Monday, August 6, 2012

A struts rate list

index.jsp

<%@ page language="java" %>
<%@ taglib uri="/tags/struts-html" prefix="html" %>
   <html>
   <body>
   <html:form action="Lookup">
<table width ="45% " border="0">
 <tr>
       <td>Enter The Symbol:</td>
       <td><html:text property="symbol" /></td>
</tr>
<tr>
 <td colspan="2" align="center"><html:submit /></td>
</tr>
</table>
     </html:form>
  </body>
</html>
quote.jsp

<html>
   <body>
     <table width="500" border="0" cellspacing="0" cellpadding="0">
    <tr>
     <td>
      current Price:<%=request.getAttribute("PRICE")%>
    </td>
  </tr>
 </table>
</body>
</html>

struts-config.xml
<?xml version="1.0" encoding="ISO-8859-1" ?> <!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN" "http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd"> <struts-config> <!-- ======================================== Form Bean Definitions --> <form-beans> <form-bean name="myfrm" type="har.LookupForm" /> </form-beans> <!-- =================================== Action Mapping Definitions --> <action-mappings> <action path="/Lookup" type="har.LookupAction" name="myfrm"> <forward name="success" path="/quote.jsp"/> <forward name="failure" path="/index.jsp"/> </action> </action-mappings> </struts-config>
<?xml version="1.0" encoding="ISO-8859-1"?>
web.xml

<!DOCTYPE web-app
  PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
  "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">

<web-app>
  <display-name>Struts Blank Application</display-name>
  <!-- Standard Action Servlet Configuration (with debugging) -->
  <servlet>
    <servlet-name>action</servlet-name>
    <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
    <init-param>
      <param-name>config</param-name>
      <param-value>/WEB-INF/struts-config.xml</param-value>
    </init-param>
    <init-param>
      <param-name>debug</param-name>
      <param-value>2</param-value>
    </init-param>
    <init-param>
      <param-name>detail</param-name>
      <param-value>2</param-value>
    </init-param>
    <load-on-startup>2</load-on-startup>
  </servlet>


  <!-- Standard Action Servlet Mapping -->
  <servlet-mapping>
    <servlet-name>action</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>

  <!-- The Usual Welcome File List -->
  <taglib>
    <taglib-uri>/tags/struts-html</taglib-uri>
    <taglib-location>/WEB-INF/struts-html.tld</taglib-location>
  </taglib>
</web-app>

LookupAction.java

package har;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionError;

public class LookupAction extends Action {
protected Double getQuote(String symbol){
if(symbol.equalsIgnoreCase("SUNW")){
return new Double(25.00);
         }
else
{
              return new Double(50.00);
}
}
  public ActionForward execute(ActionMapping mapping,ActionForm form,HttpServletRequest request,HttpServletResponse response)
    throws IOException, ServletException {
         Double price=null;
         String target =new String("success");
  if(form!= null){
    LookupForm lookupForm=(LookupForm)form;
String symbol=lookupForm.getSymbol();
  price=getQuote(symbol);
}
if(price == null){
  target= new String("failure");
}
else
{
  request.setAttribute("PRICE",price);

}
  return (mapping.findForward(target));
    }
}
LookupForm.java
package har;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionError;
public class LookupForm extends ActionForm
{
 private String symbol = null;
 public String getSymbol(){
 return(symbol);
 }
public void setSymbol(String symbol){
  this.symbol = symbol;
}
public void reset(ActionMapping mapping,HttpServletRequest request){
        this.symbol=null;
}
}
Download full source code here

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