Servlet\u4e09\u4e2a\u8981\u7d20:
\n1.\u5fc5\u987b\u7ee7\u627f\u81eaHttpServlet
\n2.\u5fc5\u987b\u5b9e\u73b0doGet()\u6216\u8005doPost()
\n3.\u5fc5\u987b\u5728web.xml\u4e2d\u914d\u7f6eServlet
\n<servlet>
\n<servlet-name> <\/servlet-name>
\n<servlet-class> <\/servlet-class>
\n<\/servlet>
\n<servlet-mapping>
\n<servlet-name> <\/servlet-name>
\n<url-pattern> <\/url-pattern>
\n<\/servelt-mapping><\/p>\n
HttpServeltRrequest:\u8bf7\u6c42\u5bf9\u8c61
\ngetParameter():\u83b7\u5f97\u8868\u5355\u5143\u7d20\u7684\u503c
\ngetAttribute():\u83b7\u5f97request\u8303\u56f4\u4e2d\u7684\u5c5e\u6027\u503c
\nsetAttribute():\u8bbe\u7f6ereqeust\u8303\u56f4\u4e2d\u7684\u5c5e\u6027\u503c
\nsetCharacterEncoding():\u8bbe\u7f6e\u5b57\u7b26\u7f16\u7801<\/p>\n
HttpSerletResponse:\u76f8\u5e94\u5bf9\u8c61
\nsendRedirect():\u5916\u90e8\u8df3\u8f6c
\ngetWriter():\u83b7\u5f97\u8f93\u51fa\u6d41\u5bf9\u8c61
\nsetContentType(“text\/html; charset=utf-8”):\u8bbe\u7f6e\u76f8\u5e94\u5185\u5bb9\u683c\u5f0f\u548c\u7f16\u7801<\/p>\n
\u56db\u79cd\u4f1a\u8bdd\u8ddf\u8e2a\u65b9\u5f0f:
\n1.Session
\nHttpSession session = request.getSession();
\nsession.setAttribute(“name”, “zhangsan”);
\nsession.setAttribute(“pwd”, “aaa”);
\nString name = (String) session.getAttribute(“name”);<\/p>\n
2.cookie:
\n\/\/\u521b\u5efaCookie
\nCookie cookie = new Cookie(“name”, “zhangsan”);
\n\/\/\u8bbe\u7f6eCookie\u7684\u8d85\u65f6\u65f6\u95f4
\ncookie.setMaxAge(24 * 60 * 60 *60);
\n\/\/\u628aCookie\u53d1\u9001\u5230\u5ba2\u6237\u7aef
\nresponse.addCookie(cookie);<\/p>\n
\/\/\u5f97\u5230\u5ba2\u6237\u7aef\u53d1\u9001\u7684Cookie
\nCookie [] cookies = request.getCookies();
\nfor(int i=0; i <cookies.length; i++) {
\nCookie temp = cookies[i];
\nString key = temp.getName();
\nString value = temp.getValue();
\n}<\/p>\n
3.\u9690\u85cf\u8868\u5355\u57df
\n<input type=”hidden” name=”name” value=”zhangsan” \/>
\nrequest.getParameter(“name”);<\/p>\n
4.Url\u91cd\u5199
\n\u95ee\u53f7\u4f20\u53c2
\nLoginServlet?username=zhangsan&pwd=123
\nString name = request.getParameter(“username”);
\nString pwd =request.getPareameter(“pwd”);<\/p>\n
\u5185\u90e8\u8df3\u8f6c:
\nLoginServlet
\nrequest.getRequestDispatcher(“index.jsp”).forward(request, resposne);
\n\u5916\u90e8\u8df3\u8f6c:
\nresponse.sendRedirect(“index.jsp”);
\n\u5185\u90e8\u8df3\u8f6c\u662f\u4e00\u6b21\u8bf7\u6c42\u548c\u4e00\u6b21\u54cd\u5e94
