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Posted to users@tomcat.apache.org by Ying Sun <Yi...@Cylogix.com> on 2001/04/11 16:19:40 UTC
Re:please advise me here
Hi all,
I happened to a strange problems.
The command prompt window display every bean id and question as expected from
database.
but the <jsp:getProperty name="faq" property="ID">
<jsp:getProperty name="faq" property="question"> doesn't work,
it suppose look like
id question
1 what's this
2 what's that
but now it look like
id
0
0
and also the bean property is id,why we need to put ID in <jsp:getProperty
name="faq" property="ID"> .
thank you all in advance
<%@ page import="com.taglib.wdjsp.faqtool.*"
errorPage="error.jsp" %>
<jsp:useBean id="faq" class="com.taglib.wdjsp.faqtool.FaqBean"/>
<%
FaqBean[] faqs = (FaqBean[])request.getAttribute("faqs");
%>
<html>
<head><title>Update Menu</title></head>
<form name="menu" action="/webdev/servlet/FaqAdminServlet" method="post">
<table border="1" align="center"><tr><td>
<table bgcolor="tan" border="1" align="center" cellpadding="10"
cellspacing="0">
<tr><th colspan="2">FAQ Administration: Update Menu</th></tr>
<%
for (int i=0; i < faqs.length; i++) {
faq = faqs[i];
%>
<% System.out.println(faq.getID()); %>
<% System.out.println(faq.getQuestion()); %>
<tr>
<td><input type="radio" name="id" value="<jsp:getProperty name="faq"
property="ID"/>">
<jsp:getProperty name="faq" property="ID"/></td>
<td><jsp:getProperty name="faq" property="question"/></td>
</tr>
<% } %>
<tr><td colspan=2 align="center">
<input type="submit" value="Abort Updating">
<input type="submit" value="Update Selected FAQ"
onClick="document.menu.cmd.value='update'">
</td></tr>
</table>
</td></tr></table>
<input type="hidden" name="cmd" value="abort">
</form>
</html>
package com.taglib.wdjsp.faqtool;
import java.util.Date;
public class FaqBean {
private int id;
private String question;
private String answer;
private Date lastModified;
public FaqBean() {
this.id = 0;
this.question = "";
this.answer = "";
this.lastModified = new Date();
}
public void setQuestion(String question) {
this.question = question;
this.lastModified = new Date();
}
public String getQuestion() {
return this.question;
}
public void setAnswer(String answer) {
this.answer = answer;
this.lastModified = new Date();
}
public String getAnswer() {
return this.answer;
}
public void setID(int id) {
this.id = id;
}
public int getID() {
return this.id;
}
public Date getLastModified() {
return this.lastModified;
}
public void setLastModified(Date modified) {
this.lastModified = modified;
}
public String toString() {
return "[" + id + "] " + "Q: " + question + "; A: " +
answer + "\n";
}
}
Re: please advise me here
Posted by Ying Sun <Yi...@Cylogix.com>.
thank you very much.
I tried to change getID to getId,setID to setId and also the change ID to id in jsp
file,it still act same.But if I change <jsp:getProperty name="faq" property="id"> to
<%= faq.getId() %>.It work.
so I wonder where's the problem.
Anne-Marie Ternes wrote:
> Hi,
>
> try changing "ID" to "Id". The thing is that following JavaBeans specification,
> only the first letter of the variable has to be capitalized.
> For example:
> If your bean has a variable "question", the setter method will be "setQuestion",
> the getter method will be "getQuestion", i.e. the first letter of your variable
> "question" is turned into a capital letter
>
> So, following the same rules, if your variable is "id", the set and get methods
> must be "setId" and "getId".
>
> HTH
>
> Anne-Marie
>
> Ying Sun wrote:
>
> > Hi all,
> > I happened to a strange problems.
> > The command prompt window display every bean id and question as expected from
> > database.
> > but the <jsp:getProperty name="faq" property="ID">
> > <jsp:getProperty name="faq" property="question"> doesn't work,
> > it suppose look like
> > id question
> > 1 what's this
> > 2 what's that
> >
> > but now it look like
> > id
> > 0
> > 0
> >
> > and also the bean property is id,why we need to put ID in <jsp:getProperty
> > name="faq" property="ID"> .
