1. 條件標(biāo)簽 JSTL
<c:if test="${user.password == 'hello'}">
<c:choose>
<c:when test="${user.age <= 18}">
<font color="blue"/>
</c:when>
<c:when test="${user.age <= 30 && user.age > 18}">
<font color="red"/>
</c:when>
<c:otherwise>
<font color="green"/>
</c:otherwise>
</c:choose>
</c:if>
STRUTS2:
<s:if test="#user.age <= 18">
<font color="blue"/>
</s:if>
<s:elseif test="#user.age <= 30 && user.age > 18">
<font color="red"/>
</s:elseif>
<font color="green"/>
</s:else>
2. 迭代標(biāo)簽
JSTL:
<c:forEach var="user" items="${users}">
<c:out value="${user.userName}"/>
</c:forEach><!-- 迭代固定次數(shù) -->
<c:forEach var="i" begin="1" end="10" step="3">
<c:out value="${i}"/>
</c:forEach><!-- 這種循環(huán)相當(dāng)于for(int i=1; i<10; i++), 其中step是指迭代的步長,默認(rèn)為1. -->
struts2:
<s:iterator value="#users" status="stuts">
<s:if test="#stuts.odd == true"> <!-- 判斷是否為奇數(shù)行 -->
<s:property value="userName"/>
</s:if>
<s:else>
<s:property value="passWord"/>
</s:else>
</s:iterator>
3. URL相關(guān)標(biāo)簽 JSTL:
<!-- 絕對(duì)路徑 -->
<c:import url="http://127.0.0.1:8080/hello/hello.jsp"/><!-- 相對(duì)路徑 -->
<c:import url="hello.jsp"/><!-- Encode -->
<a href="<c:url value='hello.jsp'><c:param name='userName' value='cyanbomb' /></c:url>"></a><!-- 傳遞參數(shù)到指定的URL -->
<c:import url="hello.jsp" charEncoding="gb2312"> <c:param name="userName" value="cyanbomb"/></c:import><!-- URL重定向 -->
<c:redirect url="${myurl}"/><!-- 構(gòu)造URL -->
<c:url value="myurl" var="hello.jsp" scope="session"><c:param name="userName" value="cyanbomb"/></c:url>
Struts2:
<a href='<s:url value="/hello.jsp" />'>Hello</a><br />
<s:url id="url" value="/hello.jsp"><s:param name="name">cyanbomb</s:param></s:url>
<s:a href="%{url}">Hello</s:a>
解除的疑問，list遍歷問題
像這樣一個(gè)list,里面有3條記錄,每條記錄包含兩個(gè)對(duì)象,我把結(jié)果集(lstRooms)request到了頁面,想遍歷顯示RrmRooms里的id,和RrmRoomType里的name. 我用JSTL實(shí)現(xiàn)如下:
<table>
<c:forEach var="rm" items="${lstRooms}">
<tr>
<td>${rm[0].id}</td>
<td>${rm[1].name}</td>
<tr>
</c:forEach></table>
STRUTS2實(shí)現(xiàn)如下:
<table>
<s:iterator value="#lstRooms" status="stat">
<tr>
<td>
<s:property value="#lstRooms[#stat.index][0].id"/>
</td>
<td>
<s:property value="#lstRooms[#stat.index][1].name"/>
</td>
<tr>
</s:iterator>
</table>