practica n° 7

3

ACTIVIDADES

Ejecutar y analizar la solución de cada uno de los ejemplos.

EJEMPLO 1

Desarrollar un script en JSP .

SOLUCIÓNarrayexample3.jsp

<html>

<head> <title>Chapter 5 Examples</title> </head>

<body> Simple Catalog Browsing Example <p> </p> <form method="POST" action="arrayexample3handler.jsp"> <table border="0" cellpadding="0" cellspacing="0" width="439"> <tr> <td width="157"><b>Browse Catalog</b></td> <td width="128"></td> <td width="148"></td> </tr> <tr> <td width="157" bgcolor="#C0C0C0"> <font color="#FFFFFF">Product</font> </td> <td width="128" bgcolor="#C0C0C0"> <font color="#FFFFFF">ListPrice</font> </td> <td width="148" bgcolor="#C0C0C0"> <font color="#FFFFFF">Select</font> </td> </tr> <tr> <td width="157">Wrox Press Beginning JSP</td> <td width="128">$49.99</td> <td width="148"> <input type="checkbox" name="productid" value="1" /> </td> </tr> <tr> <td width="157">Wrox Press Professional JSP</td> <td width="128">$59.99</td> <td width="148"> <input type="checkbox" name="productid" value="2" /> </td> </tr>

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<tr> <td width="157">Wrox Press Beginning Java</td> <td width="128">$39.99</td> <td width="148"> <input type="checkbox" name="productid" value="3" /> </td> </tr> </table> <p> <input type="submit" value="Add To Shopping Cart" name="AddToShoppingCartBtn" /> </p> </form> </body></html>

arrayexample3handler.jsp

<%@ page info="Array Example 3"%><%@ page import="com.wrox.begjsp.arrayexample3.ProductManager"%><%@ page import="com.wrox.begjsp.arrayexample3.Product"%>

<html>


<body> <b>Array Example 3 ( Response ) </b><br /><br />

<jsp:useBean id="pm" class="com.wrox.begjsp.arrayexample3.ProductManager" scope="session"> </jsp:useBean>

<% String[] selProducts = request.getParameterValues("productid");

int selProductsCount = 0;

if (selProducts == null) { out.println("You did not select any products"); } else { selProductsCount = selProducts.length; out.println("Your Shopping Cart now has :" +"<BR>"); for(int i=0;i<selProductsCount;i++) { int ProductId = Integer.parseInt(selProducts[i]); Product prod = pm.getProductDetails(ProductId); out.println(prod.getProductName()); out.println(prod.getProductPrice()); out.println("<BR>"); } }

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%> </body></html>

Product.java

package com.wrox.begjsp.arrayexample3;

public class Product {

private int productId; private String productName; private double productPrice;

public Product(int prodid, String prodname, double prodprice) { productId = prodid; productName = prodname; productPrice = prodprice; }

public int getProductId(){ return productId; }

public void setProductId(int ProductId){ this.productId = ProductId; }

public String getProductName(){ return productName; }

public void setProductName(String ProductName){ this.productName = ProductName; }

public double getProductPrice(){ return productPrice; }

public void setProductPrice(double productPrice){ this.productPrice = productPrice; }}

ProductManager.java

package com.wrox.begjsp.arrayexample3;

public class ProductManager {

private Product[] productList = new Product[3]; private int productCount;

public ProductManager() {

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initializeProductList(); }

private void initializeProductList() { productList[0] = new Product(1,"Wrox Press Beginning JSP",49.99); productList[1] = new Product(2,"Wrox Press Professional JSP",59.99); productList[2] = new Product(3,"Wrox Press Beginning Java",39.99);

}

public Product[] getProductList(){ return productList; }

public int getProductCount(){ return productList.length; }

public Product getProductDetails(int prodid) { int ProductIndex = -1; for(int i=0;i<this.getProductCount();i++) { if (prodid == productList[i].getProductId()) { ProductIndex = i; break; } }

if (ProductIndex != -1) { return productList[ProductIndex]; } else { return null; } }}

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EJEMPLO 2

Desarrollar un script en JSP.

