struts2系列十七之常用的struts标签set,property,iterator,include,if,error,判断奇偶

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<%@ taglib uri="/struts-tags"prefix="s"%>

 

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<head>

<metahttp-equiv="Content-Type"content="text/html; charset=GB18030"/>

<title>Struts-Tags学习</title>

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<body>

   <ol>

      <li>property:<s:property value="username"/></li>

      <li>property 取值为字符串:<s:property value="'username'"/></li>

      <li>property 设定默认值:<s:property value="admin"default="管理员"/></li>

      <li>property 设定HTML:<s:property value="'<hr/>'"escape="false"/></li>

      <hr/>

      <li>set 设定adminName值(默认为request 和ActionContext):<s:set var="adminName" value="username"/></li>

     

      <li>set 从request取值:<s:property value="#request.adminName"/></li>

      <li>set 从ActionContext取值:<s:property value="#adminName"/></li>

 

      <li>set 设定var,范围为ActionContext:<s:set var="adminPassword"value="password"scope="session"/></li>

      <li>set 使用#取值:<s:property value="#adminPassword"/></li>

      <li>set 从相应范围取值:<s:property value="#session.adminPassword"/></li>

     

      <hr/>

     

 

     

      <hr/>

      <li>bean 定义bean,并使用param来设定新的属性值:

         <s:beanname="com.bjsxt.struts2.tags.Dog">

            <s:paramname="name"value="'pp'"></s:param>

            <s:propertyvalue="name"/>

           

         </s:bean>

        

        

      </li>

     

      <li>bean 查看debug情况:

         <s:beanname="com.bjsxt.struts2.tags.Dog"var="myDog">

            <s:paramname="name"value="'oudy'"></s:param>

         </s:bean>

         拿出值:

         <s:propertyvalue="#myDog.name"/>

        

      </li>

      <hr/>

     

      <li>include_include1.html 包含静态英文文件

      <s:includevalue="/_include1.html"></s:include>

      </li>

     

      <li>include_include2.html 包含静态中文文件

      <s:includevalue="/_include2.html"></s:include>

      </li>

     

      <li>include_include1.html 包含静态英文文件,说明%用法

      <s:setvar="incPage"value="%{'/_include1.html'}"/>

      <s:includevalue="%{#incPage}"></s:include>

      </li>

     

     

      <hr/>

     

      <li>ifelseifelse:

      age = <s:propertyvalue="#parameters.age[0]"/><br />

      <s:setvar="age"value="#parameters.age[0]"/>

      <s:iftest="#age < 0">wrong age!</s:if>

      <s:elseiftest="#parameters.age[0]<20">tooyoung!</s:elseif>

      <s:else>yeah!</s:else><br/>

     

      <s:iftest="#parameters.aaa== null">null</s:if>

      </li>

     

      <hr/>

     

      <li>遍历集合:<br/>

      <s:iteratorvalue="{1, 2,3}">

         <s:property/> |

      </s:iterator>

      </li>

      <li>自定义变量:<br/>

      <s:iteratorvalue="{'aaa', 'bbb','ccc'}"var="x">

         <s:propertyvalue="#x.toUpperCase()"/> |

      </s:iterator>

      </li>

      <li>使用status:<br/>

      <s:iteratorvalue="{'aaa', 'bbb','ccc'}"status="status">

         <s:property/> |

         遍历过的元素总数:<s:propertyvalue="#status.count"/> |

         遍历过的元素索引:<s:propertyvalue="#status.index"/> |

         当前是偶数?:<s:propertyvalue="#status.even"/> |

         当前是奇数?:<s:propertyvalue="#status.odd"/> |

         是第一个元素吗?:<s:propertyvalue="#status.first"/> |

         是最后一个元素吗?:<s:propertyvalue="#status.last"/>

         <br/>

      </s:iterator>

     

      </li>

     

      <li>

      <s:iteratorvalue="#{1:'a',2:'b', 3:'c'}">

         <s:propertyvalue="key"/> |<s:property value="value"/><br />

      </s:iterator>

      </li>

     

      <li>

      <s:iteratorvalue="#{1:'a',2:'b', 3:'c'}"var="x">

         <s:propertyvalue="#x.key"/> |<s:property value="#x.value"/><br />

      </s:iterator>

      </li>

     

      <li>

     

      <s:fielderrorfieldName="fielderror.test"theme="simple"></s:fielderror>

     

      </li>

   </ol>

  

  

  

  

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