birt用脚本javascript创建数据源，并从配置文件中读数据库信息
importPackage( Packages.java.io );importPackage( Packages.java.util );fin = new java.io.FileInputStream( new String(params["propFile"]) );props = new java.util.Properties( );props.load(fin);extensionProperties.odaURL = new String(props.getProperty("url"));extensionProperties.odaDriverClass = new String(props.getProperty("driver"));extensionProperties.odaUser = new String(props.getProperty("userid"));extensionProperties.odaPassword = new String(props.getProperty("password"));fin.close();?importPackage( Packages.java.io,Packages.java.util,Packages.java.net );importPackage( Packages.javax.servlet.http );req = reportContext.getHttpServletRequest( );propPath = new String(params["propFile"]);if ( propPath.charAt(0) != "/" ) propPath = "/" + propPath;url = req.getSession( ).getServletContext( ).getResource( propPath );if ( url != null ){ props = new java.util.Properties( ); props.load( url.openStream( ) ); extensionProperties.odaURL = new String(props.getProperty("url")); extensionProperties.odaDriverClass = new String(props.getProperty("driver")); extensionProperties.odaUser = new String(props.getProperty("userid")); extensionProperties.odaPassword = new String(props.getProperty("password"));}?