{"id":195,"date":"2007-09-06T00:00:00","date_gmt":"2007-09-06T00:00:00","guid":{"rendered":"http:\/\/www.strongd.net\/?p=195"},"modified":"2007-09-06T00:00:00","modified_gmt":"2007-09-06T00:00:00","slug":"Logic greaterEqual Tag (... <\/logic:greaterThan>) ","status":"publish","type":"post","link":"https:\/\/www.strongd.net\/?p=195","title":{"rendered":"Logic greaterEqual Tag (… <\/logic:greaterThan>)"},"content":{"rendered":"


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empty tag –<\/FONT> if the requested variable is greater than or equal to the specified value then this tag is used to evaluate the contents contained in the nested body parts of this tag.<\/I><\/FONT><\/H3>
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This tag compares the variable against the specified constant value. If the variable is greater than or equal<\/STRONG> to the specified value then the nested body contents of this tag is evaluated<\/FONT><\/P>
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Attributes of greaterEqual Tag<\/B><\/FONT><\/P><\/DIV>
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Attribute Name<\/FONT><\/TH>
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cookie<\/B><\/FONT><\/TD>
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The variable contains  the cookie value needed to compare .Here the name is specified by this attribute.<\/FONT><\/P><\/TD><\/TR>
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header<\/B><\/FONT><\/TD>
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The variable contains the header value needed to compare whose name is specified by this attribute. The name match is performed in a case insensitive manner.<\/FONT><\/P><\/TD><\/TR>
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name<\/B><\/FONT><\/TD>
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The variable to be compared is the JSP bean specified by this attribute, if property<\/CODE> is not specified, or the value of the specified property of this bean, if property<\/CODE> is specified.<\/FONT><\/P><\/TD><\/TR>
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parameter<\/B><\/FONT><\/TD>
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The variable to be compared is the first, or only, value of the request parameter specified by this attribute.<\/FONT><\/P><\/TD><\/TR>
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property<\/B><\/FONT><\/TD>
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The variable contains  the bean property value needed to compare ,it is specified by this attribute. The property reference can be simple, nested, and\/or indexed.<\/FONT><\/P><\/TD><\/TR>
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scope<\/B><\/FONT><\/TD>
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This specifies the bean scope within which  the bean is searched  by the name<\/CODE> property, or “any scope” if not specified.<\/FONT><\/P><\/TD><\/TR>
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value<\/B><\/FONT><\/TD>
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The constant value is specified by other attribute(s) of this tag, needed to compare<\/FONT><\/P><\/TD><\/TR><\/TBODY><\/TABLE>
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Logic greaterThan Tag (<logic: greaterThan>…
<\/ logic:greaterThan>) <\/FONT><\/H1>
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greaterThan<\/FONT><\/STRONG> <\/FONT>Tag :<\/FONT> Tag evaluation of the nested body content occurs only if the specified value is greater than the specified value.<\/I><\/FONT><\/H3>
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This tag compares the variable against the specified constant value. If the variable is greater than <\/STRONG> the specified value then the nested body contents of this tag is evaluated<\/FONT><\/P>
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Attributes of greaterThan Tag<\/B><\/FONT><\/P>
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Attribute Name<\/FONT><\/TH>
\n		Description<\/FONT><\/TH><\/TR>
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cookie<\/B><\/FONT><\/TD>
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The variable contains  the cookie value needed to compare .Here the name is specified by this attribute.<\/FONT><\/P><\/TD><\/TR>
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header<\/B><\/FONT><\/TD>
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The variable contains the header value needed to compare whose name is specified by this attribute. The name match is performed in a case insensitive manner.<\/FONT><\/P><\/TD><\/TR>
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name<\/B><\/FONT><\/TD>
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The variable to be compared is the JSP bean specified by this attribute, if property<\/CODE> is not specified, or the value of the specified property of this bean, if property<\/CODE> is specified.<\/FONT><\/P><\/TD><\/TR>
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parameter<\/B><\/FONT><\/TD>
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The variable to be compared is the first, or only, value of the request parameter specified by this attribute.<\/FONT><\/P><\/TD><\/TR>
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property<\/B><\/FONT><\/TD>
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The variable contains  the bean property value needed to compare ,it is specified by this attribute. The property reference can be simple, nested, and\/or indexed.<\/FONT><\/P><\/TD><\/TR>
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scope<\/B><\/FONT><\/TD>
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This specifies the bean scope within which  the bean is searched  by the name<\/CODE> property, or “any scope” if not specified.<\/FONT><\/P><\/TD><\/TR>
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value<\/B><\/FONT><\/TD>
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The constant value is specified by other attribute(s) of this tag, needed to compare<\/FONT><\/P><\/TD><\/TR><\/TBODY><\/TABLE><\/DIV>
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Example Illustrating the use of the <\/FONT>Logic greaterEqual<\/FONT> Tag<logic:greaterEqual> and the <\/FONT>Logic greaterThan<\/FONT> Tag<logic:greaterThan> .<\/FONT><\/H2>
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Here you will learn to use the Struts  Logic tags. We will cover an example that will show  a comparison between  the two logic tags (ie..&lt$$logic:greaterEqual> and the <logic:greaterThan>).<\/FONT><\/P>
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Example code<\/B><\/FONT><\/P>
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Creating an <\/FONT><\/B>Action  Class<\/B><\/FONT><\/P>
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Develop a simple action class <\/FONT>LogicAction.java.<\/FONT><\/CODE><\/P>
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package<\/FONT> <\/FONT><\/B>roseindia.net;

