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3.springcloudalibaba gateway项目搭建
前言
前面已经完成了springcloudalibaba项目搭建，接下来搭建gateway项目，这里启动两个服务，一个是gateway服务，一个是server服务，请求从gateway到server服务。
一、搭建gateway项目
1.1 pom配置
<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-gateway</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-loadbalancer</artifactId> </dependency>- 1
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这里的lb需要加上，否则使用 lb://方式寻找服务，启动后请求报错如下
Service Unavailable 503- 1
完整的pom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> <groupId>com.springcloudalibaba</groupId> <artifactId>gateway</artifactId> <version>0.0.1-SNAPSHOT</version> <name>gateway</name> <description>Demo project for Spring Boot</description> <properties> <java.version>8</java.version> <spring-boot.version>2.6.13</spring-boot.version> <spring-cloud.version>2021.0.5</spring-cloud.version> <spring-cloud-alibaba.version>2021.0.5.0</spring-cloud-alibaba.version> </properties> <dependencies> <!-- SpringCloud Gateway --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-gateway</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-loadbalancer</artifactId> </dependency> <!-- SpringCloud Alibaba Nacos --> <dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId> </dependency> <!-- SpringCloud Alibaba Nacos Config --> <dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-bootstrap</artifactId> </dependency> </dependencies> <dependencyManagement> <dependencies> <!-- SpringCloud 微服务 --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> <!-- SpringCloud Alibaba 微服务 --> <dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-alibaba-dependencies</artifactId> <version>${spring-cloud-alibaba.version}</version> <type>pom</type> <scope>import</scope> </dependency> <!-- SpringBoot 依赖配置 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-dependencies</artifactId> <version>${spring-boot.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> <version>2.6.0</version> <configuration> <excludes> <exclude> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </exclude> </excludes> </configuration> </plugin> </plugins> </build> </project>- 1
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1.2 新增配置如下
spring: cloud: gateway: discovery: locator: #开启服务发现功能，从注册中心获取服务列表，（nacos->服务管理->服务列表） #默认服务名称需要为大写，可以通过配置lower-case-service-id: true 改变这一规则 enabled: true routes: - id: server #payment_route #路由的ID，没有固定规则但要求唯一，建议配合服务名 uri: lb://server #匹配后提供服务的路由地址 predicates: - Path=/server/** - Method=GET,POST- 1
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- -Path=/server/**： 匹配 /server/路径下的到server服务
二、新增server服务
2.1 pom配置
这要增加web模块和增加@EnableDiscoveryClient到启动类即可
server端pom配置如下<?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> <groupId>com.springcloudalibaba</groupId> <artifactId>server</artifactId> <version>0.0.1-SNAPSHOT</version> <name>server</name> <description>Demo project for Spring Boot</description> <properties> <java.version>8</java.version> <spring-boot.version>2.6.13</spring-boot.version> <spring-cloud.version>2021.0.5</spring-cloud.version> <spring-cloud-alibaba.version>2021.0.5.0</spring-cloud-alibaba.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- SpringCloud Alibaba Nacos --> <dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId> </dependency> <!-- SpringCloud Alibaba Nacos Config --> <dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-bootstrap</artifactId> </dependency> </dependencies> <dependencyManagement> <dependencies> <!-- SpringCloud 微服务 --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> <!-- SpringCloud Alibaba 微服务 --> <dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-alibaba-dependencies</artifactId> <version>${spring-cloud-alibaba.version}</version> <type>pom</type> <scope>import</scope> </dependency> <!-- SpringBoot 依赖配置 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-dependencies</artifactId> <version>${spring-boot.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> <version>2.6.0</version> <configuration> <excludes> <exclude> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </exclude> </excludes> </configuration> </plugin> </plugins> </build> </project>- 1
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2.2新增测试接口如下
package com.springcloudalibaba.gateway.control; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Value; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RestController; @RestController public class Control { @RequestMapping(value = "/hello") public String index() { System.out.println("testname: "); return "testName"; } }- 1
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三、测试验证
3.1 分别启动两个服务，查看nacos是否注册成功
查看日志，和查看nacos上的服务，可以知道已经注册成功了。3.2 测试
这里新增了一个hello的接口，请求地址如下
http://localhost:8080/server/hello
这个请求会先到gateway服务然后再去请求server服务，http://localhost:8080/server/hello–>
http://localhost:8081/hello,可以看到返回结果和server中的代码返回一致，测试成功。总结
1.alibaba lb的包和gateway的一起使用，否则使用lb方式查找服务会有问题，导致请求失败。
2.- Path=/server/** 表示路径带server的路由到你指定的服务中去，真正请求的时候会去掉server这一截。 -
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- 原文地址：https://blog.csdn.net/qq_34526237/article/details/133709595
