Spring Cloud Zuul

新建Spring Boot工程,命名为zuul

1.pom.xml添加依赖

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
 
    <groupId>com.dzpykj</groupId>
    <artifactId>zuul</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>
 
    <name>zuul</name>
    <description>Demo project for Spring Boot</description>
 
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.9.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>
 
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>
 
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Edgware.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
 
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zuul</artifactId>
        </dependency>
    </dependencies>
 
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
 
    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>
</project>

2.将application.properties重命名为application.yml,并且添加配置

server:
  port: 8767
spring:
  application:
    name: zuul
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/
zuul:
  routes:
    service1:
      path: /service1/**
      serviceId: ribbon
    service2:
      path: /service2/**
      serviceId: feign

3.启动类添加注解@EnableZuulProxy开启Zuul

package com.dzpykj;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.netflix.zuul.EnableZuulProxy;
 
@SpringBootApplication
@EnableEurekaClient
@EnableZuulProxy
public class ZuulApplication {
 
    public static void main(String[] args) {
        SpringApplication.run(ZuulApplication.class, args);
    }
}

4.改造前几篇随笔中的代码

4.1 将ribbon工程com.dzpykj.controller.HelloController的代码改造

package com.dzpykj.controller;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
 
import com.dzpykj.hystrixService.HelloService;
 
@RestController
public class HelloController {
 
//    @Autowired
//    RestTemplate restTemplate;
 
    @Autowired
    HelloService helloService;
 
//    @RequestMapping("/hello/{name}")
//    public String hello(@PathVariable String name) {
//        return restTemplate.getForObject("http://eurekaclient/hi?name="+name, String.class);
//    }
 
    @RequestMapping("/hello/{name}")
    public String hi(@PathVariable String name) {
        return helloService.hello(name);
    }
}

4.2 将ribbon工程com.dzpykj.hystrixService.HelloService的代码改造

package com.dzpykj.hystrixService;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;
 
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
 
@Service
public class HelloService {
 
    @Value("${server.port}")
    String port;
 
    @Autowired
    RestTemplate restTemplate;
 
    @HystrixCommand(fallbackMethod = "helloErrorFallBack")
    public String hello(String name) {
        return restTemplate.getForObject("http://eurekaclient/hi?name="+name+"(ribbon)", String.class);
    }
 
    public String helloErrorFallBack(String name) {
        return "Sorry "+name+",when you are visting ribbon hystrix project,port:"+port+",you meet an error";
    }
}

4.3 将feign工程com.dzpykj.controller.HelloController的代码改造

package com.dzpykj.controller;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
 
import com.dzpykj.feignInterface.HelloInterface;
 
@RestController
public class HelloController {
 
    @Autowired
    HelloInterface helloInterface;
 
    @RequestMapping("/hello/{name}")
    public String hello(@PathVariable String name) {
        return helloInterface.hello(name+"(feign)");
    }
}

5.依次启动Eureka服务集群、Eureka客户端集群、Ribbon工程

5.1 按照Spring Cloud Eureka Server集群Demo级搭建的步骤启动Eureka服务peer1,peer2集群

5.2 按照Spring Cloud Eureka服务Demo级搭建最后面的步骤,分别启动8763,8764两个Eureka客户端形成集群

5.3 启动Ribbon工程

5.4 启动Feign工程

5.5 启动Zuul工程

6.访问http://127.0.0.1:8767/service1/hello/chaixy;http://127.0.0.1:8767/service2/hello/chaixy

7.这篇随笔代码较琐碎,GitHub源码在此处 https://github.com/PinBo1991/springcloud