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persister 2009-06-16 17:21 鍙戣〃璇勮
]]>
JSTL鏍囩鐢ㄦ硶鎬葷粨http://m.tkk7.com/persister/archive/2007/07/31/133532.htmlpersisterpersisterTue, 31 Jul 2007 03:26:00 GMThttp://m.tkk7.com/persister/archive/2007/07/31/133532.htmlhttp://m.tkk7.com/persister/comments/133532.htmlhttp://m.tkk7.com/persister/archive/2007/07/31/133532.html#Feedback0http://m.tkk7.com/persister/comments/commentRss/133532.htmlhttp://m.tkk7.com/persister/services/trackbacks/133532.htmlJSP 鏍囧噯鏍囪搴擄紙 Standard Tag Library 錛?JSTL) 鏄竴緇勪互鏍囧噯鍖栨牸寮忓疄鐜拌澶氶氱敤鐨?Web 绔欑偣鍔熻兘鐨勫畾鍒舵爣璁般?/p>

JSP 鎶鏈殑浼樺娍涔嬩竴鍦ㄤ簬鍏跺畾鍒舵爣璁板簱宸ュ叿銆傞櫎浜嗘牳蹇?JSP 鏍囪錛屽 jsp:include 涔嬪錛屽畾鍒舵爣璁板簱宸ュ叿浣挎偍鑳藉鍒涘緩鍞竴鐨勬爣璁版潵鎻忚堪浠ョ珯鐐規垨搴旂敤紼嬪簭涓哄鍚戠殑鎿嶄綔銆備竴鏃︽偍鍒涘緩浜嗗畾鍒舵爣璁板簱 ( 綆縐?taglib) 錛屽綋鎮ㄦ墿灞曢」鐩垨杞悜鍙︿竴涓」鐩椂鎮ㄥ彲浠ラ噸澶嶄嬌鐢ㄨ繖浜涙爣璁般?/p>

JSTL 鐨勭洰鏍囨槸涓轟簡綆鍖?JSP 欏甸潰鐨勮璁°傚浜庨〉闈㈣璁′漢鍛樻潵璇達紝浣跨敤鑴氭湰璇█錛堥粯璁ゅ兼槸 JAVA 璇█錛夋搷浣滃姩鎬佹暟鎹槸姣旇緝鍥伴毦鐨勶紝鑰岄噰鐢ㄦ爣絳懼拰琛ㄨ揪寮忚璦鐩稿瀹規槗涓浜涳紝 JSTL 鐨勪嬌鐢ㄤ負欏甸潰璁捐浜哄憳鍜岀▼搴忓紑鍙戜漢鍛樼殑鍒嗗伐鍗忎綔鎻愪緵浜嗕究鍒┿?/p>

涓錛?strong> 閰嶇疆 JSTL

鍖呮嫭涓や釜 JAR 鏂囦歡錛?jstl.jar 鍜?standard.jar 銆傚師鏂囧紩鍏ワ細

<%@ taglib prefix="c" uri="

<%@ taglib prefix="sql" uri="

<%@ taglib prefix="fmt" uri="

浜岋紟 Core 鏍囩搴?/strong>

Core 鏍囩搴撲富瑕佸寘鎷簡涓鑸敤閫旂殑鏍囩銆佹潯浠舵爣絳俱佽凱浠f爣絳懼拰 URL 鐩稿叧鐨勬爣絳俱傚湪 JSP 欏甸潰浣跨敤 Core 鏍囩錛岃浣跨敤 taglig 鎸囦護錛屾寚瀹氬紩鐢ㄧ殑鏍囩搴擄紝濡備笅錛?/p>

