Unable to import

[Ankitt Gupta]

Hi all

I am unable to import the javax.servlet.http.*;
please help

[Vijitha Kumara]

What are you trying to do? Unable to compile a servlet? If so, you need servlet-api.jar in your classpath. Tell us what you are trying to accomplish and how you are doing it. Then we can help easily.

[Ankitt Gupta]

i am doing the beerV1 project from the head first.
i included the class path but it saying the package javax.servlet.http.*; does not exist

[Vijitha Kumara]

When do you get this error? Show us the stack trace. Have you setup the classpath ? If so how? Try "echo %CLASSPATH%" (on Windows) from command prompt and post the output.

[Ankitt Gupta]

Vijitha Kumara wrote:When do you get this error? Show us the stack trace. Have you setup the classpath ? If so how? Try "echo %CLASSPATH%" (on Windows) from command prompt and post the output.

the class path is ok.it is compile time error in which it is unable to find the package

 

 package com.example.web;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;

public class BeerSelect extends HttpServlet {

public void doPost(HttpServletRequest req,HttpServletResponse res) throws IOException,ServletException
	{
	res.setContentType("text/html");
	PrintWriter out= res.getwriter();
	out.println("Beer Selection Advice<br>");
	String c= req.getParameter("color");
	out.println("<br> Got Beer Color" + c);
	}
}

	  

[Ankitt Gupta]

this is the class path
.;C:\Program Files\Java\jre1.6.0_04\lib\ext\QTJava.zip

[Vijitha Kumara]

it is compile time error in which it is unable to find the package

That's because the required jar files (servlet-api.jar in this case) not found in the classpath.

[Vijitha Kumara]

Anky Gupta wrote:this is the class path
.;C:\Program Files\Java\jre1.6.0_04\lib\ext\QTJava.zip

There is the problem. You have to add an entry to refer the servlet API implementation in the classpath which can be found among your container's library files (probably inside "YOURCONTAINERHOME/lib"). BTW, which container you are using?

[Ankitt Gupta]

D:\Prog\MyProject\beerV1>javac -classpath \C:\ProgramFiles\Apache\Tomcat\common\
lib\servlet-api.jar;classes:. -d classes src\com\example\web\BeerSelect.java
src\com\example\web\BeerSelect.java:3: package javax.servlet does not exist
import javax.servlet.*;
^
src\com\example\web\BeerSelect.java:4: package javax.servlet.http does not exist

import javax.servlet.http.*;
^
src\com\example\web\BeerSelect.java:7: cannot find symbol
symbol: class HttpServlet
public class BeerSelect extends HttpServlet {
^
src\com\example\web\BeerSelect.java:9: cannot find symbol
symbol : class HttpServletRequest
location: class com.example.web.BeerSelect
public void doPost(HttpServletRequest req,HttpServletResponse res) throws IOExce
ption,ServletException
^
src\com\example\web\BeerSelect.java:9: cannot find symbol
symbol : class HttpServletResponse
location: class com.example.web.BeerSelect
public void doPost(HttpServletRequest req,HttpServletResponse res) throws IOExce
ption,ServletException
^
src\com\example\web\BeerSelect.java:9: cannot find symbol
symbol : class ServletException
location: class com.example.web.BeerSelect
public void doPost(HttpServletRequest req,HttpServletResponse res) throws IOExce
ption,ServletException

^
6 errors

This the command prompt

[Vijitha Kumara]

Anky, Check my previous reply. You will be fine after adding the servlet API jar file to your classpath

[Ankitt Gupta]

.;C:\Program Files\Java\jre1.6.0_04\lib\ext\QTJava.zip;C:\Program Files\Apache\Tomcat\common\lib


IS this class path okay?

[Vijitha Kumara]

Anky Gupta wrote:.;C:\Program Files\Java\jre1.6.0_04\lib\ext\QTJava.zip;C:\Program Files\Apache\Tomcat\common\lib

IS this class path okay?

Almost. Just make it,

C:\Program Files\Apache\Tomcat\common\lib\servlet-api.jar

[Ankitt Gupta]

.;C:\Program Files\Java\jre1.6.0_04\lib\ext\QTJava.zip;C:\Program Files\Apache\Tomcat\common\lib\servlet-api.jar

I have set this as class path in the Environment Variable but still no avail

[Vijitha Kumara]

Just type,

javac -d classes src\com\example\web\BeerSelect.java

If you got any error post it here.

[Ankitt Gupta]

Yippe finally compiled

Much appreciated Thanks.
Thank you for having patience with me.
you are such a nice person

Cheers

[Vijitha Kumara]

No problem