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struts2标签

时间:2016-08-04 23:08:43      阅读:257      评论:0      收藏:0      [点我收藏+]

标签:

$用于i18n和struts2配置文件

#用于取得ActionContext的值

%将原本的文本属性解析为ognl,对于本来就是ognl的属性不起作用

 

struts.xml简单配置

技术分享
<package name="tags" namespace="/" extends="struts-default">
        <action name="tags" class="com.ouc.wkp.action.TagsAction">
            <result>/tags.jsp</result>
        </action>
    </package>
struts.xml

 

技术分享
package com.ouc.wkp.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 String getUsername() {
        return username;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public void setUsername(String username) {
        this.username = username;
    }
}
TagsAction.java

 

然后下面的jsp展示了struts标签的用法

技术分享
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="/struts-tags" prefix="s"%>
<%
    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%>">

<title>My JSP ‘tags.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>
    This is my tags.jsp
    <br> property:
    <s:property value="username" />
    <br /> property取值为字符串:
    <s:property value="‘username‘" />
    <br /> property设定默认值:
    <s:property value="admin" default="管理员" />
    <br /> property设定HTML:
    <s:property value="‘<hr>‘" />
    <br /> property设定HTML:
    <s:property value="‘<hr>‘" escape="false" />
    <br />

    <br /> set设定adminName值(默认为request和ActionContext):
    <s:set var="adminName" value="username"></s:set>
    <br /> set从request取值:
    <s:property value="#request.adminName" />
    <br /> set从ActionContext取值:
    <s:property value="#adminName" />
    <br /> set设定范围:
    <s:set var="adminPassword" value="password" scope="page"></s:set>
    <br /> set从相应范围取值:<%=pageContext.getAttribute("adminPassword")%><br />

    set设定scope,范围为session:
    <s:set var="adminPassword" value="password" scope="session"></s:set>
    <br /> set使用#取值:
    <s:property value="#adminPassword" />
    <br> set从相应范围取值:
    <s:property value="#session.adminPassword" />
    <br />

    <br /> bean定义bean,并使用param设定新的属性值
    <s:bean name="com.ouc.wkp.model.Dog">
        <s:param name="name" value="‘MZ‘"></s:param>
        <s:property value="name" />
        <br />
    </s:bean>

    bean 查看debug情况:
    <s:bean name="com.ouc.wkp.model.Dog" var="myDog">
        <s:param name="name" value="‘oudy‘"></s:param>
    </s:bean>
    拿出值:
    <s:property value="#myDog.name" />
    <br />

    <s:fielderror name="fielderror.test" theme="simple"></s:fielderror>
    <br /> if elseif else: age=
    <s:property value="#parameters.age[0]" />
    <br />
    <s:set var="age" value="#parameters.age[0]"></s:set>
    <s:if test="#age < 0">wrong age!</s:if>
    <s:elseif test="#parameters.age[0]<20">too young!</s:elseif>
    <s:else>yes!</s:else>

    <s:if test="#parameters.aaa==null">null</s:if>
    <s:debug></s:debug>
    <br /> 遍历集合
    <br />
    <s:iterator value="{1,2,3}">
        <s:property />|
     </s:iterator>
    <br /> 自定义变量
    <br />
    <s:iterator value="{‘aaa‘,‘bbb‘,‘ccc‘}" var="x">
        <s:property />
        <s:property value="#x.toUpperCase()" />
    </s:iterator>
    <br /> 使用status:
    <br />
    <s:iterator value="{‘aaa‘,‘bbb‘,‘ccc‘}" status="status">
        <s:property />
         遍历过的元素总数:<s:property value="#status.count" />|
         遍历过的元素索引:<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 />
        
        遍历Map 方法1
        <s:iterator value="#{1:‘a‘,2:‘b‘,3:‘c‘}">
            <s:property value="key" />|<s:property value="value" />
            <br />
        </s:iterator>
        方法2
        <s:iterator value="#{1:‘a‘,2:‘b‘,3:‘c‘}" var="x">
            <s:property value="#x.key" />|<s:property value="#x.value" />
            <br />
        </s:iterator>

    </s:iterator>

</body>
</html>
tags.jsp

 

ui标签感觉不太实用

struts2标签

标签:

原文地址:http://www.cnblogs.com/wangkaipeng/p/5738520.html

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