Servlet program to read POST Data

in order to pass a post parameter we need a html form consider the following html page:

<pre class="prettyprint">

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Post parameter </title>
</head>
<body>
<b>Servlet Post</b>
<form method="post" action="PostTest">
//Her the action redirect to the servlet path
<input type="text" name="uname" />
<input type="submit" value="Enter" >
</form>
</body>
</html>

</pre>

Servlet code would be looks like this:

package servlets.first;

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 PostTest
*/
@WebServlet("/PostTest")
public class PostTest extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#HttpServlet()
     */
    public PostTest() {
        super();
        // TODO Auto-generated constructor stub
    }
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
           String uname;
           response.setContentType("text/html");
           PrintWriter out= response.getWriter();
           uname= request.getParameter("uname");
           out.println("<B>Uname:" +uname +"</B>");
    }

}

Comments

a simple example for jdbc PreparedStatement

a simple example for PreparedStatement package basics.in.java.blogspot.in; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; public class Main { private static final String USERNAME="root"; private static final String PASSWORD=""; private static final String CONN_STRING="jdbc:mysql://localhost/basicsinjavablogspot"; public static void main(String[] args) throws ClassNotFoundException, SQLException { Class.forName("com.mysql.jdbc.Driver"); Connection conn=null; Statement stmt=null; ResultSet rs=null; try { conn= DriverManager.getConnection(CONN_STRING, USERNAME, PASSWORD); System.out.println("database connection successful"); //stmt=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_READ_ONLY); String sql="select * fr...

spring boot CORS filter along with spring security and OAuth2 (@EnableOAuth2Sso)

spring boot CORS filter along with spring security and OAuth2 (@EnableOAuth2Sso) import org.springframework.stereotype.Component; import javax.servlet.*; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException;

Server-Side Pagination with React-Table and Spring Boot JPA with H2 Database

Pagination is a common technique used to split large amounts of data into smaller, more manageable chunks. With server-side pagination, data is retrieved from the server in smaller batches, reducing the amount of data transferred over the network and improving application performance. React-Table provides a wide range of built-in features such as sorting, filtering, pagination, row selection, and column resizing. These features can be easily configured and customized to fit specific requirements. For example, you can customize the sorting behavior to handle multiple sorting criteria, or you can add custom filters to the table to handle complex data filtering scenarios. Additionally, React-Table provides a flexible API that allows developers to extend its functionality with custom hooks, plugins, and components. This means that you can easily add custom functionality to the table, such as exporting data to CSV or integrating with external data sources. In terms of styl...

Basics In Java

Search This Blog