然后需要引入nacos的discovery和config两个依赖(版本和其他模块对应即可,一般直接引入common模块即可):
<!-- 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>
</dependency>
然后配置下注册中心地址和配置中心地址:
application.properties:
# 应用名称
spring.application.name=gulimall-gateway
spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
创建个bootstrap.properties:
spring.application.name=gulimall-gateway
spring.cloud.nacos.config.server-addr=127.0.0.1:8848
然后启动项目:
因为我是引入的common模块,那个模块引入了mybatisplus相关依赖,需要配置数据库信息,解决方法直接在启动类上:
@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
再次启动即可成功。
使用示例(创建个application.yml):
spring:
cloud:
gateway:
routes:
- id: to_baidu
uri: https://www.baidu.com
predicates:
- Query=to,baidu #如果携带参数to=baidu则匹配成功,跳转至uri
- id: to_qq
uri: https://www.qq.com
predicates:
- Query=to,qq
访问即可看到效果:
http://localhost:88/?to=baidu
http://localhost:88/?to=qq
也可以用编码方式:
package com.atguigu.springcloude.config;
import org.springframework.cloud.gateway.route.RouteLocator;
import org.springframework.cloud.gateway.route.builder.RouteLocatorBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
/**
* @author baikunlong
* @date 2020/12/9 9:37
* 配置路由的第二种方式:采用编码
*/
@Configuration
public class GatewayConfig {
@Bean
public RouteLocator myRouteLocator(RouteLocatorBuilder builder){
RouteLocatorBuilder.Builder routes = builder.routes();
// 如果路径包含/guonei则跳转至uri
routes.route("baidu",r->r.path("/guonei").uri("http://news.baidu.com/guonei"));
return routes.build();
}
@Bean
public RouteLocator myRouteLocator2(RouteLocatorBuilder builder){
RouteLocatorBuilder.Builder routes = builder.routes();
routes.route("baidu2",r->r.path("/guoji").uri("http://news.baidu.com/guoji"));
return routes.build();
}
}
可以自定义过滤器:
package com.atguigu.springcloude.filter;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;
import java.time.LocalDateTime;
/**
* @author baikunlong
* @date 2020/12/9 11:07
*/
@Component
@Slf4j
public class MyLogGatewayFilter implements GlobalFilter, Ordered {
@Override
public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
log.info("进入我的过滤器:"+ LocalDateTime.now());
if(exchange.getRequest().getQueryParams().getFirst("uname")==null){
log.info("用户名为空,禁止访问");
exchange.getResponse().setStatusCode(HttpStatus.NOT_ACCEPTABLE);
return exchange.getResponse().setComplete();
}
return chain.filter(exchange);
}
@Override
public int getOrder() {
//过滤器的顺序,越小等级越高
return 0;
}
}
其他示例:
spring:
application:
name: cloud-gateway
cloud:
gateway:
discovery:
locator:
enabled: true #开启从注册中心动态创建路由的功能,利用微服务名进行路由
# 配置路由的第一种方式:采用yml配置(这种简单)
routes:
- id: payment_routh #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: http://localhost:8001 #匹配后提供服务的路由地址
uri: lb://cloud-payment-service #匹配后提供服务的路由地址
predicates:
- Path=/payment/get/** # 断言,路径相匹配的进行路由
- id: payment_routh2 #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: http://localhost:8001 #匹配后提供服务的路由地址
uri: lb://cloud-payment-service #匹配后提供服务的路由地址
# 断言的所有规则些在该项目启动时会打印
predicates:
- Path=/payment/lb/** # 断言,路径相匹配的进行路由
# - After=2020-12-09T10:51:37.485+08:00[Asia/Shanghai] #在多久之后才能访问系统
# Between就可以做秒杀活动,只有该时间段内才能访问系统,否则都是404
# - Between=2020-12-09T10:51:37.485+08:00[Asia/Shanghai],2020-12-09T11:51:37.485+08:00[Asia/Shanghai]
# - Cookie=username,zzyy #必须携带username=zzyy的cookie,像这样:curl http://localhost:9527/payment/lb --cookie "username=zzyy"
# - Header=X-Request-Id, \d+ # 请求头要有X-Request-Id属性并且值为整数的正则表达式,像这样curl http://localhost:9527/payment/lb -H "X-Request-Id:111"
# 还有一些有用到再看