Open Education – Page 257

May 10

SimpleExample.jsp Page that uses the ExampleTag custom tag. #Programming Code Examples #Java/J2EE/J2ME #Applets and Basic Graphics

By Author-Check- Article-or-Video in FromSitesTree.com


SimpleExample.jsp Page that uses the ExampleTag custom tag.

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<!-- 
Illustration of very simple JSP custom tag. 

Taken from Core Web Programming Java 2 Edition
from Prentice Hall and Sun Microsystems Press,
.
May be freely used or adapted. 
-->
<HTML>
<HEAD>
<%@ taglib uri="cwp-taglib.tld" prefix="cwp" %>
<TITLE><cwp:example /></TITLE>
<LINK REL=STYLESHEET
      HREF="JSP-Styles.css"
      TYPE="text/css">
</HEAD>
<BODY>
<H1><cwp:example /></H1>
<cwp:example />
</BODY>
</HTML>


ExampleTag

package cwp.tags;

import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import java.io.*;

/** Very simple JSP tag that just inserts a string
 *  ("Custom tag example...") into the output.
 *  The actual name of the tag is not defined here;
 *  that is given by the Tag Library Descriptor (TLD)
 *  file that is referenced by the taglib directive
 *  in the JSP file.
 *  <P>
 *  Taken from Core Web Programming Java 2 Edition
 *  from Prentice Hall and Sun Microsystems Press,
 *  .
 *  May be freely used or adapted.
 */

public class ExampleTag extends TagSupport {
  public int doStartTag() {
    try {
      JspWriter out = pageContext.getOut();
      out.print("Custom tag example " +
                "(cwp.tags.ExampleTag)");
    } catch(IOException ioe) {
      System.out.println("Error in ExampleTag: " + ioe);
    }
    return(SKIP_BODY);
  }
}

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10274
Categories:Programming Code Examples, Java/J2EE/J2ME, Applets and Basic Graphics
Tags:Java/J2EE/J2MEApplets and Basic Graphics
Post Data:2017-01-02 16:04:28

Shop Online: https://www.ShopForSoul.com/
(Big Data, Cloud, Security, Machine Learning): Courses: http://Training.SitesTree.com
In Bengali: http://Bangla.SaLearningSchool.com
http://SitesTree.com
8112223 Canada Inc./JustEtc: http://JustEtc.net (Software/Web/Mobile/Big-Data/Machine Learning)
Shop Online: https://www.ShopForSoul.com/
Medium: https://medium.com/@SayedAhmedCanada

May 10

cwp-taglib.tld Tag Library Descriptor file used by the custom tags in this chapter. #Programming Code Examples #Java/J2EE/J2ME #Applets and Basic Graphics

By Author-Check- Article-or-Video in FromSitesTree.com

cwp-taglib.tld Tag Library Descriptor file used by the custom tags in this chapter.

<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE taglib
 PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.1//EN"
 "http://java.sun.com/j2ee/dtds/web-jsptaglibrary_1_1.dtd">

<!-- a tag library descriptor -->

<taglib>
  <!-- after this the default space is
        "http://java.sun.com/j2ee/dtds/jsptaglibrary_1_2.dtd"
   -->

  <tlibversion>1.0</tlibversion>
  <jspversion>1.1</jspversion>
  <shortname>cwp</shortname>
  <!-- ** CHANGED FROM "urn" TO "uri" IN TOMCAT 3.1 final ** -->
  <uri></uri>
  <info>
    A tag library from Core Web Programming Java 2 Edition,
    .
  </info>

<!--
  <tag>
    The name (after prefix) tag will have in JSP code
    <name>example</name>

    The actual class implementing tag. In
    Tomcat 3.1, it MUST be in a package.
    <tagclass>cwp.tags.ExampleTag</tagclass>

    Descriptive information about tag.
    <info>Simplest example: inserts one line of output</info>

    One of three values describing what goes between
    start and end tag. 
      empty: no body 
      JSP: body that is evaluated by container normally,
           then possibly processed by tag
      tagdependent: body is only processed by tag;
                    JSP in body is not evaluated. 
    ** NOTE: TOMCAT 3.1 FINAL DOES NOT SUPPORT BODYCONTENT **
    ** THE BETA SUPPORTED IT, AND IT IS PART OF SPEC, BUT... **
    <bodycontent>empty</bodycontent>
  </tag>      
-->

