gateway的在springboot中的使用

gataway的在springboot中的使用

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2962人浏览 · 2022-06-29 14:50:33

__坤 · 2022-06-29 14:50:33 发布

gateway的使用

1创建一个Maven项目(gateway作为父项目)

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导入依赖

<?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.chaoxing</groupId>
    <artifactId>gateway</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>gateway</name>
    <description>gateway</description>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.8.RELEASE</version>
    </parent>
    <modules>
        <module>gateway-client</module>
        <module>gateway-server</module>
    </modules>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.8</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpcore -->
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpcore</artifactId>
            <version>4.4.12</version>
        </dependency>


        <dependency>
            <groupId>commons-lang</groupId>
            <artifactId>commons-lang</artifactId>
            <version>2.6</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>
        <!--        服务注册/发现-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

        <!--        配置中心来做配置管理-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
            <version>2.1.1.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>javax.validation</groupId>
            <artifactId>validation-api</artifactId>
            <version>2.0.1.Final</version>
        </dependency>


    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>2.1.0.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

</project>

</project>

创建gateway-client作为客户端即为路由转向的服务

在这里插入图片描述

导入依赖

<?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.chaoxing</groupId>
    <artifactId>gateway-client</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>gateway-client</name>
    <description>gateway-client</description>
    <!--    <properties>-->
    <!--&lt;!&ndash;        <java.version>1.8</java.version>&ndash;&gt;-->
    <!--&lt;!&ndash;        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>&ndash;&gt;-->
    <!--&lt;!&ndash;        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>&ndash;&gt;-->
    <!--&lt;!&ndash;        <spring-boot.version>2.3.0.RELEASE</spring-boot.version>&ndash;&gt;-->
    <!--    </properties>-->

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.8.RELEASE</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.8</version>
        </dependency>

        <!-- ht tps://mvnrepository.com/artifact/org.apache.httpcomponents/httpcore -->
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpcore</artifactId>
            <version>4.4.12</version>
        </dependency>


        <dependency>
            <groupId>commons-lang</groupId>
            <artifactId>commons-lang</artifactId>
            <version>2.6</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>
        <!--        服务注册/发现-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

        <!--        配置中心来做配置管理-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
            <version>2.1.1.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>javax.validation</groupId>
            <artifactId>validation-api</artifactId>
            <version>2.0.1.Final</version>
        </dependency>


    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>2.1.0.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

</project>

建立controller
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即为跳转到的服务

package com.chaoxing.GateWayClient.contorllerr;

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

@RestController
@RequestMapping("name")
public class GateWayClientController {
    @RequestMapping("/getname")
    public String test() {
        return "my name is Zkun";
    }
}

修改Application
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package com.chaoxing.GateWayClient;

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

@SpringBootApplication
@EnableDiscoveryClient
public class GateWayClientpplication {

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

}

添加并修改配置文件
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application.properties

spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
server.port=9090

boostrap.properties

spring.cloud.nacos.config.server-addr=127.0.0.1:8848
spring.application.name=gatawaydemo
spring.cloud.nacos.config.namespace=7d7e9d28-54b3-4bec-9312-0b310df601cb

在这里插入图片描述
注意：此处的是在nacos的命名规则里取名获得即

名字可不同，但后面的id需要一致，配置文件中的name在后来的服务绑定中有用
客户端配置完毕

服务端配置
依赖：

<?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.example</groupId>
    <artifactId>gateway</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>gateway</name>
    <description>网关的使用</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Greenwich.SR3</spring-cloud.version>
    </properties>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.8.RELEASE</version>
    </parent>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
            <version>2.1.3.RELEASE</version>
        </dependency>

        <!--        服务注册/发现-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

        <!--        配置中心来做配置管理-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
            <version>2.1.1.RELEASE</version>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>

            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>2.1.0.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

        </dependencies>

    </dependencyManagement>


</project>

建立服务端项目gateway-server
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跨域问题：首先处理的即为跨域问题

建立configruation，代码如下，此为通用代码

package com.example.gateway.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.reactive.CorsWebFilter;
import org.springframework.web.cors.reactive.UrlBasedCorsConfigurationSource;

@Configuration
public class configruation {
    @Bean
    public CorsWebFilter corsWebFilter(){
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();

        CorsConfiguration corsConfiguration = new CorsConfiguration();

        //1、配置跨域
        corsConfiguration.addAllowedHeader("*");
        corsConfiguration.addAllowedMethod("*");
        corsConfiguration.addAllowedOrigin("*");
        corsConfiguration.setAllowCredentials(true);

        source.registerCorsConfiguration("/**",corsConfiguration);
        return new CorsWebFilter(source);
    }
}

添加并修改配置文件
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applocation.properties

spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
server.port=88

bootstrap.properties
在这里插入图片描述
此处也是nacos命名规则中绑定的内容

spring.cloud.nacos.config.server-addr=127.0.0.1:8848
spring.application.name=gataway
spring.cloud.nacos.config.namespace=c6d7cb62-65d4-41ce-b800-63a5266538f5

application.yml（重要）
在这里插入图片描述
id为自己取得名字，url中的即为前面客户端设置的name，path中的name为自己设置的方法

spring:
  cloud:
    gateway:
      routes:
        - id: gatawaydemo
          uri: lb://gatawaydemo  #这里的名字必须和项目配置文件 的项目名一致
          predicates:
            - Path=/api/name/**  #访问 /api/thirdparty 这个路径就路由到
          filters:                    #路径重写 成一下 这里中间逗号， 前面是截取的路径，后面是替换的路径
            #也就是你看以为你实际访问是 /api/thirdparty/oss/policy，实际上它是吧 /api//api/thirdparty这一段给丢了，只要只要oss/policy
            #
            - RewritePath=/api/(?<segment>.*),/$\{segment}

给主方法添加注释
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服务端完毕

运行
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上面为自己设置的端口号+地址
下面即为自己设置的服务实现

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