SOLUCIÓN

bookPage4.jsp

<%@ page import="com.wrox.library.*" %>

<html> <head> <title>Inheritance</title> </head>

<body> <% Book techBook = new TechnicalBook("Car Mechanics"); Book childBook = new ChildrenBook("The Three Bears"); %>

TechnicalBook Type: <%= techBook.getType() %> <br /> ChildrenBook Type: <%= childBook.getType() %>

<% TechnicalBook techBook = new TechnicalBook("Car Mechanics"); ChildrenBook childBook = new ChildrenBook("The Three Bears"); %>

TechnicalBook toString(): <%= techBook.toString() %> <br /> ChildrenBook toString(): <%= childBook.toString() %> </body></html>

Book.java

package com.wrox.library;

public class Book {

private String title;

public String getTitle() { return title; }

public void setTitle(String title) { this.title = title; }

public Book() { }

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public Book(String title) { this.title = title; }

}

ChildrenBook.java


public class ChildrenBook extends Book {

private int minimumAge;

public int getMinimumAge() { return minimumAge; }

public void setMinimumAge(int a) { minimumAge = a; }

public String getType() { return "CHILDREN"; }

public ChildrenBook() { super(); }

public ChildrenBook(String title) { super(title); }}

TechnicalBook.java


public class TechnicalBook extends Book {

private String skillLevel;

public String getSkillLevel() { return skillLevel; }

public void setSkillLevel(String s) { skillLevel = s; }

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public String toString() { return getTitle(); }

public String getType() { return "TECHNICAL"; }

public TechnicalBook() { super(); }

public TechnicalBook(String title) { super(title); }

}

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EJEMPLO 3

Desarrollar un script en JSP que permita enviar datos y guardarlos en archivo.

SOLUCIÓN

DatosBean.htm

<html><head>

<title>Juan Perez JSP, Comentarios</title>

<meta name="autor" content="Juan Perez">

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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><meta name="generator" content="htm4l version 2.00">

<meta name="copyright" content="(c) 2004"><meta name="creacion" content="07-jul-2004 18:28:31"><meta name="modificacion" content="07-jul-2004 18:28:31"></head>

<body><h2>JSP, encuesta</h2>

<center><form method="post" action="EncuestaBean.jsp" name=""><br><table border=0 cols=5 width="80%" > <tr><td align="left"> <font face="Arial,Helvetica" size="-1" color="#000099"> <b>Introduzca su nombre:</b> <input type="text" name="usuario"> </td></tr> <tr><td align="center"> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr bgcolor="#999999"><td bgcolor="#003399"> <table width="100%" border="0" cellspacing="1" cellpadding="2"> <tr bgcolor="#FFFFFF"><td nowrap> <table width="100%" border="0" cellspacing="1" cellpadding="1" align="center"> <tr><td nowrap valign="top"> <font face="Arial,Helvetica" size="-1" color="#000099"> <b>Indique su sexo:</b></font><br> <font face="Verdana,Helvetica" size="-1" color="#000099"> <input type="radio" name="genero" value="Femenino" checked>Mujer<br> <input type="radio" name="genero" value="Masculino">Hombre<br> </font></td> <td nowrap valign="top"> <font face="Arial,Helvetica" size="-1" color="#000099"> <b>Seleccione su vehículo de preferencia:</b></font><br> <table width="100%" border="0" cellspacing="1" cellpadding="2"> <tr bgcolor="#FFFFFF"><td nowrap> <font face="Verdana,Helvetica" size="-1" color="#000099"> Moto:</font></td><td> <font face="Verdana,Helvetica" size="-1" color="#000099"> <select name="moto">

