How Velocity works

When Using Velocity in an application or servlet, you need to do the following:

1. Initialize Velocity. Velocity provides two usage modes: single instance mode and single instance mode. The initialization process is only performed once.
2. Create context object
3. Add data objects to the context
4. Select Template
5. 'Merge' template and execute data output

In the code, by using the org. apache. velocity. app. Velocity class single instance mode

VelocityContext context = context. put ("name", String ("Velocity" Template template = Velocity. getTemplate ("mytemplate. vm "StringWriter sw = template. merge (context, sw );

This is a basic form, which is very simple, right? This is what you do when using Velocity to present a template. You may not need to write code like this-we provide some tools to make it easier to use. In any case, no matter how Velocity is used, the above execution sequence will actually happen in the background.