SpringCloud学习之二构建案例工程模块

4.Rest微服务构建案例工程模块

4.1 总体介绍

l  承接着我们的spirngmvc+mybatis+mysql初级高级课程，以Dept部门模块做一个微服务通用案例Consumer消费者（Client）通过REST调用Provider提供者（Server）提供的服务

n  已经学习过的知识springmvc

n  已经学习过的知识mybaits

l  Maven的分包分模块架构复习

一个简单的Maven模块结构是这样的：

----- app-parent 一个父项目（app-parent）聚合很多子项目（app-util,app-dao,app-service,app-web）

         |----- pom.xml(pom)

         |

         |---------- app-util           

||---------- pom.xml(jar)

|

         |---------- app-dao         

||---------- pom.xml(jar)

|

         |---------- app-service            

||---------- pom.xml(jar)

|

         |---------- app-web                 

||---------- pom.xml(war)

 

 

 

l  直接动手干

n  Maven的分包分模块架构复习

一个Project带着多个Module子模块

MicroServiceCloud父工程（Project）下次次带着3个子模块（Module）

microservicecloud-api 

         封装的整体entity/接口/公共配置等

microservicecloud-provider-dept-8001

         微服务落地的服务提供

microservicecloud-consumer-dept-80

         微服务调用的客户端使用

         80端口

80端口是为HTTP（HyperText Transport Protocol）即超传输协议开放的

此为上网冲浪使用次数最多的协议，主要用于WWW(World Wide Web)即万维网传输信息的协议

可以通过HTTP地址（即常说的“网址”）加“：80”来访问网站，

因为浏览网页服务默认的端口号都是80，因此只需输入网址即可，不用输入“：80”了。

 

1 父工程

1.1  api公共模块

1.2  GAV

1.3  GAV

1.4  GAV

…….

Dept.java.Entity

4.2 本次springCloud版本

Dalston.SR1

1.5.9.RELEASE

4.3 构建步骤

microservicecloud整体工程Project

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

 

l  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

         POM

<?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/4.0.0http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.atguigu.springcloud</groupId>
    <artifactId>microservicecloud</artifactId>
    <version>1.0-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>1.16.18</lombok.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Dalston.SR1</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>1.5.9.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>1.0.31</version>
            </dependency>
            <dependency>
                <groupId>org.mybatis.spring.boot</groupId>
                <artifactId>mybatis-spring-boot-starter</artifactId>
                <version>1.3.0</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>
   
    <modules>
        <module>microservicecloud-api</module>
    </modules>

</project>

microservicecloud-api公共子模块Module

l  新建microservicecloud-api

l  修改POM

         约定 > 配置 >  编码

<?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/4.0.0http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <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.atguigu.springcloud</groupId>
        <artifactId>microservicecloud</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>microservicecloud-api</artifactId><!-- 当前Module我自己叫什么名字 -->

    <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>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-feign</artifactId>
        </dependency>
    </dependencies>

</project>

 

l  新建Entity且配合lombok使用

 

package com.atguigu.springcloud.entities;

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

import java.io.Serializable;

//@AllArgsConstructor   //全参构造函数
@NoArgsConstructor    //空参构造函数
@Data
@Accessors(chain = true)   //链式风格访问
public class Dept implements Serializable { //Dept(Entity) orm mysql->Dept(table) 类表关系映射  必需实现序列化
    private Integer 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;
    }
}

l  Mvn clean install后给其它模块引用，达到通用目。

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

microservicecloud-provider-dept-8001部门微服务提供者Module

l  新建microservicecloud-provider-dept-8001

l  POM

l  <?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>microservicecloud</artifactId>
        <groupId>com.atguigu.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

   <artifactId>microservicecloud-provider-dept-8001</artifactId>

    <dependencies>
        <!-- 引入自己定义的api通用包，可以使用Dept部门Entity-->
        <dependency>
            <groupId>com.atguigu.springcloud</groupId>
            <artifactId>microservicecloud-api</artifactId>
            <version>${project.version}</version>
        </dependency>
        <!-- actuator监控信息完善 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
        </dependency>
        <!-- mysql驱动包 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <!-- 连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
        </dependency>
        <!-- 日志 -->
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-core</artifactId>
        </dependency>
        <!-- mybatis的整合 -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
        </dependency>
        <!-- boot的jetty 内置tomcat插件-->
        <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>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
    </dependencies>
</project>

 

l  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.atguigu.springcloud.entities    # 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
   datasource:
    type: com.alibaba.druid.pool.DruidDataSource            # 当前数据源操作类型
    driver-class-name: org.gjt.mm.mysql.Driver              # mysql驱动包
    url: jdbc:mysql://localhost:3306/cloudDB01              # 数据库名称
    username: root
    password: kashowres
    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-total: 5                                          # 最大连接数
      max-wait-millis: 200                                  # 等待连接获取的最大超时时间

 

l  MySQL创建部门数据库脚本

DROP DATABASE IF EXISTS cloudDB01;

