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:
文章图片
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:
4.0.0 com.gitegg.platform
GitEgg-Platform
${project.artifactId}
1.0-SNAPSHOT pom
gitegg-platform-bom
gitegg-platform-db
gitegg-platform-mybatis
1.8 3.8.1 UTF-8 UTF-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
dev dev
truetest test
pro pro
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
4.0.0 com.gitegg.platform
gitegg-platform-bom
${project.artifactId}
${gitegg.project.version} pom1.8 3.8.1 UTF-8 UTF-8UTF-81.0-SNAPSHOT 8.0.17 9.1-901.jdbc41.1.23 3.4.0
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
4.0.0 gitegg-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
4.0.0 gitegg-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。
文章图片
文章图片
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
4.0.0 gitegg-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:
文章图片
文章图片
文章图片
推荐阅读
- 基于微信小程序带后端ssm接口小区物业管理平台设计
- CET4听力微技能一
- 微习惯复盘
- 社保代缴公司服务费包含哪些
- 员工的微信朋友圈是公司的宣传阵地吗()
- 私有化轻量级持续集成部署方案--03-部署web服务(下)
- FBI怎么和恐怖分子谈判
- 探索免费开源服务器tomcat的魅力
- 微雨中的东湖
- 小醉微记|小醉微记|心不安处皆动荡