Detailed Jstl of the foreach label

Detailed Jstl of the foreach label

for loop control, it can set the collection (Collection) the members of the group are browsed through it sequentially.

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? <c:forEach> The syntax of the tag ? Description ? :

Syntax: Iterate over all members of a collection object

<C:foreach[Var= "VarName" ] items= "collection" [varstatus= "Varstatusname" [begin=< Span style= "COLOR: #2a00ff" > "Begin" [end= "End" [ step= "Step" ]> ???????? Ontology Content </c:foreach>

<c:forEach> Label's ? Property Description ? :

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<c:forEach> Label's ? Properties :? varstatus property: It provides four additional properties : Index,count,fist and the Last , they have a self-meaning as follows :

Property	Type	Significance
index	number
count	number
first	boolean
Last	Boolean	Now refers to whether the member is the last

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Example:

Servlet Code:

map<string, string> map = new hashmap<string, string> (); Map. Put ("1", "a"); Map. Put ("2", "B"); Map. Put ("3", "C"); Request. SetAttribute ("Map", map); Request. Getrequestdispatcher ("3.jsp"). Forward (request, response);

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JSP Code:

<C:foreachvar= "entry" Span style= "COLOR: #7f007f" >items= " ${map} " varstatus= "status" begin< Span style= "Color:black" >= "0" end= " ${map.size ()} " step= "1" > ???? Entry.key: <c:outvalue="${entry.key}"/>| ???? Entry.value: <c:outvalue="${entry.value}"/ >| ???????? ???? Status.index: <c:outvalue="${status.index}"/>| ???? Status.count: <c:outvalue="${status.count}"/>| ???? Status.first: <c:outvalue="${status.first}"/ >| ???? Status.last: <c:outvalue="${status.last}"/> ???? <br /> </C:foreach>

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The output is:

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Reference documents:

JSTL label Reference Manuals

Detailed Jstl of the foreach label