import <\/B>java.io.*;
import <\/B>java.util.*;

\/**<\/FONT><\/CODE>
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* @author Amit Gupta
* @Web http:\/\/www.roseindia.net
* @Email struts@roseindia.net

<\/A>**\/
import <\/B>javax.servlet.http.HttpServletRequest;
import <\/B>javax.servlet.http.HttpServletResponse;
import <\/B>javax.servlet.ServletException;
import <\/B>org.apache.struts.action.*;

public class <\/B>LogicAction extends <\/B>Action 
{
  public <\/B>ActionForward execute(ActionMapping mapping,
    ActionForm form,
    HttpServletRequest request,
    HttpServletResponse response)
    throws <\/B>IOException, ServletException {

      

        return <\/B>mapping.findForward(“success”);
    }
}<\/FONT><\/CODE> <\/P><\/TD><\/TR><\/TBODY><\/TABLE><\/DIV><\/TD><\/TR><\/TBODY><\/TABLE><\/DIV>
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Creating Form Bean<\/FONT><\/B><\/P>
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Our form bean class contains only one property number<\/B>. Here is the code of FormBean <\/FONT>(<\/FONT>Logic<\/FONT><\/CODE>Form<\/CODE>.java)<\/FONT><\/P>
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package <\/B>roseindia.net;

import <\/B>org.apache.struts.action.*;

\/**

* @author Amit Gupta
* @Web http:\/\/www.roseindia.net
* @Email struts@roseindia.net
<\/A>
**\/
<\/FONT><\/CODE>
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import <\/B>javax.servlet.http.HttpServletRequest;
import <\/B>javax.servlet.http.HttpServletResponse;

public class <\/B>LogicForm extends <\/B>ActionForm 
{
    
    private <\/B>long number;        
  public <\/B><\/FONT><\/CODE>long getN<\/FONT><\/CODE>umber() 
    {
        return <\/B>number;
    }
    
    public void <\/B>setNumber(long number) 
    {
    this<\/B>.number=number;
  }
   
    
  
    
}<\/FONT><\/CODE> <\/P><\/TD><\/TR><\/TBODY><\/TABLE><\/DIV><\/TD><\/TR><\/TBODY><\/TABLE><\/DIV>
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Defining form Bean in struts-config.xml file<\/FONT><\/B><\/P>
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Add the following entry in the struts-config.xml file for defining the form bean<\/FONT><\/P>
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<form-bean name=”LogicForm<\/CODE>”  type=”roseindia.net.LogicForm<\/CODE>” \/><\/FONT><\/TD><\/TR><\/TBODY><\/TABLE><\/DIV>
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 Developing the Action Mapping in the struts-config.xml
<\/FONT><\/B>
Here, Action mapping helps to select the method from the Action class for specific requests.<\/FONT><\/P>
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<action path=”\/LogicAction”
type=”roseindia.net.LogicAction”
name=”LogicForm”
scope=”request”
input=”\/pages\/InputLogic.jsp”>
<forward name=”success” path=”\/pages\/output.jsp”\/>
<\/action><\/FONT><\/TD><\/TR><\/TBODY><\/TABLE><\/DIV>
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Developing the<\/FONT> InputLogic.jsp <\/FONT>page<\/FONT><\/P>
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<%@ taglib uri=”\/tags\/struts-html” prefix=”html” %>
<%@ taglib uri=”\/tags\/struts-logic” prefix=”logic” %>

