I have a jsp javabean problem

judge82

New Member

Join Date: Jul 2007
Posts: 24

I have a jsp javabean problem

Oct 30 '07, 05:08 PM

I have two JSPs, one takes a request and the other displays the result and I am having problem with the javabean to connect the two

here are my codes

takes request

Code:

<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<table border="1" align="center">
<tr>
<td colspan="3" bgcolor="black" align="center"><font color="orange" size="3">
Computer Voting Poll</font></td></tr>
<tr>
<td colspan="3" bgcolor="black" align="center"><font color="orange" size="3">
What is your favorite computer game?
</font></td></tr>
<tr><td width="20%" bgcolor="black"></td>
<td width="30%" bgcolor="black" align="left">

<FORM ACTION="PollResult.jsp">
<input type="radio" name="firstChoice" value="Oblivion" checked><font color="orange" size="2"> Oblivion </font><br>
<input type="radio" name="secondChoice" value="starwars"><font color="orange" size="2"> Star Wars: Empire at War </font><br>
<input type="radio" name="thirdChoice" value="finalfantasy"><font color="orange" size="2"> Final Fantasy XI: Online </font><br>


<input type="submit" value="vote button" name="Vote">





</td>
<td bgcolor="black" width="20%"></td>
</tr>

<tr><td bgcolor="black" colspan="3" align="center"><font color="orange" size="3">
</font><font color="white" size="3">Total Votes</font></td></tr>
<tr><td height="15" bgcolor="orange" colspan="3"></td></tr>
<tr><td align="left" bgcolor="black"><font color="white" size="3">0</font></td>
<td align="left" bgcolor="black"><font color="white" size="3">Oblivion</font></td>
<td align="center" bgcolor="black"><font color="white" size="3">0.00%</font></td>
</tr>
<tr><td align="left" bgcolor="black"><font color="white" size="3">0</font></td>
<td align="left" bgcolor="black"><font color="white" size="3">Star Wars: Empire at War</font></td>
<td align="center" bgcolor="black"><font color="white" size="3">0.00%</font></td>
</tr>
<tr><td align="left" bgcolor="black"><font color="white" size="3">0</font></td>
<td align="left" bgcolor="black"><font color="white" size="3">Final Fantasy XI: Online</font></td>
<td align="center" bgcolor="black"><font color="white" size="3">0.00%</font></td>
</tr>
<tr><td height="15" bgcolor="orange" colspan="3"></td></tr>
</table>
</body>
</html>

displays

Code:

<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<table border="1" align="center">
<tr>
<td colspan="3" bgcolor="black" align="center"><font color="orange" size="3">
Computer Voting Poll</font></td></tr>
<tr>
<td colspan="3" bgcolor="black" align="center"><font color="orange" size="3">
What is your favorite computer game?
</font></td></tr>
<tr><td width="20%" bgcolor="black"></td>
<td width="30%" bgcolor="black" align="left">


<input type="radio" name="firstChoice" value="Oblivion" checked><font color="orange" size="2"> Oblivion </font><br>
<input type="radio" name="secondChoice" value="starwars"><font color="orange" size="2"> Star Wars: Empire at War </font><br>
<input type="radio" name="thirdChoice" value="finalfantasy"><font color="orange" size="2"> Final Fantasy XI: Online </font><br>


<input type="submit" value="vote button" name="Vote">





</td>
<td bgcolor="black" width="20%"></td>
</tr>

  <TR><TH>
      Using jsp:setProperty</TABLE>
<jsp:useBean id="entry" class="core.BeanPoll" />

<jsp:setProperty 
    name="entry"
    property="firstChoice"
    param="firstChoice" />
<jsp:setProperty 
    name="entry"
    property="secondChoice"
    param="secondChoice" />
<jsp:setProperty 
    name="entry"
    property="thirdChoice"
    param="thirdChoice" />
<BR>

<tr><td bgcolor="black" colspan="3" align="center"><font color="orange" size="3">
</font><font color="white" size="3">Total Votes</font></td></tr>
<tr><td height="15" bgcolor="orange" colspan="3"></td></tr>
<tr><td align="left" bgcolor="black"><font color="white" size="3">0</font></td>
<td align="left" bgcolor="black"><font color="white" size="3">Oblivion</font></td>
<td align="center" bgcolor="black"><font color="white" size="3"><jsp:getProperty name="entry" property="firstChoice" />%</font></td>
</tr>
<tr><td align="left" bgcolor="black"><font color="white" size="3">0</font></td>
<td align="left" bgcolor="black"><font color="white" size="3">Star Wars: Empire at War</font></td>
<td align="center" bgcolor="black"><font color="white" size="3"><jsp:getProperty name="entry" property="secondChoice" />0.00%</font></td>
</tr>
<tr><td align="left" bgcolor="black"><font color="white" size="3">0</font></td>
<td align="left" bgcolor="black"><font color="white" size="3"><jsp:getProperty name="entry" property="thirdChoice" />Final Fantasy XI: Online</font></td>
<td align="center" bgcolor="black"><font color="white" size="3">0.00%</font></td>
</tr>
<tr><td height="15" bgcolor="orange" colspan="3"></td></tr>
</table>
</body>
</html>

javabean

Code:

/*
 * BeanPoll.java
 *
 * Created on October 29, 2007, 11:18 PM
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package core;

/** Simple bean to illustrate the various forms
 *  of jsp:setProperty.
 *  <P>
 *  Taken from Core Servlets and JavaServer Pages 2nd Edition
 *  from Prentice Hall and Sun Microsystems Press,
 *  http://www.coreservlets.com/.
 *  &copy; 2003 Marty Hall; may be freely used or adapted.
 */

public class BeanPoll {
  private String firstChoice = "unknown";
  private String secondChoice = "unknown";
  private String thirdChoice = "unknown";

  public String getfirstChoice() {
    return(firstChoice);
  }

  public void setfirstChoice(String firstChoice) {
    if (firstChoice != null) {
      this.firstChoice = firstChoice;
    } else {
      this.firstChoice = "unknown";
    }
  }

  public String getsecondChoice() {
    return(secondChoice);
  }

  public void setsecondChoice(String secondChoice) {
    if (secondChoice !=null) {
        this.secondChoice = secondChoice;
    } else {
        this.secondChoice = "unknown";
    } 
  }

  public String setthirdChoice() {
    return(thirdChoice);
  }

  public void setthirdChoice(String thirdChoice) {
    if (thirdChoice !=null) {
        this.thirdChoice = thirdChoice;
    } else {
        this.thirdChoice = "unknown";
    }
  }
  
  // In real life, replace this with database lookup.
  // See Chapters 17 and 18 for info on accessing databases
  // from servlets and JSP pages.
  
  public double getPollResult() {
    double result;

  public double getTotalCost() {
    return(getItemCost() * getNumItems());
  }
}

thanks for your time

Tags: None

r035198x

MVP

Join Date: Sep 2006

Posts: 13225
#2

Oct 30 '07, 05:15 PM

What exact problem are you having? Compilation error?
Comment
judge82

New Member

Join Date: Jul 2007

Posts: 24
#3

Oct 30 '07, 05:27 PM

I sincerely believe my javabean is crappy. I am SIS person and I am too bad with java.

I thing the first part is ok, like the set......
but I don't know how to do the get

i am trying to create a voting poll that has three choices. After making a choice, you can click vote and it shows you how many total votes have taken place and show the individual votes for each of the 3 choices and then show a percentage of total votes for each of the 3 choices.
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