velocity怎么动态修改parse里的路径

velocity怎么动态修改parse里的路径

import java.io.StringWriter;
import java.io.Writer;

import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.Velocity;
import org.apache.velocity.tools.generic.RenderTool;

public class VMDemo {

public static void main(String[] args) throws Exception {
Velocity.init();
Template t = Velocity.getTemplate("./src/VMDemo.vm");

VelocityContext ctx = new VelocityContext();

Writer writer = new StringWriter();
t.merge(ctx, writer);

System.out.println(writer);
}
}