import java.io.StringWriter; 
import org.apache.velocity.VelocityContext; 
import org.apache.velocity.Template; 
import org.apache.velocity.app.Velocity; 
import org.apache.velocity.exception.ResourceNotFoundException; 
import org.apache.velocity.exception.ParseErrorException; 
import org.apache.velocity.exception.MethodInvocationException; 
  
Velocity.init(); 
//1:构建一个上下文，用来存放数据(date)。 
VelocityContext context = new VelocityContext(); 
context.put( "name", new String("Velocity") ); 
Template template = null; 
try
{ 
   //2:读取模板（View） 
   template = Velocity.getTemplate("mytemplate.vm"); 
} 
catch( ResourceNotFoundException rnfe ) 
{ 
   // couldn't find the template 
} 
catch( ParseErrorException pee ) 
{ 
  // syntax error: problem parsing the template 
} 
catch( MethodInvocationException mie ) 
{ 
  // something invoked in the template 
  // threw an exception 
} 
catch( Exception e ) 
{} 
  
StringWriter sw = new StringWriter(); 
//3:组合(control)数据和模板，最后写到sw里，sw即最终数据。 
template.merge( context, sw );