Mybatis Spring 多数据库 Java 配置

java spring mybatis

2022-09-02 02:54:46

我正在使用Spring和Mybatis，我有两个数据库，第一个数据库的配置相对容易，但我无法使用Spring和事务来处理第二个数据库，这是我的代码

@Configuration
@ComponentScan(basePackages = {"hernandez.service", "hernandez.dao"})
@EnableTransactionManagement
@MapperScan(basePackages="hernandez.mapper" ) 
@Import(DbConfig2.class)
public class AppConfig {

@Bean(name = "dataSource")
public DataSource dataSource() {
    DriverManagerDataSource ds = new DriverManagerDataSource("com.mysql.jdbc.Driver",
            "jdbc:mysql://localhost:3306/northwind", "root", "");
    return ds;
}

@Bean
public SqlSessionFactoryBean sqlSessionFactory() {
    SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();
    factoryBean.setDataSource(dataSource()); 
    return factoryBean;
}

@Bean(name = "transactionManager")
public PlatformTransactionManager transactionManager() {
    return new DataSourceTransactionManager(dataSource());
}
}

@Configuration
@MapperScan("loli.mapper" ) 
public class DbConfig2 {
@Bean(name = "dataSource_2")
public DataSource dataSource2() {
    DriverManagerDataSource ds = new DriverManagerDataSource("com.mysql.jdbc.Driver",
            "jdbc:mysql://localhost:3306/dmsolut_dmsms", "root", "");
    return ds;
}

@Bean
public SqlSessionFactory sqlSessionFactory2() throws Exception{
    SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();
    factoryBean.setDataSource(dataSource2());
    return factoryBean.getObject();
}

@Bean(name = "transactionManager_2")
public PlatformTransactionManager transactionManager() {
    return new DataSourceTransactionManager(dataSource2());
}
}

有没有办法让它使用纯Spring Java配置或至少使用一些XML？没有官方文档可以在Mybatis-Spring项目中使用两个数据库

答案 1

现在在我的项目中使用了带有mybatis的多数据源。这是一个示例，添加到您的应用程序中.xml

  <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName" value="com.microsoft.sqlserver.jdbc.SQLServerDriver"/>
    <property name="url" value="${center.connectionURL}"/>
    <property name="username"  value="${userName}"/>
    <property name="password" value="${password}"/>
</bean>

<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="com.xxx.dao.center"/>
    <property name="sqlSessionFactoryBeanName" value="cneterSqlSessionFactory"/>
</bean>

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean" name="cneterSqlSessionFactory">
    <property name="dataSource" ref="dataSource"></property>
    <property name="mapperLocations" value="classpath*:mapperConfig/center/*.xml"/>
    <property name="configLocation" value="classpath:mybatis-config.xml"/>
</bean>

<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource"/>
</bean>
<tx:annotation-driven transaction-manager="transactionManager"/>
<!--center db end-->
<!--exdb-->
<bean id="dataSourceEx" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName" value="com.microsoft.sqlserver.jdbc.SQLServerDriver"/>
    <property name="url" value="${ex.connectionURL}"/>
    <property name="username"  value="${userName}"/>
    <property name="password" value="${password}"/>
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="com.xxx.dao.ex"/>
    <property name="sqlSessionFactoryBeanName" value="exSqlSessionFactory"/>
</bean>
<bean id="sqlSessionFactoryEx" class="org.mybatis.spring.SqlSessionFactoryBean" name="exSqlSessionFactory">
    <property name="dataSource" ref="dataSourceEx"></property>
    <property name="mapperLocations" value="classpath*:mapperConfig/ex/*.xml"/>
    <property name="configLocation" value="classpath:mybatis-config.xml"/>
</bean>
<bean id="transactionManagerEx" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSourceEx"/>
</bean>

答案 2

使用我们在项目中使用的java配置示例添加答案：

import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.type.JdbcType;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.jdbc.datasource.lookup.JndiDataSourceLookup;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;

import javax.sql.DataSource;

@Configuration
@ComponentScan(basePackages = "com.mycompany")
@EnableTransactionManagement(proxyTargetClass = true)
public class ApplicationConfig2 {
    public static final String DATA_SOURCE_NAME_1 = "jdbc/dataSource1";
    public static final String DATA_SOURCE_NAME_2 = "jdbc/dataSource2";

    public static final String SQL_SESSION_FACTORY_NAME_1 = "sqlSessionFactory1";
    public static final String SQL_SESSION_FACTORY_NAME_2 = "sqlSessionFactory2";

    public static final String MAPPERS_PACKAGE_NAME_1 = "com.mycompany.mappers.dao1";
    public static final String MAPPERS_PACKAGE_NAME_2 = "com.mycompany.mappers.dao2";

    @Bean
    public DataSource dataSource1() {
        JndiDataSourceLookup dsLookup = new JndiDataSourceLookup();
        return dsLookup.getDataSource(DATA_SOURCE_NAME_1);
    }

    @Bean
    public DataSource dataSource2() {
        JndiDataSourceLookup dsLookup = new JndiDataSourceLookup();
        return dsLookup.getDataSource(DATA_SOURCE_NAME_2);
    }

    @Bean
    public PlatformTransactionManager transactionManager() {
        return new DataSourceTransactionManager(dataSource());
    }


    @Bean(name = SQL_SESSION_FACTORY_NAME_1)
    public SqlSessionFactory sqlSessionFactory1(DataSource dataSource1) throws Exception {
        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setTypeHandlersPackage(DateTimeTypeHandler.class.getPackage().getName());
        sqlSessionFactoryBean.setDataSource(dataSource1);
        SqlSessionFactory sqlSessionFactory = sqlSessionFactoryBean.getObject();
        sqlSessionFactory.getConfiguration().setMapUnderscoreToCamelCase(true);
        sqlSessionFactory.getConfiguration().setJdbcTypeForNull(JdbcType.NULL);
        return sqlSessionFactory;
    }

    @Bean(name = SQL_SESSION_FACTORY_NAME_2)
    public SqlSessionFactory sqlSessionFactory2(DataSource dataSource2) throws Exception {
        SqlSessionFactoryBean diSqlSessionFactoryBean = new SqlSessionFactoryBean();
        diSqlSessionFactoryBean.setTypeHandlersPackage(DateTimeTypeHandler.class.getPackage().getName());
        diSqlSessionFactoryBean.setDataSource(dataSource2);
        SqlSessionFactory sqlSessionFactory = diSqlSessionFactoryBean.getObject();
        sqlSessionFactory.getConfiguration().setMapUnderscoreToCamelCase(true);
        sqlSessionFactory.getConfiguration().setJdbcTypeForNull(JdbcType.NULL);
        return sqlSessionFactory;
    }

    @Bean
    public MapperScannerConfigurer mapperScannerConfigurer1() {
        MapperScannerConfigurer configurer = new MapperScannerConfigurer();
        configurer.setBasePackage(MAPPERS_PACKAGE_NAME_1);
        configurer.setSqlSessionFactoryBeanName(SQL_SESSION_FACTORY_NAME_1);
        return configurer;
    }

    @Bean
    public MapperScannerConfigurer mapperScannerConfigurer2() {
        MapperScannerConfigurer configurer = new MapperScannerConfigurer();
        configurer.setBasePackage(MAPPERS_PACKAGE_NAME_2);
        configurer.setSqlSessionFactoryBeanName(SQL_SESSION_FACTORY_NAME_2);
        return configurer;
    }
}