Learning JSP by Example: Create a struts-blank.war blank application

1. Create a struts-blank.war blank application. Use the blank application to create a Web page that displays the title and author of a book. The page includes a Submit button. After the user clicks the Submit button, a page should appear indicating that the request is being processed. The example requires two JSP pages and two JavaBeans. Update struts-config.xml file to associate the Web pages with the JavaBeans.

Solution:

The files used in this exercise are:

1. test.jsp
2. searching.jsp
3. BookForm.java
4. BookAction.java


<%@ taglib uri = "/WEB-INF/struts-html.tld" prefix="html" %>
<html>
<head> <title>Struts</title>
</head>
<body>
<html:form action="book.do" ><center>
<b>TITLE:<b> <html:text property ="title" /><p>
<b>AUTHOR:<b> <html:text property ="author" /><br> <p>
<html:submit /></center>
</html:form>
</body>
</html>

Enter the code in Notepad and save the file as test.jsp in %TOMCAT_HOME%/webapps/ struts-test.


<html>
<head><title>Searching</title>
</head>
<body>
<h3><b>Searching.....<b></h3>
</body>
</html>

Enter the code in Notepad and save the file as searching.jsp in %TOMCAT_HOME%/webapps/ struts-test.


package com;
import javax.servlet.http.*;
import org.apache.struts.action.*;

public class BookForm extends ActionForm
{
private String nTitle = null;
private String nAuthor = null;

public String getTitle() { return nTitle; }
public void setTitle(String aTitle) { nTitle = aTitle; }

public String getAuthor() { return nAuthor; }
public void setAuthor(String aAuthor) { nAuthor = aAuthor; }
public void reset(ActionMapping aMapping, HttpServletRequest aRequest)
{
nTitle = null;
nAuthor = null;
}
}

Enter the Java code in Notepad and save the file as BookForm.java. Compile the file from the command prompt and copy the class file in %TOMCAT_HOME%/webapps/struts-test/WEB-INF/classes/com.


package com;
import javax.servlet.*;
import javax.servlet.http.*;
import org.apache.struts.action.*;

public class BookAction extends Action
{
public ActionForward perform(ActionMapping aMapping, ActionForm aForm,HttpServletRequest aRequest, HttpServletResponse aResponse)throws ServletException
{
BookForm f = (BookForm) aForm;
String title = f.getTitle();
String author = f.getAuthor();
return aMapping.findForward("saved");
}
}

Enter the Java code in Notepad and save the file as BookForm.java. Compile the file from the command prompt and copy the class file in %TOMCAT_HOME%/webapps/struts-test/WEB-INF/classes/com.

Enter the Java code in Notepad and save the file as BookAction.java. Compile the file from the command prompt and copy the class file in %TOMCAT_HOME%/webapps/struts-test/WEB-INF/classes/com.


<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE struts-config PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 1.0//EN" "http://jakarta.apache.org/struts/dtds/struts-config_1_0.dtd">
<struts-config>
<!-- Form Bean Definitions -->
<form-beans>
<form-bean name = "bookForm" type = "com.bookForm"/>
</form-beans>
<!-- Global Forward Definitions -->
<global-forwards>
<forward name = "start" path = "/index.jsp"/>
</global-forwards>
<!-- Action Mapping Definitions -->
<action-mappings>
<action path = "/book" type = "com.bookAction" name = "bookForm">
<forward name = "saved" path = "/greeting.jsp"/>
</action>
</action-mappings>
</struts-config>