How to create Servlet or call servlet
step 1:
create a index.jsp file or index.html file and make a form.
index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="Display" method="post">
first name:<input type="text" name="firstName"><br>
last name:<input type="text" name="lastName" ><br>
<input type="submit" value="submit">
</form>
</body>
</html>
pageEncoding="UTF-8"%>
<!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=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="Display" method="post">
first name:<input type="text" name="firstName"><br>
last name:<input type="text" name="lastName" ><br>
<input type="submit" value="submit">
</form>
</body>
</html>
Step 2:
Now create a servlet display.java
Display.java
package com.jsp.test;
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 Display extends HttpServlet{
/**
*
*/
private static final long serialVersionUID = 5346650776384140650L;
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String firstNAme=request.getParameter("firstName");
String lastName=request.getParameter("lastName");
PrintWriter out=response.getWriter();
out.print("Welcome"+" "+firstNAme+" "+lastName);
out.close();
}
}
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 Display extends HttpServlet{
/**
*
*/
private static final long serialVersionUID = 5346650776384140650L;
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String firstNAme=request.getParameter("firstName");
String lastName=request.getParameter("lastName");
PrintWriter out=response.getWriter();
out.print("Welcome"+" "+firstNAme+" "+lastName);
out.close();
}
}
Step 3:
configure web.xml
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" 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_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>JSP</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>Display</servlet-name>
<servlet-class>com.jsp.test.Display</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Display</servlet-name>
<url-pattern>/Display</url-pattern>
</servlet-mapping>
</web-app>
<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_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>JSP</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>Display</servlet-name>
<servlet-class>com.jsp.test.Display</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Display</servlet-name>
<url-pattern>/Display</url-pattern>
</servlet-mapping>
</web-app>
