JSTL <c:forEach >的使用

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

  <% 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]; 
      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

   <c:forEach var="prop" items="${numberMap}" begin="1" end="5">
     <c:out value="${prop.key}"/> = <c:out value="${prop.value }"/><br> <c:out value="${prop[key]}"/>
   </c:forEach>

九、和<fn:split>一起使用

           <c:forTokens items="${remind.remindWay}" delims="," var="i">

           </c:forTokens>

           <c:set var="array" value="${fn:split(remind.remindWay, ',')}" />
           <c:forEach var="i" items="${array}">
                <c:if test="${i eq '1'}">系统短信</c:if>
                <c:if test="${i eq '2'}">手机短信</c:if>
                <c:if test="${i eq '3'}">电子邮件</c:if>
           </c:forEach>

评论

2 楼 wubin1210 2013-03-18  

1 楼 yajie 2009-06-14  

关键的东西，你忘记写了