SpringCloudH第三章：服务提供者创建

本章讲解springCloud服务提供者的创建

服务则为简单的数据库查询操作（使用mybatis）开始操作吧。

跟第二章一样：在parent下创建一个maven工程，你也可以直接创建spring工程。

pom.xml如下

<?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">
    <parent>
        <artifactId>parent</artifactId>
        <groupId>com.cloudH</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <modelVersion>4.0.0</modelVersion>
    <packaging>jar</packaging>
    <artifactId>payMent8081</artifactId>
    <description>支付模块</description>


    <build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <configuration>
                <mainClass>com.atguigu.springcloud.PaymentMain8001</mainClass>
            </configuration>
            <executions>
                <execution>
                    <goals>
                        <goal>repackage</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
    </build>

    <dependencies>
        <!--包含了sleuth+zipkin-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zipkin</artifactId>
        </dependency>
        <!--<dependency>
            <groupId>com.atguigu.springcloud</groupId>
            <artifactId>cloud-api-common</artifactId>
            <version>${project.version}</version>
        </dependency>-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--eureka client-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <!--监控-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <!--如果没写版本,从父层面找,找到了就直接用,全局统一-->
            <version>${druid.spring.boot.starter.version}</version>
        </dependency>
        <!--mysql-connector-java-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <!--jdbc-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <!--热部署-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>


        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
    </dependencies>


</project>

添加aplication.yml
1）设置端口
2）设置服务名称
3）设置向某个服务中心进行注册

server:
  port: 8080
spring:
  application:
   name: CLOUD-PROVIDER-HYSTRIX-PAYMENT
  datasource:
    # 当前数据源操作类型
    type: com.alibaba.druid.pool.DruidDataSource
    # mysql驱动类
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/db2019?useUnicode=true&characterEncoding=UTF-8&useSSL=false&serverTimezone=GMT%2B8
    username: 
    password: 
eureka:
  client:
    register-with-eureka: true
    fetch-registry: true
    service-url:
       defaultZone: http://localhost:7001/eureka

mybatis:
  mapper-locations: classpath*:mapper/*.xml
  type-aliases-package: com.atguigu.springcloud.entities

启动类

/**
 * 支付模块启动类
 * EnableEurekaClient 开启eureka
 * EnableDiscoveryClient 开启服务发现
 *
 * @author zzyy
 * @create 2020/2/17 21:13
 **/
@SpringBootApplication
@EnableEurekaClient
@EnableDiscoveryClient
public class PaymentMain8001 {
    public static void main(String[] args) {
        SpringApplication.run(PaymentMain8001.class, args);
    }

由于演示带数据库访问涉及到mybaties的代码过多，所以文章就直接controller返回成功。数据库访问代码在git上。
服务提供的controller类

package com.atguigu.springcloud.controller;
import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import com.atguigu.springcloud.service.PaymentService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import java.util.List;
import java.util.concurrent.TimeUnit;

/**
 * @author zzyy
 * @date 2020/2/18 10:43
 **/
@RestController
@Slf4j
public class PaymentController {

    @Value("${server.port}")
    private String serverPort;

    /**
     * 正常访问
     * @param id
     * @return
     */
    @GetMapping("/payment/hystrix/ok/{id}")
    public String paymentInfo_OK(@PathVariable("id") Integer id){
        return  "正常访问 😄";
    }
}

先启动第二章的Eureka服务注册中心，再启动我们的服务提供者，
成功后访问Eureka服务器（localhost:7001），服务列表出现我们提供的服务
CLOUD-PROVIDER-HYSTRIX-PAYMENT

image.png

SpringCloudH第三章：服务提供者创建

gitHua地址：https://github.com/HelloWordChenC/springCloudH/tree/master/payMent8081