& Lt; c: forEach & gt; label, foreach label

<C: forEach> label and foreach label

<C: forEach> A tag is used for general data loops. It has the following attributes:

Genus	Description	Required?	Default Value
Items	Cyclic Project	No	None
Begin	Start Condition	No	0
End	End Condition	No	The last project in the collection.
Step	Step Size	No	1
Var	Variable name of the current project	No	None
VarStatus	Variable that shows the loop status	No	None

VaStatus attributes

The varStatus attribute in JSTL is the same as the varStatus attribute. varStatus is used to create a variable with a limited scope. However, the variable named by the varStatus attribute does not store the current index value or the current element, but is assigned to an instance of the javax. servlet. jsp. jstl. core. LoopTagStatus class. This class defines a set of features that describe the current state of iteration. These features are listed below:

Feature Getter description current getCurrent () index getIndex () index of the current iteration (in the Set) current iteration index from 0 count getCount () first isFirst () indicates whether the current iteration is the first iteration () indicates whether the current iteration is the sign of the last iteration. The begin getBegin () begin attribute value end getEnd () end attribute value step getStep () step Attribute Value

Use the vaStatus attribute in c: forEach to obtain the iteration status, for example:
<C: forEach var = "" items = "" varStatus = "status">
<C: out value = "$ {status. current}"/> current object
<C: out value = "$ {status. index}"/> index of this iteration
<C: out value = "$ {status. count}"/> number of iterations
<C: out value = "$ {status. first}"/> whether it is the first iteration object
<C: out value = "$ {status. last}"/> whether it is the last iteration object
</C: forEach>

<C: forEach> the items attribute of the tag supports all standard set types provided by the Java platform. In addition, you can use this operation to iterate elements in an array (including an array of basic types. It supports the following Collection types and iteration elements:

Java. util. Collection: Elements obtained by calling iterator.

Java. util. Map: the Instance obtained through java. util. Map. Entry.

Java. util. Iterator: Iterator element.

Java. util. Enumeration: Enumeration element.

Object instance array: array element.

Basic Type value array: Elements of the encapsulated array.

String to be separated by commas (,): The Sub-String after segmentation.

Javax. servlet. jsp. jstl. SQL. Result: The row obtained by the SQL query.

 

From: http://www.cnblogs.com/draem0507/archive/2012/09/24/2699745.html

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