集成Mybatis
2024-10-15 03:21:45
本文根据个人喜好记录“腾讯课堂”的《Java项目之Maven+SpringMVC+Spring+Mybatis+MySql消费查询系统》视频教程关键步骤信息,视频地址:https://ke.qq.com/course/193395
1. pom文件中添加依赖
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency> <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency> <!-- https://mvnrepository.com/artifact/com.mchange/c3p0 -->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.2</version>
</dependency> <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>6.0.6</version>
</dependency> <!-- mybatis核心包 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency> <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.1</version>
</dependency>
其中spring和mybatis的版本号如下:
<spring.version>4.3.11.RELEASE</spring.version>
<mybatis.version>3.4.5</mybatis.version>
2. 配置spring-context
<context:property-placeholder location="classpath:db.properties"/>
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="jdbcUrl" value="${jdbc.url}"></property>
<property name="driverClass" value="${jdbc.driver}"></property>
<property name="user" value="${jdbc.user}"></property>
<property name="password" value="${jdbc.password}"></property>
</bean> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean> <tx:annotation-driven transaction-manager="transactionManager"/> <bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="mapperLocations" value="classpath:mapper/*.xml"/>
<property name="configLocation" value="classpath:mybatis-config.xml"/>
</bean> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="sqlSessionFactoryBeanName" value="sessionFactory"/>
<property name="basePackage" value="com.pawn.vip.dao"/>
</bean>
其中 db.properties如下:
jdbc.url=jdbc:mysql://localhost:3306/vip?useUnicode=true&characterEncoding=utf-8&serverTimezone=UTC
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.user=root
jdbc.password=root
3. 类路径下创建mybatis-config.xml
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration> </configuration>
4. 编写测试
4.1 数据库中添加测试表tbl_test_hello
4.2 编写mapper class
public interface HelloMapper { public String select() ;
}
4.3 编写mapper xml
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.pawn.vip.dao.HelloMapper"> <select id="select" resultType="string">
select text from tbl_test_hello limit 1
</select> </mapper>
4.4 业务层进行引用
@Service
public class HelloService { @Autowired
HelloMapper helloMapper ; public String getHelloString(){
return helloMapper.select() ;
}
}
4.5 测试结果
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