Pass Form Value to Bean : Form Input Data « JSP « Java Tutorial






Jsp code

<html>
<!--
 Licensed to the Apache Software Foundation (ASF) under one or more
  contributor license agreements.  See the NOTICE file distributed with
  this work for additional information regarding copyright ownership.
  The ASF licenses this file to You 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="beans.MyBean" />
<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> 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)

  <% } %>

<% } %>

Total attempts so far: <%= cb.getAttempts() %>



<form method=POST action=index.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>

MyBean.java

/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 beans;

import java.beans.*;
import javax.servlet.http.*;
import javax.servlet.*;
import java.text.DateFormat;
import java.util.*;

public class MyBean {

    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;
  }
}
  Download:  JSPPassFormValueToBean.zip( 94 k)








23.25.Form Input Data
23.25.1.Use Loop to Read Form Controls
23.25.2.Use For Each to Loop Through all Values Passed in by Form
23.25.3.Read Hidden Control in Same File
23.25.4.Pass Form Value to Bean
23.25.5.Form with Error Checking