Java Connecting to database
Need an example code for Connecting application to database.
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March 17, 2008 at 8:52 PM
Java - Connecting to database
Hi, here I am providing you java example code that will help you to connect to database and you can insert values into two tables simultaneously.
Servletform.html
<html>
<head>
<title>registration form</title>
</head>
<body>
<table border="1" width="50%" cellpadding="0" cellspacing="0">
<tr>
<td width="100%">
<h2>Registration form</h2>
<form method="GET" action="DataInsertServlet">
<table border="1" width="100%" cellspacing="0" cellpadding="0">
<tr>
<td><b>Name:</b></td>
<td><input type="text" name="firstname" size="30"></td>
</tr>
<tr><td><b>Address:</b></td>
<td><input type="text" name="address" size="50"></td>
</tr>
<tr>
<td><b>E-mail:<b></td>
<td><input type="text" name="email" size="30"></td>
</tr>
<tr><td><b>Contect No:</b></td>
<td><input type="text" name="contect" size="30"></td>
</tr>
<tr>
<td> </td>
<td><input type="submit" value="Submit" name="B1"></td>
</tr>
</table>
</form>
<p> </p>
</tr>
</td>
</table>
</body>
</html>
DataInsertServlet.java
import java.io.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class DataInsertServlet extends HttpServlet{
public void doGet(HttpServletRequest request, HttpServletResponse response)throws
ServletException, IOException{
response.setContentType("text/html");
PrintWriter out = response.getWriter();
Connection con = null;
String url = "jdbc:mysql://localhost:3306/";;
String db = "register";
String driver = "com.mysql.jdbc.Driver";
try{
Class.forName(driver);
con = DriverManager.getConnection(url+db,"root","root");
try{
Statement st = con.createStatement();
String firstname=request.getParameter("firstname");
String address=request.getParameter("address");
String email=request.getParameter("email");
String contect=request.getParameter("contect");
int val = st.executeUpdate("insert regiform values('"+firstname+"','"+address+"','"+email+"','"+contect+"')");
con.close();
out.println("Successfully insert data in database");
}
catch (SQLException ex){
System.out.println("SQL statement is not executed!");
}
}
catch (Exception e){
e.printStackTrace();
}
}
}
web.xml
<?xml version="1.0" encoding="ISO-8859-1"?>
<!--<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">; -->
<web-app>
<servlet>
<servlet-name>DataInsert</servlet-name>
<servlet-class>DataInsertServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>DataInsert</servlet-name>
<url-pattern>/DataInsertServlet</url-pattern>
</servlet-mapping>
</web-app>
- - - - - - - - - - - - -
;) Meeya
Hi, here I am providing you java example code that will help you to connect to database and you can insert values into two tables simultaneously.
Servletform.html
<html>
<head>
<title>registration form</title>
</head>
<body>
<table border="1" width="50%" cellpadding="0" cellspacing="0">
<tr>
<td width="100%">
<h2>Registration form</h2>
<form method="GET" action="DataInsertServlet">
<table border="1" width="100%" cellspacing="0" cellpadding="0">
<tr>
<td><b>Name:</b></td>
<td><input type="text" name="firstname" size="30"></td>
</tr>
<tr><td><b>Address:</b></td>
<td><input type="text" name="address" size="50"></td>
</tr>
<tr>
<td><b>E-mail:<b></td>
<td><input type="text" name="email" size="30"></td>
</tr>
<tr><td><b>Contect No:</b></td>
<td><input type="text" name="contect" size="30"></td>
</tr>
<tr>
<td> </td>
<td><input type="submit" value="Submit" name="B1"></td>
</tr>
</table>
</form>
<p> </p>
</tr>
</td>
</table>
</body>
</html>
DataInsertServlet.java
import java.io.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class DataInsertServlet extends HttpServlet{
public void doGet(HttpServletRequest request, HttpServletResponse response)throws
ServletException, IOException{
response.setContentType("text/html");
PrintWriter out = response.getWriter();
Connection con = null;
String url = "jdbc:mysql://localhost:3306/";;
String db = "register";
String driver = "com.mysql.jdbc.Driver";
try{
Class.forName(driver);
con = DriverManager.getConnection(url+db,"root","root");
try{
Statement st = con.createStatement();
String firstname=request.getParameter("firstname");
String address=request.getParameter("address");
String email=request.getParameter("email");
String contect=request.getParameter("contect");
int val = st.executeUpdate("insert regiform values('"+firstname+"','"+address+"','"+email+"','"+contect+"')");
con.close();
out.println("Successfully insert data in database");
}
catch (SQLException ex){
System.out.println("SQL statement is not executed!");
}
}
catch (Exception e){
e.printStackTrace();
}
}
}
web.xml
<?xml version="1.0" encoding="ISO-8859-1"?>
<!--<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">; -->
<web-app>
<servlet>
<servlet-name>DataInsert</servlet-name>
<servlet-class>DataInsertServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>DataInsert</servlet-name>
<url-pattern>/DataInsertServlet</url-pattern>
</servlet-mapping>
</web-app>
- - - - - - - - - - - - -
;) Meeya
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