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How do I import the javax.servlet / jakarta.servlet API in my Eclipse project?
(16 answers)
Servlet returns "HTTP Status 404 The requested resource (/servlet) is not available"
(19 answers)
Closed 1 year ago.
I'm using Tomcat8 server and i'm getting following error.
It's url is http://localhost:8080/WeatherWebApp When i'm submitting the details then it's giving this error.
Here is WeatherServlet.java class
package org.akshayrahar;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class WeatherServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
WeatherServlet(){
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("again");
response.setContentType("text/html");
PrintWriter out=response.getWriter();
out.println("akshay rahar");
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}
}
Here is web.xml file
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE xml>
<web-app version="2.4" xmlns="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">
<display-name>WeatherWebApp</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>HelloServlet</servlet-name>
<servlet-class>WeatherServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>HelloServlet</servlet-name>
<url-pattern>/CurrentWeather</url-pattern>
</servlet-mapping>
</web-app>
Here is index.html file too:-
<!DOCTYPE html>
<html>
<head>
<title>Weather App</title>
<link rel="stylesheet" type="text/css" href="stylesheet.css">
<script >
function initMap() {
var input =document.getElementById('pac-input');
var autocomplete = new google.maps.places.Autocomplete(input);
}
</script>
<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyACZhmkSaIz436Dt3kHt_cVEYKN-gHzfYo&libraries=places&callback=initMap"async defer></script>
</head>
<body>
<h1>Find weather of any city in the world</h1>
<h2>Enter City Name</h2>
<form id="form" action="CurrentWeather" method="GET">
<input id="pac-input" type="text" name="cityname">
</form><br>
<div class="button1">
<button type="submit" form="form" value="Submit">Submit</button>
</div>
</body>
</html>
I've also mentioned stylesheet.css file in comment. Please check it.
The error shows that Tomcat is unable to create an instance of your WeatherServlet class.
You should make its constructor and other methods public too. You can even make use of the default constructor by removing the less accessible constructor:
public class WeatherServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
public WeatherServlet(){
}
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("again");
response.setContentType("text/html");
PrintWriter out=response.getWriter();
out.println("akshay rahar");
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}
}
Please provide a fully qualified class name on your web.xml. I was facing a similar issue and this is what fixed it.
<servlet>
<servlet-name>HelloServlet</servlet-name>
<servlet-class>org.akshayrahar.WeatherServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>HelloServlet</servlet-name>
<url-pattern>/CurrentWeather</url-pattern>
</servlet-mapping>
Related
I have a simple program which get username and password, if the password is servlet then it will forward to the welcome page, else, it will show a message and includes html login form.
When I enter username and password and click on login, no matter what, it always shows me the "HTTP Status 405 : HTTP method GET is not supported by this URL" error.
I have read a lot of questions and answers here, none of them helped me to solve this problem.
Here's my code:
Simple.java
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.*;
import javax.servlet.http.*;
public class Simple extends HttpServlet {
#Override
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String p=request.getParameter("userPass");
if(p.equals("servlet")){
RequestDispatcher rd=request.getRequestDispatcher("welcome");
rd.forward(request, response);
}
else{
out.print("Sorry username or password error!");
RequestDispatcher rd=request.getRequestDispatcher("index.html");
rd.include(request, response);
}
}
}
WelcomeServlet.java
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class WelcomeServlet extends HttpServlet {
#Override
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String n=request.getParameter("userName");
out.print("Welcome "+n);
}
}
index.html
<form action="go" method="post">
Name:<input type="text" name="userName"/><br/>
Password:<input type="password" name="userPass"/><br/>
<input type="submit" value="login"/>
</form>
web.xml
<?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>
<servlet-name>Simple</servlet-name>
<servlet-class>Simple</servlet-class>
</servlet>
<servlet>
<servlet-name>WelcomeServlet</servlet-name>
<servlet-class>WelcomeServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Simple</servlet-name>
<url-pattern>/go</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>WelcomeServlet</servlet-name>
<url-pattern>/welcome</url-pattern>
</servlet-mapping>
</web-app>
Hi I am receiving the 404 HTTP status while submiting the below jsp.
HTTP Status 404 - /TestServlet1
Could you please help me to resolve this error
Note : The person and the dog class were defined
index.jsp
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<html>
<head>
</head>
<body>
<form id="a" action="/TestServlet1">
<input type="submit">
</form>
<%
%>
Name = '${person.name}'
Dog = '${person.dog.name}'
</body>
</html>
TestServlet1
package test;
import java.io.IOException;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class TestServlet
*/
public class TestServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* #see HttpServlet#HttpServlet()
*/
public TestServlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* #see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
Dog g = new Dog();
g.setName("dogeee");
Person p = new Person();
p.setDog(g);
p.setName("xxx");
request.setAttribute("person", p);
RequestDispatcher dispatch = request.getRequestDispatcher("/index.jsp");
dispatch.forward(request, response);
}
/**
* #see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
}
}
Web.xml
<?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" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>GlobalWeather</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>TestServlet</servlet-name>
<servlet-class>test.TestServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>TestServlet</servlet-name>
<url-pattern>/TestServlet1</url-pattern>
</servlet-mapping>
</web-app>
First and Third answers are right. Either write action="TestServlet1" or action="/Projectname/TestServlet1". If you put /testServet1 in action, it means you are specifying the path the desired file which in this case is wrong while if you use testservlet1 in action , it means you are searching for a file name testservlet1 in your project to run.
