jsp第二课-jsp语法

1. JSP椤甸?㈢???烘??缁???

? JSP椤甸?㈠????绉???绱?缁???????锛??? ??????HTML??璁扮?????JSP??璁帮?濡???浠ゆ??璁般???ㄤ???璁帮??????????????规?锛???Java绋?搴???锛???Java琛ㄨ揪寮??

澶???杩?绋?锛?

? 1.??JSP椤甸??腑??????HTML??璁扮???凤?浜ょ?瀹㈡?风??娴?瑙??ㄦ?ц??剧ず??

? 2.JSP??璁般???版?????规?澹版????Java绋?搴?????omcat???″?ㄨ?璐ｆ?ц?锛?灏???瑕??剧ず??缁???????缁?瀹㈡?风??娴?瑙??ㄣ??

? 3. Java琛ㄨ揪寮???omcat???″?ㄨ?璐ｈ?＄??锛?灏?缁???杞???涓哄??绗?覆锛?浜ょ?瀹㈡?风??娴?瑙??ㄨ?璐ｆ?剧ず???

2. JSP椤甸?㈢?????????????规??

? 1.??SP椤甸?㈢????璁扮????<%!??????锛?>??涔??村０????????绉颁?JSP椤甸?㈢?????????? .

? 2. JSP椤甸?㈠?ㄢ??<%!??????锛?>??涔??村０??瀹?涔? ??规? .

3. Java绋?搴????

?ㄢ??<%??????%>??涔??存????ava绋?搴????

绋?搴???涓?澹版????????绉颁负JSP椤甸?㈢??灞??ㄥ?????

澶?涓?瀹㈡?疯?锋?涓?涓?JSP椤甸?㈡??, Java绋?搴???灏?琚??ц?澶?娆★??????ㄤ?????绾跨?涓??ц????

4. Java琛ㄨ揪寮??

??<%=??????%>??涔??村??浠ユ??涓?涓?Java琛ㄨ揪寮? .

琛ㄨ揪寮????肩?辨???″?ㄨ?璐ｈ?＄??锛?骞跺?璁＄??缁????ㄥ??绗?覆褰㈠??????板?㈡?风???剧ず?? . ?

5.JSP涓???娉ㄩ???

?HTML娉ㄩ???煎?:

? ? ? <!-- ? ?娉ㄩ????瀹?? ? -->?

?JSP娉ㄩ???煎?:

? ? ? <%-- ?娉ㄩ????瀹??--%>?

6. JSP ??浠ゆ??璁奥?

page ??浠ゆ??璁?

? page ??浠ょ?ㄦ?ュ??涔??翠釜JSP椤甸?㈢??涓?浜?灞??у??杩?浜?灞??х???硷?灞??у?肩?ㄥ??寮??锋????寮??锋??璧锋?ャ????浠ョ?ㄤ?涓?page??浠ゆ??瀹?澶?涓?灞??х????,涔???浠ヤ娇?ㄥ?涓?page??浠ゅ????涓烘??涓?灞??ф??瀹???.

? page??浠ょ??浣??ㄥ?规?翠釜JSP椤甸?㈡????锛?涓??朵功????浣?缃????筹?涔?????page??浠ゅ????SP椤甸?㈢??????????渚?濡?:

? <%@ page ? 灞???=??灞??????尖?? ?灞???= ??灞??????尖?? ?????>?

??

? <%@ page ? 灞???="灞??????? ?%>

? <%@ page ? 灞???="灞??????? ?%>

? ????

? <%@ page ? 灞???="灞??????? ?%>?

page ??浠ゆ??璁板??浠ユ??瀹?濡?涓?灞??х???硷?

contentType??import??language??session??buffer??auotFlush ??isThreadSafe??pageEncoding?

contentType灞????

? contentType 灞??у?肩‘瀹?JSP椤甸?㈠??搴???MIME锛?Multipurpose Internet Mail Extention锛?绫诲????JSP椤甸?㈠??绗???缂?????

? ?渚?濡?:

<%@ page contentType="text/html;charset=GB2312" %>?

? ?涓???璁镐袱娆′娇??age ??浠ょ?contentType灞??ф??瀹?涓?????灞??у??

import 灞???

璇ュ??х??浣??ㄦ??涓?SP椤甸?㈠???ava杩?琛???澧???渚?????涓???绫伙?杩??峰氨??浠ュ??SP椤甸?㈢??绋?搴????ㄥ???????????芥?板０???ㄥ????琛ㄨ揪寮??ㄥ??浣跨?ㄥ??涓???绫汇??

渚?濡?:

<%@ page ?import="java.io.*", "java.util.Date" %>

language灞???