  <tag>
    <name>example</name>
    <tagclass>cwp.tags.ExampleTag</tagclass>
    <info>Simplest example: inserts one line of output</info>
    <!-- TOMCAT 3.1 DOES NOT SUPPORT BODYCONTENT 
    <bodycontent>empty</bodycontent> -->
  </tag>      

  <tag>
    <name>simplePrime</name>
    <tagclass>cwp.tags.SimplePrimeTag</tagclass>
    <info>Outputs a random 50-digit prime.</info>
    <!-- TOMCAT 3.1 DOES NOT SUPPORT BODYCONTENT 
    <bodycontent>empty</bodycontent> -->
  </tag>

  <tag>
    <name>prime</name>
    <tagclass>cwp.tags.PrimeTag</tagclass>
    <info>Outputs a random N-digit prime.</info>
    <!-- TOMCAT 3.1 DOES NOT SUPPORT BODYCONTENT
    <bodycontent>empty</bodycontent> -->
    <attribute>
      <name>length</name>
      <required>false</required>
    </attribute>
  </tag>

  <tag>
    <name>heading</name>
    <tagclass>cwp.tags.HeadingTag</tagclass>
    <info>Outputs a 1-cell table used as a heading.</info>
    <!-- TOMCAT 3.1 DOES NOT SUPPORT BODYCONTENT 
    <bodycontent>JSP</bodycontent> -->
    <attribute>
      <name>bgColor</name>
      <required>true</required>  <!-- bgColor is required -->
    </attribute>
    <attribute>
      <name>color</name>
      <required>false</required>
    </attribute>
    <attribute>
      <name>align</name>
      <required>false</required>
    </attribute>
    <attribute>
      <name>fontSize</name>
      <required>false</required>
    </attribute>
    <attribute>
      <name>fontList</name>
      <required>false</required>
    </attribute>
    <attribute>
      <name>border</name>
      <required>false</required>
    </attribute>
    <attribute>
      <name>width</name>
      <required>false</required>
    </attribute>
  </tag>

  <tag>
    <name>debug</name>
    <tagclass>cwp.tags.DebugTag</tagclass>
    <info>Includes body only if debug param is set.</info>
    <!-- TOMCAT 3.1 DOES NOT SUPPORT BODYCONTENT 
    <bodycontent>JSP</bodycontent> -->
  </tag>

  <tag>
    <name>filter</name>
    <tagclass>cwp.tags.FilterTag</tagclass>
    <info>Replaces HTML-specific characters in body.</info>
    <!-- TOMCAT 3.1 DOES NOT SUPPORT BODYCONTENT 
    <bodycontent>JSP</bodycontent> -->
  </tag>

  <tag>
    <name>repeat</name>
    <tagclass>cwp.tags.RepeatTag</tagclass>
    <info>Repeats body the specified number of times.</info>
    <!-- TOMCAT 3.1 DOES NOT SUPPORT BODYCONTENT 
    <bodycontent>JSP</bodycontent> -->
    <attribute>
      <name>reps</name>
      <required>true</required>
      <!-- rtexprvalue indicates whether attribute
           can be a JSP expression. -->
      <rtexprvalue>true</rtexprvalue>
    </attribute>
  </tag>

  <tag>
    <name>if</name>
    <tagclass>cwp.tags.IfTag</tagclass>
    <info>if/condition/then/else tag.</info>
    <!-- TOMCAT 3.1 DOES NOT SUPPORT BODYCONTENT 
    <bodycontent>JSP</bodycontent> -->
  </tag>

  <tag>
    <name>condition</name>
    <tagclass>cwp.tags.IfConditionTag</tagclass>
    <info>condition part of if/condition/then/else tag.</info>
    <!-- TOMCAT 3.1 DOES NOT SUPPORT BODYCONTENT 
    <bodycontent>JSP</bodycontent> -->
  </tag>

