二、springcloud微服务测试环境搭建

版本说明：

springcloud:Greenwich.SR3

springboot:2.1.8

1、构建步骤

1.1、microservicecloud整体父工程Project

新建父工程microservicecloud，切记是Packageing是pom模式

此maven project目的：主要是定义POM文件，将后续各个子模块公用的jar包等统一提出来，类似一个抽象父类

pom.xml

<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.jiatp.springcloud</groupId>
  <artifactId>microservicecloud</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>pom</packaging>
  <properties>
   <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
   <maven.compiler.source>1.8</maven.compiler.source>
   <maven.compiler.target>1.8</maven.compiler.target>
   <junit.version>4.12</junit.version>
   <log4j.version>1.2.17</log4j.version>
   <lombok.version>1.18.10</lombok.version>
  </properties>

  <dependencyManagement>
   <dependencies>
     <dependency>
       <groupId>org.springframework.cloud</groupId>
       <artifactId>spring-cloud-dependencies</artifactId>
       <version>Greenwich.SR3</version>
       <type>pom</type>
       <scope>import</scope>
     </dependency>
     <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-dependencies</artifactId>
       <version>2.1.8.RELEASE</version>
       <type>pom</type>
       <scope>import</scope>
     </dependency>
     <dependency>
       <groupId>mysql</groupId>
       <artifactId>mysql-connector-java</artifactId>
       <version>5.0.4</version>
     </dependency>
     <dependency>
       <groupId>com.alibaba</groupId>
       <artifactId>druid</artifactId>
       <version>1.1.20</version>
     </dependency>
     <dependency>
       <groupId>org.mybatis.spring.boot</groupId>
       <artifactId>mybatis-spring-boot-starter</artifactId>
       <version>2.1.0</version>
     </dependency>
     <dependency>
       <groupId>ch.qos.logback</groupId>
       <artifactId>logback-core</artifactId>
       <version>1.2.3</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
       <version>${junit.version}</version>
       <scope>test</scope>
     </dependency>
     <dependency>
       <groupId>log4j</groupId>
       <artifactId>log4j</artifactId>
       <version>${log4j.version}</version>
     </dependency>
   </dependencies>
  </dependencyManagement>

  <build>
   <finalName>microservicecloud</finalName>
   <resources>
     <resource> <!--以$ 开头 在src/main/resources目录下的 都能读取 -->
       <directory>src/main/resources</directory>
       <filtering>true</filtering>
     </resource>
   </resources>
   <plugins>
     <plugin>
       <groupId>org.apache.maven.plugins</groupId>
       <artifactId>maven-resources-plugin</artifactId>
       <configuration>
         <delimiters>
          <delimit>$</delimit>
         </delimiters>
       </configuration>
     </plugin>
   </plugins>
  </build>
  <modules>
  	<module>microservicecloud-api</module>
  	<module>microservicecloud-provider-dept-8001</module>
  	<module>microservicecloud-consumer-dept-80</module>
  </modules>
</project>

1.2、microservicecloud-api公共子模块Module

右击父工程microservicecloud新建maven module，Packageing是jar模式,创建完成后请回到父工程查看pom文件。

pom.xml

<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>
  <parent>
  <!-- 子类里面显示声明才能有明确的继承表现，无意外就是父类的默认版本否则自己定义 -->
    <groupId>com.jiatp.springcloud</groupId>
    <artifactId>microservicecloud</artifactId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>
  <!-- 当前Module我自己叫什么名字 -->
  <artifactId>microservicecloud-api</artifactId>
  <dependencies><!-- 当前Module需要用到的jar包，按自己需求添加，如果父类已经包含了，可以不用写版本号 -->
   <dependency>
     <groupId>org.projectlombok</groupId>
     <artifactId>lombok</artifactId>
   </dependency>
  </dependencies>
</project>

新建部门Entity且配合lombok使用

package com.atguigu.springcloud.entities;

import java.io.Serializable;

import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.experimental.Accessors;

