servlet Archives - Ebhor.com

Java Servlet Response JSON in JSP using Gson

March 19, 2023March 19, 2023 by manish

In Modern web applications, We get data from the server in JSON format and display data in JSP or HTML page using Front end library or frameworks like Angular, React, etc. This is similar to mobile app development. Here we will see how we can get JSON Response from the servlet and show it in … Read more

ServletConfig to access multiple initial parameter value

February 10, 2023February 8, 2023 by manish

ServletConfig is ued to configure the servlet. We can configure values in the ServletConfig object and can access them later on. There can one or more values can be stored. ServletConfig stores values in key values pair. ServletConfig to access initial parameter value All values are stored in key-value pairs in <servlet> the tag in … Read more

Servlet Annotation WebServlet Example

November 8, 2019February 4, 2017 by manish

First example to show Servlet Welcome. For this we have created index.html page on index.html we have created a link. on click at link it will call welcome servlet. Our project directory structure is as below index.jsp

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>First page</title>
    </head>
    <body>
        <h1><a href="welcome">Show welcome servlet</a> </h1>
    </body>
</html>

<%@page contentType="text/html" pageEncoding="UTF-8"%>

<!DOCTYPE html>

<html>

<head>

<title>First page</title>

</head>

<body>

<h1><a href="welcome">Show welcome servlet</a> </h1>

</body>

</html>

Welcome.java

package ebhor.servlet;

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;

@WebServlet(name = "Welcome", urlPatterns = {"/welcome"})
public class Welcome extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            out.println("<!DOCTYPE html>");
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet Welcome</title>");
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet Welcome </h1>");
            out.println("</body>");
            out.println("</html>");
        } finally {
            out.close();
        }
    }

}

package ebhor.servlet;

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;

@WebServlet(name = "Welcome", urlPatterns = {"/welcome"})

public class Welcome extends HttpServlet {

@Override

protected void doGet(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

response.setContentType("text/html;charset=UTF-8");

PrintWriter out = response.getWriter();

try {

out.println("<!DOCTYPE html>");

out.println("<html>");

out.println("<head>");

out.println("<title>Servlet Welcome</title>");

out.println("</head>");

out.println("<body>");

out.println("<h1>Servlet Welcome </h1>");

out.println("</body>");

out.println("</html>");

} finally {

out.close();

}

@WebServlet(name = “Welcome”, urlPatterns = {“/welcome”}) here urlPattern maps /welcome to Welcome.java. <a href=”welcome”>Show welcome … Read more