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 >
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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 >
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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 >
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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();
}
}
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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" />
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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