瀹?涔?JSP椤甸??娇?ㄧ??????璇?瑷?锛?璇ュ??х???肩???????藉??"java"??

涓?anguage灞??ф??瀹??肩???煎?锛?

<%@ page ?language="java" %>

session ?灞???

?ㄤ?璁剧疆??????瑕?浣跨?ㄥ??缃???session瀵硅薄??session??灞??у?煎??浠ユ??true??false??session灞??ч?璁ょ??灞??у?兼??true??

buffer 灞???

??缃?杈??烘?瀵硅薄out璐?璐ｅ????″?ㄧ????浜?淇℃????杩?琛?缁????????板?㈡?风???剧ず锛?buffer灞??х?ㄦ?ユ??瀹?out璁剧疆??缂??插?虹??澶у???涓?浣跨?ㄧ??插?恒??渚?濡?锛?

<%@ page buffer= ??24kb?? %>buffer灞??х??榛?璁ゅ?兼??8kb ??buffer灞??у??浠ュ???? none"锛?璁剧疆out涓?浣跨?ㄧ??插?恒??

autoFlush 灞???

??瀹?out??缂??插?鸿?濉?婊℃?讹?缂??插?烘???????ㄥ?锋?般??

isThreadSafe 灞???

?ㄦ?ヨ?剧疆JSP椤甸?㈡??????澶?绾跨?璁块?????

include ??浠ゆ??璁奥?

濡?????瑕???SP椤甸?㈠????澶??翠?宓??ヤ?涓???浠讹?灏卞??浠ヨ????浣跨??nclude??浠ゆ??璁帮??惰??娉??煎?濡?涓?锛?

<%@ include file= "??浠剁??URL " %>?

濡???璇ユ??浠跺??褰???JSP椤甸?㈠?ㄥ??涓?Web???＄??褰?涓?锛??ｄ?????浠剁??URL??灏辨????浠剁????瀛?锛?濡???璇ユ??浠跺??SP椤甸?㈡???ㄧ??Web???＄??褰???涓?涓?瀛???褰?涓?锛?姣?濡?fileDir瀛???褰?涓?锛??ｄ?????浠剁??URL??灏辨????fileDir/??浠剁????瀛??????

???????ワ?灏辨??褰???JSP椤甸?㈠?????ョ????浠跺??骞舵??涓?涓??扮??JSP椤甸????跺??JSP寮?????灏?杩?涓??扮??JSP椤甸?㈣浆璇???Java??浠躲???

7.JSP ?ㄤ???璁奥?

include ?ㄤ???璁奥?

<jsp:include page= "??浠剁??URL"/>

??

<jsp:include page= "??浠剁??URL">

? ?param瀛???璁?

</jsp:include>

?include ?ㄤ???璁版????SP椤甸?㈣?琛??舵??澶?????浠讹?琚?澶???????浠跺?ㄩ?昏???璇?娉?涓???绔?浜?褰???JSP椤甸?? 瑕?涓?include ??浠ゆ??璁扮?稿?哄????

param?ㄤ???璁奥?

param??璁颁互????瀛????尖??瀵圭??褰㈠?涓哄?跺????璁版??渚?????淇℃??.

param??璁颁??界??绔?浣跨?????浣?涓?sp:include??jsp:forward??jsp:plugin??璁扮??瀛???璁版?ヤ娇?ㄣ??

param?ㄤ???璁拌??娉??煎?锛?

<jsp:param ?name= ????瀛??? ?value= ????瀹?缁?param???尖??>

褰?璇ユ??璁颁?jsp:include?ㄤ???璁颁?璧蜂娇?ㄦ?讹???浠ュ?param??璁颁腑???间?????nclude?ㄤ???璁拌???杞界????浠朵腑?伙?琚???杞界??JSP??浠跺??浠ヤ娇??omcat???″?ㄦ??渚???request??缃?瀵硅薄?峰??include?ㄤ???璁扮??param瀛???璁颁腑name灞??ф????渚????悸?

forward ?ㄤ???璁?

? 璇ユ??浠ょ??浣??ㄦ??锛?浠?璇ユ??浠ゅ???姝㈠???椤甸?㈢??缁х画?ц?锛???杞????ц?page灞??ф??瀹???JSP椤甸?????

<jsp:forward page="瑕?杞?????椤甸?? />

??

<jsp:forward page="瑕?杞?????椤甸?? >

? ?param瀛???璁?

</jsp:forward>?

useBean ?ㄤ???璁奥?

