gateway</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <groupId>com.demo</groupId>
    <artifactId>servertwo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>servertwo</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.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>
            <version>2.1.3.RELEASE</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

　　application.yml

server:
  port: 9087
spring:
  application:
    name: servertwo
  cloud:
    nacos:
      discovery:
        server-addr: nacos的地址 改成自己的
        ip: 127.0.0.1
        group: gatewaynacos
        namespace: demo

　　ServertwoApplication

package com.demo.servertwo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

@SpringBootApplication
@EnableDiscoveryClient //开启服务注册发现功能
public class ServertwoApplication {

    public static void main(String[] args) {
        SpringApplication.run(ServertwoApplication.class, args);
    }

}

　　TwoHelloController

package com.demo.servertwo;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping(value = "two")
public class TwoHelloController {

    @GetMapping("/hello")
    public String hello() {
        return "hello,我是2号";
    }


    @GetMapping("/hello/one")
    public void helloOne(@RequestParam(value = "test") String test) {
        System.out.println(test);
    }
}

　　测试：

　　创建完成后，会在nacos里面看到自己注册的服务

　　测试可以通过网关访问到第一个服务，ip+网关端口/自己定义的服务名/接口

尝试从第一个服务调用第二个服务，直接打开网址或者自己测试类随便 http://127.0.0.1:13008/serverone/one/hello/two

ok 成功。

posted @ 2020-12-04 10:24 Nuti 阅读(1346) 评论(0) 编辑收藏举报

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Nuti

Nacos集成Spring Cloud Gateway使用第二章：上手demo

1.新建一个springcloud项目

1.1 父类pom

1.2 网关层服务

yml配置文件

gateway启动类文件

1.3 第一个服务

pom文件

ServeroneApplication

OneHelloController

ServiceClient

application.yml

1.4 第二个服务

pom

application.yml

ServertwoApplication

TwoHelloController

公告

　　1.2 网关层服务

　　yml配置文件

　　gateway启动类文件

　　1.3 第一个服务

　　ServeroneApplication

　　OneHelloController

　　ServiceClient

　　application.yml

　　ServertwoApplication

　　TwoHelloController