SpringCloud微服务实战——搭建企业级开发框架(五)(数据库持久化集成MySql+Druid+MyBatis-Plus)

??在引入相关数据库持久化相关依赖库之前,我们可以考虑到,当我们因业务开发需要,引入各种各样的依赖库时,Jar包冲突是我们必须面对的一个问题,Spring为了解决这些Jar包的冲突,推出了各种bom,最著名的就是Spring IO Platform bom,其中最核心的三个是:spring-framework-bom、spring-boot-dependencies、platform-bom。我们这里参考Spring管理Jar包的方式,新建一个GitEgg-Platform平台工程,提供各种第三方组件的配置及自定义方法,使用子工程gitegg-platform-bom统一管理GitEgg自定义方法扩展jar包及第三方Jar包版本。
1、首先在GitEgg-Platform工程下新建gitegg-platform-db用于管理系统需要用到的数据库驱动、数据库连接池的jar包及配置,新建gitegg-platform-mybatis用于管理系统需要用到的持久层框架,建好的结构如下:
SpringCloud微服务实战——搭建企业级开发框架(五)(数据库持久化集成MySql+Druid+MyBatis-Plus)
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2、修改GitEgg-Platform根目录下的pom.xml,设置工程编码方式,及引入的Spring Boot,Spring Cloud,gitegg-platform-bom版本:

4.0.0com.gitegg.platform GitEgg-Platform ${project.artifactId} 1.0-SNAPSHOTpom gitegg-platform-bom gitegg-platform-db gitegg-platform-mybatis 1.83.8.1UTF-8UTF-8UTF-82.3.3.RELEASEHoxton.SR8Cairo-SR8 com.gitegg.platform gitegg-platform-bom ${project.version} pom import org.springframework.boot spring-boot-dependencies ${spring.boot.version} pom import org.springframework.cloud spring-cloud-dependencies ${spring.cloud.version} pom import ${project.name} src/main/resources src/main/java **/*.xml org.apache.maven.plugins maven-compiler-plugin ${maven.plugin.version} ${java.version} ${java.version} UTF-8 -parameters aliyun-repos https://maven.aliyun.com/nexus/content/groups/public/false gitegg-release Release Repository https://packages.aliyun.com/maven/repository/2020515-release-dpxo1j/ aliyun-plugin https://maven.aliyun.com/nexus/content/groups/public/false devdev truetesttest propro

3、修改gitegg-platform-bom工程下的pom.xml,引入目前需要的数据库驱动,数据连接池及Mybatis-Plus:
org.springframework.boot spring-boot-starter-parent 2.3.3.RELEASE 4.0.0com.gitegg.platform gitegg-platform-bom ${project.artifactId} ${gitegg.project.version}pom1.83.8.1UTF-8UTF-8UTF-81.0-SNAPSHOT8.0.179.1-901.jdbc41.1.233.4.0 com.gitegg.platform gitegg-platform-db ${gitegg.project.version} com.gitegg.platform gitegg-platform-mybatis ${gitegg.project.version} mysql mysql-connector-java ${mysql.connector.version} postgresql postgresql ${postgresql.connector.version} com.alibaba druid-spring-boot-starter ${druid.version} com.baomidou mybatis-plus-boot-starter ${mybatis.plus.version}

4、修改gitegg-platform-db工程下的pom.xml,只引入数据库驱动及数据库连接池相关jar包:
GitEgg-Platform com.gitegg.platform 1.0-SNAPSHOT 4.0.0gitegg-platform-db ${project.artifactId} ${project.parent.version}jar mysql mysql-connector-java postgresql postgresql com.alibaba druid-spring-boot-starter

5、修改gitegg-platform-mybatis工程下的pom.xml,只引入mybatis-plus相关jar包:
GitEgg-Platform com.gitegg.platform 1.0-SNAPSHOT 4.0.0gitegg-platform-mybatis ${project.artifactId} ${project.parent.version}jar com.baomidou mybatis-plus-boot-starter