? ?璇ユ??璁扮?ㄦ?ュ??寤哄苟浣跨?ㄤ?涓?Javabean锛?????甯搁??瑕???涓?涓??ㄤ???璁帮???浠?灏??ㄧ??4璇捐???璁ㄨ?恒??Sun???哥???″?兼??锛???TML瀹???JSP椤甸?㈢???????ㄥ??锛???avabean瀹????ㄦ???ㄥ??锛?瀹??扮??姝ｆ??涔?涓??????????ㄦ????绂汇???

渚?瀛?锛?

example2_1.jsp

<%@ page contentType="text/html;charset=GB2312" %> ?<!-- jsp??浠ゆ??璁?-->

<%@ page import="java.util.Date" ?%> ? ? ? ? ? ? ? ?<!-- jsp??浠ゆ??璁?-->

<%! ? Date date; ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? // ?版??澹版??

? ? ? int start,end,sum;

? ? ? public int continueSum(int start,int end) ? ?// ?规?澹版???

? ? ? { ?for(int i=start;i<=end;i++) ?

? ? ? ? ? ? sum=sum+i;?

? ? ? ? ?return sum;

? ? ? }

? %>

<HTML><BODY bgcolor=cyan> ? ? ? ? ? ? ? ? ? ? ? ? <!??html??璁?-->?

<FONT size=4><P>绋?搴?????寤?ate瀵硅薄锛?

? ?<% date=new Date(); ? ? ? ? ? ? ? ? ? ? ? ? ? ?//java绋?搴????

? ? ? out.println("<BR>"+date);

? ? ? start=1;

? ? ? end=100;

? ? ? sum=continueSum(start,end);

? ?%>

<BR>浠?

? ?<%= start %> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? <!-- Java琛ㄨ揪寮? -->?

? ???

? ?<%= end %>?

? ???杩?缁?????

? ?<%= sum %>?

</FONT></BODY></HTML>

渚?瀛?锛?

example2_2.jsp锛?

<%@ page contentType="text/html;charset=GB2312" %>

<HTML><BODY BGCOLOR=cyan><FONT size=3>

?<%! int i=0;

?%>

?<% i++;

?%>

<P>?ㄦ??绗?

? <%= i %>

?涓?璁块????绔???瀹㈡?枫??

</BODY></HTML> ?

渚?瀛?3

example2_3.jsp锛?

<%@ page contentType="text/html;charset=GB2312" %>

<HTML><BODY bgcolor=cyan>

? ?<%! double x,y;?

? ? ? ?double multi(double x,double y)

? ? ? ?{ ?return x*y;

? ? ? ?}

? ? ? ?double div(double x,double y)?

? ? ? ?{ ?return x/y;

? ? ? ?}

? ?%>

? ?<% ?x=127;

? ? ? ?y=18;

? ? ? ?out.println("璋???ulti?规?璁＄??"+x+"涓?"+y+"涔?绉?锛?");

? ? ? ?double a=multi(x,y);

? ? ? ?out.println(a);

? ? ? ?x=a;

? ? ? ?out.println("<BR>璋???iv?规?璁＄??"+x+"?や互"+y+"????锛?");

? ? ? ?double b=div(x,y);

? ? ? ?out.println(b);?

? ?%>

</BODY></HTML>

渚?瀛?4

example2_4.jsp

<%@ page contentType="text/html;Charset=GB2312" %>

<HTML><BODY>

? ?<%! int count=0; ? ? ? ? ? ? ? ?//琚?瀹㈡?峰?变韩??count

? ? ? ?synchronized void setCount() ?//synchronized淇?楗扮???规?

? ? ? ?{ ? count++;

? ? ? ?}

? ?%>

? ?<% ?setCount();

? ? ? ? out.println("?ㄦ??绗?"+count+"涓?璁块????绔???瀹㈡??); ??

? ?%>

</BODY></HTML>

渚?瀛?5

example2_5.jsp

<%@ page contentType="text/html;Charset=GB2312" %>

<HTML><BODY bgcolor=cyan>

?<P> 杈??鸿?辨??瀛?姣?.

?<% ?char start='A',end='M',c;

? ? ? int size=2;

?%>

?<BR> ??lt;%=size %>纾?瀛??疯???

?<Font size=<%=size%>>

?<% ?for(c=start;c<=end;c++)

? ? ? {

?%> ? ? <%= c %>,

?<% ?}

?%>

?</Font>

?<% ?size=4;

? ? ?start=(char)(end+1);

? ? ?end='Z';

?%>

<BR> ??lt;%=size %>纾?瀛??疯???

?<Font size=<%=size%>>

?<% ?for(c=start;c<=end;c++)

? ? ? {

?%> ? ? <%= c %>,

?<% ?}

?%>

?</Font></BODY></HTML>

渚?瀛?6

example2_6.jsp锛?

