SpringCloud学习之基础环境搭建

前提：SpringBoot可以离开SpringCloud独立使用开发项目，但是SpringCloud离不开SpringBoot，属于依赖的关系.

　　所以此处搭建一个基础的SpringBoot 多模块的项目

一：创建父模块

　　1.创建一个maven项目，填写groupid和artifactId，并修改packing为pom

　　2. 添加相应的依赖

<?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>com.ligong.springcloud</groupId>
    <artifactId>microservicecloud</artifactId>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>microservicecloud-api</module>
        <module>microservicecloud-provider</module>
    </modules>
    <packaging>pom</packaging>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.compiler.source>1.8</project.compiler.source>
        <project.compiler.target>1.8</project.compiler.target>
        <junit.verion>4.12</junit.verion>
        <log4j.version>1.2.17</log4j.version>
        <lombok.version>1.6.18</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>2.1.3.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.47</version>
            </dependency>
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid</artifactId>
                <version>1.1.15</version>
            </dependency>
            <dependency>
                <groupId>org.mybatis.spring.boot</groupId>
                <artifactId>mybatis-spring-boot-starter</artifactId>
                <version>1.3.3</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>${junit.verion}</version>
                <scope>test</scope>
            </dependency>
            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>${log4j.version}</version>
            </dependency>
        </dependencies>
    </dependencyManagement>
</project>

二：创建子模块

　　1.新建microservicecloud-api子模块

　　　　在父工程下右键new->Module 创建一个子模块，这里选择maven/Spring initializr都可以

　　　　此处我采用的是maven创建，填写artifactId finish即可

　　　microservicecloud-api的pom文件，注意，打包方式为jar

<?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.ligong.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <packaging>jar</packaging>
    <artifactId>microservicecloud-api</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.9.8</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>javax.persistence</groupId>
            <artifactId>javax.persistence-api</artifactId>
            <version>2.2</version>
        </dependency>
    </dependencies>
</project>

　　在api子模块下新建一个entities包，创建一个dept class。

　　此处采用jpa作为持久层，所以api的pom文件中需要导入相关jpa的依赖

@Data
@Entity
@Table(name = "t_dept")
@NoArgsConstructor
@AllArgsConstructor
@JsonIgnoreProperties(value={"hibernateLazyInitializer","handler", "fieldHandler"})
@Accessors(chain = true)
public class Dept implements Serializable {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer deptNo;
    @Column(name = "d_name")
    private String deptName;
    /**
     * 来源于哪个数据库
     */
    @Column(name = "db_source")
    private String dbSource;
}

　　2.创建provider子模块，用于对外提供服务。

　　创建过程与上面类似，就不在赘述

　　provider的pom文件，注意打包方式为war

<?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.ligong.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <packaging>war</packaging>

    <artifactId>microservicecloud-provider</artifactId>
    <dependencies>
        <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>
        <!--热部署-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>springloaded</artifactId>
            <version>1.2.8.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <version>2.1.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>com.ligong.springcloud</groupId>
            <artifactId>microservicecloud-api</artifactId>
            <version>1.0-SNAPSHOT</version>
            <!--<scope>compile</scope>-->
        </dependency>
    </dependencies>
</project>

　　1. 创建DeptRepository

@Repository
public interface DeptRepository extends JpaRepository<Dept,Integer> {

}

　　2. 创建DeptService

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

　　3. 创建DeptServiceImpl

@Service
@Slf4j
public class DeptServiceImpl implements DeptService {

    @Autowired
    private DeptRepository deptRepository;

    public Dept get(Integer id){
        return deptRepository.getOne(id);
    }
    public boolean add(Dept dept){
        try{
            deptRepository.save(dept);
        }catch (Exception e){
            log.error("添加dept 失败!"+e.getMessage());
            TransactionAspectSupport.currentTransactionStatus().setRollbackOnly();
            return false;
        }
        return true;
    }

    public List<Dept> list(){
        return deptRepository.findAll();
    }
}

　　4. 创建DeptController，(定义rest风格的请求方式)

　　　　ps:

@RestController
public class DeptController {
    @Autowired
    private DeptService deptService;
    @PostMapping("/dept")
    public boolean add(@RequestBody Dept dept){
        return deptService.add(dept);
    }
    @GetMapping("/dept/{id}")
    public Dept get(@PathVariable("id") Integer id){
        return deptService.get(id);
    }
    @GetMapping("/dept/list")
    public List<Dept> list(){
        return deptService.list();
    }
}

　　5. 定义SpringBoot启动类(如果采用Spring initializr创建的子module可以跳过)

@SpringBootApplication
public class DeptProvider8080App {
    public static void main(String[] args) {
        SpringApplication.run(DeptProvider8080App.class,args);
    }
}

　　6. 编写application.yml文件

server:
  port: 8080 #Server port
spring:
  application:
    name: microservercloud-dept
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource # alibaba 数据源
    driver-class-name: org.gjt.mm.mysql.Driver # mysql驱动
    url: jdbc:mysql://xx.xx.xx.xx:3306/cloudDB01 # jdbc url
    username: root 
    password: root
    dbcp2:
      min-idle: 5
      initial-size: 5
      max-total: 5
      max-wait-millis: 200
  jpa:
    hibernate:
      ddl-auto: update # create/update table
    properties:
      hibernate:
        format_sql: true #格式化sql
        enable_lazy_load_no_trans: true
        dislect: org.hibernate.dialect.MySQL5Dialect #定义mysql方言
    open-in-view: true
    show-sql: true #显示sql

三：测试环境搭建

　　运行SpringBoot启动类，查看启动状态

　　采用postman测试

　　　测试/dept 添加接口，body添加

　　　　测试/dept/{id}接口

　　　　最后/dept/list查看数据是否添加成功

　　至此，SpringCloud的基础环境搭建完毕！

SpringCloud学习之基础环境搭建

前提：SpringBoot可以离开SpringCloud独立使用开发项目，但是SpringCloud离不开SpringBoot，属于依赖的关系.

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