I just now downloaded tomcat. I learned java the last week and now am planing for servlets. I have a php background. To run my servlet I
1. Created my WEB-INF at
Code:
<DIR>/apache-tomcat-7.0.32/webapps/ROOT/WEB-INF
2. Put my simple web.xml inside WEB-INF with only
3. Then wrote my HttpServlet.java and tried to compile it.
Code:
// Import required java libraries
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
// Extend HttpServlet class
public class HelloWorld extends HttpServlet {
private String message;
public void init() throws ServletException
{
// Do required initialization
message = "Hello World";
}
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException
{
// Set response content type
response.setContentType("text/html");
// Actual logic goes here.
PrintWriter out = response.getWriter();
out.println("<h1>" + message + "</h1>");
}
public void destroy()
{
// do nothing.
}
}
I am getting error message as
Code:
meow@vikkyhacks ~/Arena/apache-tomcat-7.0.32/webapps/ROOT $ javac HelloWorld.java
HelloWorld.java:3: error: package javax.servlet does not exist
import javax.servlet.*;
^
HelloWorld.java:4: error: package javax.servlet.http does not exist
import javax.servlet.http.*;
^
HelloWorld.java:7: error: cannot find symbol
public class HelloWorld extends HttpServlet {
^
symbol: class HttpServlet
HelloWorld.java:11: error: cannot find symbol
public void init() throws ServletException
^
symbol: class ServletException
location: class HelloWorld
HelloWorld.java:17: error: cannot find symbol
public void doGet(HttpServletRequest request,
^
symbol: class HttpServletRequest
location: class HelloWorld
HelloWorld.java:18: error: cannot find symbol
HttpServletResponse response)
^
symbol: class HttpServletResponse
location: class HelloWorld
HelloWorld.java:19: error: cannot find symbol
throws ServletException, IOException
^
symbol: class ServletException[/SIZE]
location: class HelloWorld
7 errors
MY SERVER WORKS FINE COS I PUT AN index.html AS ~/webapps/ROOT/index.html AND AM ABLE TO SEE IT AT localhost:8080.
1. WHY AM I NOT ABLE TO COMPILE MY CODE ?
2. WHAT TO DO NEXT
I am usinghttp://www.tutorialspoint.com/servlets to learn servlets. It will be great if some one can point some useful resources. I feel java environment very much different from php and python
Adv Reply
, ok that was simple, I got that compiled ... but it seems like I have to keep restarting the server for every small change, that is very much irritating, is there any other way around this. I have not tried other servers. I don like keep restarting my server for each and every simple small change.
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