Java uses jdbc to connect to SQL database instances

<P> import java. SQL. *; </p> <p> public class test {
Public static void main (String [] args ){
String JDriver = "com. microsoft. sqlserver. jdbc. SQLServerDriver"; // SQL Database Engine
String connectDB = "jdbc: sqlserver: // localhost: 1433; DatabaseName = ***"; // Data Source
Try
{
Class. forName (JDriver );
} Catch (ClassNotFoundException e)
{
System. out. println ("failed to load database engine ");
System. exit (0 );
}
System. out. println ("database driver succeeded ");

Try
{
String user = "sa ";
String password = "<a href =" mailto: sy@50.129 "> *** </a> ";
Connection con = DriverManager. getConnection (connectDB, user, password); // connect to the database object
System. out. println ("database connected successfully ");
Statement stmt = con. createStatement (); // create an SQL command object
System. out. println ("start to read data ");
ResultSet rs1_stmt.exe cuteQuery ("SELECT * FROM user_info"); // return the SQL statement query result set (SET)
// Output each record cyclically
While (rs. next ())
{
// Output each field
System. out. println (rs. getString (1) + "\ t" + rs. getString (2) + "\ t" + rs. getString (3 ));
}
System. out. println ("read finished ");

// Close the connection
Stmt. close (); // close the connection to the command object
Con. close (); // close the database connection
}
Catch (SQLException e)
{
E. printStackTrace ();
// System. out. println ("database connection error ");
System. exit (0 );
}
}
} </P>