<option value="Ninguna">Ninguna</option><option value="Yamaha">Yamaha</option><option value="Honda">Honda</option><option value="Derby">Derby</option><option value="Aprilia">Aprilia</option><option value="Ducati">Ducati</option><option value="Bultaco">Bultaco</option><option value="BMW">BMW</option><option value="Kawasaki">Kawasaki</option><option value="Suzuki">Suzuki</option><br>

</select></font></td></tr> <tr bgcolor="#FFFFFF"><td nowrap> <font face="Verdana,Helvetica" size="-1" color="#000099"> Automóvil:</font></td><td> <font face="Verdana,Helvetica" size="-1" color="#000099"> <select name="coche">

<option value="Ninguno">Ninguno</option>

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<option value="Mercedes">Mercedes</option><option value="Porsche">Porsche</option><option value="Ferrari">Ferrari</option><option value="RollsRoyce">RollsRoyce</option><option value="BMW">BMW</option><option value="Toyota">Toyota</option><br>

</select></font></td></tr> </table> </td></tr> </table> </td></tr> </table> </td></tr> </table> </td></tr></table><br><br><center> <input type="submit" name="submit" value=" Aceptar "> <input type="reset" name="reset" value=" Borrar "></center></form></center>

</body></html>

// Autor: Juan Perez

// Copyright (c) 2004, Juan Perez

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<b><jsp:getProperty name="vbean" property="coche" /></b></font> </td></tr> <tr><td nowrap> <font face="Verdana,Helvetica" size="-1" color="#000099"> Moto:</font></td> <td nowrap> <font face="Verdana,Helvetica" size="-1" color="#990000"> <b><jsp:getProperty name="vbean" property="moto" /></b></font> </td></tr> </table> </td></tr> </table> </td></tr> </table> </td></tr> </table><% } %></body></html

ClaseBean.java

//// ClaseBean.java

// Todos los derechos reservados.//// No se asume ninguna responsabilidad por el uso o alteracion de este// software.//// Compilador: javac 1.3.0, Java 2 SDK

// Creacion: 19-Ago-2004 04:33:09// Revision:////--------------------------------------------------------------------------// Esta informacion no es necesariamente definitiva y esta sujeta a cambios// que pueden ser incorporados en cualquier momento, sin avisar.//--------------------------------------------------------------------------

/** * JavaBean utilizado para mostrar la separación d ela parte lógica, de la * parte de presentación de resultados de la encuesta. * La página HTML es la encargada de recoger la información del formulario * proporcionada por el usuario, que pasa el control a la página JSP, que * utiliza este Bean para el almacenamiento de los datos de cada una de * las propiedades del Bean y de guardarlos en disco, con el fichero de * nombre igual al del usuario. */package Beans;

import java.io.*;import java.util.Properties;

public class ClaseBean { private String usuario; private String genero; private String coche; private String moto;

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private String fichero;

// Métodos set() y get() correspondientes a las propiedades // del JavaBean, que se corresponden con los datos de entrada que // están presentes en el formulario de la página html

public String getUsuario() { return( usuario ); } public void setUsuario( String _usuario ) { usuario = _usuario; }

public String getGenero() { return( genero ); } public void setGenero( String _genero ) { genero = _genero; }

public String getCoche() { return( coche ); }

public void setCoche( String _coche ) { coche = _coche; }

public String getMoto() { return( moto ); } public void setMoto( String _moto ) { moto = _moto; }

public String getFichero() { return( fichero ); }

public void setFichero( String _fichero ) { fichero = _fichero; }

// Método que se encarga del almacenamiento del objeto Propiedades // en fichero de disco

public void store() throws IOException { Properties p = new Properties(); p.put( "usuario",usuario ); p.put( "genero",genero ); p.put( "coche",coche ); p.put( "moto",moto );

FileOutputStream fos = new FileOutputStream( fichero+"/"+usuario ); p.store( fos,"Encuesta de Vehículos, realizada a -- "+usuario ); fos.flush(); fos.close(); } }

//------------------------------------------- Final del fichero ClaseBean.java

Mgter. Juan Pablo Apaza Condori. 17

EJEMPLO 4

Desarrollar un script en JSP.

