Spring Cloud Alibaba 路由網關(Gateway，完整可用)

1.先完成nacos-server項目，提供服務

2.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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.cxb</groupId>
  <artifactId>nacos-server</artifactId>
  <version>0.0.1-SNAPSHOT</version>

  <name>nacos-server</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>
<parent>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-parent</artifactId>
	<version>2.0.5.RELEASE</version> <!-- lookup parent from repository -->
</parent>
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
  </properties>
<dependencyManagement>
	<dependencies>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-dependencies</artifactId>
			<version>Finchley.SR1</version>
			<type>pom</type>
			<scope>import</scope>
		</dependency>
		<dependency>
			<groupId>com.alibaba.cloud</groupId>
			<artifactId>spring-cloud-alibaba-dependencies</artifactId>
			<version>2.0.0.RELEASE</version>
			<type>pom</type>
			<scope>import</scope>
		</dependency>
	</dependencies>
</dependencyManagement>
  <dependencies>
    <dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-actuator</artifactId>
		</dependency>
		<dependency>
			<groupId>com.alibaba.cloud</groupId>
			<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
		</dependency>
		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
			<version> 1.16.22</version>
			<optional>true</optional>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
  </dependencies>

  <build>
    
  </build>
</project>

3.application.properties

server.port=8070
spring.application.name=cloud-nacos-server

spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848

4.CloudNacosServerApplication

package com.cxb.nacos_server;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

/**
 * Hello world!
 *
 */
@EnableDiscoveryClient
@SpringBootApplication
public class CloudNacosServerApplication 
{
    public static void main( String[] args )
    {
        SpringApplication.run(CloudNacosServerApplication.class, args);
    }
    
    @RestController
	class EchoController {
		@RequestMapping(value = "/echo/{string}", method = RequestMethod.GET)
		public String echo(@PathVariable String string) {
			return "hello Nacos Discovery " + string;
		}

		@RequestMapping(value = "/divide", method = RequestMethod.GET)
		public String divide(@RequestParam Integer a, @RequestParam Integer b) {
			return String.valueOf(a / b);
		}
	}
}

5.啓動服務

******************gateway******************

1.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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>com.cxb</groupId>
	<artifactId>nacos-gataway</artifactId>
	<version>0.0.1-SNAPSHOT</version>

	<name>nacos-gataway</name>
	<!-- FIXME change it to the project's website -->
	<url>http://www.example.com</url>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.0.5.RELEASE</version> <!-- lookup parent from repository -->
	</parent>
	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<maven.compiler.source>1.8</maven.compiler.source>
		<maven.compiler.target>1.8</maven.compiler.target>
	</properties>
	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>Finchley.SR1</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
			<dependency>
				<groupId>com.alibaba.cloud</groupId>
				<artifactId>spring-cloud-alibaba-dependencies</artifactId>
				<version>2.0.0.RELEASE</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
		</dependencies>
	</dependencyManagement>
	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-actuator</artifactId>
		</dependency>
		<dependency>
			<groupId>com.alibaba.cloud</groupId>
			<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-gateway</artifactId>
		</dependency>
		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
			<version> 1.16.22</version>
			<optional>true</optional>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>

	</dependencies>

	<build>

	</build>
</project>

2.application.properties

server.port=18085
#\u914D\u7F6E Nacos Server \u5730\u5740
spring.application.name=nacos-gateway
spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
management.endpoints.web.exposure.include=*

# \u914D\u7F6E\u6587\u4EF6\u4E2D\u914D\u7F6E Spring Cloud Gateway \u8DEF\u7531
spring.cloud.gateway.routes[0].id=nacos-route
#\u683C\u5F0F\u4E3A\uFF1Alb://\u5E94\u7528\u6CE8\u518C\u670D\u52A1\u540D
spring.cloud.gateway.routes[0].uri=lb://cloud-nacos-server
spring.cloud.gateway.routes[0].predicates[0].name=Path
spring.cloud.gateway.routes[0].predicates[0].args[pattern]=/nacos/**
spring.cloud.gateway.routes[0].filters[0]=StripPrefix=1

3.GatawayApplication

package com.cxb.nacos_gataway;

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

/**
 * Hello world!
 *
 */
@EnableDiscoveryClient
@SpringBootApplication
public class GatawayApplication 
{
    public static void main( String[] args )
    {
        SpringApplication.run(GatawayApplication.class, args);
    }
}

4.啓動項目測試

訪問http://localhost:8070/echo/456 調用服務本身的接口

通過gateway配置的訪問：http://localhost:18085/nacos/echo/8999

http://localhost:18085/nacos/divide?a=10&b=2

這裏實現找了很多demo參考，要麼pom文件的依賴各種報錯，要麼properties裏面的配置各種不能用，雖說文件少，特麼花了我大半天的時間，心塞啊（桑心0.0）