> >
> > thank you all in advance
> >
> > <%@ page import="com.taglib.wdjsp.faqtool.*"
> > errorPage="error.jsp" %>
> > <jsp:useBean id="faq" class="com.taglib.wdjsp.faqtool.FaqBean"/>
> > <%
> > FaqBean[] faqs = (FaqBean[])request.getAttribute("faqs");
> > %>
> > <html>
> > <head><title>Update Menu</title></head>
> > <form name="menu" action="/webdev/servlet/FaqAdminServlet" method="post">
> > <table border="1" align="center"><tr><td>
> > <table bgcolor="tan" border="1" align="center" cellpadding="10"
> > cellspacing="0">
> > <tr><th colspan="2">FAQ Administration: Update Menu</th></tr>
> > <%
> > for (int i=0; i < faqs.length; i++) {
> > faq = faqs[i];
> > %>
> > <% System.out.println(faq.getID()); %>
> > <% System.out.println(faq.getQuestion()); %>
> > <tr>
> > <td><input type="radio" name="id" value="<jsp:getProperty name="faq"
> > property="ID"/>">
> > <jsp:getProperty name="faq" property="ID"/></td>
> > <td><jsp:getProperty name="faq" property="question"/></td>
> > </tr>
> > <% } %>
> > <tr><td colspan=2 align="center">
> > <input type="submit" value="Abort Updating">
> > <input type="submit" value="Update Selected FAQ"
> > onClick="document.menu.cmd.value='update'">
> > </td></tr>
> > </table>
> > </td></tr></table>
> > <input type="hidden" name="cmd" value="abort">
> > </form>
> > </html>
> >
> > package com.taglib.wdjsp.faqtool;
> >
> > import java.util.Date;
> >
> > public class FaqBean {
> > private int id;
> > private String question;
> > private String answer;
> > private Date lastModified;
> >
> > public FaqBean() {
> > this.id = 0;
> > this.question = "";
> > this.answer = "";
> > this.lastModified = new Date();
> > }
> >
> > public void setQuestion(String question) {
> > this.question = question;
> > this.lastModified = new Date();
> > }
> >
> > public String getQuestion() {
> > return this.question;
> > }
> >
> > public void setAnswer(String answer) {
> > this.answer = answer;
> > this.lastModified = new Date();
> > }
> >
> > public String getAnswer() {
> > return this.answer;
> > }
> >
> > public void setID(int id) {
> > this.id = id;
> > }
> >
> > public int getID() {
> > return this.id;
> > }
> >
> > public Date getLastModified() {
> > return this.lastModified;
> > }
> >
> > public void setLastModified(Date modified) {
> > this.lastModified = modified;
> > }
> >
> > public String toString() {
> > return "[" + id + "] " + "Q: " + question + "; A: " +
> > answer + "\n";
> > }
> > }
>
> --
> =====================================
> Anne-Marie Ternes
>
> Informaticien diplômé
>
> Centre Informatique de l'Etat
> B.P. 1111
> L-1011 Luxembourg
>
> Tél: 49 925 642
> E-Mail: anne-marie.ternes@cie.etat.lu
> =====================================
Re: please advise me here
Posted by Anne-Marie Ternes <An...@cie.etat.lu>.
Hi,
try changing "ID" to "Id". The thing is that following JavaBeans specification,
only the first letter of the variable has to be capitalized.
For example:
If your bean has a variable "question", the setter method will be "setQuestion",
the getter method will be "getQuestion", i.e. the first letter of your variable
"question" is turned into a capital letter
So, following the same rules, if your variable is "id", the set and get methods
must be "setId" and "getId".
HTH
Anne-Marie
Ying Sun wrote:
> Hi all,
> I happened to a strange problems.
> The command prompt window display every bean id and question as expected from
> database.
> but the <jsp:getProperty name="faq" property="ID">
> <jsp:getProperty name="faq" property="question"> doesn't work,
> it suppose look like
> id question
> 1 what's this
> 2 what's that
>
> but now it look like
> id
> 0
> 0
>
> and also the bean property is id,why we need to put ID in <jsp:getProperty
> name="faq" property="ID"> .
>
> thank you all in advance
>
> <%@ page import="com.taglib.wdjsp.faqtool.*"
> errorPage="error.jsp" %>
> <jsp:useBean id="faq" class="com.taglib.wdjsp.faqtool.FaqBean"/>
> <%
> FaqBean[] faqs = (FaqBean[])request.getAttribute("faqs");
> %>
> <html>
> <head><title>Update Menu</title></head>
> <form name="menu" action="/webdev/servlet/FaqAdminServlet" method="post">
> <table border="1" align="center"><tr><td>
> <table bgcolor="tan" border="1" align="center" cellpadding="10"
> cellspacing="0">
> <tr><th colspan="2">FAQ Administration: Update Menu</th></tr>
> <%
> for (int i=0; i < faqs.length; i++) {
> faq = faqs[i];
> %>
> <% System.out.println(faq.getID()); %>
> <% System.out.println(faq.getQuestion()); %>
> <tr>
> <td><input type="radio" name="id" value="<jsp:getProperty name="faq"
> property="ID"/>">
> <jsp:getProperty name="faq" property="ID"/></td>
> <td><jsp:getProperty name="faq" property="question"/></td>
> </tr>
> <% } %>
> <tr><td colspan=2 align="center">
> <input type="submit" value="Abort Updating">
> <input type="submit" value="Update Selected FAQ"
> onClick="document.menu.cmd.value='update'">
> </td></tr>
> </table>
> </td></tr></table>
> <input type="hidden" name="cmd" value="abort">
> </form>
> </html>
>
> package com.taglib.wdjsp.faqtool;
>
> import java.util.Date;
>
> public class FaqBean {
> private int id;
> private String question;
> private String answer;
> private Date lastModified;
>
> public FaqBean() {
> this.id = 0;
> this.question = "";
> this.answer = "";
> this.lastModified = new Date();
> }
>
> public void setQuestion(String question) {
> this.question = question;
> this.lastModified = new Date();
> }
>
> public String getQuestion() {
> return this.question;
> }
>
> public void setAnswer(String answer) {
> this.answer = answer;
> this.lastModified = new Date();
> }
>
> public String getAnswer() {
> return this.answer;
> }
>
> public void setID(int id) {
> this.id = id;
> }
>
> public int getID() {
> return this.id;
> }
>
> public Date getLastModified() {
> return this.lastModified;
> }
>
> public void setLastModified(Date modified) {
> this.lastModified = modified;
> }
>
> public String toString() {
> return "[" + id + "] " + "Q: " + question + "; A: " +
> answer + "\n";
> }
> }
--
=====================================
Anne-Marie Ternes
Informaticien diplômé
Centre Informatique de l'Etat
B.P. 1111
L-1011 Luxembourg
Tél: 49 925 642
E-Mail: anne-marie.ternes@cie.etat.lu
=====================================