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Connect to mysql database using jsp

by admin · September 22, 2012

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Connect to MySQL database using jsp

This can be deployed in apache tomcat and Table needs to be created in Mysql. This is the very first tutorial on JSP and MYSQL in our website. A special thanks to Sean Ni Cleirigh for his support.

Steps to Follow:

1. create a database named ‘user’ in mysql and create table “user_details”.
2. Create an application directory named ‘user’ in the Tomcat.
3. Before running this java code you need mysql connector jar
in the /webapps/user/WEB-INF/lib directory.

Creating JSP pages:
In this example, we have created two JSP pages.
First page is to provide link to create table and the next page for processing the table creation.

1. Hello_database_query.jsp
2.create_table.jsp

1. Hello_database_query.jsp

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<%@ page import="java.sql.*" %>
<%@ page import="java.io.*" %>
<html>
    <head>
        <title>Create table in mysql database using jsp</title>
    </head>
    <body>
        <TABLE style="background-color: #ffffcc;">
            <TR>
                <TD align="center"><h2>To create
                    table click on the link given below</h2></TD>
            </TR>
            <TR>
                <TD align="center"><A HREF="create_table.jsp">
                <font size="+2" color="blue">create table</font>
            </TR>
        </TABLE>
    </body>
</html>

Save this code as a .jsp file named “Hello_database_query.jsp” in the directory Tomcat-6.0.16/webapps/user/.
You can run this jsp page typing http://localhost:8080/user/Hello_database_query.jsp url in address bar of the browser.

2.create_table.jsp

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<%@ page import="java.sql.*" %>
<%@ page import="java.io.*" %>
<html>
    <head>
        <title>display data from the table using jsp</title>
    </head>
    <body>
        <%
            /* Create string of connection url within specified
                 format with machine name, port number
            and database name. Here machine name id localhost
              and database name is user. */
            String connectionURL = "jdbc:mysql://localhost:3306/user";
            // declare a connection by using Connection interface
            Connection connection = null;
            // declare object of Statement interface that is used for
            // executing sql statements.
            Statement statement = null;
            try {
                // Load JBBC driver "com.mysql.jdbc.Driver".
                Class.forName("com.mysql.jdbc.Driver").newInstance();
                /* Create a connection by using getConnection() method
                   that takes parameters of string type connection url, user
                   name and password to connect to database. */
                connection =
                   DriverManager.getConnection(connectionURL, "root", "root");
                /* createStatement() is used for create statement object
                  that is used for sending
                sql statements to the specified database. */
                statement = connection.createStatement();
                // sql query to retrieve values from the secified table.
                String QueryString =
                 "create table user_details(id int not null auto_increment,name " +
                        "varchar(25),city varchar(20), primary key(id));";
                // execyteUpdate() mothod execute specified sql query.
                statement.executeUpdate(QueryString);
        %> <TABLE border="0" style="background-color: #ffffcc;">
        <TR>
            <TD align="center" ><font size="+3" color="green">Congratulations !
                </font></TD>
            <tr><TD align="center" ><font size="+2">Table of specified name is
                created successfully.</font>
            </TD></tr>
        </TR>
        <% } catch (Exception ex) {%>
        <TABLE border="0" style="background-color: #ffffcc;">
            <TR>
                <TD align="center" ><font size="+3" color="red">Some problems
               to create table.</font></TD>
            </TR>
            <% } finally {
                // close all the connections.
                statement.close();
                connection.close();
            }
            %><tr><td align="center" >
                    <A HREF="Hello_database_query.jsp">
                <font size="5" color="blue">back to home page</font></A></td>
        </tr>  </TABLE>
    </body>
</html>

Save this code with name “create_table.jsp” in the directory /webapps/user/.
This jsp code creates table of specified name in the mysql database and shows a response page.
If table exists already or found any error to make connection with database then shows an error page.
Thanks to codingbasics.