Spring扫描Mybatis的mapper接口的配置
1.前言
mybatis支持与spring结合使用，使得mybatis中的mapper接口可以作为spring容器中的bean被应用代码中相关类，如Service类，通过@Autowired自动注入进来。
在使用方面需要在项目中引入以下包：
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<dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.1</version></dependency> |
2. 在spring中可以通过三种方式
来自动扫描获取应用代码的mybatis相关的mapper接口定义：
2.1在applicationContext.xml中使用<mybatis:scan />
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<beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd"> ... <!-- mybatis --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <property name="mapperLocations" value="classpath:mybatis/mapper/**/*.xml" /> <property name="configLocation" value="classpath:mybatis/mybitas-config.xml" /> </bean> <mybatis:scan base-package="cn.cggeeker.dao"/> ...</beans> |
2.2在applicationContext.xml中
使用bean标签注册MapperScannerConfigurer，即：
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<beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd"> ... <!-- mybatis --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <property name="mapperLocations" value="classpath:mybatis/mapper/**/*.xml" /> <property name="configLocation" value="classpath:mybatis/mybitas-config.xml" /> </bean> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="cn.cggeeker.dao" /> </bean> ... </beans> |
2.3如果应用是使用Java配置方式而不是XML
则在@Configuration配置类使用@MapperScan或者@MapperScans注解：
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@Configuration@MapperScan("cn.cggeeker.dao")public class AppConfig { @Bean public DataSource dataSource() { return new PooledDataSource("com.mysql.jdbc.Driver", "jdbc:mysql://localhost:3306/test", "root", "root"); } @Bean public SqlSessionFactory sqlSessionFactory() throws Exception { SqlSessionFactoryBeansessionFactory = new SqlSessionFactoryBean(); sessionFactory.setDataSource(dataSource()); return sessionFactory.getObject(); }} |
Spring配置扫描mybatis的mapper文件注意
一般会将不业务的mapper文件放到不同的包中：
spring配置扫描就需要配置下面的方式（两个*）：
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<!-- mybatis文件配置，扫描所有mapper文件 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean" p:dataSource-ref="dataSource" p:configLocation="classpath:conf/mybatis-config.xml" p:mapperLocations="classpath:mapper/**/*.xml" /> |
以上为个人经验，希望能给大家一个参考，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/qq_40436854/article/details/101923773
