sttuth2的標籤

struts2標籤

終於把struts2標籤看的差不多了，不過還有好多還不是很熟悉，我是結合Max的struts2教程和struts自帶的reference文檔學習的！筆記中有好多都是從Max的博客中搬來的。不過也沒有辦法，咱水平還不行，也只能站在人家的肩膀上學習一下了！！

if，elseif， else標籤

<%@ 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">

  </head>

  <body>

    <!-- 

        小技巧：#parameters.country[1]可以這樣取值！原來Struts2是將URL傳的參數封裝 成一個數組的，

        也就是說你可以在一個URL傳兩個同名的參數（即?name=a&name=b）；

     -->

    <%request.setCharacterEncoding("utf-8");%>

    (request獲取方式)country=<%=request.getParameter("country") %><br>

    <s:if
test="#parameters.country[1] == 'www'">中國</s:if>

    <s:elseif test="#parameters.country[0] == '美國'">美國</s:elseif>

    <s:else
>其他國籍的人</s:else>

    <br>

    <!-- 爲某個屬性賦值 -->

    <s:set name="country"
value="#parameters.country[1]"></s:set>

    country=<s:property value="#country"
/> <br>    

    <s:if
test="#country == 'www'">中國</s:if>

    <s:elseif test="#country == '美國'">美國</s:elseif>

    <s:else
>其他國籍的人</s:else>

    <br>

  </body>

</html>

這裏面有個小常識，就是通過url傳遞參數的時候：Struts2是將URL傳的同名參數封裝成一個數組，也就是說我們可以在一個URL傳兩個同名的參數（即?name=a&name=b）；獲取的時候直接#parameters.name[0], parameters.name[1]就可以分別取出兩個參數的值。

include標籤

　　被包含頁面：

<%@ page language="java"
import="java.util.*"
pageEncoding="UTF-8"%>

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

this is the include page!!!

　　包含頁面：

<%@ 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
'includea.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" mce_href="styles.css">

    -->

    </head>

    <body>

        This is my JSP1 page.

        <br>

        <s:include value="include.jsp">

            <!-- 提交表單時纔會獲得value的值 -->

            <s:param name="value1">test1</s:param>

            <s:param name="value2"
value="user"></s:param>

        </s:include>

    </body>

</html> 

當然struts的include標籤靜態動態頁面都能包含的！

i18n標籤
描述：加載資源包到值堆棧。它可以允許text標誌訪問任何資源包的信息，而不只當前action相關聯的資源包。

<%@ 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
'tags3.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" mce_href="styles.css">

    -->

  </head>

  <body>

     <!-- <s:text>標籤沒弄明白 -->

     <s:i18n name="I18N">

        The i18n value is <s:text name="hi!!"></s:text>

     </s:i18n>

     <br>

     <s:debug></s:debug>

  </body>

</html>

iterator標籤

<%@ 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
'tags2.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" mce_href="styles.css">

    -->

  </head>  

  <% 

    List<String> strs =
new ArrayList<String>();

    strs.add("a");

    strs.add("b");

    strs.add("c");

    strs.add("d");

    strs.add("e");     

    request.setAttribute("strs", strs);

  %>

  <body>

    <s:iterator value="#request.strs"
var="strs">

        <s:property value="#strs"/>

    </s:iterator>

    <s:debug></s:debug>

  </body>

</html>

這個標籤挺容易理解的。

param標籤

struts2的<s: param>標籤問我覺得比較複雜的。struts2的s:param標籤主要有兩個屬性name與value, 若想在value屬性中輸入直接量,則可以這樣寫:<s:param name="some" value="%{'user'}"/>, 也可以這樣寫:<s:param name="some">user</s:param>。但如果直接賦值，這個值不是由Action動態生成的，而是自己指定的一個字符串，則只能用後者。

param頁面代碼：

<%@ 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
'param.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" mce_href="styles.css">

