Java/JSP/Form Beans
Jsp Form And Bean
//File: index.html
<html>
<!--
Copyright 2004 The Apache Software Foundation
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<body bgcolor= white>
<font size=6 color=red>
<hr>
This web page is an example using JSP and BEANs.
<p>
Guess my favorite two colors
<p> If you fail to guess both of them - you get yellow on red.
<p> If you guess one of them right, either your foreground or
your background will change to the color that was guessed right.
<p> Guess them both right and your browser foreground/background
will change to my two favorite colors to display this page.
<hr>
<form method=GET action=colrs.jsp>
Color #1: <input type=text name= color1 size=16>
<br>
Color #2: <input type=text name= color2 size=16>
<p>
<input type=submit name=action value="Submit">
<input type=submit name=action value="Hint">
</form>
</font>
</body>
</html>
///////////////////////////////////////////////////////////
//File: colr.jsp
<html>
<!--
Copyright 2004 The Apache Software Foundation
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<jsp:useBean id="cb" scope="session" class="colors.ColorGameBean" />
<jsp:setProperty name="cb" property="*" />
<%
cb.processRequest(request);
%>
<body bgcolor=<%= cb.getColor1() %>>
<font size=6 color=<%= cb.getColor2() %>>
<p>
<% if (cb.getHint()==true) { %>
<p> Hint #1: Vampires prey at night!
<p> <p> Hint #2: Nancy without the n.
<% } %>
<% if (cb.getSuccess()==true) { %>
<p> CONGRATULATIONS!!
<% if (cb.getHintTaken()==true) { %>
<p> ( although I know you cheated and peeked into the hints)
<% } %>
<% } %>
<p> Total attempts so far: <%= cb.getAttempts() %>
<p>
<p>
<form method=POST action=colrs.jsp>
Color #1: <input type=text name= color1 size=16>
<br>
Color #2: <input type=text name= color2 size=16>
<p>
<input type=submit name=action value="Submit">
<input type=submit name=action value="Hint">
</form>
</font>
</body>
</html>
////////////////////////////////////////////////////////////
//File: ColorGameBean.java
/*
* Copyright 2004 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package colors;
import javax.servlet.http.*;
public class ColorGameBean {
private String background = "yellow";
private String foreground = "red";
private String color1 = foreground;
private String color2 = background;
private String hint = "no";
private int attempts = 0;
private int intval = 0;
private boolean tookHints = false;
public void processRequest(HttpServletRequest request) {
// background = "yellow";
// foreground = "red";
if (! color1.equals(foreground)) {
if (color1.equalsIgnoreCase("black") ||
color1.equalsIgnoreCase("cyan")) {
background = color1;
}
}
if (! color2.equals(background)) {
if (color2.equalsIgnoreCase("black") ||
color2.equalsIgnoreCase("cyan")) {
foreground = color2;
}
}
attempts++;
}
public void setColor2(String x) {
color2 = x;
}
public void setColor1(String x) {
color1 = x;
}
public void setAction(String x) {
if (!tookHints)
tookHints = x.equalsIgnoreCase("Hint");
hint = x;
}
public String getColor2() {
return background;
}
public String getColor1() {
return foreground;
}
public int getAttempts() {
return attempts;
}
public boolean getHint() {
return hint.equalsIgnoreCase("Hint");
}
public boolean getSuccess() {
if (background.equalsIgnoreCase("black") ||
background.equalsIgnoreCase("cyan")) {
if (foreground.equalsIgnoreCase("black") ||
foreground.equalsIgnoreCase("cyan"))
return true;
else
return false;
}
return false;
}
public boolean getHintTaken() {
return tookHints;
}
public void reset() {
foreground = "red";
background = "yellow";
}
public void setIntval(int value) {
intval = value;
}
public int getIntval() {
return intval;
}
}