@SuppressWarnings("serial")
@NoArgsConstructor
@Data
@Accessors(chain=true)
public class Dept implements Serializable //必须序列化
{
  private Long  deptno;   //主键
  private String  dname;   //部门名称
  private String  db_source;//来自那个数据库，因为微服务架构可以一个服务对应一个数据库，同一个信息被存储到不同数据库

  public Dept(String dname)
  {
   super();
   this.dname = dname;
  }
}

右键microservicecloud-api选择Run as ,先mvn clean 后maven install后给其它模块引用，达到通用目的。

也即需要用到部门实体的话，不用每个工程都定义一份，直接引用本模块即可。

1.3、microservicecloud-provider-dept-8001微服务提供者Module

1、新建microservicecloud-provider-dept-8001 提供者Module,同理

2、pom.xml

<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>
  <parent>
    <groupId>com.jiatp.springcloud</groupId>
    <artifactId>microservicecloud</artifactId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>
  <artifactId>microservicecloud-provider-dept-8001</artifactId>

  <dependencies>
   <dependency><!-- 引入自己定义的api通用包，可以使用Dept部门Entity -->
     <groupId>com.jiatp.springcloud</groupId>
     <artifactId>microservicecloud-api</artifactId>
     <version>${project.version}</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>
   <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-jetty</artifactId>
   </dependency>
   <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>
   </dependency>
   <!-- 修改后立即生效，热部署 -->
   <dependency>
     <groupId>org.springframework</groupId>
     <artifactId>springloaded</artifactId>
     <version>1.2.6.RELEASE</version>
   </dependency>
   <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-devtools</artifactId>
   </dependency>
  </dependencies>
</project>

3、application.yml

server:
  port: 8001

mybatis:
  config-location: classpath:mybatis/mybatis.cfg.xml  # mybatis配置文件所在路径
  type-aliases-package: com.jiatp.springcloud.entity  # 扫描此包下的entity ->所有entity别名类所在包
  mapper-locations:
  - classpath:mybatis/mapper/**/*.xml                 # mapper映射文件

spring:
  application:
    name: microservicecloud-dept                      # 很重要，对外暴露的微服务名字
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource      # 数据源类型
    driver-class-name: org.gjt.mm.mysql.Driver        # 数据库驱动包
    url: jdbc:mysql://localhost:3306/cloudDB01?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone = GMT
    username: root
    password: 123456
    dbcp2:
      min-idle: 5                                     # 数据库连接池的最小维持连接数
      initial-size: 5                                 # 初始化连接数
      max-idle: 5                                     # 最大连接数

4、工程src/main/resources目录下新建mybatis文件夹后新建mybatis.cfg.xml文件

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<settings>
    <setting name="cacheEnabled" value="true"/><!-- 二级缓存开启 -->
</settings>
    </configuration>

4、创建cloudDB01 数据库，新建dept表并且插入数据

5、编写DeptMapper接口

package com.jiatp.springcloud.dao;

import java.util.List;

import org.apache.ibatis.annotations.Mapper;

import com.jiatp.springcloud.entity.Dept;

@Mapper
public interface DeptDao {
	public boolean addDept(Dept dept);

	public Dept findById(Long id);

	public List<Dept> findAll();
}

6、工程src/main/resources/mybatis目录下新建mapper文件夹后再建DeptMapper.xml

注意：这里如果采用注解方式，可以直接在DeptMapper接口上直接写sql语句

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.jiatp.springcloud.dao.DeptDao">
 <select id="findById" resultType="Dept" parameterType="Long">
   select deptno,dname,db_source from dept where deptno=#{deptno};
  </select>
  <select id="findAll" resultType="Dept">
   select deptno,dname,db_source from dept;
  </select>
  <insert id="addDept" parameterType="Dept">
   INSERT INTO dept(dname,db_source) VALUES(#{dname},DATABASE());
  </insert>
</mapper>

7、DeptService和DeptServiceImpl部门服务接口和实现类

package com.jiatp.springcloud.service;

import java.util.List;

import com.jiatp.springcloud.entity.Dept;

public interface DeptService {
	public boolean add(Dept dept);
	public Dept get(Long id);
	public List<Dept> list();
}
//---------------------------------------------
package com.jiatp.springcloud.service.impl;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.jiatp.springcloud.dao.DeptDao;
import com.jiatp.springcloud.entity.Dept;
import com.jiatp.springcloud.service.DeptService;

@Service
public class DeptServiceImpl implements DeptService{

	@Autowired
	private DeptDao deptdao;