  <tag>
    <name>then</name>
    <tagclass>cwp.tags.IfThenTag</tagclass>
    <info>then part of if/condition/then/else tag.</info>
    <!-- TOMCAT 3.1 DOES NOT SUPPORT BODYCONTENT 
    <bodycontent>JSP</bodycontent> -->
  </tag>

  <tag>
    <name>else</name>
    <tagclass>cwp.tags.IfElseTag</tagclass>
    <info>else part of if/condition/then/else tag.</info>
    <!-- TOMCAT 3.1 DOES NOT SUPPORT BODYCONTENT 
    <bodycontent>JSP</bodycontent> -->
  </tag>

</taglib>

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10273
Categories:Programming Code Examples, Java/J2EE/J2ME, Applets and Basic Graphics
Tags:Java/J2EE/J2MEApplets and Basic Graphics
Post Data:2017-01-02 16:04:28

May 10

ExampleTag.java Very simple custom tag. Remember to install it in the WEB-INF/classes/cwp/tags directory. #Programming Code Examples #Java/J2EE/J2ME #Applets and Basic Graphics

By Author-Check- Article-or-Video in FromSitesTree.com

ExampleTag.java Very simple custom tag. Remember to install it in the WEB-INF/classes/cwp/tags directory. 


package cwp.tags;

import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import java.io.*;

/** Very simple JSP tag that just inserts a string
 *  ("Custom tag example...") into the output.
 *  The actual name of the tag is not defined here;
 *  that is given by the Tag Library Descriptor (TLD)
 *  file that is referenced by the taglib directive
 *  in the JSP file.
 *  <P>
 *  Taken from Core Web Programming Java 2 Edition
 *  from Prentice Hall and Sun Microsystems Press,
 *  .
 *  May be freely used or adapted.
 */

public class ExampleTag extends TagSupport {
  public int doStartTag() {
    try {
      JspWriter out = pageContext.getOut();
      out.print("Custom tag example " +
                "(cwp.tags.ExampleTag)");
    } catch(IOException ioe) {
      System.out.println("Error in ExampleTag: " + ioe);
    }
    return(SKIP_BODY);
  }
}

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10272
Categories:Programming Code Examples, Java/J2EE/J2ME, Applets and Basic Graphics
Tags:Java/J2EE/J2MEApplets and Basic Graphics
Post Data:2017-01-02 16:04:28

May 10

SharedCounts1.jsp, SharedCounts2.jsp, and SharedCounts3.jsp Three pages that all use the AccessCountBean. Results you get depend on which page is hit first and how many total hits the combined pages receive. #Programming Code Examples #Java/J2EE/J2ME #Applets and Basic Graphics

By Author-Check- Article-or-Video in FromSitesTree.com

SharedCounts1.jsp, SharedCounts2.jsp, and SharedCounts3.jsp Three pages that all use the AccessCountBean. Results you get depend on which page is hit first and how many total hits the combined pages receive.

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<!-- 
Example of sharing beans. 

Taken from Core Web Programming Java 2 Edition
from Prentice Hall and Sun Microsystems Press,
.
May be freely used or adapted.
-->
<HTML>
<HEAD>
<TITLE>Shared Access Counts: Page 1</TITLE>
<LINK REL=STYLESHEET
      HREF="JSP-Styles.css"
      TYPE="text/css">
</HEAD>

<BODY>

<TABLE BORDER=5 ALIGN="CENTER">
  <TR><TH CLASS="TITLE">
      Shared Access Counts: Page 1</TABLE>
<P>
<jsp:useBean id="counter" 
             class="cwp.AccessCountBean"
             scope="application">
  <jsp:setProperty name="counter" 
                   property="firstPage"
                   value="SharedCounts1.jsp" />
</jsp:useBean>

Of SharedCounts1.jsp (this page), 
<A HREF="SharedCounts2.jsp">SharedCounts2.jsp</A>, and
<A HREF="SharedCounts3.jsp">SharedCounts3.jsp</A>, 
<jsp:getProperty name="counter" property="firstPage" />
was the first page accessed.
<P>
Collectively, the three pages have been accessed 
<jsp:getProperty name="counter" property="accessCount" />
times.
             
