<? xmlversion="1.0"encoding="ISO-8859-1" ?>
<! DOCTYPEweb-appPUBLIC"-//SunMicrosystems,Inc.//DTDWebApplication2.3//EN""http://java.sun.com/j2ee/dtds/web-app_2_3.dtd" >
< web-app xmlns ="http://java.sun.com/xml/ns/j2ee" xmlns:xsi ="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation ="http://java.sun.com/xml/ns/j2eeweb-app_2_4.xsd" version ="2.4" >
< display-name > TestWebapp </ display-name > <!-- 站點(diǎn)名稱 -->
< description > <!-- 站點(diǎn)描述 -->
Thisisasampledeploymentdescriptorthatshowstheuseofimportantelements.
</ description >

< icon >
< small-icon > /images/small.gif </ small-icon > <!-- 小圖標(biāo)的路徑16*16,必須為gifjpg格式 -->
< large-icon > /images/large.gif </ large-icon > <!-- 大圖標(biāo)的路徑32*32,必須為gifjpg格式 -->
</ icon >
<!-- 該標(biāo)志表示應(yīng)用程序能夠在多系統(tǒng)之間運(yùn)行，在有多個(gè)servlet下才需要！ -->
< distributable />
<!-- 通常context-param指定數(shù)據(jù)庫(kù)驅(qū)動(dòng)、協(xié)議設(shè)置和URL路徑信息。是application級(jí)的變量.只能跟在web-app之后。
取得常量this.getInitParameter("context"); -->
< context-param >
< param-name > locale </ param-name >
< param-value > US </ param-value >
</ context-param >

< context-param >
< param-name > DBName </ param-name >
< param-value > Oracle </ param-value >
</ context-param >
<!-- filter和filter-mapping標(biāo)志必須在任何servlet標(biāo)志之前定義。listener也是 -->
< filter >
< filter-name > TestFilter </ filter-name >
< description > Justfortest </ description >
< filter-class > filters.TestFilter </ filter-class >
< init-param >
< param-name > locale </ param-name >
< param-value > US </ param-value >
</ init-param >
</ filter >

< filter-mapping >
< filter-name > TestFilter </ filter-name >
< url-pattern > /*.jsp </ url-pattern > <!-- 如果在servlet上使用該過(guò)濾器：<servlet-name>myServlet</servlet-name> -->
< dispatcher > FORWARD </ dispatcher > <!-- 指定請(qǐng)求轉(zhuǎn)送方式，可設(shè)定為request,include,forward,error四種 -->
</ filter-mapping >
<!-- Definesapplicationeventslisteners -->
< listener >
< listener-class > listeners.MyServletContextListener </ listener-class >
</ listener >

< listener >
< listener-class > listeners.MySessionCumContextListener </ listener-class >
</ listener >
<!-- Definesservlets -->
< servlet >
< servlet-name > TestServlet </ servlet-name >
< description > Justfortest </ description >
< servlet-class > servlets.TestServlet </ servlet-class >
<!-- 因?yàn)镴SP頁(yè)面要轉(zhuǎn)換成sevlet，自然希望就像命名servlet一樣命名JSP頁(yè)面。為了命名JSP頁(yè)面，可將servlet-class元素替換為jsp-file元素 -->
</ servlet >

< servlet >
< servlet-name > HelloServlet </ servlet-name >
< servlet-class > servlets.HelloServlet </ servlet-class >
< init-param > <!-- 該標(biāo)志定義外層servlet可以訪問(wèn)的變量的名稱、值和描述 -->
< param-name > locale </ param-name >
< param-value > US </ param-value >
</ init-param >
< load-on-startup > 1 </ load-on-startup > <!-- 在servlet的配置當(dāng)中，該標(biāo)記指示容器是否在啟動(dòng)的時(shí)候就加載這個(gè)servlet，當(dāng)值為0或者大于0時(shí)，表示容器在應(yīng)用啟動(dòng)時(shí)就加載這個(gè)servlet當(dāng)是一個(gè)負(fù)數(shù)時(shí)或者沒(méi)有指定時(shí)，則指示容器在該servlet被選擇時(shí)才加載，正數(shù)的值越小，啟動(dòng)該servlet的優(yōu)先級(jí)越高。 -->
< security-role-ref > <!-- 元素提供出現(xiàn)在服務(wù)器專用口令文件中的安全角色名的一個(gè)別名 -->
<!-- role-nameisusedinHttpServletRequest.isUserInRole(Stringrole)method. -->
< role-name > manager </ role-name >
<!-- role-linkisoneoftherole-namesspecifiedinsecurity-roleelements. -->
< role-link > supervisor </ role-link >
< security-role-ref >
</ servlet >
<!-- Definesservletmappings -->
< servlet-mapping >
< servlet-name > TestServlet </ servlet-name >
< url-pattern > /test/* </ url-pattern > <!-- uil-pattern標(biāo)志確定上下文之后的標(biāo)志 -->
</ servlet-mapping >

< servlet-mapping >
< servlet-name > HelloServlet </ servlet-name >
< url-pattern > *.hello </ url-pattern >
</ servlet-mapping >

