<%@ page language=
"java" import=
"java.util.*" pageEncoding=
"UTF-8"%> <%
@page import=
"com.rao.struts2.bean.Sex"%> <%@ taglib prefix=
"s" uri=
"/struts-tags"%> <!DOCTYPE HTML PUBLIC
"-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP
'OGNL1.jsp' starting page</title> <meta http-equiv=
"pragma" content=
"no-cache"> <meta http-equiv=
"cache-control" content=
"no-cache"> <meta http-equiv=
"expires" content=
"0"> <meta http-equiv=
"keywords" content=
"keyword1,keyword2,keyword3"> <meta http-equiv=
"description" content=
"This is my page"> <!-- <link rel=
"stylesheet" type=
"text/css" href=
"styles.css"> --> </head> <body> <% request.setAttribute(
"req",
"request scope"); request.getSession().setAttribute(
"sess",
"session scope"); request.getSession().getServletContext().setAttribute(
"app",
"aplication scope"); %>
1.通过ognl表达式获取 属性范围中的值 <br> <s:property value=
"#request.req" /> <br /> <s:property value=
"#session.sess" /> <br /> <s:property value=
"#application.app" /> <br /> <hr>
2.通过<SPAN style=
"BACKGROUND-COLOR: #fafafa">ognl表达式创建list 集合 ，并且遍历出集合中的值 <br> <s:set name=
"list" value=
"{'eeeee','ddddd','ccccc','bbbbb','aaaaa'}"></s:set> <s:iterator value=
"#list" var=
"o"> <!-- ${o }<br/> --> <s:property /> <br /> </s:iterator> <br /> <hr>
3.通过ognl表达式创建Map 集合 ，并且遍历出集合中的值 <br> <s:set name=
"map" value=
"#{'1':'eeeee','2':'ddddd','3':'ccccc','4':'bbbbb','5':'aaaaa'}"></s:set> <s:iterator value=
"#map" var=
"o"> <!-- ${o.key }->${o.value }<br/> --> <!-- <s:property value=
"#o.key"/>-><s:property value=
"#o.value"/><br/> --> <s:property value=
"key" />-><s:property value=
"value" /> <br /> </s:iterator> <br /> <hr>
4.通过ognl表达式 进行逻辑判断 <br> <s:
if test=
"'aa' in {'aaa','bbb'}"> aa 在 集合{
'aaa',
'bbb'}中； </s:
if> <s:
else> aa 不在 集合{
'aaa',
'bbb'}中； </s:
else> <br /> <s:
if test=
"#request.req not in #list"> 不 在 集合list中； </s:
if> <s:
else> 在 集合list中； </s:
else> <br /> <hr>
5.通过ognl表达式 的投影功能进行数据筛选 <br> <s:set name=
"list1" value=
"{1,2,3,4,5}"></s:set> <s:iterator value=
"#list1.{?#this>2}" var=
"o"> <!-- #list.{?#
this>
2}：在list1集合迭代的时候，从中筛选出当前迭代对象>
2的集合进行显示 --> ${o }<br /> </s:iterator> <br /> <hr>
5.通过ognl表达式 访问某个类的静态方法和值 <br> <s:property value=
"@java.lang.Math@floor(32.56)" /> <s:property value=
"@com.rao.struts2.action.OGNL1Action@aa" /> <br /> <br /> <hr>
6.ognl表达式 迭代标签 详细 <br> <s:set name=
"list2" value=
"{'aa','bb','cc','dd','ee','ff','gg','hh','ii','jj'}"></s:set> <table border=
"1"> <tr> <td> 索引 </td> <td> 值 </td> <td> 奇？ </td> <td> 偶？ </td> <td> 首？ </td> <td> 尾？ </td> <td> 当前迭代数量 </td> </tr> <s:iterator value=
"#list2" var=
"o" status=
"s"> <tr bgcolor=
"<s:if test="#s.even
">pink</s:if>"> <td> <s:property value=
"#s.getIndex()" /> </td> <td> <s:property /> </td> <td> <s:
if test=
"#s.odd">Y</s:
if> <s:
else>N</s:
else> </td> <td> <s:
if test=
"#s.even">Y</s:
if> <s:
else>N</s:
else> </td> <td> <s:
if test=
"#s.first">Y</s:
if> <s:
else>N</s:
else> </td> <td> <s:
if test=
"#s.isLast()">Y</s:
if> <s:
else>N</s:
else> </td> <td> <s:property value=
"#s.getCount()"/> </td> </tr> </s:iterator> </table> <br> <hr>
7.ognl表达式:
if/
else if/
else 详细<br> <% request.setAttribute(
"aa",
0); %> <s:
if test=
"#request.aa>=0 && #request.aa<=4"> 在
0-
4之间； </s:
if> <s:elseif test=
"#request.aa>=4 && #request.aa<=8"> 在
4-
8之间； </s:elseif> <s:
else> 大于
8； </s:
else> <br> <hr>
8.ognl表达式: url 详细<br> <% request.setAttribute(
"aa",
"sss"); %> <s:url action=
