Struts2 struts标签

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1.index.jsp

<body>访问属性<a href="tags.action?username=u&password=p">tags</a></body>

2.struts.xml

<struts> <constant name="struts.enable.DynamicMethodInvocation" value="true" /> <constant name="struts.devMode" value="true" /> <constant name="struts.ui.theme" value="simple"/> <package name="tags" extends="struts-default"> <action name="tags" class="com.wxh.action.TagsAction"> <result>/tags.jsp</result> </action>  </package></struts>

3.tags.jsp

<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 设定为HTML:<s:property value="'<hr/>'" escape="true"/></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 设定范围：<s:set name="adminPassword" value="password" scope="page"/></li><li>从相应的范围取值：<%=pageContext.getAttribute("adminPassword")%></li> <li>set 设定var,范围为ActionContext:<s:set name="adminPassword" value="password" var="a"/></li><li>使用#取值:<s:property value="#a"/></li><hr/><li>bean 定义bean，并使用param来设定新的属性值；<s:bean name="com.wxh.action.Dog"><s:param name="name" value="'smalldog'"></s:param></s:bean><li>bean查看debug情况：<s:bean name="com.wxh.action.Dog" var="myDog"></s:bean></li><hr/><li>include include1.html 包含静态英文文件<s:include value="/include1.html"></s:include></li><li>include include2.html 包含静态中文文件<s:include value="/include2.html"></s:include></li><li>include include1.html 包含静态英文文件，说明%用法<s:set var="incPage" value="'/include1.html'"/><s:include value="%{#incPage}"></s:include></li><hr/><li><s:fielderror fieldName="fielderror.test" theme="simple"></s:fielderror></li><hr/><li>if elseif else:age=<s:property value="#parameters.age[0]"/><br/><s:if test="#parameter.age[0]<0">wrong age!</s:if><s:elseif test="#parameter.age[0]<20">too young!</s:elseif><s:else>yeah!</s:else><br/> <s:if test="#parameters.aaa==null">null</s:if></li><hr/><li>遍历集合：<br/><s:iterator value="{1,2,3}"><s:property/></s:iterator></li><li>自定义变量：<br/><s:iterator value="{'aaa','bbb','ccc'}" var="x"><s:property value="#x.toUpperCase()"/></s:iterator></li><li>使用status:<br/><s:iterator value="{'aaa','bbb','ccc'}" status="status"><s:property/>|遍历过得元素总数：<s:property value="#status.count"/>|遍历过得元素索引：<s:property value="#status.index"/>|当前是偶数?：<s:property value="#status.even"/>|当前是奇数?：<s:property value="#status.odd"/>|是第一个元素吗？：<s:property value="#status.first"/>|是最后一个元素吗？：<s:property value="#status.last"/><br/></s:iterator></li><li><s:iterator value="#{1:'a',2:'b',3:'c'}" ><s:property value="key"/>|<s:property value="value"/><br/></s:iterator></li> <li><s:iterator value="#{1:'a',2:'b',3:'c'}"  var="x"><s:property value="#x.key"/>|<s:property value="#x.value"/><br/></s:iterator></li> <s:debug></s:debug></ol></body>

4.TagsAction.java

package com.wxh.action;import com.opensymphony.xwork2.ActionSupport;public class TagsAction extends ActionSupport{private String password;private String username;public TagsAction(){}public String execute(){this.addFieldError("fielderror.test","wrong!");return SUCCESS;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}}

5.Dog.java

package com.wxh.action;public class Dog {public Dog(){}public Dog(String anme){super();this.name=name;}private String name;public String getName() {return name;}public void setName(String name) {this.name = name;}public String toString(){return "dog:"+name;}}

6.S.java

package com.wxh.action;public class S {public static String STR="STATIC STRING";public static String s(){return "static method";}}

7.User.java

package com.wxh.action;public class User {private int age;public User(){System.out.println("user.constructor!");}public User(int age){super();this.age=age;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}public String toString(){return "user"+age;}}

8.include1.html

<body>include1.html</body>

9.include2.html

<body>中文</body>

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