SpringCloud--微服务架构简单案例

灰太狼 2021-08-26 15:08 465阅读 0赞

### 构建父工程（microservicecloud） ###

引入依赖：

<?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>pers.zhang</groupId>
        <artifactId>microservicecloud</artifactId>
        <version>1.0-SNAPSHOT</version>
        <modules>
            <module>microservicecloud-api</module>
            <module>microservicecloud-provider-dept-8001</module>
            <module>microservicecloud-consumer-dept-80</module>
        </modules>
        <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.bersion>1.16.18</lombok.bersion>
        </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>5.1.6</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>1.3.2</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>

### 创建公共子模块（microservicecloud-api） ###

引入依赖：

部门实体类：

@AllArgsConstructor
    @NoArgsConstructor
    @Data
    @Accessors(chain = true)
    public class Dept implements Serializable { 
    
        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
    
    
    }

### 创建provider子模块（microservicecloud-provider-dept-8001） ###

引入依赖：

<?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>pers.zhang</groupId>
            <version>1.0-SNAPSHOT</version>
        </parent>
        <modelVersion>4.0.0</modelVersion>
    
        <artifactId>microservicecloud-provider-dept-8001</artifactId>
    
        <dependencies>
            <dependency>
                <groupId>pers.zhang</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>
            
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>springloaded</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-devtools</artifactId>
            </dependency>
        </dependencies>
    
    </project>

application.yml配置：

server:
      port: 8001
    
    mybatis:
      config-location: classpath:mybatis/mybatis.cfg.xml  # mybatis 配置文件所在路径
      type-aliases-package: pers.zhang.entities           # 别名扫描包
      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: 123456
        dbcp2:
          min-idle: 5     # 连接池最小维持连接数
          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

dao:

@Mapper
    public interface DeptDao { 
    
        boolean addDept(Dept dept);
    
        Dept findById(Long id);
    
        List<Dept> findAll();
    }

mapper:

<?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="pers.zhang.dao.DeptDao">
    
        <select id="findById" resultType="pers.zhang.entities.Dept">
            SELECT deptno, dname, db_source
            FROM dept
            WHERE deptno = #{deptno}
        </select>
    
        <select id="findAll" resultType="pers.zhang.entities.Dept">
            SELECT deptno, dname, db_source
            FROM dept
        </select>
    
        <insert id="addDept" parameterType="pers.zhang.entities.Dept">
            INSERT INTO dept(dname, db_source)
            VALUES (#{dname}, DATABASE())
        </insert>
    
    </mapper>

service:

public interface DeptService { 
    
        boolean add(Dept dept);
    
        Dept get(Long id);
    
        List<Dept> list();
    }

@Service
    public class DeptServiceImpl implements DeptService { 
    
        @Autowired
        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();
        }
    }

controller:

@RestController
    public class DeptController { 
    
        @Autowired
        DeptService deptService;
    
        @RequestMapping(value = "/dept/add", method = RequestMethod.POST)
        public boolean add(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();
        }
    
    }

启动类：

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

### 创建consumer子模块（microservicecloud-consumer-dept-80） ###

引入依赖：

配置：

server:
      port: 80

配置RestTemplate：

@Configuration
    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 url：REST请求地址 requestMap：请求参数 ResponseBean.class：HTTP响应转换被转换成的对象类型 */
        @Bean
        public RestTemplate getRestTemplate(){ 
            return new RestTemplate();
        }
    
    }

controller:

@RestController
    public class DeptController_Consumer { 
    
        private static final String REST_RUL_PREFIX = "http://localhost:8001";
    
        @Autowired
        RestTemplate restTemplate;
    
        @RequestMapping(value = "/consumer/dept/add")
        public boolean add(Dept dept){ 
            return restTemplate.postForObject(REST_RUL_PREFIX + "/dept/add", dept, Boolean.class);
        }
    
        @RequestMapping(value = "/consumer/dept/get/{id}")
        public Dept get(@PathVariable("id") Long id){ 
            return restTemplate.getForObject(REST_RUL_PREFIX + "/dept/get/" + id, Dept.class);
        }
    
        @RequestMapping(value = "consumer/dept/list")
        public List<Dept> list(){ 
            return restTemplate.getForObject(REST_RUL_PREFIX + "/dept/list", List.class);
        }
    }

启动类:

@SpringBootApplication
    public class DeptCondumer80_App { 
    
        public static void main(String[] args) { 
            SpringApplication.run(DeptCondumer80_App.class, args);
        }
    }

### 测试 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NvbGRfX19wbGF5_size_16_color_FFFFFF_t_70]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NvbGRfX19wbGF5_size_16_color_FFFFFF_t_70 1]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NvbGRfX19wbGF5_size_16_color_FFFFFF_t_70]: /images/20210813/03b8ef62f8104d91a268b7eedab2b996.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NvbGRfX19wbGF5_size_16_color_FFFFFF_t_70 1]: /images/20210813/21f741508bd244f78a398c6c69f05b9c.png