搭建springcloud的demo之Rest微服务构建案例工程模块(一)

た入场券 2022-03-12 06:12 307阅读 0赞

**开发环境:Eclipse+JDK1.8**

## 1.Rest微服务构建案例工程模块 ##

**1.1先创建一个父工程 microservicecloud**  
1.1.1创建一个Maven Project父工程  
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**注意:父工程的Packaging 必须是pom!!!**  
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**父工程的pon.xml**  
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**父工程的pom.xml源码**

<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.yt.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>1.16.18</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>
      
      
    </project>

**1.2.创建第一个公共子工程microservicecloud-api(主要放一些公共的)**  
**在上面的microservicecloud的项目上面new**  
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**子工程是Maven Module**  
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**子工程是Packaging是jar**  
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**子工程的pom.xml**  
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**子工程的pom.xml源码**

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**子工程创建一个实体类Dept.java**  
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**子工程创建一个实体类Dept.java的源码**

package com.yt.springcloud.entity;
    
    import java.io.Serializable;
    
    import lombok.AllArgsConstructor;
    import lombok.Data;
    import lombok.NoArgsConstructor;
    import lombok.experimental.Accessors;
    
    @SuppressWarnings("serial")
    @AllArgsConstructor//全参构造函数
    @NoArgsConstructor//无参构造函数
    @Data//生成set,get
    @Accessors(chain=true)//链式风格访问
    public class Dept  implements Serializable{//微服务必须要实现序列化接口
    	
    	private Long deptNo;//主键
    	private String dName;//部门名称
    	private String db_source;//来自哪个数据库,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
    }

**microservicecloud-api 项目 先 maven clean 再maven install 打成jar包在本地maven库,可以给其他项目来使用**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l1YW50aW5nXw_size_16_color_FFFFFF_t_70 10]  
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**1.3.创建第二个子工程microservicecloud-provider-dept-8001(部门微服务提供者Module)**  
**创建一个Maven Module**  
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**编写microservicecloud-provider-dept-8001的pom.xml配置文件**  
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<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.yt.springcloud</groupId>
        <artifactId>microservicecloud</artifactId>
        <version>0.0.1-SNAPSHOT</version>
      </parent>
      
      <artifactId>microservicecloud-provider-dept-8001</artifactId>
      
      <dependencies>
      
      
      	<dependency>
      		<groupId>com.yt.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>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>
      	
      	
      	 
      	<dependency>
      		<groupId>org.springframework</groupId>
      		<artifactId>springloaded</artifactId>
      	</dependency>
      	<dependency>
      		<groupId>org.springframework.boot</groupId>
      		<artifactId>spring-boot-devtools</artifactId>
      	</dependency>
      	
      </dependencies>
      
    </project>

**创建一个application.yml**  
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server:
      port: 8001                                         # 当前微服务的端口
      
    mybatis:
      config-location: classpath:mybatis/mybatis.cfg.xml # mybatis配置文件所在路径
      type-aliases-package: com.yt.springcloud.entity    # 所有饿entity实体类所在包
      mapper-locations:
      - classpath:mybatis/mapper/**/*.xml                # mapper映射文件
    
    spring:
      application:
       name: microservicecloud-dept                      # 对外暴露的微服务的名字(很重要)
      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: hannong
       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

**创建一个myabtis的文件夹**  
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**创建一个myabtis.cfg.xml(mybatis的配置文件)**  
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<?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"/>
    	</settings>
    			
    </configuration>

**创建数据库cloudDB01以及dept表**  
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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 ('财务部',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;

**创建一个DeptDao.java**  
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package com.yt.springcloud.dao;
    
    import java.util.List;
    
    import org.apache.ibatis.annotations.Mapper;
    
    import com.yt.springcloud.entity.Dept;
    
    @Mapper
    public interface DeptDao {
    	
    	public boolean addDept(Dept dept);
    	
    	public Dept findById(Long id);
    	
    	public List<Dept> findAll();
    	
    
    }

**创建一个DeptMapper.xml**  
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<?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.yt.springcloud.dao.DeptDao">
    
    		<select id="findById" resultType="Dept" parameterType="Long">
    			select deptno,dname,db_source from dept where deptno=#{deptno} 
    		</select>
    		
    		<select id="findAll"  parameterType="Long">
    			select deptno,dname,db_source from dept 
    		</select>
    		
    		<insert id="addDept"  parameterType="Long">
    			insert into dept(dname,db_source) values(#{dname},database())
    		</insert>
    </mapper>

**创建一个IDeptService.java接口**  
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package com.yt.springcloud.service;
    
    import java.util.List;
    
    import com.yt.springcloud.entity.Dept;
    //业务层接口
    public interface IDeptService {
    	
    	public boolean add(Dept dept);
    	
    	public Dept get(Long id);
    	
    	public List<Dept> list();
     
