springcloud-Hoxton 学习教程（可参考jar包依赖版本）

创建一个父项目，引入maven依赖

一开始引入的时候，依赖冲突很多，心态爆炸，下面是可以用的依赖版本号：
注意：dependencyManagement标签，只是做了版本归一，后面的子项目在引入jar包的时候如果父pom有规定，可以不写版本号

<?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.yf</groupId>
    <artifactId>springcloud1</artifactId>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>springcloud-consumer-dept</module>
        <module>springcloud-eureka</module>
        <module>springcloud-eureka-7002</module>
        <module>springcloud-eureka-7003</module>
        <module>springcloud_privider_dept_8002</module>
        <module>springcloud_privider_dept_8003</module>

    </modules>
    <packaging>pom</packaging>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Hoxton.SR1</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>2.2.2.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>


            <!--数据库连接-->
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.47</version>
            </dependency>
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid</artifactId>
                <version>1.1.10</version>
            </dependency>

            <!--            springboot启动器-->

            <dependency>
                <groupId>org.mybatis.spring.boot</groupId>
                <artifactId>mybatis-spring-boot-starter</artifactId>
                <version>1.3.0</version>
            </dependency>

            <!--单元测试-->
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>4.12</version>
                <scope>test</scope>
            </dependency>

            <!--日志-->
            <dependency>
                <groupId>ch.qos.logback</groupId>
                <artifactId>logback-core</artifactId>
                <version>1.2.3</version>
            </dependency>
            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>1.2.17</version>
            </dependency>

            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>1.18.16</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>

    </dependencies>


</project>

创建子项目-springcloud-api-存放数据库实体映射类

pom文件

  <parent>
        <artifactId>springcloud1</artifactId>
        <groupId>com.yf</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>springcloud-api</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
    </dependencies>

映射实体类

创建子项目-dept生产者app

新建模块-父项目选择springcloud1 ，

编辑pom文件

<?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>springcloud1</artifactId>
        <groupId>com.yf</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>springcloud-privider-dept</artifactId>

    <dependencies>
        <!--需要拿实体类-->
        <dependency>
            <groupId>com.yf</groupId>
            <artifactId>springcloud-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
        </dependency>

        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-core</artifactId>
        </dependency>

        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
        </dependency>

        <!--test-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-test</artifactId>
            <version>2.3.8.RELEASE</version>
        </dependency>

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

        </dependency>

        <!--jetty-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jetty</artifactId>
            <version>2.1.4.RELEASE</version>

        </dependency>

        <!--热部署-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
            <version>1.4.6.RELEASE</version>
        </dependency>

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

    </dependencies>


</project>

spring配置yam文件

application.yml文件：

server:
  port: 8001
mybatis:
  type-aliases-package: com.yf.pojo
  config-location: classpath:mybatis/mybatis-config.xml
  mapper-locations: classpath:mybatis/mapper/*.xml

# spring 配置
spring:
  application:
    name: spring-cloud-privider-dept
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: org.gjt.mm.mysql.Driver
    url: jdbc:mysql://localhost:3306/db01?useUnicode=true&characterEncoding=utf-8
    username: root
    password: yf1234


#eureka配置，服务注册到哪里？
eureka:
  client:
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7003.com:7003/eureka/,http://eureka7002.com:7002/eureka/
  instance:
    instance-id: spring-cloud-provider-dept8001 #修改eureka上的配置信息

#info信息
info:
  app.name: yf-springcloud
  company.name: baidu.com

mybatis配置

这里省略，详情可参数我github代码：

代码

启动类

@SpringBootApplication
@EnableEurekaClient  //在服务启动后，自动注册到eureka中
@EnableDiscoveryClient  //服务发现
public class DeptProvider {
    public static void main(String[] args) {
        SpringApplication.run(DeptProvider.class,args);
    }
}

代码结构：

package com.yf.controller;

import com.yf.pojo.Dept;
import com.yf.service.DeptService;
import org.springframework.beans.factory.annotation.Autowired;
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.PostMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.websocket.server.PathParam;
import java.util.List;

@RestController
public class DeptController {

    @Autowired
    private DeptService deptService;
    //获取一些配置信息，得到具体的微服务
    @Autowired
    private DiscoveryClient client;

    @PostMapping("/dept/add")
    public boolean addDept(Dept dept) {
        return deptService.addDept(dept);
    }

    @GetMapping("/dept/get")
    public Dept queryById(@PathParam("id") Long id) {
        return deptService.queryById(id);
    }

    @GetMapping("/dept/list")
    public List<Dept> queryAll() {

        return deptService.queryAll();
    }

    //注册进来的微服务，获取一些信息
    @GetMapping("/dept/discovery")
    public Object discovery() {
        //获取微服务列表的清单
        List<String> services = client.getServices();
        System.out.println("discovery=>services:" + services);

        //得到具体的微服务信息，通过具体的微服务id,applicationName
        List<ServiceInstance> instances = client.getInstances("spring-cloud-privider-dept");

        for (ServiceInstance instance : instances) {
            System.out.println(
                    instance.getHost() + "\t"
                            + instance.getPort() + "\t" +
                            instance.getUri() + "\t"
                            + instance.getServiceId());
        }
        return this.client;
    }
}

@Mapper
@Repository
public interface DeptDao {
    public boolean addDept(Dept dept);
    public Dept queryById(Long id);
    public List<Dept> queryAll();
}

public interface DeptService {
    public boolean addDept(Dept dept);
    public Dept queryById(Long id);
    public List<Dept> queryAll();
}

@Service
public class DeptServiceImpl implements DeptService {

    @Autowired
    private DeptDao deptDao;

    public boolean addDept(Dept dept) {

        return deptDao.addDept(dept);
    }

    public Dept queryById(Long id) {
        return deptDao.queryById(id);
    }

    public List<Dept> queryAll() {
        return deptDao.queryAll();
    }
}

启动项目，测试：

测试通过，可以直接调用到

eureka 来搭建集群和ribbon 实现负载均衡

没时间写啦，详情参考我github代码
https://github.com/yfnb/springcloud1

springcloud所用到的注解：

参考：
https://blog.csdn.net/u014666697/article/details/90756644