<%@ page contentType="text/html;charset=GB2312" %>

<HTML><BODY ?bgcolor=cyan><FONT size=3>

<% ?double a=12.89;

? ?int x=12,y=10;

%>

璁＄??琛ㄨ揪寮?a+x*y-100/x+x%5?????

?<%= a+x*y-100/x+x%5 %>

<BR>璁＄??琛ㄨ揪寮?x>y&&a>0????

?<%=x>y&&a>0%>

<BR>璁＄??琛ㄨ揪寮?sin(x)+cos(y):

?<%=Math.sin(x)+Math.cos(y)%>

<BR> 姹?8??骞虫?规??

?<%=Math.sqrt(8)%>

</FONT></BODY></HTML>

渚?瀛?7

example2_7.jsp锛?

<%@ page contentType="text/html;charset=GB2312" %>

<HTML><BODY>

?<!-- 浠ヤ?瀛?浣???棰??蹭负????-->

?<FONT size=3 color=blue>?藉??瀛?绗?覆"C:\myfile\jspfile\example.jsp"涓???"example.jsp"?

</FONT>

? <%-- 涓??㈡????????????澹版?? --%>

?<%! ?String s="C:\\myfile\\jspfile\\example.jsp";

?%>

?<%-- 涓??㈡??Java绋?搴??? --%>

?<% ?int index=s.lastIndexOf("\\");?

? ? ?String str=s.substring(index+1);

?%>

?<BR><%-- 涓??㈡??Java琛ㄨ揪寮? --%>?

?<%= str %>

</BODY></HTML> ?

渚?瀛?8

first.jsp

<%@ page contentType="text/html;Charset=GB2312" %>?

<HTML><BODY BGCOLOR=cyan> ? ? ? ? ? ? ? ? ? ??

<FONT Size=3> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ??

<P>浣跨??tml澶??????ュ???扮??淇℃??.

? <input type=text size=10> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

</FONT></BODY></HTML>

second.jsp

<%@ page contentType="application/vnd.ms-powerpoint" %>?

<HTML><BODY BGCOLOR=cyan> ? ? ? ? ? ? ? ? ? ??

<FONT Size=8> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ??

<P>????owerpoint搴??ㄧ?搴?澶??????ュ???扮??淇℃??.

<input type=text size=10> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

</FONT></BODY></HTML>

third.jsp

<%@ page contentType="image/x-xbitmap" %>?

<%@ page import="java.awt.*" %>

<%@ page import="java.io.*" %>

<%@ page import="java.awt.image.*" %>

<%@ page import="java.awt.geom.*" %>

<%@ page import="com.sun.image.codec.jpeg.*" %>

<% ? int width=260, height=260;

? ? BufferedImage image = new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);

? ? Graphics g = image.getGraphics();

? ? g.setColor(Color.white);

? ? g.fillRect(0, 0, width, height);

? ? Graphics2D g_2d=(Graphics2D)g;?

? ? Ellipse2D ellipse=new Ellipse2D. Double (40,50,100,40);

? ? g_2d.setColor(Color.blue);

? ? g_2d.draw(ellipse);

? ? Polygon polygon=new Polygon();

? ? polygon.addPoint(12,34);

? ? polygon.addPoint(51,134);

? ? polygon.addPoint(102,34);

? ? g_2d.drawPolygon(polygon);

? ? g_2d.dispose();

? ? OutputStream outClient= response.getOutputStream(); ? //?峰??????瀹㈡?风????杈??烘?

? ? JPEGImageEncoder encoder=JPEGCodec.createJPEGEncoder(outClient);

? ? encoder.encode(image);

%>

渚?瀛?9

example2_9.jsp

<%@ page contentType="text/html;charset=GB2312" %>

<%@ page info="娓???澶у?? %>

<% ?String s=getServletInfo();

%>

<head> ?<%= s %></head>

<HTML><BODY ?bgcolor=cyan><FONT Size=4>

<BR><%=s %>?虹??绀炬??涓??借?????虹??绀?

<BR><%=s %>???ㄥ?借??????楂?绛?瀛??

</BODY><HTML>

渚?瀛?10

firstExample2_10.jsp

<%@ page contentType="text/html;charset=GB2312" %>

<%@ include file="myfile/ok.txt" %>

<HTMLl><BODY bgcolor=cyan>

<P>????firstExample.jsp椤甸??

</BODY></HTML>

secondExample2_10.jsp锛?????濡???.9锛?b锛???绀猴?

