Different types of Url-Patterns

Different types of Url-Patterns

According to Sun Microsystems, there are 3 types of url-patterns which can be

assigned to servlet program.

1. Exact Match

2. Directory Match

3. Extension Match

Exact Match

The exact match url-pattern must begin with ― / ‖ symbol and should not contain ― * ‖

symbol.

Ex: <url-pattern>/test1</url-pattern>

<url-pattern>/test1.xyz</url-pattern>

<url-pattern>/test1/test2</url-pattern>

<url-pattern>/test1/abc.do</url-pattern>

Directory Match

This url pattern must begin with ― / ‖ symbol and must end with ― * ‖ symbol.

Ex: <url-pattern>/x/y/*</url-pattern>

<url-pattern>/x/*</url-pattern>

<url-pattern>/test1/test2/*</url-pattern>

<url-pattern>/test1/abc.do/*</url-pattern>

Extension Match

This url-pattern must begin with ― * ‖ symbol and must end with extension letter or

extension word.

Ex: <url-pattern>*.abc</url-pattern>

<url-pattern>*.do</url-pattern>

<url-pattern>*.c</url-pattern>

Note

You cannot frame url-pattern for servlet program without following those 3 styles of

above url-patterns.

Ex: <url-pattern>/x/y/*.do</url-pattern>

Invalid url-pattern formation