SOLUCIÓN

Counter.jsp

<%@page contentType="text/html"%><html><head><title>Counter</title></head><body>

<jsp:useBean id="counter" scope="page" class="com.wrox.counter.CounterBean"/>

<p>The current date is <jsp:getProperty name="counter" property="todaysDate"/></p>

<p><jsp:getProperty name="counter" property="message"/></p>

</body></html>

getphonelist.jsp

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

<%@ page import="com.wrox.begjsp.Phone.EmployeePhone" %><%@ page import="com.wrox.begjsp.Phone.PhoneManager" %>

<html>


<body> <h3><b>EMPLOYEE PHONE LIST</b></h3> <p> </p>

<jsp:useBean id="PhoneMgr" class="com.wrox.begjsp.Phone.PhoneManager"> </jsp:useBean>

<table border="0" cellpadding="0" cellspacing="0" width="439"> <tr> <td width="157"></td> <td width="128"></td> <td width="148"></td> </tr> <tr> <td width="157" bgcolor="#C0C0C0"> <font color="#FFFFFF">EmployeeId</font>

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</td> <td width="128" bgcolor="#C0C0C0"> <font color="#FFFFFF">EmployeeName</font> </td> <td width="148" bgcolor="#C0C0C0"> <font color="#FFFFFF">PhoneNo</font> </td> </tr>

<% Enumeration phoneListEnum = PhoneMgr.getPhoneList(); while (phoneListEnum.hasMoreElements()) { EmployeePhone empphone = (EmployeePhone)phoneListEnum.nextElement(); %>

<tr> <td width="157"><%=empphone.getEmployeeId()%></td> <td width="128"><%=empphone.getEmployeeName()%></td> <td width="148"><%=empphone.getPhoneNumber()%></td> </tr>

<% } %>

</table> </body>

</html>

getsortedphonelist.jsp



<html>


<body> <h3><b>EMPLOYEE PHONE LIST</b></h3> <p> </p>

<jsp:useBean id="PhoneMgr" class="com.wrox.begjsp.Phone.PhoneManager" > </jsp:useBean>

<table border="0" cellpadding="0" cellspacing="0" width="439"> <tr> <td width="157"></td>

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<td width="128"></td> <td width="148"></td> </tr> <tr> <td width="157" bgcolor="#C0C0C0"> <font color="#FFFFFF">EmployeeId</font> </td> <td width="128" bgcolor="#C0C0C0"> <font color="#FFFFFF">EmployeeName</font> </td> <td width="148" bgcolor="#C0C0C0"> <font color="#FFFFFF">PhoneNo</font> </td> </tr>

<% PhoneMgr.sortPhoneList(); Enumeration phoneListEnum = PhoneMgr.getPhoneList(); while (phoneListEnum.hasMoreElements()) { EmployeePhone empphone = (EmployeePhone)phoneListEnum.nextElement(); %>

<tr> <td width="157"><%=empphone.getEmployeeId()%></td> <td width="128"><%=empphone.getEmployeeName()%></td> <td width="148"><%=empphone.getPhoneNumber()%></td> </tr>

<% } %> </table> <p> </p> </form> </body>

</html>

login.jsp<html> <body> <form method="POST" action="loginhandler.jsp"> <div align="right"> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td width="100%">Login Screen</td> </tr> </table> <hr> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td width="100%" colspan="2"></td> </tr> <tr>

