實(shí)驗(yàn)2JSP程序設(shè)計(jì)

PAGEPAGE1漳州師范學(xué)院實(shí)驗(yàn)報(bào)告班級(jí)學(xué)號(hào)姓名 成績(jī)同組人 實(shí)驗(yàn)日期課程名稱：JSP程序設(shè)計(jì)1.實(shí)驗(yàn)項(xiàng)目：JSP頁(yè)面結(jié)構(gòu)、指令2.實(shí)驗(yàn)?zāi)康模赫莆認(rèn)SP構(gòu)成，指令及tag文件及使用3.實(shí)驗(yàn)環(huán)境的配置：PC兼容機(jī)。軟件：操作系統(tǒng)WINDOWS。4.實(shí)驗(yàn)內(nèi)容及要求：（1）編寫兩個(gè)Tag文件Rect.tag和Circle.tag。Rect.tag負(fù)責(zé)計(jì)算并顯示矩形面積，Circle.tag負(fù)責(zé)計(jì)算并顯示圓形面積。編寫lianxi_tag.jsp,使用Tag標(biāo)記調(diào)用Rect.tag和Circle.tag。調(diào)用Rect.tag時(shí)，向其傳遞矩形的兩個(gè)邊的長(zhǎng)度；調(diào)用Circle.tag時(shí)，向其傳遞圓的半徑。（2）編寫兩個(gè)jsp文件Rect.jsp和Circle.jsp。Rect.jsp負(fù)責(zé)計(jì)算并顯示矩形面積，Circle.jsp負(fù)責(zé)計(jì)算并顯示圓形面積。編寫lianxi_include.jsp,使用include動(dòng)作調(diào)用Rect.jsp和Circle.jsp。調(diào)用Rect.jsp時(shí)，向其傳遞矩形的兩個(gè)邊的長(zhǎng)度；調(diào)用Circle.jsp時(shí)，向其傳遞圓的半徑。（3）用forward動(dòng)作，實(shí)現(xiàn)(2)5、實(shí)驗(yàn)步驟：一1.在目錄“C:\ProgramFiles\ApacheSoftwareFoundation\Tomcat6.0\webapps\ROOT”中新建3個(gè)文件，分別重命名為lianxi_tag.jsp，Circle.tag，Rect.tag。2.分別在3個(gè)文件中編寫代碼，三個(gè)文件的主要代碼如下：lianxi_tag.jsp的主要代碼:<%@pagecontentType="text/html;charset=gb2312"language="java"%><%@taglibtagdir="/WEB-INF/tags"prefix="rect"%><%@taglibtagdir="/WEB-INF/tags"prefix="c"%>標(biāo)簽body中的代碼<center><fontsize=9color="blue">輸入圓的半徑或矩形的長(zhǎng)和寬<formaction=""method=getname=form><table><tr><td>輸入長(zhǎng)l：</td><td><inputtype="text"name="a"></td></tr><tr><td>輸入寬w：</td><td><inputtype="text"name="b"></td></tr><tr><td>輸入半徑r：</td><td><inputtype="text"name="r"></td></tr></table><br><inputtype="submit"value="提交"name="submit"></form><%Stringa=request.getParameter("a");Stringb=request.getParameter("b");Stringra=request.getParameter("r");if(a==null||b==null||ra==null){a="0";b="0";ra="0";}if(a.length()>0&&b.length()>0||ra.length()>0){%><rect:Rectwidth="<%=a%>"length="<%=b%>"/><br>矩形的面積為<%=area%><c:Circleradio="<%=ra%>"/><br>圓的面積為<%=area%><%}%></font></center>Circle.tag的主要代碼:<%@attributename="radio"required="true"%><%@variablename-given="area"variable-class="java.lang.Double"scope="AT_END"%><%!finaldoublePI=Math.PI;publicdoublegetCircleArea(doubler){returnPI*r*r;}%><%try{doubler=Double.parseDouble(radio);doubleresult=0;result=getCircleArea(r);jspContext.setAttribute("area",newDouble(result));}catch(Exceptione){jspContext.setAttribute("area",newDouble(-1.0));}%>Rect.tag的主要代碼:<%@attributename="width"required="true"%><%@attributename="length"required="true"%><%@variablename-given="area"variable-class="java.lang.Double"scope="AT_END"%><%!publicdoublegetRectArea(doublea,doubleb){returna*b;}%><%try{doublea=Double.parseDouble(width);doubleb=Double.parseDouble(length);doubleresult=0;result=getRectArea(a,b);jspContext.setAttribute("area",newDouble(result));}catch(Exceptione){jspContext.setAttribute("area",newDouble(-1.0));}%>3.保存文件，在目錄C:\ProgramFiles\ApacheSoftwareFoundation\Tomcat6.0\webapps\ROOT\WEB-INF中新建文件夾tags，將Circle.tag和Rect.tag移到tags下。