springboot+mybatis多数据源配置

首先application.properties配置：

# 主数据源
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://${mysql.ip}:3306/stu?useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull
spring.datasource.username=${mysql.username}
spring.datasource.password=${mysql.password}

# 第二个数据源
spring.datasourceSecond.driver-class-name=com.mysql.jdbc.Driver
spring.datasourceSecond.url=jdbc:mysql://${mysql.ip}:3306/easydoc?useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull
spring.datasourceSecond.username=${mysql.username}
spring.datasourceSecond.password=${mysql.password}

• 禁掉springboot自带的DataSourceAutoConfiguration

@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class})

• 主数据源

package com.myapp.config;

import java.io.IOException;

import javax.sql.DataSource;

import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.support.TransactionTemplate;
import org.springframework.util.Assert;


/**
 * 主数据源,使用方式:
 * <pre>
 * 将spring boot自带的DataSourceAutoConfiguration禁掉
 * @SpringBootApplication(exclude = {DataSourceAutoConfiguration.class})
 * </pre>
 * @author tanghc
 */
@Configuration
@MapperScan(basePackages = { DbConfigMaster.basePackage }, sqlSessionFactoryRef = DbConfigMaster.sqlSessionFactoryName)
public class DbConfigMaster {

    /* ********************只需要改这里的配置******************** */
    static final String dbName = "master";
    /** 配置文件前缀 */
    public static final String prefix = "spring.datasource";
    /** 存放mapper包路径 */
    public static final String basePackage = "com.myapp.dao";
    /** mybatis的config文件路径 */
    public static final String mybatisConfigLocation = "classpath:mybatis/mybatisConfig.xml";
    /** mybatis的mapper文件路径 */
    public static final String mybatisMapperLocations = "classpath:mybatis/mapper/*.xml";
    /* **************************************************** */

    /** 数据源名称 */
    public static final String dataSourceName = "dataSource" + dbName;
    /** sqlSessionTemplate名称 */
    public static final String sqlSessionTemplateName = "sqlSessionTemplate" + dbName;
    /** sqlSessionFactory名称 */
    public static final String sqlSessionFactoryName = "sqlSessionFactory" + dbName;
    /** transactionManager名称 */
    public static final String transactionManagerName = "transactionManager" + dbName;
    /** transactionTemplate名称 */
    public static final String transactionTemplateName = "transactionTemplate" + dbName;


    @Bean(name = dataSourceName)
    @Primary
    @ConfigurationProperties(prefix = prefix) // application.properteis中对应属性的前缀
    public DataSource dataSource() {
        return DataSourceBuilder.create().build();
    }


    @Bean(name = sqlSessionFactoryName)
    public SqlSessionFactory sqlSessionFactory(@Autowired @Qualifier(dataSourceName) DataSource dataSource) throws Exception {
        Assert.notNull(dataSource, "dataSource can not be null.");

        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();

        bean.setDataSource(dataSource);
        bean.setConfigLocation(this.getResource(mybatisConfigLocation));
        bean.setMapperLocations(this.getResources(mybatisMapperLocations));

        return bean.getObject();

    }

    @Bean(name = sqlSessionTemplateName)
    public SqlSessionTemplate sqlSessionTemplate(
            @Autowired @Qualifier(sqlSessionFactoryName) SqlSessionFactory sessionFactory) throws Exception {
        SqlSessionTemplate template = new SqlSessionTemplate(sessionFactory); // 使用上面配置的Factory
        return template;
    }

    @Bean(name = transactionManagerName)
    public PlatformTransactionManager annotationDrivenTransactionManager(
            @Autowired @Qualifier(dataSourceName) DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    @Bean(name = transactionTemplateName)
    public TransactionTemplate transactionTemplate(@Autowired @Qualifier(transactionManagerName)PlatformTransactionManager transactionManager) {
        return new TransactionTemplate(transactionManager);
    }


    private Resource[] getResources(String path) throws IOException {
        ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        return resolver.getResources(path);
    }

    private Resource getResource(String path) {
        ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        return resolver.getResource(path);
    }

}

这个文件不用做多大的修改，只需要修改上面的配置内容即可。

• 第二个数据源

package com.myapp.config;

import java.io.IOException;

import javax.sql.DataSource;

import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.support.TransactionTemplate;
import org.springframework.util.Assert;

import com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceBuilder;

/**
 * 第二个数据源，后续有第三个数据，复制这个文件，然后改下配置即可
 * @author tanghc
 */
@Configuration
@MapperScan(basePackages = { DbConfigSecond.basePackage }, sqlSessionFactoryRef = DbConfigSecond.sqlSessionFactoryName)
public class DbConfigSecond {

    /* ********************只需要改这里的配置******************** */
    static final String dbName = "Second";
    /** 配置文件前缀 */
    public static final String prefix = "spring.datasourceSecond";
    /** 存放mapper包路径 */
    public static final String basePackage = "com.app2.dao";
    /** mybatis的config文件路径 */
    public static final String mybatisConfigLocation = "classpath:mybatis/mybatisConfig.xml";
    /** mybatis的mapper文件路径 */
    public static final String mybatisMapperLocations = "classpath:mybatis/mapper2/*.xml";
    /* **************************************************** */

    /** 数据源名称 */
    public static final String dataSourceName = "dataSource" + dbName;
    /** sqlSessionTemplate名称 */
    public static final String sqlSessionTemplateName = "sqlSessionTemplate" + dbName;
    /** sqlSessionFactory名称 */
    public static final String sqlSessionFactoryName = "sqlSessionFactory" + dbName;
    /** transactionManager名称 */
    public static final String transactionManagerName = "transactionManager" + dbName;
    /** transactionTemplate名称 */
    public static final String transactionTemplateName = "transactionTemplate" + dbName;

    @Bean(name = dataSourceName)
    @ConfigurationProperties(prefix = prefix) // application.properteis中对应属性的前缀
    public DataSource dataSourceMater() {
        return DruidDataSourceBuilder.create().build();
    }

    @Bean(name = sqlSessionFactoryName)
    public SqlSessionFactory sqlSessionFactory(@Autowired @Qualifier(dataSourceName) DataSource dataSource) throws Exception {
        Assert.notNull(dataSource, "dataSource can not be null.");
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();

        bean.setDataSource(dataSource);
        bean.setConfigLocation(this.getResource(mybatisConfigLocation));
        bean.setMapperLocations(this.getResources(mybatisMapperLocations));

        return bean.getObject();

    }

    @Bean(name = sqlSessionTemplateName)
    public SqlSessionTemplate sqlSessionTemplate(
            @Autowired @Qualifier(sqlSessionFactoryName) SqlSessionFactory sessionFactory) throws Exception {
        SqlSessionTemplate template = new SqlSessionTemplate(sessionFactory); // 使用上面配置的Factory
        return template;
    }

    @Bean(name = transactionManagerName)
    public PlatformTransactionManager annotationDrivenTransactionManager(
            @Autowired @Qualifier(dataSourceName) DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    @Bean(name = transactionTemplateName)
    public TransactionTemplate transactionTemplate(@Autowired @Qualifier(transactionManagerName)PlatformTransactionManager transactionManager) {
        return new TransactionTemplate(transactionManager);
    }


    private Resource[] getResources(String path) throws IOException {
        ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        return resolver.getResources(path);
    }

    private Resource getResource(String path) {
        ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        return resolver.getResource(path);
    }

}

第二个数据源，后续有第三个数据，复制这个文件，然后改下配置即可