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<td width="10%">UserName</td> <td width="90%"> <input type="text" name="username" size="20"> </td> </tr> <tr> <td width="10%">Password</td> <td width="90%"> <input type="password" name="password" size="20"> </td> </tr> <tr> <td width="10%"></td> <td width="90%"></td> </tr> </table> </div> <p> <input type="submit" value="Login" name="LoginBtn"> <input type="reset" value="Reset" name="B2"> </p> </form> </body></html>

loginhandler.jsp<% String username = request.getParameter("username"); String password = request.getParameter("password");

if ((username.equalsIgnoreCase("wrox")) && (password.equalsIgnoreCase("wrox"))) { out.println("<H3>MAIN MENU</H3>"); out.println("<A href=getphonelist.jsp>Get Employee Phone No. List</a>" + "<BR>"); out.println("<A href=getsortedphonelist.jsp>" + "Get Sorted Phone No. List (Sorted by EmployeeName)</a>" + "<BR>"); out.println("<A href=search.jsp>Search for Phone No. List</a>" + "<BR>"); } else { out.println("UserName/Password combination is incorrect !!!"); out.println("<a href=login.jsp>Try Again</a>"); }%>

search.jsp

<html>


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<body> <h3>Search Form</h3> <br /> <form method="POST" action="searchresults.jsp"> <table border="0" cellpadding="0" cellspacing="0" width="439"> <tr> <td width="433" colspan="2"> <b> Look up for Employee ( Enter one of the following criteria) </b> </td> </tr> <tr> <td width="157">Employee Id</td> <td width="276"><input type="text" name="empid" size="21"></td> </tr> <tr> <td width="157">Employee Name</td> <td width="276"><input type="text" name="empname" size="21"></td> </tr> </table> <p><input type="submit" value="Search ..." name="SearchBtn"></p> </form> </body>

</html>

searchresults.jsp



<html>


<body> <h3><b>EMPLOYEE PHONE LIST - SEARCH RESULTS</b></h3> <p> </p>

<jsp:useBean id="PhoneMgr" class="com.wrox.begjsp.Phone.PhoneManager" > </jsp:useBean>

<table> <% Enumeration phoneListEnum = null;

String strempid = request.getParameter("empid");

if ((strempid != null) && (!strempid.equals(""))) {

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phoneListEnum = PhoneMgr.searchPhoneList(Integer.parseInt(strempid)); } else { String empname = request.getParameter("empname"); phoneListEnum = PhoneMgr.searchPhoneList(empname); }

while (phoneListEnum.hasMoreElements()) { EmployeePhone empphone = (EmployeePhone)phoneListEnum.nextElement(); %> <tr> <td width="157"><%=empphone.getEmployeeId()%></td> <td width="128"><%=empphone.getEmployeeName()%></td> <td width="148"><%=empphone.getPhoneNumber()%></td> </tr> <% } %> </table> <p> </p> <p></p> </body></html>

CounterBean.java

package com.wrox.counter;import java.util.*;import java.text.SimpleDateFormat;

public class CounterBean {

private Date curDate; private SimpleDateFormat dateFormat; private GregorianCalendar targetDate; private String name;

public CounterBean() {

GregorianCalendar currentDate = new GregorianCalendar(); curDate = (Date) currentDate.getTime();

dateFormat = new SimpleDateFormat("EEE, dd MMMM yyyy");

targetDate = new GregorianCalendar(); targetDate.set(targetDate.YEAR, 3000); targetDate.set(targetDate.MONTH, 0); targetDate.set(targetDate.DATE, 1); targetDate.set(targetDate.AM_PM, 0); targetDate.set(targetDate.HOUR, 0); targetDate.set(targetDate.MINUTE, 0); targetDate.set(targetDate.SECOND, 0);