</BODY>
</HTML>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<!-- 
Example of sharing beans. 
   
Taken from Core Web Programming Java 2 Edition
from Prentice Hall and Sun Microsystems Press,
.
May be freely used or adapted.
-->
<HTML>
<HEAD>
<TITLE>Shared Access Counts: Page 2</TITLE>
<LINK REL=STYLESHEET
      HREF="JSP-Styles.css"
      TYPE="text/css">
</HEAD>

<BODY>
<TABLE BORDER=5 ALIGN="CENTER">
  <TR><TH CLASS="TITLE">
      Shared Access Counts: Page 2</TABLE>
<P>
<jsp:useBean id="counter" 
             class="cwp.AccessCountBean"
             scope="application">
  <jsp:setProperty name="counter" 
                   property="firstPage"
                   value="SharedCounts2.jsp" />
</jsp:useBean>
Of SharedCounts2.jsp (this page), 
<A HREF="SharedCounts1.jsp">SharedCounts1.jsp</A>, and
<A HREF="SharedCounts3.jsp">SharedCounts3.jsp</A>, 
<jsp:getProperty name="counter" property="firstPage" />
was the first page accessed.
<P>
Collectively, the three pages have been accessed 
<jsp:getProperty name="counter" property="accessCount" />
times.      
</BODY>
</HTML>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<!-- 
Example of sharing beans. 

Taken from Core Web Programming Java 2 Edition
from Prentice Hall and Sun Microsystems Press,
.
May be freely used or adapted.
-->
<HTML>
<HEAD>
<TITLE>Shared Access Counts: Page 3</TITLE>
<LINK REL=STYLESHEET
      HREF="JSP-Styles.css"
      TYPE="text/css">
</HEAD>

<BODY>
<TABLE BORDER=5 ALIGN="CENTER">
  <TR><TH CLASS="TITLE">
      Shared Access Counts: Page 3</TABLE>
<P>
<jsp:useBean id="counter" 
             class="cwp.AccessCountBean"
             scope="application">
  <jsp:setProperty name="counter" 
                   property="firstPage"
                   value="SharedCounts3.jsp" />
</jsp:useBean>
Of SharedCounts3.jsp (this page), 
<A HREF="SharedCounts1.jsp">SharedCounts1.jsp</A>, and
<A HREF="SharedCounts2.jsp">SharedCounts2.jsp</A>, 
<jsp:getProperty name="counter" property="firstPage" />
was the first page accessed.
<P>
Collectively, the three pages have been accessed 
<jsp:getProperty name="counter" property="accessCount" />
times.         
</BODY>
</HTML>

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10271
Categories:Programming Code Examples, Java/J2EE/J2ME, Applets and Basic Graphics
Tags:Java/J2EE/J2MEApplets and Basic Graphics
Post Data:2017-01-02 16:04:28

May 10

AccessCountBean.java Bean used to illustrate the difference between running jsp:setProperty for every request vs. only when the object is created #Programming Code Examples #Java/J2EE/J2ME #Applets and Basic Graphics

By Author-Check- Article-or-Video in FromSitesTree.com

AccessCountBean.java Bean used to illustrate the difference between running jsp:setProperty for every request vs. only when the object is created

package cwp;

/** Simple bean to illustrate sharing beans through
 *  use of the scope attribute of jsp:useBean.
 *  <P>
 *  Taken from Core Web Programming Java 2 Edition
 *  from Prentice Hall and Sun Microsystems Press,
 *  .
 *  May be freely used or adapted.
 */

public class AccessCountBean {
  private String firstPage;
  private int accessCount = 1;

  public String getFirstPage() {
    return(firstPage);
  }

  public void setFirstPage(String firstPage) {
    this.firstPage = firstPage;
  }

  public int getAccessCount() {
    return(accessCount++);
  }
}

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10270
Categories:Programming Code Examples, Java/J2EE/J2ME, Applets and Basic Graphics
Tags:Java/J2EE/J2MEApplets and Basic Graphics
Post Data:2017-01-02 16:04:28

May 10

SaleEntry3.jsp Page that uses the SaleEntry bean, using property="*" to read request parameters and assign them to bean properties #Programming Code Examples #Java/J2EE/J2ME #Applets and Basic Graphics

By Author-Check- Article-or-Video in FromSitesTree.com


SaleEntry3.jsp Page that uses the SaleEntry bean, using property="*" to read request parameters and assign them to bean properties


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<!-- 
Example of using jsp:setProperty and a general association
with the input parameters. See SaleEntry1.jsp
and SaleEntry2.jsp for alternatives. 
   