6、pom.xml文件配置好之后,在IDEA右侧窗口,Maven中点击install,将包安装到本地,这样GitEgg-Cloud工程就可以引用GitEgg-Platform工程的jar包了,同理,测试及正式环境需要点击deploy,将jar包发布到测试的Maven私服,或者正式环境的Maven私服。
SpringCloud微服务实战——搭建企业级开发框架(五)(数据库持久化集成MySql+Druid+MyBatis-Plus)
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SpringCloud微服务实战——搭建企业级开发框架(五)(数据库持久化集成MySql+Druid+MyBatis-Plus)
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7、回到GitEgg-Cloud项目,在gitegg-service下的pom.xml里面引入gitegg-platform-db和gitegg-platform-mybatis
GitEgg-Cloud com.gitegg.cloud 1.0-SNAPSHOT 4.0.0gitegg-servicepom gitegg-service-base gitegg-service-bigdata gitegg-service-system com.gitegg.platform gitegg-platform-db com.gitegg.platform gitegg-platform-mybatis org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-actuator

8、在gitegg-service-system工程下修改application.yml,增加数据库连接和mybatis的配置:
server: port: 8001 spring: application: name: gitegg-service-system datasource: type: com.alibaba.druid.pool.DruidDataSource driverClassName: com.mysql.jdbc.Driver url: jdbc:mysql://127.0.0.1/gitegg_cloud?zeroDateTimeBehavior=convertToNull&useUnicode=true&characterEncoding=utf8&allowMultiQueries=true&autoReconnect=true username: root password: root initialSize: 1 minIdle: 3 maxActive: 20 # 配置获取连接等待超时的时间 maxWait: 60000 # 配置间隔多久才进行一次检测,检测需要关闭的空闲连接,单位是毫秒 timeBetweenEvictionRunsMillis: 60000 # 配置一个连接在池中最小生存的时间,单位是毫秒 minEvictableIdleTimeMillis: 30000 validationQuery: select 'x' testWhileIdle: true testOnBorrow: false testOnReturn: false # 打开PSCache,并且指定每个连接上PSCache的大小 poolPreparedStatements: true maxPoolPreparedStatementPerConnectionSize: 20 # 配置监控统计拦截的filters,去掉后监控界面sql无法统计,'wall'用于防火墙 filters: config,stat,slf4j # 通过connectProperties属性来打开mergeSql功能;慢SQL记录 connectionProperties: druid.stat.mergeSql=true; druid.stat.slowSqlMillis=5000; # 合并多个DruidDataSource的监控数据 useGlobalDataSourceStat: true mybatis-plus: mapper-locations: classpath*:/com/gitegg/*/*/mapper/*Mapper.xml typeAliasesPackage: com.gitegg.*.*.entity global-config: #主键类型0:"数据库ID自增", 1:"用户输入ID",2:"全局唯一ID (数字类型唯一ID)", 3:"全局唯一ID UUID"; id-type: 2 #字段策略 0:"忽略判断",1:"非 NULL 判断"),2:"非空判断" field-strategy: 2 #驼峰下划线转换 db-column-underline: true #刷新mapper 调试神器 refresh-mapper: true #数据库大写下划线转换 #capital-mode: true #逻辑删除配置 logic-delete-value: 1 logic-not-delete-value: 0 configuration: map-underscore-to-camel-case: true cache-enabled: false

9、修改GitEggSystemApplication,添加要扫描的mapper路径声明:
package com.gitegg.service.system; import org.mybatis.spring.annotation.MapperScan; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; /** * gitegg-system 启动类 */ @MapperScan("com.gitegg.*.*.mapper") @SpringBootApplication public class GitEggSystemApplication {public static void main(String[] args) { SpringApplication.run(GitEggSystemApplication.class,args); }}

10、修改GitEgg-Platform工程中的gitegg-platform-db和gitegg-platform-mybatis,新增mybatis-plus分页配置,和Druid数据库连接配置,此配置类预留,后面需要自定义修改。
  • DruidConfig.java内容如下:
    package com.gitegg.platform.db.config; import org.springframework.context.annotation.Configuration; @Configuration public class DruidConfig {}

