Spring Boot微服务开发实例——项目开发-网关项目！

网关项目

网关项目需要单独新建gateway工程，并在pom.xml文件中添加相关依赖，代码如下：

<?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>2.3.9.RELEASE</version>

<relativePath/> <!--lookup parent from

repository -->

</parent>

<groupId>com.example.gateway</groupId>

<artifactId>gateway</artifactId>

<version>0.0.1-SNAPSHOT</version>

<name>gateway</name>

<description>Gateway project for Spring

Boot</description>

<properties>

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

</properties>

<dependencies>

<dependency>

<groupId>org.projectlombok</groupId>

<artifactId>lombok</artifactId>

<optional>true</optional>

</dependency>

<dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter

test</artifactId>

<scope>test</scope>

<exclusions>

<exclusion>

<groupId>org.junit.vintage</groupId>

<artifactId>junit

vintage-engine</artifactId>

</exclusion>

</exclusions>

</dependency>

<dependency>

<groupId>org.springframework.cloud</groupId>

<artifactId>spring-cloud-starter

gateway</artifactId>

</dependency>

<dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter

validation</artifactId>

</dependency>

</dependencies>

<dependencyManagement>

<dependencies>

<dependency>

<groupId>org.springframework.cloud</groupId>

<artifactId>spring-cloud

dependencies</artifactId>

<version>Hoxton.RC2</version>

<type>pom</type>

<scope>import</scope>

</dependency>

</dependencies>

</dependencyManagement>

<build>

<plugins>

<plugin>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot

maven-plugin</artifactId>

<configuration>

<excludes>

<exclude>

<groupId>org.projectlombok</groupId>

<artifactId>lombok</artifactId>

</exclude>

</excludes>

</configuration>

</plugin>

</plugins>

</build>

</project>

设置路由断言配置，具体信息如下：

server:

port: 80

spring:

application:

name: gateway

cloud:

gateway:

routes:

-id: promotion_route

uri: http://127.0.0.1:8081/

predicates:

-Path=/api/**

启动网关服务与促销活动微服务项目，通过网关的路由断言，直接访问http://
localhost/api/pushPromotion?id=1接口，返回数据如下：

{

code: "S00000",

msg: "success",

result: {

id: 3,

name: "会员促销活动",

beginTime: 1614822680,

endTime: 1617176808,

prize: "3天免费会员"

}

}

可以看到，与直接访问微服务接口的返回数据一致。

项目部署

（1）采用Spring Boot的Maven打包插件，将3个项目分别打包为promotion.jar、
microservice-promotion.jar和gateway.jar。

（2）采用java -jar ***.jar命令分别启动3个项目，可以将它们部署在虚拟机或云平台之上。