I have started learning servlet programming. I am using eclipse IDE. I have created a simple dynamic web project and have one html file and one servlet program in it(LoginForm.html & LoginServlet.java). I want to display the html page to the user at first .I have also set up the welcome-file-list tag in the web.xml but when I run the project it doesn't display that page. I also tried to enter the url in the browser manually but it's also not working.It is giving the error as '404-Page not found'. My web.xml file is
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>LoginApp</display-name>
<welcome-file-list>
<welcome-file>LoginForm.html</welcome-file>
</welcome-file-list>
<servlet>
<description></description>
<display-name>LoginServlet</display-name>
<servlet-name>LoginServlet</servlet-name>
<servlet-class>com.myprograms.servlet.LoginServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>LoginServlet</servlet-name>
<url-pattern>/logapp</url-pattern>
</servlet-mapping>
</web-app>
The URL I am using is http://localhost:8001/LoginApp/LoginForm.html. Please suggest any solution.
Related
My dispatcher servlet is as follows
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">
<mvc:annotation-driven/>
<context:component-scan base-package="com.springimplant.mvc.controllers"/>
</beans>
I have a home controller under the namespace Home controller as follows
package com.springimplant.mvc.controllers;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
#Controller
public class HomeController {
#RequestMapping("/home")
#ResponseBody
public String goHome()
{
return "Welcome Home";
}
}
Web.xml file is
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1">
<display-name>course-project</display-name>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListner</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/applicationContext.xml</param-value>
</context-param>
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/*-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
Still when I run the application in localhost I am getting a 404 error as
"The origin server did not find a current representation for the target resource or is not willing to disclose that one exists."
Kindly Guide where I am going wrong
The url I am hitting is
http://localhost:8080/course-project/home
Please remove #ResponseBody, as dispatcher servlet should understand that the returning value is not a HTTP Response rather it is a view name. And also please make sure that the returning value should be same as your view page name.
Actually I was trying to post that string as ResponseBody only.
Here is what worked for me I started with a fresh project with following changes
Downloaded STS(Spring Tool Suite) again(my console debugging log was not showing up).
Used Tomcat 8.5 instead of pivotal TC server 4.0 you can try pivotal TC 3.2-3.5 which is based on same.
Dynamic Web Module Facet I was using 4.0 I degraded it to 3.1.(I saw somewhere that 4.0 supports #RestController annotation rather than #Controller annotation)
I was using slf4j-log4j13 facet and log4j implementation this was giving an error sth like class not found "log.logger".So I added another facet "log4j-simple".
Though I still have clue what out of these worked for me :)
Thanks for your responses.
Here it is on github
https://github.com/gauravmatta/springmvc/tree/master/my-project
This is not a theory. I have proof. I've been on this problem for almost a day. My jsp seem to can't read/find CSS. I've done a lot of solutions but nothing work. Until I decide maybe one of my files is causing it. Then I do trial and error. Deleting file to see which one causes it.
Until i'm in web.xml. I deleted web.xml, run the JSP and boom it read the CSS. I copy back the web.xml and then again my css can't be read.
By the way i'm using spring mvc, and my project is maven web application.
below are my codes:
jsp(css link part):
<link rel="stylesheet" type="text/css" href="../../css/logincss.css">
web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
<servlet>
<servlet-name>DpServlet</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>DpServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
I think the error is that when i'm requesting a css file, the request goes to dispatcherservlet so that is so error. How can I fix my problem? Please I need solution i've been on this problem for over a DAY! Thanks in advance.
I am working on a project and hit a brick wall. I couldn't find any resources or bug reports to solve this issue. I have a maven project setup as maven-archetype-webapp. I am new to JEE and it took me sometime to get this far but I have a better understanding of how some of this works. I have hit a brick wall and don't know how to solve the problem below.
I get the following warnings within the web.xml file
servlet-class references to non-existent class "servlets.RegisterServlet"
servlet-class references to non-existent class "servlets.HomePageServlet"
file name references to "index" that does not exist in web content
I get the following error in WildFly 10.x.
Caused by: java.lang.ClassNotFoundException: servlets.RegisterServlet from [Module "deployment.PracticeProject.war:main" from Service Module Loader]
at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:198)
at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:363)
at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:351)
at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:93)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService.createServletConfig(UndertowDeploymentInfoService.java:723)
... 6 more
The java classes appear in the directory structure of the war so its packaging it correctly. For the entities, session beans and servlets I have a scope of provided for the dependencies of the pom.xml file.
My directory structure is as follows:
My web.xml file:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
id="WebApp_ID" version="3.1">
<display-name>PracticeProject</display-name>
<servlet>
<servlet-name>RegisterServlet</servlet-name>
<servlet-class>servlets.RegisterServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>RegisterServlet</servlet-name>
<url-pattern>/register</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>HomePageServlet</servlet-name>
<servlet-class>servlets.HomePageServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>HomePageServlet</servlet-name>
<url-pattern></url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index</welcome-file>
</welcome-file-list>
</web-app>
edit:
CHKJ3013E: The URL Mapping "" is invalid. web.xml /PracticeProject/src/main/webapp/WEB-INF org.eclipse.jst.j2ee.webapplication.internal.impl.ServletMappingImpl#53667dce (urlPattern: , name: null) Validation Message
This question already has answers here:
Change default homepage in root path to servlet with doGet
(2 answers)
Closed 7 years ago.
I have a dynamic web project with a servlet (structure below).
When right-clicking HomeServlet.java --> Run as --> Run on Server --> Tomcat...
It runs fine with the URL: http://localhost:8080/JSTLTest/HomeServlet
When right-clicking JSTLTest --> Run as --> Run on Server --> Tomcat...
I get an error and this URL is used: http://localhost:8080/JSTLTest/
The problem is, i want to deploy it on a server like AWS elastic beanstalk and i guess it doesn't work because he won't use the servlet to start, like:
http://default-environment-9a5exxxd3z.elasticbeanstalk.com/HomeServlet
Is my web.xml wrong?
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<display-name>JSTLTest</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>Home</servlet-name>
<servlet-class>com.journaldev.servlet.HomeServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Home</servlet-name>
<url-pattern>/HomeServlet</url-pattern>
</servlet-mapping>
</web-app>
Structure:
Replace
<url-pattern>/HomeServlet</url-pattern>
with
<url-pattern></url-pattern>
The url pattern is the url that added to the the protocol + server + port + context (something like http://localhost:8080/myapp) can be used to access to a particular servlet.
Note the pattern must be empty. The pattern / is the default pattern. So it match all possible patterns (also what you don't like).
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<servlet>
<description>This is the description of my J2EE component</description>
<display-name>This is the display name of my J2EE component</display-name>
<servlet-name>MyController</servlet-name>
<servlet-class>com.pk.MyController</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>MyController</servlet-name>
<url-pattern>/MyController</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
I have this configuration, but unable to access hzhfyp.com/MyController (PAGE NOT FOUND)
The Path for MyController servelet is WEB-INF/classes/com/pk/MyController.class
Although index.jsp is loaded accuratelty. Demo here http://hzhfyp.com/ Clicking any button will generate js error visible in Firebug(firefox) as Page not Found.
URLs are case sensitive. You've mapped it on /MyController with M, but your jQuery code is calling it by /myController with m. Fix it accordingly.
As to the servlet returing a 404 in spite of the correct URL, this can happen when the servlet failed to initialize or when you didn't deploy the correct web.xml at all. Read the server startup logs for any errors during servlet initialization and verify if you're deploying with the right web.xml.