Source files:

GanttTreeDB.html

(this html page),

GanttTreeDef.xml

(static XML layout),

GanttTreeDBData.jsp

(server script generates XML data),

GanttTreeDBUpload.jsp

(server script saves XML data to database),

../Database.*

(source SQL database, table GanttTree)

You have to copy file hsqldb.jar to your JRE shared lib directory and restart your http server

The JSP service program must have write access to all files database.*

The

hsqldb.jar

is JDBC driver for

HSQLDB database

and is located in TreeGrid distribution in /Server/Jsp/ directory. The shared lib directory is usually jre_install_path/lib/ext and also e.g. in Tomcat is usually tomcat_install_path/shared/lib.
You can use any other SQL database instead of HSQLDB (e.g.

Oracle

,

MS SQL server

,

MySQL

,...), just assign different connection to java.sql.Connection Conn in the *.jsp files. You can run the ../MySqlUTF8.sql script to create the "TreeGridTest" sample database on your SQL server.

This example supports also free adding, moving and deleting tasks in tree levels.
The level names are shown in Levels columns. The Levels and ID columns are shown just for debugging.
For more Gantt features see Gantt Local examples or Gantt tutorials. For more ways of database communication see Basic Ajax or Form Submit JSP examples.