404 means that the URL was not found. I suspect that you need the web application name in your URL.
So rather than using a form action of:
/TestServlet1,
try
/name_of_your_web_app/TestServlet1
Just remove tha / in your form action:
<form id="a" action="/TestServlet1">
change it to
<form id="a" action="TestServlet1">
In HTML, adding a / means the relative URL and without a slash means absolute URL. Or better to use the context as mentioned here:
<form id="a" action=${pageContext.request.contextPath}/TestServlet1>
you have to put your contextroot + your servlet name...
contextRoot usually is the name of your project.
action="/nameProject/TestServlet1"
I hope this helps you
Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers.
This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers.
Closed 8 years ago.
Improve this question
I keep getting HTTP method POST is not supported by this URL when calling my httpservlet through an html form. I can't see where I'm going wrong. I'm running this on a Tomcat server. Thanks in advance.
The servlet is supposed to print a set of random numbers to the browser.
Here is my servlet:
package servlets;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.TreeSet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import utilities.RandNumSet;
public class RandomServlet extends HttpServlet {
/**
*
*/
private static final long serialVersionUID = 1L;
public RandomServlet() {
// TODO Auto-generated constructor stub
}
#Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
doPost(req, resp);
}
#Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
PrintWriter out = resp.getWriter();
resp.setContentType("text/html");
TreeSet<Integer> randNum = RandNumSet.generateRandNumSet();
Iterator<Integer> iterator = randNum.iterator();
String numString = "";
while (iterator.hasNext()){
numString = numString + iterator.next() + " ";
}
out.println("<head>");
out.println("<title>");
out.println("Your Random Numbers!");
out.println("</title>");
out.println("</head>");
out.println("<body>");
out.println("<h1> Your Random Numbers! </h1>");
out.println("<h1> "+ numString + " </h1>");
out.println("</body>");
}
}
Here is the calling html form snippet:
<div id ="form">
<form action="RandomServlet" method="post">
<input type="submit" value="Randomize!"/>
</form>
</div>
Here are the web.xml snippets
<servlet>
<display-name>RandomServlet</display-name>
<servlet-name>RandomServlet</servlet-name>
<servlet-class>servlets.RandomServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>RandomServlet</servlet-name>
<url-pattern>/RandomServlet</url-pattern>
</servlet-mapping>
I am using the following way and its works...
first: check the directory first you have made like-
com.ServletExample
|-JavaResource
|-src
|-com.servletExample
|-RandomServlet.java
|-WebContent
|-META-INF
|-WEB-INF
|-Lib
|-web.xml
|-index.jsp
second: index.jsp is here
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<div id ="form">
<form action="RandomServlet" method="post">
<input type="submit" value="Randomize!"/>
</form>
</div>
</body>
</html>
third: RendomServlet.java is here
package com.servletExample;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class RandomServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
public RandomServlet() {
super();
}
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
}
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
PrintWriter out = response.getWriter();
response.setContentType("text/html");
out.println("<head>");
out.println("<title>");
out.println("Your Random Numbers!");
out.println("</title>");
out.println("</head>");
out.println("<body>");
out.println("<h1> Your Random Numbers! </h1>");
out.println("<h1> " + "Hello" + " </h1>");
out.println("</body>");
}
}
fourth: web.xml is here
<?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>JSPExample</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<display-name>RandomServlet</display-name>
<servlet-name>RandomServlet</servlet-name>
<servlet-class>com.servletExample.RandomServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>RandomServlet</servlet-name>
<url-pattern>/RandomServlet</url-pattern>
</servlet-mapping>
</web-app>
I hope this will work.
i have problem how to call post method in java.When i pressed click button on login page after that did not show any thing on the browser.please tell me proper solution.my output show on console.so please tell me what is mistake.thanks in advance.
