javax.servlet.annotation

Annotation Type WebFilter

@Target(value=TYPE)
 @Retention(value=RUNTIME)
 @Documented
public @interface WebFilter

The annotation used to declare a Servlet Filter.

This annotation will be processed by the container during deployment, the Filter class in which it is found will be created as per the configuration and applied to the URL patterns, Servlets and DispatcherTypes.

If the name attribute is not defined, the fully qualified name of the class is used.

At least one URL pattern MUST be declared in either the value or urlPattern attribute of the annotation, but not both.

The value attribute is recommended for use when the URL pattern is the only attribute being set, otherwise the urlPattern attribute should be used.

The annotated class MUST implement Filter. E.g. @WebFilter("/path/*")
public class AnExampleFilter implements Filter { ...

Since:

Servlet 3.0 (Section 8.1.2)

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
boolean	asyncSupported
java.lang.String	description
DispatcherType[]	dispatcherTypes
java.lang.String	displayName
java.lang.String	filterName
WebInitParam[]	initParams
java.lang.String	largeIcon
java.lang.String[]	servletNames
java.lang.String	smallIcon
java.lang.String[]	urlPatterns
java.lang.String[]	value A convenience method, to allow extremely simple annotation of a class.

Element Detail

description

public abstract java.lang.String description

Returns:

description of the Filter, if present

Default:

""

displayName

public abstract java.lang.String displayName

Returns:

display name of the Filter, if present

Default:

""

initParams

public abstract WebInitParam[] initParams

Returns:

array of initialization params for this Filter

Default:

{}

filterName

public abstract java.lang.String filterName

Returns:

name of the Filter, if present

Default:

""

smallIcon

public abstract java.lang.String smallIcon

Returns:

small icon for this Filter, if present

Default:

""

largeIcon

public abstract java.lang.String largeIcon

Returns:

the large icon for this Filter, if present

Default:

""

servletNames

public abstract java.lang.String[] servletNames

Returns:

array of Servlet names to which this Filter applies

Default:

{}

value

public abstract java.lang.String[] value

A convenience method, to allow extremely simple annotation of a class.

Returns:

array of URL patterns

See Also:

urlPatterns()

Default:

{}

urlPatterns

public abstract java.lang.String[] urlPatterns

Returns:

array of URL patterns to which this Filter applies

Default:

{}

dispatcherTypes

public abstract DispatcherType[] dispatcherTypes

Returns:

array of DispatcherTypes to which this filter applies

Default:

javax.servlet.DispatcherType.REQUEST

asyncSupported

public abstract boolean asyncSupported

Returns:

asynchronous operation supported by this Filter

Default:

false