"testAction" namespace=
"/aa/bb"> <s:param name=
"aa" value=
"#request.aa"></s:param> <s:param name=
"id">
100</s:param> </s:url> <br/> <s:set name=
"myurl" value=
"'http://www.baidu.com'"></s:set> value以字符处理： <s:url value=
"#myurl"></s:url><br> value明确指定以ognl表达式处理: <s:url value=
"%{#myurl}"></s:url> <br> <hr>
9.ognl表达式: checkboxlist 详细<br>
1> .list 生成；~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br> name:checkboxlist的名字<br> list:checkboxlist要显示的列表<br> value:checkboxlist默认被选中的选项,checked=checked<br> <s:checkboxlist name=
"checkbox1" list=
"{'上网','看书','爬山','游泳','唱歌'}" value=
"{'上网','看书'}" ></s:checkboxlist> <br> 以上生成代码：<br> <xmp> <input type=
"checkbox" name=
"checkbox1" value=
"上网" id=
"checkbox1-1" checked=
"checked"/> <label
for=
"checkbox1-1" class=
"checkboxLabel">上网</label> <input type=
"checkbox" name=
"checkbox1" value=
"看书" id=
"checkbox1-2" checked=
"checked"/> <label
for=
"checkbox1-2" class=
"checkboxLabel">看书</label> <input type=
"checkbox" name=
"checkbox1" value=
"爬山" id=
"checkbox1-3"/> <label
for=
"checkbox1-3" class=
"checkboxLabel">爬山</label> <input type=
"checkbox" name=
"checkbox1" value=
"游泳" id=
"checkbox1-4"/> <label
for=
"checkbox1-4" class=
"checkboxLabel">游泳</label> <input type=
"checkbox" name=
"checkbox1" value=
"唱歌" id=
"checkbox1-5"/> <label
for=
"checkbox1-5" class=
"checkboxLabel">唱歌</label>" </xmp>
2> .Map 生成；~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br> name:checkboxlist的名字<br> list:checkboxlist要显示的列表<br> listKey:checkbox 的value的值<br> listValue:checkbox 的lablel(显示的值)<br> value:checkboxlist默认被选中的选项,checked=checked<br> <s:checkboxlist name=
"checkbox2" list=
"#{1:'上网',2:'看书',3:'爬山',4:'游泳',5:'唱歌'}" listKey=
"key" listValue=
"value" value=
"{1,2,5}" ></s:checkboxlist> <br> 以上生成代码：<br> <xmp> <input type=
"checkbox" name=
"checkbox2" value=
"1" id=
"checkbox2-1" checked=
"checked"/> <label
for=
"checkbox2-1" class=
"checkboxLabel">上网</label> <input type=
"checkbox" name=
"checkbox2" value=
"2" id=
"checkbox2-2" checked=
"checked"/> <label
for=
"checkbox2-2" class=
"checkboxLabel">看书</label> <input type=
"checkbox" name=
"checkbox2" value=
"3" id=
"checkbox2-3"/> <label
for=
"checkbox2-3" class=
"checkboxLabel">爬山</label> <input type=
"checkbox" name=
"checkbox2" value=
"4" id=
"checkbox2-4"/> <label
for=
"checkbox2-4" class=
"checkboxLabel">游泳</label> <input type=
"checkbox" name=
"checkbox2" value=
"5" id=
"checkbox2-5" checked=
"checked"/> <label
for=
"checkbox2-5" class=
"checkboxLabel">唱歌</label> </xmp> <hr>
10.ognl表达式: s:radio 详细<br> <% Sex sex1 =
new Sex(
1,
"男"); Sex sex2 =
new Sex(
2,
"女"); List<Sex> list =
new ArrayList<Sex>(); list.add(sex1); list.add(sex2); request.setAttribute(
"sexs",list); %> 这个与checkboxlist差不多；<br>
1>.如果集合为javabean：<s:radio name=
"sex" list=
"#request.sexs" listKey=
"id" listValue=
"name"></s:radio><br>
2>.如果集合为list：<s:radio name=
"sexList" list=
"{'男','女'}"></s:radio><br>
3>.如果集合为map：<s:radio name=
"sexMap" list=
"#{1:'男',2:'女'}" listKey=
"key" listValue=
"value"></s:radio><br> <hr>
11.ognl表达式: s:select 详细<br> 这个与s:checkboxlist差不多；<br>
1>.如果集合为javabean：<s:select name=
"sex" list=
"#request.sexs" listKey=
"id" listValue=
"name"></s:select><br>
2>.如果集合为list：<s:select name=
"sexList" list=
"{'男','女'}"></s:select><br>
3>.如果集合为map：<s:select name=
"sexMap" list=
"#{1:'男',2:'女'}" listKey=
"key" listValue=
"value"></s:select><br> 到此主要的ognl</SPAN>标签已经介绍完毕...由于表单标签相对简单不介绍了.... </body> </html>