< session-config >
<!-- specifiessessiontimeoutas30minutes. -->
< session-timeout > 30 </ session-timeout >
</ session-config >

< mime-mapping >
< extension > jar </ extension >
< mime-type > application/java-archive </ mime-type >
</ mime-mapping >

< mime-mapping > <!-- 這個(gè)例子展示了自動(dòng)將application/pdfMIME類型與所有擴(kuò)展名為*.pdf的文件關(guān)聯(lián)起來(lái) -->
< extension > pdf </ extension >
< mime-type > application/pdf </ mime-type >
</ mime-mapping >

< welcome-file-list >
< welcome-file > index.html </ welcome-file >
< welcome-file > home.html </ welcome-file >
< welcome-file > welcome.html </ welcome-file >
</ welcome-file-list >

< error-page >
< error-code > 404 </ error-code >
< location > notfoundpage.jsp </ location >
</ error-page >

< error-page >
< exception-type > java.sql.SQLException </ exception-type >
< location > sqlexception.jsp </ location >
</ error-page >

< taglib >
< taglib-uri > /examplelib </ taglib-uri >
< taglib-location > /WEB-INF/tlds/examplelib.tld </ taglib-location >
</ taglib >

< taglib >
< taglib-uri > http://abc.com/testlib </ taglib-uri >
< taglib-location > /WEB-INF/tlds/testlib.jar </ taglib-location > <!-- 可以是jar包 -->
</ taglib >

< taglib id ="ABC_MATH_LIB" > <!-- 可以有并只能有一個(gè)id作為屬性 -->
< taglib-uri > /binomial </ taglib-uri >
< taglib-location > /WEB-INF/MathLib.tld </ taglib-location >
</ taglib >

< security-constraint >
< display-name > ExampleSecurityConstraint </ display-name >
< web-resource-collection >
< web-resource-name > ProtectedArea </ web-resource-name >
< url-pattern > /test/* </ url-pattern >
<!-- Whenthereisno<http-method>elementin<security-constraint>,allmethodsareprotected. -->
< http-method > POST </ http-method >
</ web-resource-collection >
< web-resource-collection >
< web-resource-name > AnotherProtectedArea </ web-resource-name >
< url-pattern > *.hello </ url-pattern >
<!-- Allmethodsareprotectedasnohttp-methodisspecified -->
</ web-resource-collection >
< auth-constraint >
<!-- 設(shè)定允許存取的角色名稱，必須符合<security-role>元素設(shè)定 -->
< role-name > supervisor </ role-name >
</ auth-constraint >
<!-- 這個(gè)可選的元素指出在訪問(wèn)相關(guān)資源時(shí)使用任何傳輸層保護(hù) -->
< user-data-constraint >
<!-- transport-guarantee為NONE值將對(duì)所用的通訊協(xié)議不加限制。INTEGRAL值表示數(shù)據(jù)必須以一種防止截取它的人閱讀它的方式傳送。雖然原理上INTEGRAL和CONFIDENTIAL之間可能會(huì)有差別，但在當(dāng)前實(shí)踐中，他們都只是簡(jiǎn)單地要求用SSL -->
< transport-guarantee > INTEGRAL </ transport-guarantee >
</ user-data-constraint >
</ security-constraint >

< login-config >
<!-- auth-methodcanbe:BASIC,FORM,DIGEST,orCLIENT-CERT -->
< auth-method > FORM </ auth-method >
< realm-name > sales </ realm-name > <!-- 該標(biāo)志是驗(yàn)證用來(lái)確定某個(gè)特定的站點(diǎn)區(qū)域 -->
< form-login-config >
< form-login-page > /formlogin.html </ form-login-page >
< form-error-page > /formerror.jsp </ form-error-page >
</ form-login-config >
</ login-config >
<!-- Specifiestherolesthataredefinedintheapplicationserver.Forexample,Tomcatdefinesitinconf omcat-users.xml -->
< security-role >
< role-name > supervisor </ role-name >
</ security-role >

< security-role >
< role-name > worker </ role-name >
</ security-role >

<!-- *****************************以下是J2EE元素的內(nèi)容***************************** -->

< resource-env-ref > <!-- 聲明一個(gè)與某個(gè)資源有關(guān)的管理對(duì)象 -->
< resource-env-ref-name > jms/StockQueue </ resource-env-ref-name > <!-- 一個(gè)相對(duì)于java:comp/env環(huán)境的JNDI名 -->
< resource-env-ref-type > javax.jms.Queue </ resource-env-ref-type > <!-- 指定資源類型的完全限定的類 -->
</ resource-env-ref >

< env-entry > <!-- 聲明Web應(yīng)用的環(huán)境項(xiàng) -->
< env-entry-name > minAmout </ env-entry-name > <!-- 一個(gè)相對(duì)于java:comp/env環(huán)境JNDI名 -->
< env-entry-value > 100.00 </ env-entry-value > <!-- 項(xiàng)值 -->
< env-entry-type > minAmout </ env-entry-type > <!-- java.lang程序包中一個(gè)類型的完全限定類名，Boolean、String等 -->
</ env-entry >

<!-- *****************************以下是JSP2.0新增加的內(nèi)容***************************** -->

<!-- Servle