<html:html>
<head>
<title>Using &lt;logic&gt; Tags<\/title>
<\/head>

<body>
<h1>Using &lt;logic&gt; Tags<\/h1>

<html:form action=”\/LogicAction” method =”post”>

<h2>Enter a number:<\/h2>
<html:text property=”number”\/>

<br>
<h3>The &lt;logic:greaterEqual&gt;tag works if you enter a value<\/h3>
<h3>greater than or equal to 1<\/h3>
<h3>The &lt;logic:greaterThan&gt;tag works if you enter a value<\/h3>
<h3>greater than to 10000<\/h3>
<br>

<html:submit value=”Submit”\/>


<html:cancel\/>
<\/html:form>
<\/body>
<\/html:html>
<\/FONT><\/TD><\/TR><\/TBODY><\/TABLE><\/DIV>
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Developing the <\/FONT>output.jsp <\/FONT>page<\/FONT><\/P>
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<%@ taglib uri=”\/tags\/struts-bean” prefix=”bean” %>
<%@ taglib uri=”\/tags\/struts-logic” prefix=”logic” %>

<HTML>
<HEAD>
<TITLE>Here’s Your Data…<\/TITLE>
<\/HEAD>

<BODY>
<H3>Here’s Your Data…<\/H3>

<h4>The number entered is:

<bean:write name=”LogicForm” property=”number”\/><\/h4>


<\/FONT><logic:greaterEqual<\/B> name=”LogicForm” property=”number” value<\/B>=”1<\/B>“>
<h4>Using the tag&lt;logic:greaterEqual&gt;<\/h4> 
Result : greaterEqual
<\/logic:greaterEqual<\/B>>



<logic:greaterThan<\/B> name=”LogicForm” property=”number” value<\/B>=”10000<\/B>“>
<h4>Using the tag &lt;logic:greaterThan &gt; <\/h4> 
Result : greaterThan
<\/logic:greaterThan<\/B>>
<\/FONT>

<\/BODY>
<\/HTML><\/FONT> <\/TD><\/TR><\/TBODY><\/TABLE><\/DIV>
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Add the following line in the <\/FONT>index.jsp<\/FONT> to call the form.<\/FONT><\/P>
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<li>
<html:link page=”\/pages\/InputLogic.jsp”>Struts File Upload<\/html:link>
<br>
Example demonstrates  how LogicAction Class works.
<\/li>
<\/FONT><\/P>
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Building and Testing the Example <\/FONT><\/B><\/P>
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To build and deploy the application go to Struts\\Strutstutorial directory and type ant on the command prompt. This will deploy the application. Open the browser and navigate to the <\/FONT>InputLogic.jsp <\/B>page. Your browser displays the following  page.<\/FONT><\/P>
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Entering a number greater than 1 and less than 10000  to the <\/FONT>InputLogic<\/B>.jsp <\/B>page evaluates the working of the<\/FONT> <logic:greaterEqual> tag<\/FONT><\/P>
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<\/TD><\/TR><\/TBODY><\/TABLE><\/DIV>
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It displays the following out.jsp <\/B>page<\/FONT><\/P>
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<\/TD><\/TR><\/TBODY><\/TABLE><\/DIV>
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Writing a number greater than 10000 to the <\/FONT>InputLogic.jsp <\/FONT>displays<\/FONT><\/P>
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<\/TD><\/TR><\/TBODY><\/TABLE><\/DIV>
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The <\/FONT>output.jsp<\/FONT> displays the working of the both tags.<\/FONT><\/P>
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<\/TD><\/TR><\/TBODY><\/TABLE><\/DIV><\/DIV><\/p>\n","protected":false},"excerpt":{"rendered":"

empty tag – if the requested variable is greater than or equal to the specified value then this tag is used to evaluate the contents contained in the nested body parts of this tag. This tag compares the variable against the specified constant value. If the variable is greater than or equal to the specified value … Continue reading Logic greaterEqual Tag (… <\/logic:greaterThan>)<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-195","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts\/195","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=195"}],"version-history":[{"count":0,"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts\/195\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=195"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=195"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=195"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}