JSTL

JSTL (JavaServer Pages Standard Tag Library) Борислава Спасова Мартин Чиллев

Съдържание ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

JSP потребителски тагове и библиотеки JSP Custom Tags and Tag Libraries

Какво e потребителски таг ? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Потребителски тагове ,[object Object],[object Object],[object Object],[object Object],[object Object],<myTags:calendar date="17/12/2006" />

Какво е библиотека с тагове? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Как да използваме библиотека с тагове? ,[object Object],[object Object],[object Object],[object Object],<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <c:out value="I am a custom tag" />

JSTL (JavaServer Pages Standard Tag Library) Стандартната библиотека с тагове в JSP стандарта

Какво е JSTL? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Защо JSTL? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

JSTL Core тагове ,[object Object],[object Object],<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"> <%-- Save data in scoped variables --%> <c:set var="name1" value="value1" scope="page" /> <c:set var="name2" value="value2" scope="request" /> <c:set var="name3" value="value3" scope="session" /> <c:set var="name4" value="value4" scope="application" />

Core тагове ,[object Object],[object Object],[object Object],<c:out value='${pageScope.someBean}' /> <c:out value='${user.login}' /> <c:out value='${user.name}' /> <c:out value='${user.title}' escape Xml ='false' /> <c:remove var="name" scope="page" /> <c:catch var="myException"> Inside the catch… <% int x = 10/0; %> </c:catch>

Core тагове ,[object Object],[object Object],[object Object],<c:if test='${param.p == "someValue"}'> The property p of param is equal to "someValue" </c:if> <c:choose> <c:when test='${param.p == "someValue"}'> Generate this if p equals someValue </c:when> <c:otherwise> Otherwise generate this template </c:otherwise> </c:choose>

Core тагове ,[object Object],[object Object],[object Object],<c:forEach var='item' begin='1' end='10'> <c:out value='${item}'/> </c:forEach> <ul> <c:forEach var='item' items='${itemsList}'> <li><c:out value='${item}'/></li> </c:forEach> </ul>

Core тагове ,[object Object],[object Object],<c:forEach var='item' items='${map}'> <c:out value='Key=${item.key} /> <c:out value='Key=${item.value} /> </c:forEach>

Core тагове ,[object Object],[object Object],[object Object],<c:url value="http://www.somewhere.com/ customers/register" var="registrationURL"> <c:param name="name" value="${param.name}"/> <c:param name="country" value="${param.country}"/> </c:url> <a href='<c:out value="${registrationURL}“/>'> Customer Registration>/a> <c:redirect url="http://www.somewhere.com/register">

JSTL Formatting and Internationalization Tags

Internationalization тагове ,[object Object],[object Object],[object Object],<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix= " fmt " > <fmt:setLocale value="bg" /> <fmt:requestEncoding value="UTF-8"/>

Internationalization тагове ,[object Object],[object Object],<fmt:setBundle basename="Messages" var= " messagesBundle " /> <fmt:bundle basename="Messages"> <%-- Контекст повлиян от локализацията --%> <fmt:message key="EnterUserNameMsg" /> </fmt:bundle>

Internationalization тагове ,[object Object],[object Object],<fmt:message key="messageKey" bundle="resourceBundle" /> <fmt:message key= " messageKey " bundle= " resourceBundle " > <fmt:param value= " messageValue " /> </fmt:message>

Internationalization тагове ,[object Object],[object Object],<fmt:formatNumber value= " ${someNumber} " pattern= " ###,###.## " /> <fmt:formatDate value= " ${someDate} " pattern= " hh:mm:ss MM/dd/yy " /> <fmt:formatNumber value= " ${someMoney} " type= " currency|percent|number " />

Internationalization тагове ,[object Object],[object Object],<c:catch var="parsingError" <fmt:parseNumber value="${numberToParse}" type="number" var="parsedNumber"/> </c:catch> <fmt:parseDate value= " 2/5/53 " pattern= " dd/MM/yy " var= " johnBirthdate " />

Internationalization тагове ,[object Object],<fmt:timeZone value= " US/Eastern " > <fmt:parseDate value= " 2/5/53 " pattern= " dd/MM/yy " var= " johnBirthday " /> <fmt:formatDate value= " ${johnBirthday} " dateStyle= " short " /> <%-- ще изкара 5/2/53 --%> </fmt:timeZone>

JSTL XML тагове ,[object Object],[object Object],[object Object],<%@ taglib uri="http://java.sun.com/jstl/xml" prefix="x" %> <x:out select="$catalog/book/title"/> <x:parse var="catalog" xml="${catalogXml}" />

JSTL XML тагове ,[object Object],<x:forEach var="item" select="$catalog/items"> <tr> <td><x:out select="author/name/first" /></td> <td><x:out select="author/name/last" /></td> <td><x:out select="title" /></td> <td><x:out select="price" /></td> </tr> </x:forEach>

SQL тагове ,[object Object],<sql:setDataSource var="example" driver=“org.hsqldb.jdbcDriver" url="jdbc:hsqldb:file:testdb" user=“sa" password=“sa" />

SQL тагове ,[object Object],<sql:query var= " resultSet" dataSource= " ${example}" sql= " SELECT BAND, TITLE FROM SONG WHERE ID=? " > <param value= " 1 " > … </sql:query>

SQL тагове ,[object Object],<sql:update var= " resultSet" dataSource= " ${example}" sql="INSERT INTO SONG (BAND, TITLE) VALUES(?, ?)"> <param value= " AC/DC " /> <param value= " T.N.T " /> </sql:update>

JSTL

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