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jstl之forEach循环

2013-05-11 14:46 309 查看

<%@ page contentType="text/html; charset=GBK" %>

<%@ page import="java.util.*" %>

<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %>

<html>

<head>

    <title>JSTL测试1--c:forEach循环</title>

</head>

<body>

一、整数

    <c:forEach var="i" begin="1" end="10" step="1">

      <c:out value="${i}" />,

    </c:forEach><p>

二、计算x的平方

   <table>

   <tr><th>Value</th>

    <th>Square</th></tr>

    <c:forEach var="x" begin="0" end="10" step="2">

    <tr><td><c:out value="${x}"/></td>

        <td><c:out value="${x * x}"/></td></tr>

   </c:forEach>

</table> <p>

三、字符串"47,52,53,55,46,22,16,2" 分隔.

   <table border="1">

   <c:forTokens items="47,52,53,55,46,22,16,2" delims="," var="dailyPrice">

    <tr><td><c:out value="${dailyPrice}"/></td></tr>

   </c:forTokens>

   </table><p>

四、使用步长

   <table>

    <tr><th>second</th>

    <th>second</th></tr>

    <c:forEach var="seconds" begin="0" end="${pageContext.session

.maxInactiveInterval}" step="60">

    <tr><td><c:out value="${seconds}"/></td>

        <td><c:out value="${seconds}"/></td></tr>

   </c:forEach>

</table> <p>

五、对数组进行循环<p>

<% int ai[] = {10, 20, 30, 40, 50};

pageContext.setAttribute("ary", ai);

%>

<c:forEach var="i" items="${ary}">

    <c:out value="${i}"/>*

</c:forEach><p>

<%

   Cookie c=new Cookie("cookie1","one");

   response.addCookie(c);

%>

<%

Cookie cookies[]=request.getCookies();

Cookie sCookie=null;

String sname=null;

String name=null;

if(cookies==null) // 如果没有任何cookie

    out.print("none any cookie");

else

{

    //out.print(cookies.length + "<br>");

    for(int i=0;i<cookies.length; i++) // 循环列出所有可用的Cookie

    {

     sCookie=cookies[i];     [转自:51item.net]

      sname=sCookie.getName();

      name = sCookie.getValue();

      out.println(sname + "->" + name + "<br>");

    }

}

%>



<table border="1" align="center">

   <tr><th>Cookie Name</th>

    <th>Cookie Value</th></tr>

    <c:forEach var="cook" items="${pageContext.request.cookies}">

    <tr><td><c:out value="${cook.name}"/></td>

        <td><c:out value="${cook.value}"/></td></tr>

   </c:forEach>

</table> <p>

六、字符串数组循环

<% String as[] = {

            "A first string", "La deuxieme string", "Ella troisiemo stringo"

        };

        request.setAttribute("stringArray", as);

%><p>

<c:forEach var="string" items="${stringArray}">

<c:out value="${string}"/><br>

</c:forEach>

七、枚举

<%

Hashtable hashtable1 = new Hashtable();

           pageContext.setAttribute("numberMap", hashtable1);



        hashtable1.put(new Integer(1), "uno");

        hashtable1.put(new Integer(2), "dos");

        hashtable1.put(new Integer(3), "tres");

        hashtable1.put(new Integer(4), "cuatro");

        hashtable1.put(new Integer(5), "cinco");

        hashtable1.put(new Integer(6), "seis");

        hashtable1.put(new Integer(7), "siete");

        hashtable1.put(new Integer(8), "ocho");

        hashtable1.put(new Integer(9), "nueve");

        hashtable1.put(new Integer(10), "diez");

        java.util.Enumeration enumeration = hashtable1.keys();

        pageContext.setAttribute("enumeration", enumeration);

%>

   <c:forEach var="item" items="${enumeration}" begin="2" end="10" step="2">

     <c:out value="${item}"/><br>

   </c:forEach><p>

八、map<p>

   <c:forEach var="prop" items="${numberMap}" begin="1" end="5">

     <c:out value="${prop.key}"/> = <c:out value="${prop.value}"/><br>

   </c:forEach>



</body>

</html>

转自http://www.cnblogs.com/anuoruibo/archive/2012/06/13/2547834.html

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标签： jstl

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