Taken from Core Web Programming Java 2 Edition
from Prentice Hall and Sun Microsystems Press,
.
May be freely used or adapted.
-->
<HTML>
<HEAD>
<TITLE>Using jsp:setProperty</TITLE>
<LINK REL=STYLESHEET
      HREF="JSP-Styles.css"
      TYPE="text/css">
</HEAD>

<BODY>
<TABLE BORDER=5 ALIGN="CENTER">
  <TR><TH CLASS="TITLE">
      Using jsp:setProperty</TABLE>
<jsp:useBean id="entry" class="cwp.SaleEntry" />
<%-- WARNING! Both the JSWDK 1.0.1 and the Java Web Server
              have a bug that makes them fail on automatic
              type conversions to double values.
--%>
<jsp:setProperty name="entry" property="*" />
<BR>
<TABLE ALIGN="CENTER" BORDER=1>
<TR CLASS="COLORED">
  <TH>Item ID<TH>Unit Price<TH>Number Ordered<TH>Total Price
<TR ALIGN="RIGHT">
  <TD><jsp:getProperty name="entry" property="itemID" />
  <TD>$<jsp:getProperty name="entry" property="itemCost" />
  <TD><jsp:getProperty name="entry" property="numItems" />
  <TD>$<jsp:getProperty name="entry" property="totalCost" />
</TABLE>      
</BODY>
</HTML>

SaleEntry.java //SaleEntry Bean
package cwp;

/** Simple bean to illustrate the various forms
 *  of jsp:setProperty.
 *  <P>
 *  Taken from Core Web Programming Java 2 Edition
 *  from Prentice Hall and Sun Microsystems Press,
 *  .
 *  May be freely used or adapted.
 */

public class SaleEntry {
  private String itemID = "unknown";
  private double discountCode = 1.0;
  private int numItems = 0;

  public String getItemID() {
    return(itemID);
  }

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

  public double getDiscountCode() {
    return(discountCode);
  }

  public void setDiscountCode(double discountCode) {
    this.discountCode = discountCode;
  }

  public int getNumItems() {
    return(numItems);
  }

  public void setNumItems(int numItems) {
    this.numItems = numItems;
  }

  // In real life, replace this with database lookup.

  public double getItemCost() {
    double cost;
    if (itemID.equals("a1234")) {
      cost = 12.99*getDiscountCode();
    } else {
      cost = -9999;
    }
    return(roundToPennies(cost));
  }

  private double roundToPennies(double cost) {
    return(Math.floor(cost*100)/100.0);
  }

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

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10269
Categories:Programming Code Examples, Java/J2EE/J2ME, Applets and Basic Graphics
Tags:Java/J2EE/J2MEApplets and Basic Graphics
Post Data:2017-01-02 16:04:28

May 10

SaleEntry2.jsp Page that uses the SaleEntry bean, using the param attribute to read request parameters and assign them to bean properties #Programming Code Examples #Java/J2EE/J2ME #Applets and Basic Graphics

By Author-Check- Article-or-Video in FromSitesTree.com


SaleEntry2.jsp Page that uses the SaleEntry bean, using the param attribute to read request parameters and assign them to bean properties


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<!-- 
Example of using jsp:setProperty and an explicity association
with an input parameter. See SaleEntry1.jsp
and SaleEntry3.jsp for alternatives. 
   
