如题所示,在做一个基于SSH框架的实战小项目时,发现不少地方都还在使用logic标签。这个标签不仅我不熟悉,而且在现在看来也显得过时了,因此我就想替换成我熟悉的JSTL标签
比如说,原来是这样的:
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< logic:present scope = "request" name = "onSaleGoodsList" >
< table border = "0" >
< s:iterator id = "goods" value = "#request.onSaleGoodsList" >
< tr >< td >
<!-- 显示在拍商品信息 --> < div class = "goods_pic" >< img src = "/zxpm/${goods.goodsPic}" title = "${goods.goodsDesc}" style = "width:100px;border:dashed 1px green;" ></ img ></ div ></ td >
< td valign = "top" >< div class = "goods_info" style = "border:solid 0px blue;" >
< span class = "info_title" >商品名称</ span > < strong >${goods.goodsName}</ strong >< br />
< span class = "info_title" >卖 家</ span > < em >${goods.saler.userName}</ em > < br />
< span class = "info_title" >起 拍 价</ span > < span style = "color:green;" >${goods.goodsPrice}</ span >< br />
<!-- 如果用户已经登录,且不是该商品的卖家,则在该商品旁显示“出价”按钮 -->
< logic:notEmpty name = "user" scope = "session" >
< logic:notEqual name = "goods" property = "saler.userId" value = "${sessionScope.user.userId}" >
< a class = "a_button" href = "/zxpm/goods/doBid?goods.goodsId=${goods.goodsId}" >< font color = "red" >我要出价</ font ></ a >
</ logic:notEqual >
</ logic:notEmpty >
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可以发现,这里面主要有一个logic:present,logic:notEmpty,logic:notEqual。虽然没用过,但是根据字面意思还是可以猜出是干什么的,因此就好替换了
(1)删掉跟logic:present相关的内容,因为不需要
(2)引入JSTL标签库:<%@ taglib prefix=”c” uri=”http://java.sun.com/jsp/jstl/core” %>
(3)logic:notEmpty和logic:notEqual都替换成一个c:if标签
需要注意的是,c:if中的“空”不能用xxx == null这种形式来表示,而是empty xxx ;其次,如果c:if里有多个判断语句需要用 and 来连接,而不是 || 的形式
因此,上面那一段替换之后的效果是这样的:
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< s:iterator var = "goods" value = "#request.onSaleGoodsList" >
< tr >
< td >
<!-- 显示在拍商品信息 -->
< div class = "goods_pic" >
< img src = "/OnlineAuction/uploadImages/${goods.goodsPic}" title = "${goods.goodsDesc}"
style = "width: 100px; border: dashed 1px green;" ></ img >
</ div >
</ td >
< td valign = "top" >< div class = "goods_info"
style = "border: solid 0px blue;" >
< span class = "info_title" >商品名称</ span > < strong >${goods.goodsName}</ strong >< br />
< span class = "info_title" >卖 家</ span > < em >${goods.saler.userName}</ em >
< br /> < span class = "info_title" >起 拍 价</ span > < span
style = "color: green;" >${goods.goodsPrice}</ span >< br />
<!-- 如果用户已经登录,且不是该商品的卖家,则在该商品旁显示“出价”按钮 -->
< c:if test = "${!empty sessionScope.user and goods.saler.userId != sessionScope.user.userId }" >
< a class = "a_button"
href = "/OnlineAuction/goods/doBid.action?goods.goodsId=${goods.goodsId}" >< font
color = "red" >我要出价</ font ></ a >
</ c:if >
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我碰到的情况主要就是这些了,根据意思相应的替换就行,难度不大
本文转自 pangfc 51CTO博客,原文链接:http://blog.51cto.com/983836259/1741694,如需转载请自行联系原作者