    -->

  </head>

  <body>

    <!-- struts2的s:param標籤主要有兩個屬性name與value,

    若想在value屬性中輸入直接量,則可以這樣寫:<s:param name="some"
value="%{'user'}"/>,

    也可以這樣寫:<s:param name="some">user</s:param>。

    但如果直接賦值，這個值不是由Action動態生成的，而是自己指定的一個字符串，則只能用後者。 -->

    <s:url value="paramAction.jsp"
id="href">

        <s:param name="value1">hello!!</s:param>

        <s:param name="valu2"
value="%{'HELLO!'}"></s:param>

    </s:url>

    <s:a href="%{href}"
mce_href="%{href}">paramAction</s:a>

    <s:debug></s:debug>

  </body>

</html>

paramAction頁面：

<%@ 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
'paramAction.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" mce_href="styles.css">

    -->

  </head>

  <body>

    value1的值：<%=request.getParameter("value1") %><br>

    value1的值：<s:property value="#parameters.value1"
/><br>

    value2的值：<%=request.getParameter("value2") %><br/><!-- 獲取不到值 -->

    value2的值：${#param.value2 }<!-- 獲取不到值 -->

    <s:debug></s:debug>

  </body>

</html>

經常用到的UI標籤

<%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"

%>

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

%>

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

%>

<%@ taglib prefix="sx" uri="/struts-dojo-tags"

%>

<html>

<head>

<title>UI Tags Example</title>

<s:head />

<sx:head parseContent="true"

/>

</head>

<body>

<s:actionerror/>

<s:actionmessage/>

<s:fielderror />

<s:form action="exampleSubmit" method="post"


enctype=

"multipart/form-data"


tooltipConfig=

"#{'jsTooltipEnabled':'true'}">

<s:textfield

label="Name"

name="name"

tooltip="Enter your Name here" />

<s:date name="Select Your Birthday"

/>

<!-- 在struts2.2.1中<sx:datetimepicker/>的標籤使用有所變化，需要引入struts2-dojo-plugin-2.2.1

.jar

這個包。

-->

<sx:datetimepicker

tooltip="Select Your Birthday"

label="Birthday"

name="birthday" />

<s:textarea

tooltip="Enter your Biography"

label="Biograph"

name="bio"

cols="20"

rows="3"/>

<s:select

tooltip="Choose Your Favourite Color"

label="Favorite Color"

list="{'Red', 'Blue', 'Green'}"

name="favoriteColor"

emptyOption="true"

headerKey="None"

headerValue="None"/>

<s:select

tooltip="Choose Your Favourite Language"

label="Favourite Language"

list="#{'CN':'中文','EN':'英文','FR':'外文'}"

name="favouriteLanguage"

emptyOption="true"

headerKey="None"

headerValue="None"/>

<s:checkboxlist

tooltip="Choose your Friends"

label="Friends"

list="{'Patrick', 'Jason', 'Jay', 'Toby', 'Rene'}"

name="friends"/>

<s:checkbox

tooltip="Confirmed that your are Over 18"

label="Age 18+"

name="legalAge"/>

<s:doubleselect

tooltip="Choose Your State"

label="State"

name="region" list="{'North', 'South'}"

value="'South'"

doubleValue="'Florida'"

doubleList="top == 'North' ? {'Oregon', 'Washington'} : {'Texas', 'Florida'}"

doubleName="state"

headerKey="-1"

headerValue="---------- Please Select ----------"

emptyOption="true" />

<s:file

tooltip="Upload Your Picture"

label="Picture"

name="picture" />

<s:optiontransferselect

tooltip="Select Your Favourite Cartoon Characters"

label="Favourite Cartoons Characters"

name="leftSideCartoonCharacters"

leftTitle="Left Title"

rightTitle="Right Title"

list="{'Popeye', 'He-Man', 'Spiderman'}"

multiple="true"

headerKey="headerKey"

headerValue="--- Please Select ---"

emptyOption="true"

doubleList="{'Superman', 'Mickey Mouse', 'Donald Duck'}"

doubleName="rightSideCartoonCharacters"

doubleHeaderKey="doubleHeaderKey"

doubleHeaderValue="--- Please Select ---"

doubleEmptyOption="true"

doubleMultiple="true" />

<s:textarea

label="Your Thougths"

name="thoughts"

tooltip="Enter your thoughts here" />

<s:submit οnclick="alert('aaaa');" />

<s:reset οnclick="alert('bbbb');" />

</s:form>

</body>

</html>

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