If contained with any LinksAttribute parent, adds the link data to the parent tag. Otherwise, renders a <link> tag.

Any attribute that has no namespace and begins with param. is added to the href as a URL parameter. The parameter name is the part of the attribute name following param..

When a parameter value is null it is not added. If the value is an Iterable, Iterator, Enumeration, or array, then each non-null element is coerced to String as a separate parameter in iteration order. Otherwise, the value itself is coerced to String for the parameter value.

Nested <ao:param> or <ao:params> tags will add parameters after any provided as attributes.

Tag Information

Tag Class: com.aoindustries.taglib.LinkTag
TagExtraInfo Class: None
Body Content: scriptless
Display Name: None
Dynamic Attributes: true


Name Required Evaluation Type Description
link No Runtime Link

An optional link to copy all the attributes from, as captured by a LinksAttribute parent tag.

href No Runtime String

The href for the link. The href is modified in several ways to make things much easier to work with.

A nested <ao:href> tag will override this value.

In order to make relative paths predictable, relative paths are interpreted from the current JSP page, as long as all includes have been done via <ao:include> and any forward via <ao:forward>.

In order to keep paths app-relative, if starts with a /, the context path will be prepended to the path.

In order to simplify things behind URL mapping schemes, the href is always written starting with '/'. This avoids any need to include any <ao:base> tags.

URL rewriting is performed as needed via HttpServletResponse.encodeURL.

To support paths in different character sets, a Unicode to ASCII URI encoding is performed on every character that is not defined in RFC 3986: Reserved Characters. To avoid ambiguity, any dynamic parameters or anchors in the URL must have been correctly encoded by the caller.

Any directly nested <ao:param> or <ao:params> tag will add parameters to the href.

absolute No Runtime boolean

When true, generates an absolute URL for the href for the link. Defaults to false.

canonical No Runtime boolean

When true, will generate a Canonical URL. Canonical URLs should be used where per-user response URL rewriting (such as information added when cookies are disabled) should be avoided. Defaults to false.

addLastModified No Runtime String

If the href represents a local resource, a parameter of "lastModified=#####" may be automatically added with the timestamp of the local resource to the nearest second. May be one of true, false, or auto. Defaults to auto.

In auto mode, last modified stamping may be disabled by the client with the X-com-aoindustries-servlet-lastmodified-enabled: false header.

In auto mode, last modified stamping is not performed on Canonical URLs.

hreflang No Runtime Object

The hreflang for the link. A nested <ao:hreflang> tag will override this value.

rel No Runtime String

The rel for the link. A nested <ao:rel> tag will override this value.

type No Runtime String

The type for the link. A nested <ao:type> tag will override this value.

media No Runtime String

The media type for the link.

title No Runtime Object

The title for the link. A nested <ao:title> tag will override this value.


No Variables Defined.