HTTP淇℃伅
闅愯棌瀛楁錛?/span><input type=”hidden” name=”somename” value=”somevalue”>
URL閲嶅啓錛?/span><a href=”XX.jsp?name=XX&item=XX”>鍐嶉氳繃getParameter(XX)寰楀埌
Cooike
Session錛?/span>session.setAtrribute(xx,xx)
浜屻?/span>servlet鐨勭敓鍛藉懆鏈?/span>
瑁呰澆銆佸疄渚嬪寲銆佸垵濮嬪寲init()銆佸疄渚嬬殑璇鋒眰doXXX()銆侀攢姣?/span>distoryI()
涓夈?/span>servlet鐩稿叧閰嶇疆
Javax.servlet.ServletConfig鎺ュ彛浠ｈ〃浜?/span>Servlet鐨勯厤緗紝鍖呮嫭servlet鐨勫悕瀛椼佸垵濮嬪寲鍙傛暟銆佷笂涓嬫枃
鍦?/span>web.xml涓殑<servlet></servlet>涔嬮棿鐨勫唴瀹瑰氨鏄?/span>servlet鐨勯厤緗?/span>
<init-param>
<param-name>MM</param-name>
<param-value>NN</param-value>
</init-param>
鍦?/span>servlet涓洿鎺ヤ嬌鐢?/span>getInitParameter(“MM”)灝卞彲浠ュ緱鍒?/span>NN
Servlet鐨勬槧灝勯厤緗?/span>
<servlet-mapping>
<servlet-name>Conter</servlet-name>
<url-pattern>/count/*</url-pattern>
</servlet-mapping>
榪欑鎯呭喌涓嬪綋鍦板潃鏍忛噷杈撳叆http://127.0.0.1:8080/count/gaex涓嶇鏈鍚庢槸浠涔堥兘鑳借煩鍒?/span>servlet涓?/span>
鍥涖佺洃鍚?/span>
鐩戝惉鏄servletContext鐨勫睘鎬у垱寤恒佸垹闄ょ殑鐩戝惉
瀵圭洃鍚殑閰嶇疆鍦?/span>web.xml涓紝蹇呴』鍦ㄦ墍鏈夌殑servlet鍏冪礌涔嬪墠
浜斻?/span>web榪囨護(hù)鍣?/span>
瀹㈡埛绔?/span> HTTP璇鋒眰àFilter à doFilter àFilter à鐩爣緇勪歡
瑕佸紑鍙戜竴涓?/span>Filter蹇呴』鐩存帴鎴栭棿鎺ョ殑瀹炵幇Filter鎺ュ彛
Filter鎺ュ彛涓殑鏂規(guī)硶鏈夛細(xì)
init()鑾峰緱FilterConfig瀵硅薄
destroy()閿姣佽繖涓繃婊ゅ櫒
doFilter()榪涜榪囨護(hù)澶勭悊
濡傛灉鏈夊涓繃婊ゅ櫒鍦?/span>doFilter()涓氨瑕佸姞涓?/span>chain.doFilter(srequest,sresponse)鎶婂鐞嗘潈鍙戠粰涓嬩釜澶勭悊鍣紝濡傛灉娌℃湁涓嬩竴涓繃婊ゅ櫒灝辨妸璇鋒眰鍙戦佺粰鐩爣
鍦?/span>web.xml涓瀵?/span>Filter榪涜閰嶇疆
<filter>
<filter-name>xx</filter-name>
<filter-class>xxxxxxx</filter>
<init-param>
<param-name></param-name>
<param-value></param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>xx</filter-name>
<url-pattern>/fds/*</url-pattern>
</filter-mapping>
娉ㄦ剰錛氫竴涓?/span>Filter鍙互鏈夊涓?/span>Filter-mapping錛屽氨鏄澶氫釜web緇勪歡榪囨護(hù)錛涗竴涓粍浠朵篃鍙互鏈夊涓?/span>Filter
鍏?/span>JSP閿欒欏甸潰鐨勫０鏄?/span>
緙栫▼涓寚瀹氶敊璇〉闈細(xì)
榪欎袱鐐規(guī)槸蹇呴』鐨勶細(xì)
鍦ㄥ鎬曞嚭閿欑殑JSP欏甸潰涓婃寚瀹?/span><%@page errorPage=”error.jsp”%>
鍦ㄦ寚瀹氱殑澶勭悊閿欒鐨勯〉闈笂<%@page ... isErrorPage=”true”%>
瀵逛簬搴旂敤鏈嶅姟鍣ㄦ姏鍑虹殑寮傚父錛氾紙web.xml錛?/span>
<error-page>
<error-code>404</error-code>
<location>/Error.html</location>
</error-page>
涓冦?/span>JSTL
1錛?/span><c:out
value=”” > default </c:out>
Value鏄杈撳嚭鐨勫唴瀹癸紝default褰?/span>value涓?/span>null鏃訛紝杈撳嚭鐨勫唴瀹?/span>
2錛?/span><c:if
test=”” [var=”varName”]> body </c:if>
Test鏄竷?yōu)當(dāng)鍨嬭〃杈惧?/span>
3錛?/span><c:choose> <when> and
<otherwise> </c:choose>
4) <c:forEach var=”” items=”” begin=”” end=””
step=””> ……</c:forEach>
var榪唬鍙傛暟鐨勫悕瀛楋紝items瑕佽凱浠ｇ殑闆嗗悎
鍏佸叧浜?/span>EL琛ㄨ揪寮?/span>
褰撻亣鍒?/span>EL琛ㄨ揪寮忓悗錛屽鍣ㄥ皢鍦?/span>page銆?/span>request銆?/span>session銆?/span>application涓幓鏌ヨ榪欎釜瀵硅薄
]]>