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 generatorConfiguration
PUBLIC "-//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 {
@Autowired
private 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
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