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://HdhCmsTestspringframework.org/schema/beans" xmlns:context = "http://HdhCmsTestspringframework.org/schema/context" xmlns:tx = "http://HdhCmsTestspringframework.org/schema/tx" xmlns:xsi = "http://HdhCmsTestw3.org/2001/XMLSchema-instance" xsi:schemaLocation=" http://HdhCmsTestspringframework.org/schema/beans http://HdhCmsTestspringframework.org/schema/beans/spring-beans-3.0.xsd http://HdhCmsTestspringframework.org/schema/context http://HdhCmsTestspringframework.org/schema/context/spring-context-3.0.xsd http://HdhCmsTestspringframework.org/schema/tx http://HdhCmsTestspringframework.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://HdhCmsTestspringframework.org/schema/beans" xmlns:context = "http://HdhCmsTestspringframework.org/schema/context" xmlns:tx = "http://HdhCmsTestspringframework.org/schema/tx" xmlns:xsi = "http://HdhCmsTestw3.org/2001/XMLSchema-instance" xsi:schemaLocation=" http://HdhCmsTestspringframework.org/schema/beans http://HdhCmsTestspringframework.org/schema/beans/spring-beans-3.0.xsd http://HdhCmsTestspringframework.org/schema/context http://HdhCmsTestspringframework.org/schema/context/spring-context-3.0.xsd http://HdhCmsTestspringframework.org/schema/tx http://HdhCmsTestspringframework.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。
原文链接：https://blog.csdn.net/qq_40436854/article/details/101923773
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