jstl core 的标签使用
jstl-core.jsp:
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<%@page import="java.util.Date, space.learn.jstl.Fruit"%>
<%@ taglib prefix='c' uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>jstl core taglib learn</title>
<style type="text/css">
body {background-color: black;color: white;}
span {text-align: center;color: green;background-color: yellow;}
.notice {color: rgb(250,37,62);}
hr { background-color: fuchsia; height: 5px;}
link {color: red;}
}
</style>
</head>
<body>
<% request.setAttribute("space","<font color=red>I am space.</font>"); %>
<span>c:out 输出信息：</span><br/>
<jsp:useBean id="str" class="String" />
<c:out value="${space}" /><br/>
<c:out value="${space}" escapeXml="false" /><br/>
<c:out value="${str_not_exist}" default="I don't know the time." /><br/>
<hr/>
<span>c:set 设置jsp作用域变量的属性：</span><br/>
没有测试成功 ...
<hr/>
<span>c:catch 捕捉异常：</span><br/>
没有尝试 ...
<hr/>
<span>c:if 条件语句：</span><br/>
<% request.setAttribute("fly", "true"); %>
<c:if test="${fly}" >
fly to the sky
</c:if>
<hr/>
<span>c:choose when otherwise 多次判断条件语句：</span><br/>
<% request.setAttribute("sky", true); %>
<c:choose>
<c:when test="${sky}">
sky==true
</c:when>
<c:otherwise>
sky==false
</c:otherwise>
</c:choose>
<hr/>
<span>c:forEach 循环语句：</span><br/>
<%
Integer[] nubs={0,1,2,3,4,5,6,7,8,9};
request.setAttribute("nubs",nubs);
%>
<c:forEach items="${nubs}" var="nub" begin="1" end="7" step="2">
${nub},
</c:forEach>
<hr/>
<span>forTokens使用多个分隔符</span><br/>
<c:forTokens items="A,B-C,D.E,F,G_HipHot@I" delims=",-_@." var="abc" varStatus="st">
${abc},index=${st.index}<br>
</c:forTokens>
<hr/>
<span>使用forEach分割字符串</span><br/>
<c:forEach items="使用,forEach,进行基本的分割,分割只能按照逗号,，" var="abc" varStatus="st">
${abc}<br>
</c:forEach>
<hr/>
<span>c:url 跳转：</span><br/>
<c:url value="http://g.cn" var="google">
<c:param name="str" value="java" />
</c:url>
<a href="${google}">google</a>
<hr/>
<span>c:redirect 重定向：</span><br/>
使用下面的语句可以重定向，为了防止重定向，注释掉了<br/>
<%-- <c:redirect url="${google}"></c:redirect> --%>
<hr/>
</body>
</html>
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