Source Code : The Struts Tags

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The Struts Tags

The Struts Tags
/*
Title:       Struts : Essential Skills (Essential Skills)
Authors:     Steven Holzner
Publisher:   McGraw-Hill Osborne Media
ISBN:       0072256591
*/


//ch08_01.jsp
<%@ taglib prefix="ch08" uri="WEB-INF/ch08_02.tld" %>
<HTML>
    <HEAD>
        <TITLE>Inserting Text With Custom Tags</TITLE>
    </HEAD>
    <BODY>
        <H1>Inserting Text With Custom Tags</H1>
        <ch08:message />
    </BODY>
</HTML>

//ch08_04.jsp

<%@ taglib prefix="ch08" uri="WEB-INF/ch08_05.tld" %>
<HTML>
  <HEAD>
        <TITLE>Handling Custom Tag Attributes</TITLE>
    </HEAD>
    <BODY>
        <H1>Handling Custom Tag Attributes</H1>
        <ch08:message text="This text was set using an attribute."/>
    </BODY>
</HTML>

//ch08_07.jsp
<%@ taglib prefix="ch08" uri="WEB-INF/ch08_08.tld" %>
<HTML>
    <HEAD>
        <TITLE>Creating Iterating Tags</TITLE>
    </HEAD>

    <BODY>
        <H1>Creating Iterating Tags</H1>
        <%
            String[] toppings = new String[]{ "Pepperoni", "Sausage", "Ham", "Olives" };
            pageContext.setAttribute("toppings", toppings);
        %>

        <ch08:iterator>
            Topping: 
        </ch08:iterator>
    </BODY>
</HTML>

//ch08_10.jsp
<%@ taglib prefix="ch08" uri="WEB-INF/ch08_11.tld" %>
<HTML>
    <HEAD>
        <TITLE>Creating Cooperating Tags</TITLE>
    </HEAD>

    <BODY>
        <H1>Creating Cooperating Tags</H1>
        <ch08:createToppings/>
        <ch08:iterator>
            Topping: 
        </ch08:iterator>
    </BODY>
</HTML>

//ch08_13.jsp
<%@ taglib prefix="ch08" uri="WEB-INF/ch08_15.tld" %>
<HTML>
    <HEAD>
        <TITLE>Custom Tags and Variables</TITLE>
    </HEAD>

    <BODY>
        <H1>Custom Tags and Variables</H1>
        <ch08:createToppings/>
        <%
            for(int loopIndex = 0; loopIndex < toppings.length; loopIndex++) {
                out.println("Topping: " + toppings[loopIndex] + "<BR>");
            }
        %>
    </BODY>
</HTML>

package ch08;

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

public class ch08_03 extends TagSupport 
{

  public int doEndTag() throws JspException 
{
    try {
      pageContext.getOut().print("This text is from the custom tag.");
    } catch (Exception e) {
      throw new JspException(e.toString());
    } 
    return EVAL_PAGE;
  } 
}



package ch08;

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

public class ch08_06 extends TagSupport 
{
  String text;

  public void setText(String s) {
    text = s;
  } 

  public int doEndTag() throws JspException 
{
    try {
      pageContext.getOut().print(text);
    } catch (Exception e) {
      throw new JspException(e.toString());
    } 
    return EVAL_PAGE;
  } 
}

package ch08;

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

public class ch08_09 extends TagSupport{
  private int iterationCounter = 0;
  private String[] toppings = null;

  public int doStartTag()
  {
    toppings = (String[]) pageContext.getAttribute("toppings");
    return EVAL_BODY_INCLUDE;
  }

  public int doAfterBody() throws JspException
  {
    try{
      pageContext.getOut().print(" " + toppings[iterationCounter] + "<BR>");
    } catch(Exception e){
      throw new JspException(e.toString());
    }
    iterationCounter++;
    if(iterationCounter >= toppings.length) {
      return SKIP_BODY;
    }
    return EVAL_BODY_AGAIN;
  }
}


package ch08;

import javax.servlet.jsp.tagext.*;

public class ch08_12 extends TagSupport 
{

  public int doStartTag() {
    String[] toppings = new String[] {"Pepperoni", "Sausage", "Ham", "Olives"};
    pageContext.setAttribute("toppings", toppings);

    return SKIP_BODY;
  } 
}

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