\n\u5916\u90e8\u8df3\u8f6c\u662f\u4e24\u6b21\u8bf7\u6c42\u548c\u4e24\u6b21\u54cd\u5e94<\/p>\n
ServletContext:Servlet\u4e0a\u4e0b\u6587\u5bf9\u8c61
\n\u5b83\u662f\u4e00\u4e2a\u516c\u5171\u533a\u57df,\u53ef\u4ee5\u88ab\u6240\u6709\u7684\u5ba2\u6237\u7aef\u5171\u4eab
\nsetAttribute():\u5411\u516c\u5171\u533a\u57df\u91cc\u653e\u5165\u6570\u636e
\ngetAttribute():\u4ece\u516c\u5171\u533a\u57df\u91cc\u53d6\u6570\u636e<\/p>\n
\u4e8c:
\n\u4e09:\u4e09\u4e2a\u6807\u51c6\u8303\u56f4:request, session, ServletContext
\n\u5171\u540c\u70b9:\u90fd\u6709setAttribute(), getAttribute()
\n\u533a\u522b:\u8303\u56f4\u4e0d\u540c,request < session < servletContext
\n\u56db:\u56db\u79cd\u4f1a\u8bdd\u8ddf\u8e2a\u65b9\u5f0f
\n\u4e94:\u670d\u52a1\u5668\u4e0a\u7684\u4e94\u5927\u5bf9\u8c61
\nrequest, response, servlet, session, servletContext<\/p>\n
Jsp:Java Server Page
\n\u9875\u9762\u6784\u6210:7\u79cd\u5143\u7d20
\n1.\u9759\u6001\u5185\u5bb9:html
\n2.\u6307\u4ee4:page, include, taglib:
\n<%@ \u6307\u4ee4\u540d \u5c5e\u60271=”\u5c5e\u6027\u503c1″ \u5c5e\u60272=”\u5c5e\u6027\u503c2″ %>
\n3.\u8868\u8fbe\u5f0f: <%=\u8868\u8fbe\u5f0f %>
\n4.Scriptlet <% Java\u4ee3\u7801 %>
\n5.\u58f0\u660e: <%! %>:\u53d8\u91cf\u548c\u65b9\u6cd5
\n6.\u52a8\u4f5c: <jsp:\u52a8\u4f5c\u540d \u5c5e\u6027=”\u5c5e\u6027\u503c”> <\/jsp:\u52a8\u4f5c\u540d>
\n7.\u6ce8\u91ca:
\n\u5ba2\u6237\u7aef\u770b\u4e0d\u5230\u7684: <%– –%>
\n\u5ba2\u6237\u7aef\u53ef\u4ee5\u770b\u5230\u7684: <!– –>
\nJsp\u7684\u6267\u884c\u8fc7\u7a0b:
\n1.\u8f6c\u8bd1:Jsp—>Servlet
\n2.\u7f16\u8bd1:Servlet—->.class
\n3.\u6267\u884c:.class
\n\u7b2c\u4e00\u6b21\u8bbf\u95eejsp\u7684\u65f6\u5019\u54cd\u5e94\u901f\u5ea6\u8f83\u6162,\u540e\u9762\u8bf7\u6c42\u65f6\u54cd\u5e94\u901f\u5ea6\u5feb<\/p>\n
\u811a\u672c:
\n\u8868\u8fbe\u5f0f: <%= %>
\nScriptlet: <% %>
\n\u58f0\u660e: <%! %><\/p>\n
\u6307\u4ee4:
\npage:language, import, errorPage, isErrorpage
\ninclude:file
\ntaglib:uri:\u6307\u5b9a\u6807\u7b7e\u5e93\u63cf\u8ff0\u7b26\u7684\u8def\u5f84 prefix:\u6307\u5b9a\u6807\u7b7e\u7684\u524d\u7f00<\/p>\n
\u9690\u5f0f\u5bf9\u8c61:
\n\u5206\u7c7b:
\n1.\u8f93\u5165\u548c\u8f93\u51fa\u5bf9\u8c61:request(HttpServletRequest),
\n??????? response(HttpServletResponse),
\n??????? out(JspWriter), servlet\u4e2d\u7684out\u662fPrintWriter
\n2.\u4f5c\u7528\u57df\u901a\u4fe1\u5bf9\u8c61:pageContext, request,
\n??????? session(HttpSession),
\n??????? application(ServletContext)
