SpringCloud技术整理(二)服务注册

项目地址:

https://github.com/zackzhangCN/SpringCloudDemo

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创建Microservice_Example1模块

• 在SpringCloudExample项目下创建一个模块, 用于注册到eureka server

• 编辑Microservice_Example1模块的pom文件

引入web依赖和eureka client依赖

    <packaging>jar</packaging>

    <dependencies>
        <!--引入web依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--注册到eureka server注册中心只需要eureka客户端依赖-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <!--引入lombok依赖, 用于简化实体类的get,set,构造函数等等-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
    </dependencies>

• 编辑Microservice_Example1模块的配置文件

server:
  port: 8001

# 应用名(微服务名)
spring:
  application:
    name: microservice-example

eureka:
  instance:
    # 是否注册到eureka server
    prefer-ip-address: true
    # 当前实例主机名
    hostname: microservice_example1
  client:
    service-url:
      # eureka server1注册中心的地址
      defaultZone: http://localhost:8761/eureka

• 编辑Microservice_Example1的启动类

package cn.zack;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * @author zack
 * 只对外提供服务的服务提供者一
 */
@SpringBootApplication
public class Microservice_Example1_Application {
    public static void main(String[] args) {
        SpringApplication.run(Microservice_Example1_Application.class, args);
    }
}

• 在Microservice_Example1模块创建一个User类

package cn.zack.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

/**
 * @author zack
 * User实体类
 */
@Data
@AllArgsConstructor
@NoArgsConstructor
public class User {
    private String username;
    private String password;
}

• 在Microservice_Example1模块编写方法供外部调用

package cn.zack.controller;

import cn.zack.pojo.User;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.*;

/**
 * @author zack
 * 服务提供者一
 */
@Slf4j
@RestController
public class ExampleController {

    @GetMapping(path = "fun1")
    public String fun1() throws InterruptedException {
        log.info("test入参======");
        // Thread.sleep(100000);
        return "调用example1.fun1";
    }

    @GetMapping(path = "fun2")
    public String fun2(String param1, String param2) {
        log.info("test入参======, param1:{}, param2:{}", param1, param2);
        return "param1 : " + param1 + "\r\nparam2 : " + param2;
    }

    @PostMapping(path = "/fun4")
    public String fun4(@RequestBody User user) {
        // 手动添加除零异常
        int a = 1 / 0;
        return "username: " + user.getUsername() + "\r\npassword: " + user.getPassword();
    }
}

• 先启动Example_Eureka1, 再启动Microservice_Example1

可以看到eureka注册中心启动正常, eureka server本身和Microservice_Example1都成功注册为服务.

而Microservice_Example1提供的服务也可以正常使用.