第5章实验与训练指导答案.doc

第5章实验与训练指导答案1、 编写一个JSP页面，该页面提供了一个表单，用户可以通过表单输入梯形的上底、下底和高的值，并提交给本JSP页面，该JSP页面将计算梯形的面积任务交给一个Bean完成。JSP页面使用getProperty动作标记显示梯形的面积。ladder.jsp: 输入梯形上底、下底和高： 上底: 下底: 高: 输入梯形上底、下底和高： 上底:, 下底：, 高：.面积是： Ladder.java:package pfc;public class Ladderdouble top=0,bottom=0,height=0,area=-1;public double getArea() area=(top+bottom)*height/2; return area; public double getBottom() return bottom;public void setBottom(double bottom) this.bottom = bottom;public double getHeight() return height;public void setHeight(double height) this.height = height;public double getTop() return top;public void setTop(double top) this.top = top;2、 编写两个jsp页面a.jsp和b.jsp，a.jsp页面提供了一个表单，用户可以通过表单输入矩形的两个边长提交给b.jsp页面，b.jsp调用一个bean去完成计算矩形面积任务。b.jsp页面使用getProperty动作标记显示矩形面积。a.jsp: 输入矩形的长和宽： 长: 宽: b.jsp: 矩形的长和宽： 长:, 宽：, 面积是： Rectangle.java:package pfc;public class Rectangledouble longside=0,width=0,area=-1;public double getArea() area=longside*width; return area; public double getLongside() return longside;public void setLongside(double longside) this.longside = longside;public double getWidth() return width;public void setWidth(double width) this.width = width;3、 使用javabean实现用户登录login.html: 用户名： 密码： Login.jsp： welcome，,your loging password is ,enjoy yourself！ Login.java:package logbean;public class LoginString usrName;String usrPassword;public String getUsrName() return usrName;public void setUsrName(String usrName) this.usrName = usrName;public String getUsrPassword() return usrPassword;public void setUsrPassword(String usrPassword) this.usrPassword = usrPassword;4、使用javabean实现简单购物车1）Shop.html: welcome to my shop select the fruit you want to buy apple bananaorange 2）car.jsp:你购买的水果如下 %car.setSubmit(request.getParameter(sub); String action=car.getSubmit(); if (action.equals(buy) if(!car.addItem(request.getParameter(item) out.println(you have choosed this kind of fruit!); else car.removeItem(request.getParameter(item); String shop =car.getItems();for(int i=0;i3）Mycar.java:package car;import java.util.Vector;public class Mycar Vector v=new Vector();String submit=null;String item=null;public String getItems() String items=new Stringv.size();v.copyInto(items);return items;public void setItem(String item) this.item = item;public String getSubmit() return submit;public void setSubmit(String submit) this.submit = submit;public boolean addItem(String item)i