solved: helloword tomcat w3schools
Hi guys- I solved the castiing problem with jakarta. The jakarta is used instead of javax now. I needed to update my pom and then run mvn install -U. The servlet runs correctly on tomcat now. thanks all, jim Sent with Proton Mail secure email. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
additional pom to go with w3schools helloworld question (formatted)
Hi - Here is my formatted pom. thanks http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd; xmlns="http://maven.apache.org/POM/4.0.0; xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance;> 4.0.0 local NewJavaMavenProject NewJavaMavenProject 0.1.0-SNAPSHOT war 3.8.1 17 17 javax.servlet javax.servlet-api 4.0.0 provided exclude-central-repo true central https://repo.maven.apache.org/maven2 true true src/main/java maven-compiler-plugin true org.apache.maven.plugins maven-war-plugin 3.4.0 org.apache.maven.plugins maven-jar-plugin Sent with Proton Mail secure email. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
plaint text version of question: hello world w3schools (tomcat)
Hi-
I am resending my msg. in plain text wondering how to get tomcat to render my
servlet for hellworld from code I got at w3schools.
I am trying to follow the guidelines:
TOMCAT 10.1.10 + plain text email!
THANKS
code and configuration files:
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.Servlet;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
/**
* This servlet program is used to print "Hello World" on
* client browser by implementing servlet interface.
* @author w3spoint
*/
public class HelloWorld implements Servlet {
private static final long serialVersionUID = 1L;
//no-argument constructor.
public HelloWorld() {
}
ServletConfig config=null;
@Override
public void init(ServletConfig config) throws ServletException {
this.config = config;
System.out.println("Do initialization here.");
}
@Override
public void destroy() {
System.out.println("Do clean-up process here.");
}
@Override
public ServletConfig getServletConfig() {
return config;
}
@Override
public String getServletInfo() {
return "w3spoint.com";
}
@Override
public void service(ServletRequest request, ServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("Hello World example using " +
"servlet interface.");
out.close();
}
}
http://java.sun.com/xml/ns/j2ee;
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance;
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd;>
HelloWorld
HelloWorld
HelloWorld
/HelloWorld
url:
http://localhost:8080/examples/HelloWorld
error msg:
Root Cause
java.lang.ClassCastException: class HelloWorld cannot be cast to class
jakarta.servlet.Servlet
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new user trying to get a sample servlet to run from w3school
Hi-
I get the following error msg on tomcat at this URL:
http://localhost:8080/examples/HelloWorld
I am wondering it seems like I am getting the maven project to build in
Moonshine
IDE. then I put a new web.xml file in the examples directory in the tomcat
server
unzipped files. Then, I try to copy my class over and run the example, and I
get this error
msg. listed below.
I just want to try to deploy one or two servlets which I know little about, so
I can switch to blazeds and use tomcat. It's kind of like a helloworld to
tomcat intro.
I am hoping to use apache royale with blazeds.
Any help is greatly appreciated. THANKS. j. mcnamara
Root Cause
java.lang.ClassCastException: class HelloWorld cannot be cast to class
jakarta.servlet.Servlet
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.Servlet;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
/**
* This servlet program is used to print "Hello World" on
* client browser by implementing servlet interface.
* @author w3spoint
*/
public class HelloWorld implements Servlet {
private static final long serialVersionUID = 1L;
//no-argument constructor.
public HelloWorld() {
}
ServletConfig config=null;
@Override
public void init(ServletConfig config) throws ServletException {
this.config = config;
System.out.println("Do initialization here.");
}
@Override
public void destroy() {
System.out.println("Do clean-up process here.");
}
@Override
public ServletConfig getServletConfig() {
return config;
}
@Override
public String getServletInfo() {
return "w3spoint.com";
}
@Override
public void service(ServletRequest request, ServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("Hello World example using " +
"servlet interface.");
out.close();
}}
// the sample code taken from w3schools builds right
the web.xml reads
from conf/server.xml
my pom.xml looks like this:
http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd;
xmlns="http://maven.apache.org/POM/4.0.0;
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance;>
4.0.0
local
NewJavaMavenProject
NewJavaMavenProject
0.1.0-SNAPSHOT
war
3.8.1
17
17
javax.servlet
javax.servlet-api
4.0.0
provided
exclude-central-repo
true
central
https://repo.maven.apache.org/maven2
true
true
src/main/java
maven-compiler-plugin
true
org.apache.maven.plugins
maven-war-plugin
3.4.0
org.apache.maven.plugins
maven-jar-plugin
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