004 springCloudAlibaba Gateway

本文主要是介绍004 springCloudAlibaba Gateway，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

gatewayServer

GatewayServerApplication.java

package com.example;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
@EnableFeignClients
public class GatewayServerApplication {public static void main(String[] args) {SpringApplication.run(GatewayServerApplication.class, args);}}

ServletInitializer.java

package com.example;import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;public class ServletInitializer extends SpringBootServletInitializer {@Overrideprotected SpringApplicationBuilder configure(SpringApplicationBuilder application) {return application.sources(GatewayServerApplication.class);}}

application.yaml

#服务名称 端口
server:port: 9090
spring:application:name: gatewayServercloud:nacos:  # nacos urldiscovery:server-addr: localhost:8848sentinel: #sentinel urltransport:dashboard: localhost:8080gateway:   # gatewaydiscovery:locator:enabled: true #开启gateway从nacos上获取服务列表routes:- id: order_routeuri: lb://orderServer # 假设orderServer已经在服务注册中心（如Nacos）注册predicates:- Path=/order/**- Method=GET,POST- Before=2025-07-09T17:42:47.789-07:00[Asia/Shanghai]- id: product_routeuri: lb://productServer # 假设productServer已经在服务注册中心（如Nacos）注册predicates:- Path=/product/**feign:sentinel:enabled: true

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 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>com.example</groupId><artifactId>springCloudAlibaba</artifactId><version>0.0.1-SNAPSHOT</version></parent><groupId>com.example</groupId><artifactId>gatewayServer</artifactId><version>0.0.1-SNAPSHOT</version><packaging>war</packaging><name>gatewayServer</name><description>gatewayServer</description><properties><java.version>1.8</java.version></properties><dependencies><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId></dependency><!--SpringCloud ailibaba sentinel --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-sentinel</artifactId></dependency><!--openfeign--><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-openfeign</artifactId></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-gateway</artifactId></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-loadbalancer</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-tomcat</artifactId><scope>provided</scope></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

orderServer

OrderController.java

package com.example.controller;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;@RestController
@RequestMapping("order")
public class OrderController {@Value("${server.port}")private String serverPort;@Autowiredprivate ProductClient productClient;@GetMapping("save")public String save(){//在订单中 要有商品的信息 proId = 9Integer proId = 9;String productResult = productClient.getProductById(proId);System.out.println("在订单中 要有商品的信息 proId = "+proId + productResult);//return "订单服务"+serverPort+"正在下订单";return "订单服务 "+serverPort+" "+productResult;}//    @GetMapping("order/{orderId}")
//    public String getById(@PathVariable("orderId") Integer orderId){
//        System.out.println("订单服务port="+serverPort+"上查询id="+orderId+"的订单");
//        return "port:"+serverPort +"查询到id="+orderId+"的订单";
//    }}

ProductClient.java

package com.example.controller;import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;@FeignClient("productServer")
public interface ProductClient {@GetMapping("product/{proId}")public String getProductById(@PathVariable("proId") Integer proId);}

OrderServerApplication.java

package com.example;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
@EnableFeignClients
public class OrderServerApplication {public static void main(String[] args) {SpringApplication.run(OrderServerApplication.class, args);}}

ServletInitializer.java

package com.example;import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;public class ServletInitializer extends SpringBootServletInitializer {@Overrideprotected SpringApplicationBuilder configure(SpringApplicationBuilder application) {return application.sources(OrderServerApplication.class);}}

application.yaml

server:port: 9001spring:application:name: orderServercloud:nacos:server-addr: localhost:8848 # ?????URLsentinel:transport:dashboard: localhost:8080 #??Sentinel dashboard??port: 8719management:endpoints:web:exposure:include: '*'feign:sentinel:enabled: true # ??Sentinel?Feign???