\n3.Servlet\u5bf9\u8c61:page(this), config
\n4.\u9519\u8bef\u5bf9\u8c61:exception<\/p>\n
JavaBean:
\n\u4e00\u4e2a\u6807\u51c6\u7684JavaBean\u6709\u4e09\u4e2a\u6761\u4ef6
\n1.\u5171\u6709\u7684\u7c7b
\n2.\u5177\u6709\u4e0d\u5e26\u53c2\u6570\u7684\u516c\u5171\u7684\u6784\u9020\u65b9\u6cd5
\n3.\u5177\u6709set()\u548cget()\u65b9\u6cd5
\n4.\u79c1\u6709\u5c5e\u6027<\/p>\n
Jsp\u4e2d\u7684\u6807\u51c6\u52a8\u4f5c:
\n1.useBean:\u521b\u5efaJavaBean\u7684\u4e00\u4e2a\u5b9e\u4f8b
\n<jsp:useBean id=”stu” scope=”page\/session\/application\/request” \/>
\n2.setProperty:\u7ed9JavaBean\u7684\u5c5e\u6027\u8d4b\u503c
\n<jsp:setProperty name=”stu” property=”stuName” value=”zhangsan” \/>
\n<jsp:setProperty name=”stu” property=”stuName” param=”txtName” \/>
\nvalue\u548cparam\u4e0d\u80fd\u540c\u65f6\u4f7f\u7528
\n\u5077\u61d2\u7684\u65b9\u6cd5: <jsp:setProperty name=”stu” property=”*” \/>
\n\u8fd9\u4e2a\u65f6\u5019\u9700\u8981\u6ce8\u610f\u7684\u662f,\u8868\u5355\u5143\u7d20\u7684\u540d\u5b57\u5fc5\u987b\u548cJavaBean\u7684\u5c5e\u6027\u503c
\n\u4e00\u6a21\u4e00\u6837
\n3.getProperty:\u83b7\u5f97JvaBean\u7684\u5c5e\u6027\u503c
\n<jsp:getProperty name=”stu” property=”stuName” \/>
\n4.forward:\u5185\u90e8\u8df3\u8f6c,\u76f8\u5f53\u4e8erequest.getRequestDispatcher().forward(request, response);
\n<jsp:forward page=”index.jsp” \/>
\n5.include:\u5305\u542b
\n<jsp:include page=”header.jsp” flush=”true” \/><\/p>\n
\u8868\u8fbe\u5f0f\u8bed\u8a00:
\nEL: Expression Language
\n\u8bed\u6cd5\u683c\u5f0f: ${\u8868\u8fbe\u5f0f }
\n\u8868\u793a\u5f0f = \u8fd0\u7b97\u7b26 + \u64cd\u4f5c\u6570
\n\u8fd0\u7b97\u7b26:\u8ddfJava\u6bd4\u8f83,\u591a\u4e86\u4e00\u4e2aempty, \u5c11\u4e86\u4e00\u4e2a\u8d4b\u503c\u8fd0\u7b97\u7b26
\n${empty “”} : true
\n${empty null} :true
\n\u64cd\u4f5c\u6570:
\n–>\u5e38\u91cf:\u5e03\u5c14\u578b(true\/false), \u6574\u578b, \u6d6e\u70b9\u578b, \u5b57\u7b26\u4e32(\u53ef\u4ee5\u7528”, \u8fd8\u53ef\u4ee5\u7528””), Null
\n–>\u53d8\u91cf:
\n1.\u6307\u7684\u662f\u653e\u5728\u56db\u4e2a\u6807\u51c6\u8303\u56f4\u91cc\u7684\u5c5e\u6027(page, request, session, application)
\n2.\u5728\u7f16\u51c6\u8303\u56f4\u5185\u7684\u641c\u7d22\u987a\u5e8f:page–>request—>session—>application
\n3.\u600e\u4e48\u53d6\u5f97\u53d8\u91cf\u503c:\u70b9\u8fd0\u7b97\u7b26., \u8fd8\u4ee5\u7528[]
\n<%
\nrequest.setAttribute(“name”, “lisi”);
\n%>
\n${requestScope.name}
\n\u6216\u8005
\n${requestScope[“name”]}
