ognl的作用是什么_ognl_java(2)

效果如下图所示:

５)可以构造Map集合

实例:ognl_4.jsp

<%@ page language=java contentType=text/html; charset=UTF-8
    pageEncoding=UTF-8%>
<%@ taglib uri=/struts-tags prefix=s%>
<!DOCTYPE html PUBLIC -//W3C//DTD HTML 4.01 Transitional//EN http://.w3.org/TR/html4/loose.dtd>
<html>
<head>
<meta http-equiv=Content-Type content=text/html; charset=UTF-8>
<title>Insert title here</title>
</head>
<body>
    <!-- 能过#号构造Map集合 -->
    <s:iterator var= value=#{male:男,female:女 }>
        <br>
        <s:property value=key/>
        :
        <s:property value=value/>
    </s:iterator>
</body>
</html>

效果如下图所示:

用法一：引用变量

<s:textfield label=%{#request.usernameTip} name=username/>

用法二：引用常量

<s:textfield label=%{#request.usernameTip} name=username/>

实例:ognl_5.jsp

<%@ page language=java contentType=text/html; charset=UTF-8
    pageEncoding=UTF-8%>
<%@ taglib uri=/struts-tags prefix=s%>
<!DOCTYPE html PUBLIC -//W3C//DTD HTML 4.01 Transitional//EN http://.w3.org/TR/html4/loose.dtd>
<html>
<head>
<meta http-equiv=Content-Type content=text/html; charset=UTF-8>
<title>Insert title here</title>
</head>
<body>
    传统:<s:textfield label=用户名 name=username/><br><hr>
    现代:<s:textfield label=%{#request.usernameTip} name=username/><br><hr>
    现代2:<s:textfield label=%{#request.usernameTip} name=username/>
</body>
</html>

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