springboot中實現多資料來源

3.1、原理介紹

a、配置檔案

spring.aop.proxy-target-class = true

spring.aop.auto = true
spring.datasource.druid.db1.url = 
spring.datasource.druid.db1.username = 
spring.datasource.druid.db1.password = 
spring.datasource.druid.db1.driver-class-name = com.mysql.jdbc.driver
spring.datasource.druid.db1.initialsize = 5
spring.datasource.druid.db1.minidle = 5
spring.datasource.druid.db1.maxactive = 20
spring.datasource.druid.db2.url = 
spring.datasource.druid.db2.username = 
spring.datasource.druid.db2.password = 
spring.datasource.druid.db2.driver-class-name = com.mysql.jdbc.driver
spring.datasource.druid.db2.initialsize = 5
spring.datasource.druid.db2.minidle = 5
spring.datasource.druid.db2.maxactive = 20
spring.datasource.druid.db3.url = 
spring.datasource.druid.db3.username = 
spring.datasource.druid.db3.password = 
spring.datasource.druid.db3.driver-class-name = com.mysql.jdbc.driver
spring.datasource.druid.db3.initialsize = 5
spring.datasource.druid.db3.minidle = 5
spring.datasource.druid.db3.maxactive = 20

@bean(name = "db1")

@configurationproperties(prefix = "spring.datasource.druid.db1")
public datasource db1() 
@bean(name = "db2")
@configurationproperties(prefix = "spring.datasource.druid.db2")
public datasource db2() 
@bean(name = "db3")
@configurationproperties(prefix = "spring.datasource.druid.db3")
public datasource db3()

@getter

@allargsconstructor
public enum dbtypeenum

/**

* 動態資料來源配置
** @return
*/@bean
@primary
public datasource multipledatasource(
@qualifier("db1") datasource db1,
@qualifier("db2") datasource db2,
@qualifier("db3") datasource db3) 
@bean("sqlsessionfactory")
public sqlsessionfactory sqlsessionfactory() throws exception );
sqlsessionfactory.setglobalconfig(globalconfiguration());
return sqlsessionfactory.getobject();
}

public class dynamicdatasource extends abstractroutingdatasource 

}

public class dbcontextholder 

/*** 取得當前資料來源
** @return
*/public static string getdbtype() 
/** 清除上下文資料 */
public static void cleardbtype() 
}

@component

@order(value = -100)
@slf4j
@aspect
public class datasourceswitchaspect 
private void db2aspect() {}
private void db3aspect() {}
@before("db1aspect()")
public void db1() 
@before("db2aspect()")
public void db2() 
@before("db3aspect()")
public void db3() 
}

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