login.jsp
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<link rel="stylesheet" type="text/css" href="css/loginPage.css" />
<!-- <script src="js/jquery-ui.1.10.4.js"></script> -->
<title>Login Page</title>
</head>
<section class="login">
<div class="titulo">Staff Login</div>
<form action="/AdminLogin" name="AdminLogin" method="post">
<input type="text" title="Username required" placeholder="Username" data-icon="U">
<input type="password" title="Password required" placeholder="Password" data-icon="x">
<div class="olvido">
<div class="col">Register Student</div>
<div class="col">Fotgot Password?</div>
</div>
<button class="enviar">submit</button>
</form>
</section>
</html>
AdminLogin.java
package com.admin.main;
import java.beans.Statement;
import java.io.IOException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.admin.dao.UserMasterConnection;
#WebServlet("/AdminLogin")
public class AdminLogin extends HttpServlet {
private static final long serialVersionUID = 1L;
Statement stmt;
UserMasterConnection userMasterConnection = new UserMasterConnection();
public AdminLogin()
{
super();
}
public void init(ServletConfig config) throws ServletException {
}
protected void service(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
}
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
System.out.println("doget");
}
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException
{
System.out.println("doPost()");
/*System.out.println("dopost");
// connection with database
// Connection connection =
Connection connection = userMasterConnection.getConnection();
String selectTableSQL = "select * from user_detail where username=? and password=?";
try {
stmt = connection.createStatement();
// execute select SQL stetement
ResultSet rs = stmt.executeQuery(selectTableSQL);
while (rs.next())
{
// get username and password from login page
String username = request.getParameter("password");
String password = request.getParameter("username");
System.out.println(username);
}
} catch (SQLException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}*/
String username = request.getParameter("Password");
String password = request.getParameter("Username");
System.out.println("username :-"+username);
System.out.println("password"+password);
}
}
web.xml
<?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"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id="WebApp_ID" version="3.0">
<display-name>SBTsystemAdminView</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>loginPage</servlet-name>
<servlet-class>com.Admin.main.AdminLogin</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>loginPage</servlet-name>
<url-pattern>/loginPage/*</url-pattern>
</servlet-mapping>
</web-app>
Get rid of the empty service method override. Its making the servlet do absolutely nothing. Read the documentation for HTTPServlet concerning the service method:
protected void service(HttpServletRequest req,
HttpServletResponse resp)
throws ServletException,
java.io.IOException
Receives standard HTTP requests from the public service method and dispatches them
to the doXXX methods defined in this class. This method is an HTTP-specific version
of the Servlet.service(javax.servlet.ServletRequest,
javax.servlet.ServletResponse) method. There's no need to override
this method.
In other words, the standard implementation of this method figures out whether the request is GET or POST and routes to the doGet or doPost functions. If you override this method, especially with a blank function, then you are preventing the doGet and doPost functions from ever being reached.
This question already has answers here:
Servlet returns "HTTP Status 404 The requested resource (/servlet) is not available"
(19 answers)
Closed 6 years ago.
ED: this question is not a duplicate. the alleged duplicate makes no mention of the error that was in my console, and the solution to my problem is not found in the linked question.
i'm using derek banas's tutorials to learn servlets right now. or at least, i'm trying to! i keep encountering a 404 error when i submit my form.
here is my code. first, the java class:
package helloservlets;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class Lesson41
*/
#WebServlet
public class Lesson41 extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* #see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String usersName = request.getParameter("yourname");
String theLang = request.getParameter("Language");
int firstNum = Integer.parseInt(request.getParameter("firstnum"));
int secondNum = Integer.parseInt(request.getParameter("secondnum"));
int sumONum = firstNum + secondNum;
response.setContentType("text/html");
PrintWriter output = response.getWriter();
output.println("<html><body><h3>Hello " + usersName);
output.println("</h3><br />" + firstNum + " + " + secondNum);
output.println(" = " + sumONum + "<br />Speaks " + theLang + "</body></html>");
}
/**
* #see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}
my web.xml file:
<?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"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id="WebApp_ID" version="3.0">
<servlet>
<servlet-name>Lesson41</servlet-name>
<servlet-class>helloservlets.Lesson41</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Lesson41</servlet-name>
<url-pattern>/Lesson41</url-pattern>
</servlet-mapping>
</web-app>
and my html:
<!DOCTYPE html>
<html>
<head>
<meta charset="US-ASCII">
<title>Insert title here</title>
</head>
<body>
<form method="post" action="http://localhost:8080/Lesson41/">
What's your name?<br /> <input name="yourname" /><br /> First
Number <input name="firstnum" /><br /> Second Number <input
name="secondnum" /><br /> <input type="hidden" name="Language"
value="English" /><br /> <input type="submit" />
</form>
</body>
</html>
in my console, i am getting this warning:
WARNING: [SetContextPropertiesRule]{Context} Setting property 'source' to 'org.eclipse.jst.jee.server:Lesson41' did not find a matching property.
and that's the only warning i'm getting. i googled it and followed the advice i found here, but it hasn't fixed my problem.
thank you in advance for any help!
Are you sure the url in the form is correct? http://localhost:8080/Lesson41/
If you are using Eclipse, by default it deploys your application as http://localhost:8080/[Your-Project-Name-Here]/Lesson41/