struts2 标签

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OGNL(object-graph navigation label)

分类：表单标签，非表单标签，逻辑控制标签，数据访问标签

表单标签

index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%><%@ taglib prefix="s" uri="/struts-tags" %><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>    <base href="<%=basePath%>">     </head>    <body>    <s:form method="post" action="loginAction">    <s:textfield label="username" name="user.username"/>    <s:password label="password" name="user.password"/>    <s:checkboxlist list="{'book','ball','tea'}" label="interest" name="interest"/>    <s:checkboxlist list="#{'1':'book','2':'ball','3':'tea'}" label="interest" name="interest1"/>     <s:radio list="{'book','ball','tea'}" label="interest" name="interest3"/>    <s:radio list="#{'1':'book','2':'ball','3':'tea'}" label="interest" name="interest4"/>       <s:select multiple="true" list="#{'1':'book','2':'ball','3':'tea'}" label="interest" name="interest6"/>    <s:textarea name="hello" label="content" rows="50" cols="20"/>   <s:doubleselect doubleList="" list="" doubleName=""></s:doubleselect>    <s:submit value="submit"/>    </s:form>  </body></html>

逻辑控制标签

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%><%@ taglib prefix="s" uri="/struts-tags" %><%@ page import="bean.Em"  %><%request.setCharacterEncoding("utf-8");String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>    <base href="<%=basePath%>">      </head>    <body>  <!--struts2 中有一个默认的valuestack 所有的属性首先默认保存在其中  -->  <!--默认设置属性request和page范围内，可通过scope指定  --><%--   <s:set name="age" value=100/> --%>     <s:set name="age" value="60" scope="session"/>    <s:set name="booklist" value="{'hello','wang'}"/>;    <s:select label="书籍" list="#booklist"/>    <s:set name="bookmap" value="#{'1':'book','2':'sports','3':'music'} "/>    <s:select label="selectmap" list="#bookmap" listkey="key" listValue="value"/>    <!--获取属性，默认为request范围  --> <%--  <s:property value="age"/> --%> <s:property value="#session.age"/>  <s:property value="#booklist"/>  <s:property value="#booklist[0]"/>  <s:property value="#bookmap.keys"/>  <s:property value="#bookmap.values"/>    <s:set name="score" value="50"/>  <s:if test="#score>100">  good  </s:if>  <s:elseif test="#score>60">  nice  </s:elseif>  <s:else>  bad  </s:else>  <s:iterator value="#booklist" id="bookname">  <s:property vlaue="bookname"/>  </s:iterator>  <s:iterator value="#bookmap">  <s:property value="key"/>  <s:property value="value"/>  </s:iterator>    <!-- 模拟从action中传递过来一个集合 集合中是对象 -->  <%List<Em> list=new ArrayList<Em>();  list.add(new Em(1,"hello"));  list.add(new Em(2,"world"));  list.add(new Em(3,"hehe"));  request.setAttribute("list", list);   %>   <s:iterator value="#request.list" var="em"   begin="1" end="2" step="2"   >   <s:property value="#em.id"/>   <s:property value="#em.name"/>   </s:iterator>    <s:iterator value="#request.list" var="em"   status="st">   <s:if test="#st.index%2==0">   good   </s:if>   </s:iterator>  </body></html>

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