\n–>\u9690\u5f0f\u5bf9\u8c61
\n1.pageContext:\u901a\u8fc7\u5b83\u53ef\u4ee5\u8bbf\u95eerequest, session, servletContext
\n2.\u8ddf\u8303\u56f4\u7531\u5173\u7684:pageScope, requestScope, sessionScope, applicationScope
\n3.\u8ddf\u8f93\u5165\u6709\u5173\u7684:param, paramValues
\n4.\u5176\u4ed6\u7684:header, cookie, headervalues,<\/p>\n
EL\u8868\u8fbe\u5f0f\u9002\u7528\u7684\u573a\u5408:
\n1.\u53ef\u4ee5\u5728\u9759\u6001\u6587\u672c\u4e2d\u4f7f\u7528
\n2.\u4e0e\u81ea\u5b9a\u4e49\u6807\u7b7e\u7ed3\u5408\u4f7f\u7528
\n3.\u548cJavaBean\u7ed3\u5408\u4f7f\u7528
\n<jsp:userBean id=”stu” scope=”session” \/>
\n<jsp:setProperty name=”stu” property=”stuName” value=”hello” \/>
\n${stu.stuName}<\/p>\n
\u81ea\u5b9a\u4e49\u6807\u7b7e:
\n1.\u6807\u7b7e\u5904\u7406\u7a0b\u5e8f\u5b9e\u73b0
\n—>\u5b9e\u73b0:\u7ee7\u627f\u81eaBodyTagSupport\u6216\u8005TagSupport
\n? \u4e00\u822c\u4f1a\u91cd\u5199doStartTag(), doEndTag(), doAfterBody()
\n—>\u63cf\u8ff0:\u5728\u6807\u7b7e\u5e93\u63cf\u8ff0\u7b26\u6587\u4ef6\u4e2d\u63cf\u8ff0(.tld)
\n<taglib>
\n<tlib-version>1.0 <\/tlib-version>
\n<jsp-version>2.0 <\/jsp-version>
\n<short-name>simpletag <\/short-name><\/p>\n
<tag>
\n<name>showbody <\/name>
\n<tag-class>com.westaccp.test.ShowBodyTag <\/tag-class>
\n<body-content>empty\/jsp <\/body-content>
\n<attribute>
\n<name>color <\/name>
\n<\/attribute>
\n<\/tag>
\n<\/taglib>
\n—>\u4f7f\u7528: <%@ taglib uri=”WEB-INF\/mytag.tld” prefix=”my” %>
\n? <my:showbody \/>
\n2.\u6807\u7b7e\u6587\u4ef6
\n—>\u5b9e\u73b0\u548c\u63cf\u8ff0
\n\u5728.tag\u6587\u4ef6\u4e2d\u5b9e\u73b0
\n\u8bbe\u7f6e\u4e3b\u4f53\u5185\u5bb9: <%@ body-content=”empty\/scriptless” %>
\n\u8bbe\u7f6e\u5c5e\u6027: <%@ attribute name=”name” required=”true” rtexprvalue=”true” %>
\n\u6709\u4e3b\u4f53\u5185\u5bb9: <jsp:doBody scope=”session” var=”theBody” \/>
\n<%
\nString body = (String) session.getAttribute(“theBody”);
\n%>
\n—>\u4f7f\u7528
\nWEB-INF\/tags\/sayhello.tag
\n<%@ taglib tagdir=”\/WEB-INF\/tags\/” prefix=”you” %>
\n<you:sayhello \/><\/p>\n
\u6807\u51c6\u6807\u7b7e\u5e93:
\n1.\u6838\u5fc3\u6807\u7b7e\u5e93
\n–>\u901a\u7528:
\nset: <c:set var=”” value=”” scope=”” \/>
\nout: <c:out value=”” \/>
\nremove: <c:remove var=”” scope=”” \/>
\n–>\u6761\u4ef6:
\nif: <c:if test=””>….. <\/c:if>
\nchoose: <c:choose>
\n??? <c:when test=””>… <\/c:when>
\n??? <c:when test=””>… <\/c:when>
\n??? <c:when test=””>… <\/c:when>
\n??????? …..
