Servlet is not displaying the data fetched from an html page
Question
I am new to Web Development in java, and just started with servlets with a project "Welcome Servlet". It has 3 files , 1. ColServlet.java in default package. 2. index.html in WebContent folder. 3. web.xml in WEB-INF folder. ColServlet.java is :
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class ColServlet extends HttpServlet
{
public void doGet(HttpServletRequest request,HttpServletResponse response)
throws ServletException, IOException
{
String colname = request.getParameter("col");
response.setContentType("text/html");
PrintWriter info = response.getWriter();
info.println("The color is: ");
info.println(" <HTML>\n" +
"<HEAD><TITLE>Hello WWW</TITLE></HEAD>\n" +
"<BODY>\n" +
"<H1>Hello WWW</H1>\n" +
"<h1>"+colname+"</h1>"+
"</BODY></HTML>");
info.close();
}
}
index.html file is :
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Select Color</title>
</head>
<body>
<form method="GET" action="/ColServlet">
Select the color:
<select name="col" size="3">
<option value="blue">Blue</option>
<option value="orange">Orange</option>
</select>
<input type="submit" value="Submit">
</form>
</body>
</html>
web.xml file is :
<web-app>
<servlet>
<servlet-name>Servlet1</servlet-name>
<servlet-class>ColServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Servlet1</servlet-name>
<url-pattern>/ColServlet</url-pattern>
</servlet-mapping>
</web-app>
NOW : the problem is whenever i select any color, next page doesn't show the selected one.
1 answers
solution1
0 ACCPTED 2014-03-05 22:31:14
From @SotiriosDelimanolis' comment , you should change the action path in your <form> to also use the context path of the application. You should update this line in your index.html file:
<form method="GET" action="<applicationName>/ColServlet">
Where <applicationName> is the name of your web application, which is usually the name of your web project eg "WelcomeServet" (without quotes).
If you happen to use a JSP file instead (which can be as easy as renaming index.html to index.jsp), then update this line to:
<form method="GET" action="${pageContext.request.contextPath}/ColServlet">
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