 | Please make sure you have read the Tag Syntax document and understand how tag attribute syntax works. |
Description
This tag can be used to parameterize other tags.
The include tag and bean tag are examples of such tags.
The parameters can be added with or without a name as key.
If the tag provides a name attribute the parameters are added using the
{@link Component#addParameter(String, Object) addParamter} method.
For unnamed parameters the Tag must implement the UnnamedParametric interface defined in
this class (e.g. The TextTag does this).
This tag has the following two paramters.
- name (String) - the name of the parameter
- value (Object) - the value of the parameter
Note:
When you declare the param tag, the value can be defined in either a
value attribute or
as text between the start and end tag. Struts behaves a bit different according to these two situations.
This is best illustrated using an example:
<param name="color">blue</param> <-- (A) -->
<param name="color" value="blue"/> <-- (B) -->
In the first situation (A) the value would be evaluated to the stack as a
java.lang.String object.
And in situation (B) the value would be evaluated to the stack as a
java.lang.Object object.
For more information see
WW-808.
Parameters
Dynamic Attributes Allowed: false |
|
Name | Required | Default | Evaluated | Type | Description |
---|
name | false | | false | String | Name of Parameter to set |
value | false | The value of evaluating provided name against stack | false | String | Value expression for Parameter to set |
Examples
where the key will be the identifier and the value the result of an OGNL expression run against the current
ValueStack.