\n??????? <c:otherwise>… <\/otherwise>?????????
\n??? <\/c:choose>
\n–>\u8fed\u4ee3:
\nforEach: <forEach var=”” items=”” varStatus=”” begin=”” end=””>
\nfoTokens: <foTodens var=”” items=”” delim=”,;|”> <\/foTodens>
\nJava,C#;SQL|C
\n2.I18N\u4e0e\u683c\u5f0f\u5316\u6807\u7b7e\u5e93
\n–>setLocale:\u8bbe\u7f6e\u672c\u5730\u533a\u57df
\n–>bundle:\u8bbe\u7f6e\u8d44\u6e90\u5305
\n–>setBundle:\u8bbe\u7f6e\u8d44\u6e90\u5305
\n–>message:\u8f93\u51fa\u6d88\u606f
\n3.SQL\u6807\u7b7e\u5e93
\n–>setDataSource:\u8bbe\u7f6e\u6570\u636e\u6e90,\u7528\u4e8e\u83b7\u5f97\u4e0e\u6570\u636e\u5e93\u7684\u8fde\u63a5
\n–>query:\u6267\u884c\u67e5\u8be2
\n–>update:\u6267\u884c\u589e,\u5220,\u6539
\n–>transaction:\u4e8b\u52a1
\n–>param:\u53c2\u6570
\n4.XML\u6807\u7b7e\u5e93<\/p>\n
\u8fc7\u6ee4\u5668:
\n\u751f\u547d\u5468\u671f:
\n1.\u5b9e\u4f8b\u534e:
\n2.\u521d\u59cb\u5316:init()
\n3.\u8fc7\u6ee4:doFilter()
\n4.\u9500\u6bc1:destroy()
\n5.\u4e0d\u53ef\u7528<\/p>\n
\u914d\u7f6e:
\n<filter>
\n<filter-name> <\/filter-name>
\n<filter-class> <\/filter-class>
\n<\/filter>
\n<filter-mapping>
\n<filter-name> <\/filter-name>
\n<url-pattern> <\/url-pattern>
\n<\/filter-mapping><\/p>\n
\u51e0\u4e2a\u91cd\u8981\u7684\u63a5\u53e3:
\n1.Filter:init(), doFilter(), destroy()
\n2.FilterChain: doFilter(request, response)
\n3.FilterConfig:getFilterName(), getInitParameter(),<\/p>\n
\u8fc7\u6ee4\u5668\u94fe:—>1—>2—>3—>Servlet \u8bf7\u6c42
\n<—-1 <—2 <—3 <—??????? \u54cd\u5e94<\/p>\n
MvC\u8bbe\u8ba1\u6a21\u5f0f
\n1.ModelI:jsp+JavaBean
\n2.ModelII:jsp+Servlet+JavaBean
\n? jsp—view
\n? servlet—control
\n? javabean—model<\/p>\n
MVC:
\nM–Model:\u6a21\u578b:\u8bbf\u95ee\u540e\u53f0\u6570\u636e\u5e93
\nV–view:\u89c6\u56fe:\u5c55\u793a
\nC–control:\u63a7\u5236\u5668:\u63a7\u5236\u7a0b\u5e8f\u6d41\u7a0b<\/p>\n
ModelII\u548cMVC\u7684\u5173\u7cfb:
\nMVC\u662f\u4e00\u79cd\u8bbe\u8ba1\u6a21\u5f0f,ModelII\u5b83\u662fMVC\u7684\u4e00\u79cd\u5177\u4f53\u7684\u5b9e\u73b0<\/p>\n","protected":false},"excerpt":{"rendered":"
Servlet\u4e09\u4e2a\u8981\u7d20: 1.\u5fc5\u987b\u7ee7\u627f\u81eaHttpServlet 2.\u5fc5\u987b\u5b9e\u73b0doGet()\u6216\u8005doPost() […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28],"tags":[],"class_list":["post-961","post","type-post","status-publish","format-standard","hentry","category-ssh"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts\/961","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/comments?post=961"}],"version-history":[{"count":0,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts\/961\/revisions"}],"wp:attachment":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/media?parent=961"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/categories?post=961"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/tags?post=961"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}