  • 【SpringCloud微服务实战——搭建企业级开发框架(五)(数据库持久化集成MySql+Druid+MyBatis-Plus)】MybatisPlusConfig.java内容如下:
    package com.gitegg.platform.mybatis.config; import com.baomidou.mybatisplus.annotation.DbType; import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor; import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor; import org.mybatis.spring.annotation.MapperScan; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; @Configuration @MapperScan("com.gitegg.**.mapper.**") public class MybatisPlusConfig {/** * 新的分页插件,一缓和二缓遵循mybatis的规则,需要设置 MybatisConfiguration#useDeprecatedExecutor = false * 避免缓存出现问题(该属性会在旧插件移除后一同移除) */ @Bean public MybatisPlusInterceptor mybatisPlusInterceptor() { MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor(); interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL)); return interceptor; }}

    11、增加测试类,通过访问controller->service->dao层,获取数据库数据。新建controller、service、impl、mapper、entity、dto包,这些包和类,后面可以用系统自动生成,不需要每次都自己手动建立。
  • SystemController.java文件内容:
    package com.gitegg.service.system.controller; import com.gitegg.service.system.service.ISystemService; import lombok.AllArgsConstructor; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; @RestController @RequestMapping(value = "https://www.it610.com/article/system") @AllArgsConstructor public class SystemController {private final ISystemService systemService; @GetMapping(value = "https://www.it610.com/article/list") public Object list() { return systemService.list(); }@GetMapping(value = "https://www.it610.com/article/page") public Object page() { return systemService.page(); } }

  • ISystemService.java文件内容:
    package com.gitegg.service.system.service; import com.baomidou.mybatisplus.extension.plugins.pagination.Page; import com.gitegg.service.system.entity.SystemTable; import java.util.List; public interface ISystemService {List list(); Page page(); }

  • SystemServiceImpl.java 内容:
    package com.gitegg.service.system.service.impl; import com.baomidou.mybatisplus.extension.plugins.pagination.Page; import com.gitegg.service.system.entity.SystemTable; import com.gitegg.service.system.mapper.SystemTableMapper; import com.gitegg.service.system.service.ISystemService; import lombok.AllArgsConstructor; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; /** * */ @Service @AllArgsConstructor public class SystemServiceImpl implements ISystemService {private final SystemTableMapper systemTableMapper; @Override public List list() { return systemTableMapper.list(); }@Override public Page page() { Page page = new Page<>(1, 10); List records = systemTableMapper.page(page); page.setRecords(records); return page; } }

  • SystemTableMapper.java内容:
    package com.gitegg.service.system.mapper; import com.baomidou.mybatisplus.extension.plugins.pagination.Page; import com.gitegg.service.system.entity.SystemTable; import org.apache.ibatis.annotations.Mapper; import java.util.List; @Mapper public interface SystemTableMapper {List list(); List page(Page page); }

  • SystemTable.java内容:
    package com.gitegg.service.system.entity; import lombok.Data; @Data public class SystemTable {private Long id; private String name; }

  • SystemTableMapper.xml内容:
    select * from system_tableselect * from system_table

    12、运行GitEggSystemApplication,在控制台看是否启动成功,如果启动成功,在浏览器中分别访问http://127.0.0.1:8001/system/...和http://127.0.0.1:8001/system/...,可以看到数据里面的数据:
    SpringCloud微服务实战——搭建企业级开发框架(五)(数据库持久化集成MySql+Druid+MyBatis-Plus)
    文章图片

    SpringCloud微服务实战——搭建企业级开发框架(五)(数据库持久化集成MySql+Druid+MyBatis-Plus)
    文章图片

    SpringCloud微服务实战——搭建企业级开发框架(五)(数据库持久化集成MySql+Druid+MyBatis-Plus)
    文章图片

本文源码在https://gitee.com/wmz1930/GitEgg的chapter-05分支。

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