Refresh Your Java - Before Java Interview
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A template engine is software that is designed to process the templates and
content information to produce output web documents. It runs in the context of a template system.
Some of the Popular Java Based Templating Egines are "FreeMarker","Velocity"
Quick example of Velocity Template :
Step 1: Create a .vm file
sayHello.vm:
Hello $name ! How are you ?
Sample : input
this to ve.getTemplate()
import java.io.StringWriter;
import
org.apache.velocity.app.VelocityEngine;
import
org.apache.velocity.Template;
import
org.apache.velocity.VelocityContext;
public class
HelloWorld
{
public static void main( String[] args )
throws Exception
{
/* initialize an engine */
VelocityEngine ve = new VelocityEngine();
ve.init();
/* get the Template */
Template t = ve.getTemplate( "sayHello.vm"
);
/* create a contex */
VelocityContext context = new VelocityContext();
context.put("name",
"John");
StringWriter writer = new StringWriter();
t.merge( context, writer );
System.out.println( writer.toString()
);
}
}
Output :
Please see below Name is replaced with
"John"
Hello John ! How are you ?
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