在瀏覽器地址欄中輸入:8080/lianxi_tag.jsp，瀏覽結(jié)果如下：分別輸入值后，結(jié)果如下：二、分別在目錄C:\ProgramFiles\ApacheSoftwareFoundation\Tomcat6.0\webapps\ROOT下新建lianxi_include.jsp、Circle.jsp、Rect.jsp，并在其中編寫代碼：lianxi_include.jsp的主要代碼如下：<center><fontsize="9"color="blue"><formaction=""method=getname=form1><table><tr><td>輸入長(zhǎng)l：</td><td><inputtype="text"name="length"></td></tr><tr><td>輸入寬w：</td><td><inputtype="text"name="width"></td></tr><tr><td>輸入半徑r：</td><td><inputtype="text"name="circle"></td></tr></table><br><inputtype="submit"value="提交"name="submit"></form><jsp:includepage="Rect.jsp"><jsp:paramname="len"value="<%=request.getParameter("length")%>"/><jsp:paramname="wid"value="<%=request.getParameter("width")%>"/></jsp:include><jsp:includepage="Circle.jsp"><jsp:paramname="cir"value="<%=request.getParameter("circle")%>"/></jsp:include></font></center>Circle.jsp的主要代碼如下：<%!finaldoublePI=Math.PI;publicdoublegetCircleArea(doubler){returnPI*r*r;}%><%try{Stringra=request.getParameter("cir");if(ra==null){ra="0";}if(ra.length()>0){doublec=Double.parseDouble(ra);%><br>圓的面積為<%=getCircleArea(c)%><%}}catch(Exceptione){%><br>不合理的計(jì)算<%}%>Rect.jsp的主要代碼如下：<%!publicdoublegetRectArea(doublea,doubleb){returna*b;}%><%try{Stringl=request.getParameter("len");Stringw=request.getParameter("wid");if(l==null||w==null){l="0";w="0";}if(l.length()>0&&w.length()>0){doublea=Double.parseDouble(w);doubleb=Double.parseDouble(l);%><br>矩形的面積為<%=getRectArea(a,b)%><%}}catch(Exceptione){%><br>不合理的計(jì)算<%}%>保存文件，在瀏覽器中輸入:8080/lianxi_include.jsp，結(jié)果如下：輸入值后，結(jié)果為：三、分別在目錄C:\ProgramFiles\ApacheSoftwareFoundation\Tomcat6.0\webapps\ROOT下新建lianxi_forward.jsp、Circle1.jsp、Rect1.jsp，并在其中編寫代碼：lianxi_forward.jsp的主要代碼為：<center><formaction=""method=getname=form>請(qǐng)選擇要進(jìn)行哪種面積的計(jì)算<br><inputtype="radio"name="area"value="1">矩形<inputtype="radio"name="area"value="0">圓<table><tr><td>輸入長(zhǎng)l：</td><td><inputtype="text"name="length"value="0"></td></tr><tr><td>輸入寬w：</td><td><inputtype="text"name="width"value="0"></td></tr><tr><td>輸入半徑r：</td><td><inputtype="text"name="circle"value="0"></td></tr></table><br><inputtype="submit"value="確定"name="submit"></form><%Stringa=request.getParameter("area");if(a==null)a="請(qǐng)選擇";try{intn=Integer.parseInt(a);if(n==1){%><jsp:forwardpage="Rect1.jsp"><jsp:paramname="len"value="<%=request.getParameter("length")%>"/><jsp:paramname="wid"value="<%=request.getParameter("width")%>"/></jsp:forward><%}elseif(n==0){%><jsp:forwardpage="Circle1.jsp"><jsp:paramname="cir"value="<%=request.getParameter("circle")%>"/></jsp:forward><%}}catch(Exceptione){%><br>沒有相關(guān)的計(jì)算<%}%></center>Circle1.jsp的主要代碼：<center><fontsize="9"color="blue"><%!finaldoublePI=Math.PI;publicdoublegetCircleArea(doubler){returnPI*r*r;}%><%try{Stringra=request.getParameter("cir");if(ra==null){ra="0";}if(ra.length()>0){doublec=Double.parseDouble(ra);%><br>圓的面積為<%=getCircleArea(c)%><%}}catch(Exceptione){%><br>不合理的計(jì)算<%}%><br