<%@ taglib rui=”http://java.sun.com/jsp/jstl/core” prefix=”c” %>

涓鑸敤閫旂殑鏍囩鏈?<c:out> 銆?<c:set> 銆?<c:remove> 銆?<c:cath>

1.<c:out>

鐢ㄤ簬璁$畻涓涓〃杈懼紡騫跺皢緇撴灉杈撳嚭銆傜被浼間簬 JSP 涓?<%=%> 琛ㄨ揪寮忥紝鎴栬呮槸 EL 涓?$ ${el-expression} 銆?/p>

2.<c:set>

鐢ㄤ簬璁劇疆鑼冨洿鍙橀噺鐨勫兼垨鑰?javabean 瀵硅薄鐨勫睘鎬с?/p>

鐪嬩釜瀹為檯渚嬪瓙錛?/p>

<c:set var=”username” value=”lisi” scope=”session”/>

榪欐牱灝辯浉褰撲簬璁劇疆浜?session 銆?/p>

3.<c:remove>

鐩稿 <c:set> 鍏朵綔鐢ㄦ槸縐婚櫎鑼冨洿鍙橀噺銆傛瘮濡傦細 <c:remove var=”nusername” scope=”session”/>

4.<c:catch>

鐢ㄤ簬鎹曡幏鍦ㄥ叾涓祵濂楃殑鎿嶄綔鎵鎶涘嚭鐨勫紓甯稿璞★紝騫跺皢寮傚父淇℃伅淇濆瓨鍒板彉閲忎腑銆?/p>

鎴戜滑灝嗘湁鍙兘鎶涘嚭寮傚父鐨勪唬鐮佹斁緗埌寮濮嬫爣絳?:<c:catch> 鍜岀粨鏉熸爣絳?:</c:catch> 涔嬮棿銆傚鏋滃叾涓唬鐮佸嚭鐜板紓甯革紝寮傚父瀵硅薄灝嗚鎹曡幏錛屼繚瀛樺湪 var 澹版槑鐨勫彉閲忎腑錛岃鍙橀噺鎬繪槸鏈?page 鑼冨洿銆傚鏋滄病鏈夊彂鐢熷紓甯革紝鑰?var 鎵鏍囪瘑鐨勮寖鍥村彉閲忓皢琚Щ闄ゃ?/p>

濡傛灉娌℃湁鎸囧畾 var 灞炴э紝寮傚父鍙槸綆鍗曠殑琚崟鑾鳳紝寮傚父淇℃伅騫朵笉浼氳淇濆瓨銆?/p>

Eg 錛?/strong>

<c:catch var=”exception”>

<%

       int i = 5;

       int j = 0;

       int k=i/j;

%>

</c:catch>

<c:out value=”${exception}” /><br>

<c:out value=”${exception.massage}”/>

鍚庝竴鍙ョ浉褰撲簬錛?exception.getMessage()

鏉′歡鏍囩鍖呮嫭 <c:if><c:choose><c:when><c:otherwise>

1.<c:if>

鐢ㄤ簬瀹炵幇 java 涓殑 if 璇彞鍔熻兘銆?/p>

<c:if test=”${user.visitCount==1}”>

       This is your first visit .

</c:if>

鑻ヤ負 true 錛屼細鎵撳嵃涓棿閮ㄥ垎銆備篃鍙互澹版槑 var 錛屾柟渚夸笅涓姝ュ垽鏂?/p>

<c:if test=”${param.name==’admin’}” value=”result”/>

<c:out value=”${result}” />

2.<c:choose>

<c:choose> 鍜?<c:when> 銆?<c:otherwise> 涓璧峰疄鐜頒簰鏂ユ潯浠舵墽琛岋紝綾諱技浜?java 涓殑 if else.