Taken from Core Web Programming Java 2 Edition
from Prentice Hall and Sun Microsystems Press,
.
May be freely used or adapted.
-->
<HTML>
<HEAD>
<TITLE>Using jsp:setProperty</TITLE>
<LINK REL=STYLESHEET
      HREF="JSP-Styles.css"
      TYPE="text/css">
</HEAD>

<BODY>
<TABLE BORDER=5 ALIGN="CENTER">
  <TR><TH CLASS="TITLE">
      Using jsp:setProperty</TABLE>
<jsp:useBean id="entry" class="cwp.SaleEntry" />
<jsp:setProperty 
    name="entry"
    property="itemID"
    param="itemID" />
<jsp:setProperty 
    name="entry"
    property="numItems"
    param="numItems" />
<%-- WARNING! Both the JSWDK 1.0.1 and the Java Web Server
              have a bug that makes them fail on double
              type conversions of the following sort.
--%>
<jsp:setProperty 
    name="entry"
    property="discountCode"
    param="discountCode" />
<BR>
<TABLE ALIGN="CENTER" BORDER=1>
<TR CLASS="COLORED">
  <TH>Item ID<TH>Unit Price<TH>Number Ordered<TH>Total Price
<TR ALIGN="RIGHT">
  <TD><jsp:getProperty name="entry" property="itemID" />
  <TD>$<jsp:getProperty name="entry" property="itemCost" />
  <TD><jsp:getProperty name="entry" property="numItems" />
  <TD>$<jsp:getProperty name="entry" property="totalCost" />
</TABLE>     
</BODY>
</HTML>


SaleEntry.java //SaleEntry Bean

package cwp;

/** Simple bean to illustrate the various forms
 *  of jsp:setProperty.
 *  <P>
 *  Taken from Core Web Programming Java 2 Edition
 *  from Prentice Hall and Sun Microsystems Press,
 *  .
 *  May be freely used or adapted.
 */

public class SaleEntry {
  private String itemID = "unknown";
  private double discountCode = 1.0;
  private int numItems = 0;

  public String getItemID() {
    return(itemID);
  }

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

  public double getDiscountCode() {
    return(discountCode);
  }

  public void setDiscountCode(double discountCode) {
    this.discountCode = discountCode;
  }

  public int getNumItems() {
    return(numItems);
  }

  public void setNumItems(int numItems) {
    this.numItems = numItems;
  }

  // In real life, replace this with database lookup.

  public double getItemCost() {
    double cost;
    if (itemID.equals("a1234")) {
      cost = 12.99*getDiscountCode();
    } else {
      cost = -9999;
    }
    return(roundToPennies(cost));
  }

  private double roundToPennies(double cost) {
    return(Math.floor(cost*100)/100.0);
  }

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

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10268
Categories:Programming Code Examples, Java/J2EE/J2ME, Applets and Basic Graphics
Tags:Java/J2EE/J2MEApplets and Basic Graphics
Post Data:2017-01-02 16:04:28

May 10

SaleEntry1.jsp Page that uses the SaleEntry bean, using explicit Java code to read request parameters and assign them to bean properties. #Programming Code Examples #Java/J2EE/J2ME #Applets and Basic Graphics

By Author-Check- Article-or-Video in FromSitesTree.com

SaleEntry1.jsp Page that uses the SaleEntry bean, using explicit Java code to read request parameters and assign them to bean properties.


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<!-- 
Example of using jsp:setProperty with an explicit value
supplied to the "value" attribute. See SaleEntry2.jsp
and SaleEntry3.jsp for alternatives. 

Taken from Core Web Programming Java 2 Edition
from Prentice Hall and Sun Microsystems Press,
.
May be freely used or adapted.
-->
<HTML>
<HEAD>
<TITLE>Using jsp:setProperty</TITLE>
<LINK REL=STYLESHEET
      HREF="JSP-Styles.css"
      TYPE="text/css">
</HEAD>

