这篇文章主要介绍nacos gateway动态路由怎么用，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！
说明：本次测试使用的gateway是2.2.2.RELEASE版本，其他版本可能存在不同
<!--gateway网关依赖--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-gateway</artifactId> </dependency> <!--nacos依赖--> <dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId> </dependency> <dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId> </dependency> <!--json工具包--> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.47</version> </dependency>
server: port: 8200 spring: application: name: lc-gateway cloud: nacos: discovery: #注册中心地址 server-addr: 106.12.146.239:8848 config: server-addr: 106.12.146.239:8848 # 配置中心-指定命名空间 namespace: bb79a8c4-e4e1-4a27-bceb-0810f278b5aa # 指定配置文件后缀 file-extension: yaml #配置组 group: DEFAULT_GROUP #配置dateId data-id: lc-gateway #获取配置超时时间 timeout: 5000 gateway: #设置超时时间默认 httpclient: connect-timeout: 1000 response-timeout: 5s
ps：这里集成了nacos配置中心想了解详情请移步spring cloud集成nacos配置中心
package com.lc.api.gateway.config;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.nacos.api.NacosFactory;
import com.alibaba.nacos.api.config.ConfigService;
import com.alibaba.nacos.api.config.listener.Listener;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.gateway.event.RefreshRoutesEvent;
import org.springframework.cloud.gateway.route.RouteDefinition;
import org.springframework.cloud.gateway.route.RouteDefinitionWriter;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.context.ApplicationEventPublisherAware;
import org.springframework.stereotype.Service;
import reactor.core.publisher.Mono;
import javax.annotation.PostConstruct;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import java.util.concurrent.Executor;
/**
* 动态路由，可以通过获取Bean才做该类，提供增删改查已经发布功能
*
* @Author: lc
* @Date: 2020/7/8 15:49
*/
@Service
public class DynamicRouteConfig implements ApplicationEventPublisherAware {
private static final Logger logger = LoggerFactory.getLogger(DynamicRouteConfig.class);
@Autowired
private RouteDefinitionWriter routedefinitionWriter;
private ApplicationEventPublisher publisher;
@Value("${spring.cloud.nacos.config.data-id}")
private String dataId;
@Value("${spring.cloud.nacos.config.group}")
private String group;
@Value("${spring.cloud.nacos.config.server-addr}")
private String serverAddr;
@Value("${spring.cloud.nacos.config.namespace}")
private String namespace;
@Value("${spring.cloud.nacos.config.timeout}")
private long timeout;
private static final List<String> ROUTE_LIST = new ArrayList<>();
@PostConstruct
public void dynamicRouteByNacosListener() {
try {
Properties prop = new Properties();
prop.put("serverAddr", serverAddr);
prop.put("namespace", namespace);
ConfigService config = NacosFactory.createConfigService(prop);
String content = config.getConfig(dataId, group, timeout);
publisher(content);
config.addListener(dataId, group, new Listener() {
@Override
public void receiveConfigInfo(String config) {
publisher(config);
}
@Override
public Executor getExecutor() {
return null;
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 增加路由
*
* @param def
* @return
*/
public Boolean addRoute(RouteDefinition def) {
try {
routedefinitionWriter.save(Mono.just(def)).subscribe();
ROUTE_LIST.add(def.getId());
} catch (Exception e) {
e.printStackTrace();
}
return true;
}
/**
* 删除路由
*
* @return
*/
public Boolean clearRoute() {
for (String id : ROUTE_LIST) {
routedefinitionWriter.delete(Mono.just(id)).subscribe();
}
ROUTE_LIST.clear();
return Boolean.FALSE;
}
/**
* 发布路由
*/
private void publisher(String config) {
clearRoute();
try {
logger.info("Start updating dynamic routing ....");
List<RouteDefinition> routeDefinitionList = JSONObject.parseArray(config, RouteDefinition.class);
for (RouteDefinition route : routeDefinitionList) {
logger.info(route.toString());
addRoute(route);
}
publisher.publishEvent(new RefreshRoutesEvent(this.routedefinitionWriter));
logger.info("update completed ");
} catch (Exception e) {
logger.error("Failed to update routing information", e);
e.printStackTrace();
}
}
@Override
public void setApplicationEventPublisher(ApplicationEventPublisher applicationEventPublisher) {
publisher = applicationEventPublisher;
}
}1.说明
2.新建一个网关配置
3. 添加配置格式如下
这里我就不注释了大家应该都能看懂
[
{
"filters": [
{
"args": {
"parts": "1"
},
"name": "StripPrefix"
}
],
"id": "authent1",
"order": -1,
"predicates": [
{
"args": {
"pattern": "/authent/**"
},
"name": "Path"
}
],
"uri": "lb://lc-authenticate"
}
]
创建，使用initilizer，
Group：com.atguigu.gulimall
Artifact： gulimall-gateway
package：com.atguigu.gulimall.gateway
搜索gateway选中。
pom.xml里加上common依赖， 修改jdk版本
spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848 spring.application.name=gulimall-gateway server.port=88
spring.application.name=gulimall-gateway spring.cloud.nacos.config.server-addr=127.0.0.1:8848 spring.cloud.nacos.config.namespace=ab66aff2-0bd5-4f80-8a68-760d6ff7d96d
然后在命名空间里创建文件guilmall-gateway.yml
spring: application: name: gulimall-gateway
spring: cloud: gateway: routes: - id: after_route uri: https://www.xiaomi.com predicates: - Query=url,xiaomi # 若参数等于断言 则跳转到指定的uri
运行结果
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