Use JSTL tag library use
The first step: introducing jar package related to the WEB-INF / lib /, JSTL tag library (standard.jar, jstl.jar)
Second step: in a JSP file tag library is introduced through taglib directive, for example: <% @ taglib url = "http://java.sun.com/jsp/jstl/core" prefix = "c"%>
Third step: Examples using tags
1. <c: if test = "$ {200> 20}"> 200 indeed greater than 20 </ c: if>
And if the same program, in fact, the contents of test conditions to meet the conditions of the statement is executed, it is not satisfied is not performed
2.<c:forEach var = "i" begin = "1" end = "5">${ i }</c:forEach>
Iterative label to receive the plurality of collection type, var: loop variable name, begin: start element, end: the end of the element, step: iteration step, varStatus: circulation state name
3. The following is a combination tag, corresponds to switch-case structure in java
<c:choose>
Itself only as a parent tag when and otherwise
<c:when test = ""></c:when>
Used to judge whether the conditions established
<c:when test = ""></c:when>
<c:otherwise></c:otherwise>
When the above are false label when the time will perform
</c:choose>