<BODY>
<TABLE BORDER=5 ALIGN="CENTER">
  <TR><TH CLASS="TITLE">
      Using jsp:setProperty</TABLE>
<jsp:useBean id="entry" class="cwp.SaleEntry" />
<jsp:setProperty 
    name="entry" 
    property="itemID"
    value='<%= request.getParameter("itemID") %>' />
<%
int numItemsOrdered = 1;
try {
  numItemsOrdered = 
    Integer.parseInt(request.getParameter("numItems"));
} catch(NumberFormatException nfe) {}
%>
<jsp:setProperty 
    name="entry" 
    property="numItems"
    value="<%= numItemsOrdered %>" />
<% 
double discountCode = 1.0;
try {
  String discountString = 
    request.getParameter("discountCode");
  // Double.parseDouble not available in JDK 1.1.
  discountCode = 
    Double.valueOf(discountString).doubleValue();
} catch(NumberFormatException nfe) {}
%>
<jsp:setProperty 
    name="entry" 
    property="discountCode"
    value="<%= discountCode %>" />
<BR>
<TABLE ALIGN="CENTER" BORDER=1>
<TR CLASS="COLORED">
  <TH>Item ID<TH>Unit Price<TH>Number Ordered<TH>Total Price
<TR ALIGN="RIGHT">
  <TD><jsp:getProperty name="entry" property="itemID" />
  <TD>$<jsp:getProperty name="entry" property="itemCost" />
  <TD><jsp:getProperty name="entry" property="numItems" />
  <TD>$<jsp:getProperty name="entry" property="totalCost" />
</TABLE>       
</BODY>
</HTML>


SaleEntry.Java //sale entry bean

package cwp;

/** Simple bean to illustrate the various forms
 *  of jsp:setProperty.
 *  <P>
 *  Taken from Core Web Programming Java 2 Edition
 *  from Prentice Hall and Sun Microsystems Press,
 *  .
 *  May be freely used or adapted.
 */

public class SaleEntry {
  private String itemID = "unknown";
  private double discountCode = 1.0;
  private int numItems = 0;

  public String getItemID() {
    return(itemID);
  }

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

  public double getDiscountCode() {
    return(discountCode);
  }

  public void setDiscountCode(double discountCode) {
    this.discountCode = discountCode;
  }

  public int getNumItems() {
    return(numItems);
  }

  public void setNumItems(int numItems) {
    this.numItems = numItems;
  }

  // In real life, replace this with database lookup.

  public double getItemCost() {
    double cost;
    if (itemID.equals("a1234")) {
      cost = 12.99*getDiscountCode();
    } else {
      cost = -9999;
    }
    return(roundToPennies(cost));
  }

  private double roundToPennies(double cost) {
    return(Math.floor(cost*100)/100.0);
  }

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

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10267
Categories:Programming Code Examples, Java/J2EE/J2ME, Applets and Basic Graphics
Tags:Java/J2EE/J2MEApplets and Basic Graphics
Post Data:2017-01-02 16:04:28

May 10

SaleEntry.java Bean used to demonstrate the various approaches to reading request parameters and stuffing them into Java objects. #Programming Code Examples #Java/J2EE/J2ME #Applets and Basic Graphics

By Author-Check- Article-or-Video in FromSitesTree.com

package cwp;

/** Simple bean to illustrate the various forms
 *  of jsp:setProperty.
 *  <P>
 *  Taken from Core Web Programming Java 2 Edition
 *  from Prentice Hall and Sun Microsystems Press,
 *  .
 *  May be freely used or adapted.
 */

public class SaleEntry {
  private String itemID = "unknown";
  private double discountCode = 1.0;
  private int numItems = 0;

  public String getItemID() {
    return(itemID);
  }

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

  public double getDiscountCode() {
    return(discountCode);
  }

  public void setDiscountCode(double discountCode) {
    this.discountCode = discountCode;
  }

  public int getNumItems() {
    return(numItems);
  }

  public void setNumItems(int numItems) {
    this.numItems = numItems;
  }

  // In real life, replace this with database lookup.

  public double getItemCost() {
    double cost;
    if (itemID.equals("a1234")) {
      cost = 12.99*getDiscountCode();
    } else {
      cost = -9999;
    }
    return(roundToPennies(cost));
  }

  private double roundToPennies(double cost) {
    return(Math.floor(cost*100)/100.0);
  }

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

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10266
Categories:Programming Code Examples, Java/J2EE/J2ME, Applets and Basic Graphics
Tags:Java/J2EE/J2MEApplets and Basic Graphics
Post Data:2017-01-02 16:04:28