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 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>com.example</groupId><artifactId>springCloudAlibaba</artifactId><version>0.0.1-SNAPSHOT</version></parent><groupId>com.example</groupId><artifactId>orderServer</artifactId><version>0.0.1-SNAPSHOT</version><packaging>war</packaging><name>orderServer</name><description>orderServer</description><properties><java.version>1.8</java.version></properties><dependencies><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-sentinel</artifactId></dependency><!--        内置了 LoadBalancer 负载均衡器--><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-loadbalancer</artifactId></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-openfeign</artifactId></dependency><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-tomcat</artifactId><scope>provided</scope></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

productServer

ProductController.java

package com.example.controller;import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.example.entity.Product;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;@RestController
@RequestMapping("product")
public class ProductController {@Value("${server.port}")private Integer serverPort;@GetMapping("/{proId}")@SentinelResource(value = "getById",blockHandler = "handleBlock",fallback = "handleFallback")public String getById(@PathVariable("proId") Integer proId){Product product = new Product(proId,"保温杯",69.9F,"images/cup.png");System.out.println("商品服务"+serverPort+"正在查询商品:"+proId);//int i = 10/0;return product.toString();}/*** 违背流控规则,blockHandler* product/{proId}* 有流控规则,QPS <= 1* 若超过流量阈值，blockHandler*/public String handleBlock(@PathVariable("proId") Integer proId, BlockException exception) {return "商品查询请求QPS>1,超过流量阈值";}/*** 业务有异常,fallback*/public String handleFallback(@PathVariable("proId") Integer proId,Throwable e) {Product product = new Product();product.setProductId(proId);product.setProducutName("保温杯");return "[fallback]商品查询的信息是:" + product;}}

Product.java

package com.example.entity;public class Product {private Integer productId;private String producutName;private Float producutPrice;private String producutImg;public Product(){}public Product(Integer productId, String producutName, Float producutPrice, String producutImg) {this.productId = productId;this.producutName = producutName;this.producutPrice = producutPrice;this.producutImg = producutImg;}public Integer getProductId() {return productId;}public void setProductId(Integer productId) {this.productId = productId;}public String getProducutName() {return producutName;}public void setProducutName(String producutName) {this.producutName = producutName;}public Float getProducutPrice() {return producutPrice;}public void setProducutPrice(Float producutPrice) {this.producutPrice = producutPrice;}public String getProducutImg() {return producutImg;}public void setProducutImg(String producutImg) {this.producutImg = producutImg;}@Overridepublic String toString() {return "Product{" +"productId=" + productId +", producutName='" + producutName + '\'' +", producutPrice=" + producutPrice +", producutImg='" + producutImg + '\'' +'}';}
}

ProductServerApplication.java

package com.example;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;@SpringBootApplication
@EnableDiscoveryClient
public class ProductServerApplication {public static void main(String[] args) {SpringApplication.run(ProductServerApplication.class, args);}}

ServletInitializer.java

package com.example;import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;public class ServletInitializer extends SpringBootServletInitializer {@Overrideprotected SpringApplicationBuilder configure(SpringApplicationBuilder application) {return application.sources(ProductServerApplication.class);}}

application.yaml

server:port: 7001spring:application:name: productServercloud:nacos:server-addr: localhost:8848  # ???? nacos ???sentinel:transport:dashboard: localhost:8080 #??Sentinel dashboard??port: 8719management:endpoints:web:exposure:include: '*'feign:sentinel:enabled: true # ??Sentinel?Feign???

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 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>com.example</groupId><artifactId>springCloudAlibaba</artifactId><version>0.0.1-SNAPSHOT</version></parent><groupId>com.example</groupId><artifactId>productServer</artifactId><version>0.0.1-SNAPSHOT</version><packaging>war</packaging><name>productServer</name><description>productServer</description><properties><java.version>1.8</java.version></properties><dependencies><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-sentinel</artifactId></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-openfeign</artifactId></dependency><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-tomcat</artifactId><scope>provided</scope></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

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 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>2.7.6</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.example</groupId><artifactId>springCloudAlibaba</artifactId><version>0.0.1-SNAPSHOT</version><name>springCloudAlibaba</name><description>springCloudAlibaba</description><modules><module>orderServer</module><module>productServer</module><module>gatewayServer</module></modules><packaging>pom</packaging><properties><java.version>1.8</java.version><spring-cloud.version>2021.0.4</spring-cloud.version><spring-cloud-alibaba.version>2021.0.4.0</spring-cloud-alibaba.version></properties><dependencyManagement><dependencies><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-dependencies</artifactId><version>${spring-cloud.version}</version><type>pom</type><scope>import</scope></dependency><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-alibaba-dependencies</artifactId><version>${spring-cloud-alibaba.version}</version><type>pom</type><scope>import</scope></dependency></dependencies></dependencyManagement><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

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