• springBoot多数据源(不同类型数据库)项目


    一个基于springboot的多数据源(mysql、sqlserver)项目,先看看项目结构,注意dao层

    多数据源mysql配置代码:

    package com.douzi.robotcenter.core;
    
    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.Qualifier;
    import org.springframework.boot.context.properties.ConfigurationProperties;
    import org.springframework.boot.jdbc.DataSourceBuilder;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.context.annotation.Primary;
    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.annotation.EnableTransactionManagement;
    
    import javax.sql.DataSource;
    
    /**
     * mysql
     */
    @Configuration
    @MapperScan(
            basePackages = {"com.douzi.robotcenter.mysql.dao"},
            sqlSessionFactoryRef = "mysqlSqlSessionFactory",
            sqlSessionTemplateRef = "mysqlSqlSessionTemplate"
    )
    @EnableTransactionManagement(proxyTargetClass = true)
    public class MysqltMybatisConfig {
    
        @Bean
        @Primary //必须加此注解,不然报错,下一个类则不需要添加
        @ConfigurationProperties(prefix = "spring.datasource.primary")
        public DataSource mysqlDataSource() {
            return DataSourceBuilder.create().build();
        }
    
        @Bean
        public SqlSessionTemplate mysqlSqlSessionTemplate(@Qualifier("mysqlSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
            SqlSessionTemplate template = new SqlSessionTemplate(sqlSessionFactory);
            return template;
        }
    
        @Bean
        public SqlSessionFactory mysqlSqlSessionFactory(@Qualifier("mysqlDataSource") DataSource dataSource) throws Exception {
            SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
            bean.setDataSource(dataSource); 
    
            //添加XML目录
            ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
            try {
                bean.setMapperLocations(resolver.getResources("classpath*:mapper/*.xml"));
                return bean.getObject();
            } catch (Exception e) {
                e.printStackTrace();
                throw new RuntimeException(e);
            }
        }
    
        //使用方式:@Transactional(默认msyql主事物)
        @Bean
        @Primary
        public PlatformTransactionManager mysqlTransactionManager(@Qualifier("mysqlDataSource") DataSource mysqlDataSource) {
            return new DataSourceTransactionManager(mysqlDataSource);
        }
    
    }
    

    多数据源sqlserver配置代码:

    package com.douzi.robotcenter.core;
    
    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.Qualifier;
    import org.springframework.boot.context.properties.ConfigurationProperties;
    import org.springframework.boot.jdbc.DataSourceBuilder;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    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.annotation.EnableTransactionManagement;
    
    import javax.sql.DataSource;
    
    /**
     * sqlserver
     */
    @Configuration
    @MapperScan(
            basePackages = {"com.douzi.robotcenter.sqlserver.dao"},
            sqlSessionFactoryRef = "sqlserverSqlSessionFactory",
            sqlSessionTemplateRef = "sqlserverSqlSessionTemplate"
    )
    @EnableTransactionManagement(proxyTargetClass = true)
    public class SqlserverMybatisConfig {
    
        @Bean(name = "sqlserverDataSource")
        @ConfigurationProperties(prefix = "spring.datasource.second") // prefix值必须是application.properteis中对应属性的前缀
        public DataSource sqlserverDataSource() {
            return DataSourceBuilder.create().build();
        }
        
        @Bean
        public SqlSessionFactory sqlserverSqlSessionFactory(@Qualifier("sqlserverDataSource") DataSource dataSource) throws Exception {
            SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
            bean.setDataSource(dataSource); 
            //添加XML目录
            ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
            try {
                bean.setMapperLocations(resolver.getResources("classpath*:mapper/*.xml"));
                return bean.getObject();
            } catch (Exception e) {
                e.printStackTrace();
                throw new RuntimeException(e);
            }
        }
        
        @Bean
        public SqlSessionTemplate sqlserverSqlSessionTemplate(@Qualifier("sqlserverSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
            SqlSessionTemplate template = new SqlSessionTemplate(sqlSessionFactory); // 使用上面配置的Factory
            return template;
        }
    
        //使用方式:@Transactional(transactionManager="sqlserverTransactionManager")
        @Bean
        public PlatformTransactionManager sqlserverTransactionManager(@Qualifier("sqlserverDataSource") DataSource oracleDataSource) {
            return new DataSourceTransactionManager(oracleDataSource);
        }
    }
    

    之前dao层都是放一个目录下的:发现本地运行没问题,放到Linux上就会出现No statement Error(找不到xml),后来把dao层分两个目录来存放,然后扫描不同的包,就OK了

    源码地址:https://github.com/wangfajun/robotCenter

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  • 原文地址:https://www.cnblogs.com/wangfajun/p/9668593.html
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