CREATE DATABASE cloudDB01 CHARACTER SET UTF8;

USE cloudDB01;

CREATE TABLE dept

(

         deptno BIGINT NOT NULL PRIMARY KEY AUTO_INCREMENT,

         dname VARCHAR(60),

         db_source VARCHAR(60)

);

 

INSERT INTO dept(dname,db_source) VALUES('开发部',DATABASE());

INSERT INTO dept(dname,db_source) VALUES('人事部',DATABASE());

INSERT INTO dept(dname,db_source) VALUES('账务部',DATABASE());

INSERT INTO dept(dname,db_source) VALUES('市场部',DATABASE());

INSERT INTO dept(dname,db_source) VALUES('运维部',DATABASE());

 

SELECT * FROM dept;

l  DeptDao部门接口

package com.atguigu.springcloud.dao;

import com.atguigu.springcloud.entities.Dept;
import org.apache.ibatis.annotations.Mapper;

import java.util.List;

@Mapper
public interface DeptDao {
    public boolean addDept(Deptdept);

    public DeptfindById(Longid);

    public List<Dept>findAll();
}

 

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

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC"-//mybatis.org//DTD Mapper3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.atguigu.springcloud.dao.DeptDao">

   <select id="findById" resultType="Dept" parameterType="Long">
      select deptno,dname,db_source from dept wheredeptno=#{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>
 

 

l  DeptService部门服务接口

package com.atguigu.springcloud.service;

import com.atguigu.springcloud.entities.Dept;

import java.util.List;

public interface DeptService {
    public boolean addDept(Deptdept);

    public Deptget(Longid);

    public List<Dept>list();
}

 

l  DeptServiceImpl部门服务接口实现类

package com.atguigu.springcloud.service.impl;

import com.atguigu.springcloud.dao.DeptDao;
import com.atguigu.springcloud.entities.Dept;
import com.atguigu.springcloud.service.DeptService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class DeptServiceImpl implementsDeptService {

    @Autowired
    private DeptDaodeptDao;

    @Override
    public boolean addDept(Deptdept) {
        deptDao.addDept(dept);
        return false;
    }

    @Override
    public Deptget(Longid) {
        return deptDao.findById(id);
    }

    @Override
    public List<Dept>list() {
        return deptDao.findAll();
    }
}

l  DeptController部门微服务提供者REST

package com.atguigu.springcloud.controller;

import com.atguigu.springcloud.entities.Dept;
import com.atguigu.springcloud.service.DeptService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
public class DeptController {
    @Autowired
    private DeptServicedeptService;

    @RequestMapping(value = "/dept/add",method = RequestMethod.POST)
    public boolean add(@RequestBodyDept dept){
        return deptService.addDept(dept);
    }

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

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

 

DeptProvider8001_App主启动类DeptProvider8001_App

package com.atguigu.springcloud;

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

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

 

l  测试

启动DeptProvider8001_App

 

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

l  新建microservicecloud-consumer-dept-80

l  POM

<?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/4.0.0http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>microservicecloud</artifactId>
        <groupId>com.atguigu.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <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.atguigu.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>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
    </dependencies>

</project>

l  YML

server:
  port: 80

 

l  com.atguigu.springcloud.cfgbeans包下ConfigBean的编写（类似spring里面的applicationContext.xml写入Bean）

 

RestTemplate

代码

 

package com.atguigu.springcloud.cfgbeans;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;

@Configuration
public class ConfigBean {   //boot  -->spring  applicationContext.xml  --- @Configuration配置  ConfigBean = applicationContext.xml
    @Bean
    public RestTemplate getRestTemplate(){
        return new RestTemplate();
    }
}
/*@Bean
    public UserService getUseService(){
        return new UserServiceImpl();
    }*/
//applicationContext.xml  == ConfigBean(@Configuration)
//<bean id="userService" class="com.atguigu.tmall.UserServiceImpl">

 

l  com.atguigu.springcloud.controller包下新建DeptController_Consumer部门微服务消费者REST

n  RestTemplate

JDBC             spring               JDBCTemplate

redis                      spring               redisTemplate

结果             spring               RestTemplate

是什么

RestTemplate提供了多种便捷访问远程Http服务的方法

是一种简便捷的访问restful服务模版，是Spring提供的用于访问Rest服务的客户端模板工具集

 

官网及使用

 

官网地址

https://docs.spring.io/spring-framework/docs/4.3.7.RELEASE/javadoc-api/org/springframework/web/client/RestTemplate.html

使用

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。

package com.atguigu.springcloud.controller;

import com.atguigu.springcloud.entities.Dept;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import java.util.List;

@RestController
public class DeptController_Consumer {

    private static final String REST_URL_PREFIX = "http://localhost:8001";

    /*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。*/

    @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);
    }

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

l  DeptConsumer80_App主启动类

package com.atguigu.springcloud;

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

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

l  测试

http://localhost/consumer/dept/get/2

http://localhost/consumer/dept/list

http://localhost/consumer/dept/add?dname=AI