<c:choose> 涓鑸綔涓?<c:when> 銆?<c:otherwise> 鐨勭埗鏍囩銆?/p>

eg 錛?/p>

<c:choose>

       <c:when test="${row.v_money<10000}">

              鍒濆涓嬫搗

       </c:when>

       <c:when test="${row.v_money>=10000&&row.v_money<20000}">

              韜墜灝忚瘯

       </c:when>

       <c:otherwise>

              鍟嗕笟鑳芥墜

       </c:otherwise>

</c:choose>

榪唬鏍囩

榪唬鏍囩鏈?font color="#ff0000"> <c:forEach> 鍜?</c:forEach>

// 閬嶅巻璁板綍闆?/p>

<c:forEach items="${finalResult.rows}" var="row">       

<tr class="<%=tdClass[(rank+1)%2]%>">

<td align="center"><span><%=rank%> </span></td>

<td align="center"><span ><c:out value="${row.player_name}"/></span> </td>

<td align="center"><span > 錕?<c:out value="${row.money}"/></span></td>

</tr>

<%rank++;%>     

</c:forEach>

涔熷彲浠ヨ瀹氬浐瀹氭鏁般?/p>

<c:forEach var =”i” begin=”100 “ end= “110”>

       ${i}

</c:forEach>

濡傛灉鍐嶅姞涓?step= “ 2 ”閭d箞姣忔澧為暱涓?2 銆?/p>

涓夛紟 sql 鏍囩

璁劇疆鏁版嵁婧愶細

<sql:setDataSource dataSource="proxool.breadTycoon" />

// 灝嗘暟鎹簱鏌愭煡璇㈢殑緇撴灉澹版槑涓轟竴涓彉閲?/p>

<sql:query var="finalResult" >

    select player_name,money from tb_player order by money DESC LIMIT 10   

</sql:query>

       鐒跺悗鍙互錛?/p>

<c:forEach items="${ finalResult.rows}" var="row" varStatus="s">

        advCosts[${s.index}]=${row.adv_cost};

   </c:forEach>

       鏁版嵁鏇存柊鏍囩錛?/p>

<sql:update>  

                call proc_set_role_salespro(?,?,?,?,?);

                <sql:param value="30"/>

                <sql:param value="39"/>

                <sql:param value="<%=spID%>"/>

                <sql:param value="<%=productID%>"/>

                <sql:param value="1"/>               

            </sql:update>

<sql:query var="queryAllChannelCount">

SELECT COUNT(*) as total FROM tb_channel WHERE game_id=? AND begin_round<func_cur_round(?) AND player_id=? AND channel_flag=0

<sql:param value="${gameID}"/>

<sql:param value="${gameID}"/>

<sql:param value="${playerID}"/>

</sql:query>

<c:forEach items="${queryAllChannelCount.rowsByIndex}" var="channelCN">

       <c:set value="${channelCN[0]}" var="channelTotal"/>

</c:forEach>

璋冪敤瀛樺偍榪囩▼鏇存柊鏁版嵁搴擄細

<c:if test="${param.changsubmit!=null}" >

<c:forEach items="${paramValues.pro_id}" var="getpro_id" varStatus="getparamsta">

<sql:update>

call proc_set_role_product(?,?,?,?,?,?,?,?);

<sql:param value="${gameID}"/>

<sql:param value="${playerID}"/>

<sql:param value="${getpro_id}"/>

<sql:param value="${getpro_id}"/>

<sql:param value="${paramValues.pro_sort[getparamsta.index]}"/>

<sql:param value="${paramValues.price[getparamsta.index]}"/>

<sql:param value="${paramValues.output[getparamsta.index]}"/>

<sql:param value="0"/>

</sql:update>

</c:forEach>

</c:if>

鍥涳紟 鏍煎紡鍖栨爣絳?/p>

<fmt: formatNumber value =”12.3” pattern=”.000”/>

灝嗚緭鍑?12.300. 搴旂敤鏍峰紡 ”.000”, 灝嗕嬌鏍煎紡鍖栧悗鐨勫皬鏁伴儴鍒嗘湁 3 浣嶃備笉瓚?3 浣嶅皢浠?0 琛ラ綈銆?

       <fmt:formatDate value=”<%=new java.util.Date() %>” type=”date” />

       鏍煎紡鍖栫殑緇撴灉鏄細 2007-5-27 .

<fmt:formatDate value=”<%=new java.util.Date() %>” type=”time” />

鏍煎紡鍖栫殑緇撴灉鏄細 9:25:11

<fmt:formatDate value=”<%=new java.util.Date() %>” type=”both” />

鏍煎紡鍖栫殑緇撴灉鏄細 2007-5-27 9:25:11

琛ュ厖鐭ヨ瘑鐐癸細

1. 鏇挎崲 request.getParameter("test"):

<c:if test="${param.test!=null}" >

<c:out value="${param.test}" />

</c:if>

2. <c:redirect url="a.jsp">

3.<c:redirect url="/max.jsp" context="/ch16">

<c:param name="name1" value="665"/>

<c:param name="name3" value=" 鏂拏鑺?"/>

</c:redirect>

4.<c:forTokens items="zhangsan:lisi:as" delims=":" var="name">

${name}

</c:forTokens>



persister 2007-07-31 11:26 鍙戣〃璇勮
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