support for multi datasource and master slave datasource for spring boot
###Configuration 添加如下配置到classpath下的application.properties文件中
一：多数据配置
multidatasource.groups.ds.dbType=MYSQL multidatasource.groups.ds.datasources[0].rwType=W multidatasource.groups.ds.datasources[0].driverClassName=com.mysql.jdbc.Driver multidatasource.groups.ds.datasources[0].url=jdbc:mysql://localhost:3306/ds_0 multidatasource.groups.ds.datasources[0].username=root multidatasource.groups.ds.datasources[0].password=123456 multidatasource.groups.ds.datasources[0].initialSize=1 multidatasource.groups.ds.datasources[0].minIdle=1 multidatasource.groups.ds.datasources[0].maxActive=20 multidatasource.groups.ds.datasources[0].maxWait=60000 multidatasource.groups.ds.datasources[0].timeBetweenEvictionRunsMillis=1000 multidatasource.groups.ds.datasources[0].minEvictableIdleTimeMillis=1000 multidatasource.groups.ds.datasources[0].maxPoolPreparedStatementPerConnectionSize=30
multidatasource.groups.ds.dbType=MYSQL multidatasource.groups.otherds.datasources[0].rwType=W multidatasource.groups.otherds.datasources[0].driverClassName=com.mysql.jdbc.Driver multidatasource.groups.otherds.datasources[0].url=jdbc:mysql://localhost:3306/ds_1 multidatasource.groups.otherds.datasources[0].username=root multidatasource.groups.otherds.datasources[0].password=123456 multidatasource.groups.otherds.datasources[0].initialSize=1 multidatasource.groups.otherds.datasources[0].minIdle=1 multidatasource.groups.otherds.datasources[0].maxActive=20 multidatasource.groups.otherds.datasources[0].maxWait=60000 multidatasource.groups.otherds.datasources[0].timeBetweenEvictionRunsMillis=1000 multidatasource.groups.otherds.datasources[0].minEvictableIdleTimeMillis=1000 multidatasource.groups.otherds.datasources[0].maxPoolPreparedStatementPerConnectionSize=30
以上配置会生成两个数据源service： 名称为DataSource-ds的WrapperDataSource的Bean 名称为DataSource-otherds的WrapperDataSource的Bean 以及数据库事务service： 名称为TransactionManager-ds的DataSourceTransactionManager的Bean 名称为TransactionManager-otherds的DataSourceTransactionManager的Bean
二：master／slave数据源配置
multidatasource.groups.ds.dbType=MYSQL multidatasource.groups.ds.datasources[0].rwType=W multidatasource.groups.ds.datasources[0].driverClassName=com.mysql.jdbc.Driver multidatasource.groups.ds.datasources[0].url=jdbc:mysql://localhost:3306/ds_0 multidatasource.groups.ds.datasources[0].username=root multidatasource.groups.ds.datasources[0].password=123456 multidatasource.groups.ds.datasources[0].initialSize=1 multidatasource.groups.ds.datasources[0].minIdle=1 multidatasource.groups.ds.datasources[0].maxActive=20 multidatasource.groups.ds.datasources[0].maxWait=60000 multidatasource.groups.ds.datasources[0].timeBetweenEvictionRunsMillis=1000 multidatasource.groups.ds.datasources[0].minEvictableIdleTimeMillis=1000 multidatasource.groups.ds.datasources[0].maxPoolPreparedStatementPerConnectionSize=30 multidatasource.groups.ds.datasources[1].rwType=R multidatasource.groups.ds.datasources[1].driverClassName=com.mysql.jdbc.Driver multidatasource.groups.ds.datasources[1].url=jdbc:mysql://localhost:3306/ds_0 multidatasource.groups.ds.datasources[1].username=root multidatasource.groups.ds.datasources[1].password=123456 multidatasource.groups.ds.datasources[1].initialSize=1 multidatasource.groups.ds.datasources[1].minIdle=1 multidatasource.groups.ds.datasources[1].maxActive=20 multidatasource.groups.ds.datasources[1].maxWait=60000 multidatasource.groups.ds.datasources[1].timeBetweenEvictionRunsMillis=1000 multidatasource.groups.ds.datasources[1].minEvictableIdleTimeMillis=1000 multidatasource.groups.ds.datasources[1].maxPoolPreparedStatementPerConnectionSize=30
以上数据源可以实现读写分离，sql语句为select的查询默认走备库，其他走主库 multidatasource.groups.ds.datasources[0].rwType=W --为主库，只能配置一个主库 multidatasource.groups.ds.datasources[1].rwType=R --备库，可以配置多个
参照以上配置，框架会自动注册以下数据源的service： 名称为DataSource-ds的MasterSlaveDataSource的Bean 名称为DataSource-ds-MASTER的DruidDataSource的Bean 名称为DataSource-ds-SLAVE-1的DruidDataSource的Bean
以及数据库事务service： 名称为TransactionManager-ds的DataSourceTransactionManager的Bean