	@Override
	public boolean add(Dept dept) {
		// TODO Auto-generated method stub
		return deptdao.addDept(dept);
	}

	@Override
	public Dept get(Long id) {
		// TODO Auto-generated method stub
		return deptdao.findById(id);
	}

	@Override
	public List<Dept> list() {
		// TODO Auto-generated method stub
		return deptdao.findAll();
	}

}

8、编写controller

@RestController
public class DeptController
{
  @Autowired
  private DeptService service;

  @RequestMapping(value="/dept/add",method=RequestMethod.POST)
  public boolean add(@RequestBody Dept dept)
  {
   return service.add(dept);
  }

  @RequestMapping(value="/dept/get/{id}",method=RequestMethod.GET)
  public Dept get(@PathVariable("id") Long id)
  {
   return service.get(id);
  }

  @RequestMapping(value="/dept/list",method=RequestMethod.GET)
  public List<Dept> list()
  {
   return service.list();
  }

}

9、编写DeptProvider8001_App主启动类

@SpringBootApplication
public class DeptProvider8001_App
{
  public static void main(String[] args)
  {
   SpringApplication.run(DeptProvider8001_App.class, args);
  }
}

测试：http://localhost:8001/dept/get/2

1.4、microservicecloud-consumer-dept-80部门微服务消费者Module

1、新建microservicecloud-consumer-dept-80，同理

2、pom.xml

<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>
  <parent>
    <groupId>com.jiatp.springcloud</groupId>
    <artifactId>microservicecloud</artifactId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>
  <artifactId>microservicecloud-consumer-dept-80</artifactId>
  <description>部门微服务消费者</description>

  <dependencies>
   <dependency><!-- 自己定义的api -->
     <groupId>com.jiatp.springcloud</groupId>
     <artifactId>microservicecloud-api</artifactId>
     <version>${project.version}</version>
   </dependency>
   <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-web</artifactId>
   </dependency>
   <!-- 修改后立即生效，热部署 -->
  <dependency>
     <groupId>org.springframework</groupId>
     <artifactId>springloaded</artifactId>
     <version>1.2.6.RELEASE</version>
   </dependency>
   <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-devtools</artifactId>
   </dependency>
  </dependencies>
</project>

3、yml配置

server:
  port: 80

4、com.jiatp.springcloud包下ConfigBean的编写

类似spring里面的applicationContext.xml写入的注入Bean

@Configuration
public class ConfigBean {  //优化spring,从spring(applicationContext.xml)== @Configuration配置 

	@Bean
	@LoadBalanced    //开启负载均衡
    public RestTemplate restTemplate(){

        return new RestTemplate();
    }

RestTemplate提供了多种便捷访问远程Http服务的方法， 是一种简单便捷的访问restful服务模板类，是Spring提供的用于访问Rest服务的客户端模板工具集。 用法：使用restTemplate访问restful接口非常的简单粗暴无脑。

(url, requestMap, ResponseBean.class)这三个参数分别代表

REST请求地址、请求参数、HTTP响应转换被转换成的对象类型。

5、controller编写

@RestController
public class DeptController_Consumer
{
    private static final String REST_URL_PREFIX = "http://localhost:8001";

    @Autowired
    private RestTemplate restTemplate;

    @RequestMapping(value="/consumer/dept/add")
    public boolean add(Dept dept)
    {
         return restTemplate.postForObject(REST_URL_PREFIX+"/dept/add", dept, Boolean.class);
    }

    @RequestMapping(value="/consumer/dept/get/{id}")
    public Dept get(@PathVariable("id") Long id)
    {
         return restTemplate.getForObject(REST_URL_PREFIX+"/dept/get/"+id, Dept.class);
    }

    @SuppressWarnings("unchecked")
    @RequestMapping(value="/consumer/dept/list")
    public List<Dept> list()
    {
         return restTemplate.getForObject(REST_URL_PREFIX+"/dept/list", List.class);
    }
}

6、DeptConsumer80_App主启动类

@SpringBootApplication
public class DeptConsumer80_App
{
  public static void main(String[] args)
  {
   SpringApplication.run(DeptConsumer80_App.class, args);
  }
}

测试：http://localhost/consumer/dept/list