May 10

StringBean.jsp Page that manipulates the StringBean bean with both jsp:useBean (i.e., XML-style) syntax #Programming Code Examples #Java/J2EE/J2ME #Applets and Basic Graphics

By Author-Check- Article-or-Video in FromSitesTree.com

StringBean.jsp Page that manipulates the StringBean bean with both jsp:useBean (i.e., XML-style) syntax


package cwp;

/** Simple bean to illustrate sharing beans through
 *  use of the scope attribute of jsp:useBean.
 *  <P>
 *  Taken from Core Web Programming Java 2 Edition
 *  from Prentice Hall and Sun Microsystems Press,
 *  .
 *  May be freely used or adapted.
 */

public class AccessCountBean {
  private String firstPage;
  private int accessCount = 1;

  public String getFirstPage() {
    return(firstPage);
  }

  public void setFirstPage(String firstPage) {
    this.firstPage = firstPage;
  }

  public int getAccessCount() {
    return(accessCount++);
  }
}

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10265
Categories:Programming Code Examples, Java/J2EE/J2ME, Applets and Basic Graphics
Tags:Java/J2EE/J2MEApplets and Basic Graphics
Post Data:2017-01-02 16:04:28

ABC Learning Design: A Practical Guide to the Arena Blended Connected (ABC) Toolkit

SMTP: Purpose, Installation, Steps, Data Format

Which ETF performed similarly to Bitcoin or closely? What performed the closet?

If I were putting CAD $5,000 into either SPSK or SPRE — which I’d choose, based on risk/reward and probabilities as of Today (Nov 28, 2025)

is SPRE a good purchase today

SimpleExample.jsp Page that uses the ExampleTag custom tag. #Programming Code Examples #Java/J2EE/J2ME #Applets and Basic Graphics

cwp-taglib.tld Tag Library Descriptor file used by the custom tags in this chapter. #Programming Code Examples #Java/J2EE/J2ME #Applets and Basic Graphics

ExampleTag.java Very simple custom tag. Remember to install it in the WEB-INF/classes/cwp/tags directory. #Programming Code Examples #Java/J2EE/J2ME #Applets and Basic Graphics

SharedCounts1.jsp, SharedCounts2.jsp, and SharedCounts3.jsp Three pages that all use the AccessCountBean. Results you get depend on which page is hit first and how many total hits the combined pages receive. #Programming Code Examples #Java/J2EE/J2ME #Applets and Basic Graphics

AccessCountBean.java Bean used to illustrate the difference between running jsp:setProperty for every request vs. only when the object is created #Programming Code Examples #Java/J2EE/J2ME #Applets and Basic Graphics

SaleEntry3.jsp Page that uses the SaleEntry bean, using property="*" to read request parameters and assign them to bean properties #Programming Code Examples #Java/J2EE/J2ME #Applets and Basic Graphics

SaleEntry2.jsp Page that uses the SaleEntry bean, using the param attribute to read request parameters and assign them to bean properties #Programming Code Examples #Java/J2EE/J2ME #Applets and Basic Graphics

SaleEntry1.jsp Page that uses the SaleEntry bean, using explicit Java code to read request parameters and assign them to bean properties. #Programming Code Examples #Java/J2EE/J2ME #Applets and Basic Graphics

SaleEntry.java Bean used to demonstrate the various approaches to reading request parameters and stuffing them into Java objects. #Programming Code Examples #Java/J2EE/J2ME #Applets and Basic Graphics

StringBean.jsp Page that manipulates the StringBean bean with both jsp:useBean (i.e., XML-style) syntax #Programming Code Examples #Java/J2EE/J2ME #Applets and Basic Graphics

Categories

Recent Posts

Topics

Grid

ABC Learning Design: A Practical Guide to the Arena Blended Connected (ABC) Toolkit

SMTP: Purpose, Installation, Steps, Data Format

Which ETF performed similarly to Bitcoin or closely? What performed the closet?

If I were putting CAD $5,000 into either SPSK or SPRE — which I’d choose, based on risk/reward and probabilities as of Today (Nov 28, 2025)

is SPRE a good purchase today

Is SPSK a Good Buy Today? A Clear Guide for Long-Term Investors