Atitit. Dynamically loading database configuration in ORM Hibernate MyBatis

Atitit. dynamic load Database configuration In Orm

1. Advantages of dynamic load Database configuration ::: 1

1.1. Combine multiple profiles ... 1

1.2. Connect multiple Databases 1

2. Basic process::: getcfg Memory Object ,,,, Generating factory class , opoensession 1

2.1. Hibernate Adding configuration flow dynamically 1

2.2. MyBatis Dynamic Add configuration Flow 1

2.3. #===hb Code 2

3. Reference 3

1. Advantages of dynamic load Database configuration:::1.1. Combination of multiple configuration files...1.2. Connect multiple Databases 2. The basic process::: GetcfgMemory Objects,,,,Generate Factory class,in theopoensession

Author :: old Wow's paw attilax Ayron, email:[email protected]

Reprint please indicate source: Http://blog.csdn.net/attilax

2.1. HibernateDynamic Add configuration Flow

Configure configuration objects ... is the configuration file Java Object Mappings .... will never Configuration . buildsessionfactory ();

=============

Configuration . Configure (propertyfile) ;

Configuration . SetProperty ("Connection.url", connection_url) ;

sessionfactory = configuration. buildsessionfactory ();

2.2. MyBatisDynamic Add configuration Flow

·  Properties.setproperty ("Jdbc.password", " Dynamic settings ");

·

· loading mybatis configuration files and mapping files

· String resource = "Mybatis/mybatis-config.xml";

· Reader reader = Resources.getresourceasreader (Resource);

· Sqlsessionfactorybuilder builder = new Sqlsessionfactorybuilder ();

· Sqlsessionfactory factory = Builder.build (reader, properties);

· sqlsession session = Factory.opensession ();

2.3. #===hb Code

Static   {

try {

Configuration . Configure (propertyfile) ;

O8j

Properties Properties = New properties () ;

Properties . Load ( new inputstreamreader(new fileinputstream (Pathx

. ClassPath () + "/jdbc.properties"), "Utf-8" ));

string   username   =   properties getproperty ( "jdbc.username" ) trim () ;

string   password   =   properties getproperty ( "Jdbc.password" ;

String driverclass = properties. GetProperty ("Jdbc.driverclassname")

. Trim ();

String connection_url = properties. GetProperty ("Jdbc.url") . Trim ();

// Configuration.setproperties (properties);

Configuration . SetProperty ("Connection.driver_class", driverclass) ;

Configuration . SetProperty ("Connection.url", connection_url) ;

Configuration . SetProperty ("Connection.username", username) ;

Configuration . SetProperty ("Connection.password", password) ;

Configuration . SetProperty ("Hibernate.connection.url",

Connection_url );

Configuration . SetProperty ("Hibernate.connection.driver_class",

Driverclass );

Configuration

. SetProperty ("Hibernate.connection.username", username) ;

Configuration

. SetProperty ("Hibernate.connection.password", password) ;

End O8j

Of course, in addition to the specified XML file, you can also specify the class being mapped, and hibernate will help you find the mapping definition file:

// Configuration.addclass (gvmaterial.class);

// Configuration.addannotatedclass (gvmaterial.class);

// Configuration.set

// Configuration.addresource (resourcename)

sessionfactory = configuration. buildsessionfactory ();

} catch ( Exception e ) {

System . Err

. println ("%%%% Error Creating sessionfactory%%%%") ;

e . Printstacktrace ();

Throw New runtimeexception (e);

//ati o8j

}

3. Reference

MyBatis Dynamic Connection database, dynamic incoming database parameters - Haitao's CSDN blog - Blog channel -CSDN.NET.htm

Atitit. Dynamically loading database configuration in ORM Hibernate MyBatis