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name = "the new millennium"; }

public String getTodaysDate() { return dateFormat.format(curDate); }

public void setTargetYear(int year) { targetDate.set(targetDate.YEAR, year); }

public void setTargetMonth(int month) { targetDate.set(targetDate.MONTH, month); }

public void setTargetDate(int date) { targetDate.set(targetDate.DATE, date); }

public void setTargetAmPm(int ampm) { targetDate.set(targetDate.AM_PM, ampm); }

public void setTargetHour(int hour) { targetDate.set(targetDate.HOUR, hour); }

public void setTargetMinute(int minute) { targetDate.set(targetDate.MINUTE, minute); }

public void setTargetSecond(int second) { targetDate.set(targetDate.SECOND, second); }

public void setTargetEvent(String eventName) { name = eventName; }

public String getTargetEvent() { return name; }

public String getMessage() { Date millDate = (Date) targetDate.getTime(); int dateTest = millDate.compareTo(curDate);

switch(dateTest) { case 1: long millisecs = (millDate.getTime()) - (curDate.getTime()); long msInDay = (1000*60*60*24); long daysToGo = (long) (millisecs/msInDay); return("Only " + daysToGo + " days to go until " + name + "!!!"); case 0:

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return("Welcome to the new Millenium!!!"); case -1: return("Sorry, counter has expired"); default: return("Counter error"); } }}

EmployeePhone.java

package com.wrox.begjsp.Phone;

public class EmployeePhone implements Comparable { int employeeId; String employeeName; String phoneNumber;

public EmployeePhone(int empid, String empname, String phonenum) { this.employeeId = empid; this.employeeName = empname; this.phoneNumber = phonenum; }

public int hashCode(){ return 17*employeeId; }

public boolean equals(Object obj) { if (!(obj instanceof EmployeePhone)) return false; EmployeePhone emp = (EmployeePhone)obj; if (emp.getEmployeeId() == this.employeeId) { return true; } else { return false; } }

public int compareTo(Object obj) { EmployeePhone emp = (EmployeePhone)obj; if ((this.employeeName.compareTo(emp.getEmployeeName())) > 0) { return 1; } else { return -1; } }

public int getEmployeeId() { return employeeId; }

public void setEmployeeId(int empid) { this.employeeId = empid; }

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public String getEmployeeName() { return employeeName; }

public void setEmployeeName(String empname) { this.employeeName = empname; }

public String getPhoneNumber() { return phoneNumber; }

public void setEmployeeId(String phoneNumber) { this.phoneNumber = phoneNumber; }}

PhoneManager.java

package com.wrox.begjsp.Phone;

import java.util.Vector;import java.util.Enumeration;import java.util.Collections;

public class PhoneManager {

private Vector phoneList = new Vector();

public PhoneManager() { initializePhoneList(); }

private void initializePhoneList() { EmployeePhone phone1 = new EmployeePhone(1,"Prashant","510-123-4567"); EmployeePhone phone2 = new EmployeePhone(2,"Archit","510-123-4580"); EmployeePhone phone3 = new EmployeePhone(3,"Ashish","510-123-3333");

phoneList.add(phone1); phoneList.add(phone3); phoneList.add(phone2);

}

public void sortPhoneList() { Collections.sort(phoneList); }

public Enumeration getPhoneList(){ return phoneList.elements();

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}

public int getPhoneListCount(){ return phoneList.size(); }

public Enumeration searchPhoneList(String empnamelike) { Vector resultList = new Vector();

Enumeration phonelistenum = phoneList.elements(); while (phonelistenum.hasMoreElements()) { EmployeePhone empphone = (EmployeePhone)phonelistenum.nextElement(); String empname = empphone.getEmployeeName(); if (empname.indexOf(empnamelike) != -1) { resultList.add(empphone); } } return resultList.elements(); }

public Enumeration searchPhoneList(int empid) { int PhoneIndex = -1; Vector resultList = new Vector(); Enumeration phonelistenum = phoneList.elements(); while (phonelistenum.hasMoreElements()) { EmployeePhone empphone = (EmployeePhone)phonelistenum.nextElement(); if (empphone.getEmployeeId() == empid) { resultList.add(empphone); break; } } return resultList.elements(); }}

practica n° 7

Technology