June 2004
Intermediate to advanced
480 pages
14h 30m
English
Content preview from Programming Jakarta Struts, Second Edition
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Logic Tags
The Logic tag library contains tags that are useful for managing conditional generation of output text, looping over object collections for repetitive generation of output text, and application flow management. Table 8-5 lists the tags available within the Logic tag library.
Table 8-5. Custom tags within the Logic tag library
|
Tag name |
Description |
|---|---|
empty |
Evaluate the nested body content of this tag if the requested variable is either null or an empty string. |
equal |
Evaluate the nested body content of this tag if the requested variable is equal to the specified value. |
forward |
Forward control to the page specified by the
|
greaterEqual |
Evaluate the nested body content of this tag if the requested variable is greater than or equal to the specified value. |
greaterThan |
Evaluate the nested body content of this tag if the requested variable is greater than the specified value. |
iterate |
Repeat the nested body content of this tag over a specified collection. |
lessEqual |
Evaluate the nested body content of this tag if the requested variable is less than or equal to the specified value. |
lessThan |
Evaluate the nested body content of this tag if the requested variable is less than the specified value. |
match |
Evaluate the nested body content of this tag if the specified value is an appropriate substring of the requested variable. |
messagesNotPresent |
Generate the nested body content of this tag if the specified message is not present in this request. |
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