Date to String Conversion in Pentaho Kettle

Here is the simple conversion from Date to String in the spoon

Go the design mode select Modified Java Script Step lying under the Scripting folder drag & drop it.

Double click the Java Modified Script  Step and write the following code in the scriptVale

var dateToStringConversion = date2str(datefield_name, "yyyyMMdd");

where dateToStringConversion  is the name of the variable and datefield_name is the field name to whom you want to convert which is coming from the previous step