要在MyBatis中切換數(shù)據(jù)源,可以使用MyBatis的插件來實現(xiàn)。下面是一種切換數(shù)據(jù)源的方法:
public class DataSourceSwitchInterceptor implements Interceptor {
private DataSource dataSource;
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
}
@Override
public Object intercept(Invocation invocation) throws Throwable {
// 切換數(shù)據(jù)源
DynamicDataSource.setDataSource(dataSource);
Object result = invocation.proceed();
// 恢復(fù)默認數(shù)據(jù)源
DynamicDataSource.clearDataSource();
return result;
}
@Override
public Object plugin(Object target) {
return Plugin.wrap(target, this);
}
@Override
public void setProperties(Properties properties) {
// 設(shè)置數(shù)據(jù)源屬性
}
}
<plugins>
<plugin interceptor="com.example.DataSourceSwitchInterceptor">
<property name="dataSource" value="dataSource1"/>
</plugin>
</plugins>
public void switchDataSource() {
DataSource dataSource2 = // 獲取第二個數(shù)據(jù)源
DataSourceSwitchInterceptor interceptor = (DataSourceSwitchInterceptor) sqlSessionFactory.getConfiguration().getInterceptorChain().get(0);
interceptor.setDataSource(dataSource2);
// 執(zhí)行SQL語句
}
通過以上步驟,可以實現(xiàn)在MyBatis中切換數(shù)據(jù)源。需要注意的是,在切換數(shù)據(jù)源后,務(wù)必在SQL語句執(zhí)行完成后調(diào)用DynamicDataSource.clearDataSource()方法恢復(fù)默認數(shù)據(jù)源。