如何整合MyBatis

1、pom依赖

        <dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId><version>1.3.2</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><scope>runtime</scope></dependency><!-- 分页插件 --><dependency><groupId>com.github.pagehelper</groupId><artifactId>pagehelper-spring-boot-starter</artifactId><version>1.2.5</version></dependency><!--mapper --><dependency><groupId>tk.mybatis</groupId><artifactId>mapper-spring-boot-starter</artifactId><version>1.1.3</version></dependency><!-- alibaba的druid数据库连接池 --><dependency><groupId>com.alibaba</groupId><artifactId>druid-spring-boot-starter</artifactId><version>1.1.9</version></dependency>

2、添加配置

spring.datasource.name=mysql_test
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
#druid相关配置
spring.datasource.druid.filters=stat
spring.datasource.druid.driver-class-name=com.mysql.jdbc.Driver
#基本属性
spring.datasource.druid.url=jdbc:mysql://localhost:3306/test?characterEncoding=utf8&useSSL=false
spring.datasource.druid.username=root
spring.datasource.druid.password=1234
#配置初始化大小/最小/最大
spring.datasource.druid.initial-size=1
spring.datasource.druid.min-idle=1
spring.datasource.druid.max-active=20
#获取连接等待超时时间
spring.datasource.druid.max-wait=60000
#间隔多久进行一次检测，检测需要关闭的空闲连接
spring.datasource.druid.time-between-eviction-runs-millis=60000
#一个连接在池中最小生存的时间
spring.datasource.druid.min-evictable-idle-time-millis=300000
spring.datasource.druid.validation-query=SELECT 'x'
spring.datasource.druid.test-while-idle=true
spring.datasource.druid.test-on-borrow=false
spring.datasource.druid.test-on-return=false
#打开PSCache，并指定每个连接上PSCache的大小。oracle设为true，mysql设为false。分库分表较多推荐设置为false
spring.datasource.druid.pool-prepared-statements=false
spring.datasource.druid.max-pool-prepared-statement-per-connection-size=20
#Mapper路径
mybatis.mapper-locations=classpath=mapper/*.xml
#pagehelper
pagehelper.helperDialect=mysql
pagehelper.reasonable=true
pagehelper.supportMethodsArguments=true
pagehelper.params=count=countSql

3、自动生成Mapper

添加Mybatis的自动生成插件

            <plugin><groupId>org.mybatis.generator</groupId><artifactId>mybatis-generator-maven-plugin</artifactId><version>1.3.2</version><configuration><configurationFile>${basedir}/src/main/resources/generator/generatorConfig.xml</configurationFile><overwrite>true</overwrite><verbose>true</verbose></configuration><dependencies><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>${mysql.version}</version></dependency><dependency><groupId>tk.mybatis</groupId><artifactId>mapper</artifactId><version>3.4.0</version></dependency></dependencies></plugin>

配置Mybatis的generatorConfig

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfigurationPUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN""http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration><properties resource="application.properties"/><context id="Mysql" targetRuntime="MyBatis3Simple" defaultModelType="flat"><property name="beginningDelimiter" value="`"/><property name="endingDelimiter" value="`"/><plugin type="tk.mybatis.mapper.generator.MapperPlugin"><property name="mappers" value="sample.mybatis.mapper.MyMapper"/></plugin><jdbcConnection connectionURL="jdbc:mysql://localhost:3306/test?useUnicode=true"driverClass="com.mysql.jdbc.Driver"userId="root"password="1234"></jdbcConnection><javaModelGenerator targetPackage="sample.mybatis.entity" targetProject="src/main/java"></javaModelGenerator><sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources"/><javaClientGenerator targetPackage="sample.mybatis.dao" targetProject="src/main/java"type="XMLMAPPER"/><table tableName="city"><!--mysql 配置--><generatedKey column="id" sqlStatement="Mysql" identity="true"/></table></context>
</generatorConfiguration>

执行插件会自动生成实体Bean，Mapper接口和对应的xml文件。

5、写个简单的Controller触发调用

@RestController
public class CityController {@Autowiredprivate CityMapper cityMapper;@GetMapping("/")public List<City> index() {PageHelper.startPage(0, 3);List<City> cities = this.cityMapper.selectAll();return cities;}}

启动项目后通过PostMan访问：http://localhost:8080/

源码地址：GitHub

本篇到此结束，如果读完觉得有收获的话，欢迎点赞、关注、加公众号【贰级天災】，查阅更多精彩历史！！！