<%@ page contentType="text/html;charset=GB2312" %>

<%@ include file="myfile/ok.txt" %>

<HTML><BODY bgcolor=yellow>

<P>????secondExample.jsp椤甸??

</BODY></HTML>

涓?杩?irstExample2_10.jsp绛?浠蜂?涓??㈢??JSP??浠?ame.jsp锛?

same.jsp

<%@ page contentType="text/html;Charset=GB2312" %>

<A href="firstExample2_10.jsp" target="_blank" rel="external nofollow" >娆㈣???irstExample2_10.jsp椤甸??lt;/A>

<BR>

<A href="secondExample2_10.jsp" target="_blank" rel="external nofollow" >娆㈣???econdExample2_10.jsp椤甸??lt;/A>

<HTML><BODY bgcolor=cyan>

<P>????firstExample.jsp椤甸??

</BODY></HTML>

渚?瀛?11

example2_11.jsp

<%@ page contentType="text/html;charset=GB2312" %>

<HTML><BODY ?bgcolor=yellow >

<% double a=3,b=4,c=5;

%>

<BR>??杞?rangle.jsp璁＄??涓?杈逛负<%=a%>,<%=b%>,<%=c%>??涓?瑙?褰㈤?㈢Н锛?

? <jsp:include page="myfile/trangle.jsp">

? ? <jsp:param name="sideA" value="<%=a%>"/>

? ? <jsp:param name="sideB" value="<%=b%>"/>

? ? <jsp:param name="sideC" value="<%=c%>"/>

? </jsp:include>

</BODY></HTML>

trangle.jsp

<%@ page contentType="text/html;charset=GB2312" %>?

<%! public String getArea(double a,double b,double c)

? ? { if(a+b>c&&a+c>b&&c+b>a)?

? ? ? ?{ ? double p=(a+b+c)/2.0;

? ? ? ? ? ?double area=Math.sqrt(p*(p-a)*(p-b)*(p-c)) ;

? ? ? ? ? ?return ""+area;

? ? ? ?}

? ? ?else?

? ? ? ?{ ?return(""+a+","+b+","+c+"涓??芥????涓?涓?涓?瑙?褰???娉?璁＄???㈢Н");

? ? ? ?}

? ?}

%>

<% ? String sideA=request.getParameter("sideA");

? ? ? String sideB=request.getParameter("sideB");

? ? ? String sideC=request.getParameter("sideC");

? ? ? double a=Double.parseDouble(sideA);

? ? ? double b=Double.parseDouble(sideB);

? ? ? double c=Double.parseDouble(sideC);

%>

<Font color=blue size=4>

<P>????琚???杞界????浠?璐?璐ｈ?＄??涓?瑙?褰㈢???㈢Н<BR>

? ?缁???浼?????涓?杈规??:<%=sideA%>,<%=sideB%>,<%=sideC%>

<BR>涓?瑙?褰㈢???㈢Н:<%= getArea(a,b,c)%>

</Font>

渚?瀛?12

example2_12.jsp

<%@ page contentType="text/html;charset=GB2312" %>

<HTML><BODY>

<% ?double i=Math.random();

? ?if(i>0.5)

? ?{

%> ?<jsp:forward page="frontSide.jsp" >

? ? ? ? ?<jsp:param name="number" value="<%= i %>" />

? ? </jsp:forward>?

<% ?}

? else

? ?{

%> ?<jsp:forward page="reverseSide.jsp" >

? ? ? ? ?<jsp:param name="number" value="<%= i %>" />

? ? ?</jsp:forward>?

<% }

%>

</BODY></HTML>

frontSide.jsp

<%@ page contentType="text/html;charset=GB2312" %>

<HTML><BODY bgcolor=cyan><Font size=3>

<% String s=request.getParameter("number");

? ?out.println("<BR>浼???杩??ョ???兼??"+s);

%>

<BR><img src=image/a.JPG width=120 height=120 >?卞??惧??</img>

</FONT></BODY></HTML>

reverseSide.jsp

<%@ page contentType="text/html;charset=GB2312" %>

<HTML><BODY bgcolor=cyan><Font size=3>

<% String s=request.getParameter("number");

? ?out.println("浼???杩??ョ???兼??"+s);

%>

<BR> <img src=image/b.JPG width=120 height=120 >?卞??惧??</img>

</FONT></BODY></HTML>

渚?瀛?13

example2_13.jsp锛?

<%@ page contentType="text/html;charset=GB2312" %>

<HTML><BODY>

?<jsp:plugin type="applet" code="B.class" jreversion="1.2" width="200" height="260">

? ? <jsp:fallback>

? ? ? ?Plugin tag OBJECT or EMBED not supported by browser.?

? ? </jsp:fallback>

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