    }

**创建一个DeptService.java实现类**  
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package com.yt.springcloud.service.impl;
    
    import java.util.List;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
    
    import com.yt.springcloud.dao.DeptDao;
    import com.yt.springcloud.entity.Dept;
    import com.yt.springcloud.service.IDeptService ;
    //业务逻辑层的实现类
    @Service
    public class DeptService implements IDeptService {
    	
    	@Autowired
    	private DeptDao deptDao;
    
    	@Override
    	public boolean add(Dept dept) {
    		return deptDao.addDept(dept);
    	}
    
    	@Override
    	public Dept get(Long id) {
    		return deptDao.findById(id);
    	}
    
    	@Override
    	public List<Dept> list() {
    		return deptDao.findAll();
    	}
    
    }

**创建一个DeptController.java接口**  
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package com.yt.springcloud.controller;
    
    import java.util.List;
    
    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.RequestMethod;
    import org.springframework.web.bind.annotation.RestController;
    
    import com.yt.springcloud.entity.Dept;
    import com.yt.springcloud.service.impl.DeptService;
    
    @RestController//整合了responceBody+Controller
    public class DeptController {
    	
    	@Autowired
    	private DeptService deptService;
    	
    	@RequestMapping(value="/dept/add",method=RequestMethod.POST)
    	public boolean add(@RequestBody Dept dept) {
    		return deptService.add(dept);
    	}
    	
    	@RequestMapping(value="/dept/get/{id}",method=RequestMethod.GET)
    	public Dept get(@PathVariable("id") Long id) {
    		return deptService.get(id);
    	}
    	
    	@RequestMapping(value="/dept/list",method=RequestMethod.GET)
    	public List<Dept> list() {
    		return deptService.list();
    	}
    	
    }

**启动项目测试一下 : run as -->Spring Boot App**  
测试路径 : [http://localhost:8001/dept/get/2][http_localhost_8001_dept_get_2]  
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测试路径 : [http://localhost:8001/dept/list][http_localhost_8001_dept_list]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l1YW50aW5nXw_size_16_color_FFFFFF_t_70 24]  
**1.4.创建一个项目子工程microservicecloud-consumer-dept-80(部门微服务消费者Module)**  
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**添加pom.xml的依赖**  
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**配置application.yml文件**  
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server :
       port: 80

**创建一个ConfigBean.java**  
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package com.yt.springcloud.cfgbeans;
    
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.web.client.RestTemplate;
    
    @Configuration//其实就是ApplicationContext.xml
    public class ConfigBean {
    	
    	/**
    	 * 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
    	 * @return
    	 */
    	@Bean
    	public RestTemplate getRestTemplate() {
    		return new RestTemplate();
    	}
    
    }

**创建一个DeptController\_consumer.java**  
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package com.yt.springcloud.controller;
    
    import java.util.List;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    import org.springframework.web.client.RestTemplate;
    
    import com.yt.springcloud.entity.Dept;
    
    @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);
    	}
    	
    	@SuppressWarnings("unchecked")
    	@RequestMapping(value="/consumer/dept/list")
    	public List<Dept> list(Dept dept) {
    		return restTemplate.getForObject(REST_URL_PREFIX+"/dept/list", List.class);
    	}
    	
    
    }

**创建一个DeptConsumer80\_App.java启动类**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l1YW50aW5nXw_size_16_color_FFFFFF_t_70 30]

package com.yt.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);
    	}
    
    }

**注意:要先启动提供者工程,再消费者工程两个项目**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l1YW50aW5nXw_size_16_color_FFFFFF_t_70 31]  
**注意:调用路径 [http://localhost/consumer/dept/get/2][http_localhost_consumer_dept_get_2]**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l1YW50aW5nXw_size_16_color_FFFFFF_t_70 32]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l1YW50aW5nXw_size_16_color_FFFFFF_t_70 33]

## 总结 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l1YW50aW5nXw_size_16_color_FFFFFF_t_70 34]

翻译于尚硅谷周阳老师:[https://www.bilibili.com/video/av22613028?from=search&seid=11377756339718254280][https_www.bilibili.com_video_av22613028_from_search_seid_11377756339718254280]

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[http_localhost_8001_dept_get_2]: http://localhost:8001/dept/get/2
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l1YW50aW5nXw_size_16_color_FFFFFF_t_70 23]: /images/20220312/884d38a6a3e34e83957d8b9bb2d246db.png
[http_localhost_8001_dept_list]: http://localhost:8001/dept/list
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[http_localhost_consumer_dept_get_2]: http://localhost/consumer/dept/get/2
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[https_www.bilibili.com_video_av22613028_from_search_seid_11377756339718254280]: https://www.bilibili.com/video/av22613028?from=search&seid=11377756339718254280