一个关于jstl中<c:forEach的有关问题
日期：2014-05-18 浏览次数：20713 次
一个关于jstl中<c:forEach的问题
<%@ page language= "java " import= "java.util.* " pageEncoding= "UTF-8 "%>
<%@ taglib prefix= "c " uri= "/WEB-INF/c.tld " %>
<%@ taglib prefix= "c1 " uri= "/WEB-INF/c-1_0.tld " %>
<%@ taglib prefix= "c2 " uri= "/WEB-INF/c-1_0-rt.tld " %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN ">
<html>
<head>
<title> jstl简单测试 </title>
</head>
<body>
<%
String[] strsList={ "1111 ", "22222 ", "33333 "};
String[] tList={ "a ", "b ", "c "};
%>
<table width= "300 " border= "1 ">
<c:forEach var= "strs " items= "${tList} ">
<tr>
<td> ${strs} </td>
</tr>
</c:forEach>
</table>
<table width= "300 " border= "1 ">
<c:forEach var= "x " begin= "0 " end= "10 " step= "2 ">
<tr>
<td> <c:out value= "${x} "/> </td>
<td> <c:out value= "${x * x} "/> </td>
</tr>
</c:forEach>
</table>
</body>
</html>
我的引入是对的,为什么下面输出数字是正常的,而上面我输出数组时却没有效果(无输出,也不提示错误).
------解决方案--------------------
你需要把数据添加到 page 或者 request 中就可以了。
------解决方案--------------------
<%
String[] tList={ "a ", "b ", "c "};
request.setAttribute( "tList ", tList);
%>
<table width= "300 " border= "1 ">
<c:forEach var= "strs " items= "${tList} ">
<tr>
<td> ${strs} </td>
</tr>
</c:forEach>
</table>
<%@ page language= "java " import= "java.util.* " pageEncoding= "UTF-8 "%>
<%@ taglib prefix= "c " uri= "/WEB-INF/c.tld " %>
<%@ taglib prefix= "c1 " uri= "/WEB-INF/c-1_0.tld " %>
<%@ taglib prefix= "c2 " uri= "/WEB-INF/c-1_0-rt.tld " %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN ">
<html>
<head>
<title> jstl简单测试 </title>
</head>
<body>
<%
String[] strsList={ "1111 ", "22222 ", "33333 "};
String[] tList={ "a ", "b ", "c "};
%>
<table width= "300 " border= "1 ">
<c:forEach var= "strs " items= "${tList} ">
<tr>
<td> ${strs} </td>
</tr>
</c:forEach>
</table>
<table width= "300 " border= "1 ">
<c:forEach var= "x " begin= "0 " end= "10 " step= "2 ">
<tr>
<td> <c:out value= "${x} "/> </td>
<td> <c:out value= "${x * x} "/> </td>
</tr>
</c:forEach>
</table>
</body>
</html>
我的引入是对的,为什么下面输出数字是正常的,而上面我输出数组时却没有效果(无输出,也不提示错误).
------解决方案--------------------
你需要把数据添加到 page 或者 request 中就可以了。
------解决方案--------------------
<%
String[] tList={ "a ", "b ", "c "};
request.setAttribute( "tList ", tList);
%>
<table width= "300 " border= "1 ">
<c:forEach var= "strs " items= "${tList} ">
<tr>
<td> ${strs} </td>
</tr>
</c:forEach>
</table>
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