WHAT ARE THE STEPS TO CONNECT TO THE DATABASE IN JAVA?

Mayank Tripathi

Total Post:807

Points:4035
Posted by  Mayank Tripathi
Java 
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  1. Mayank Tripathi

    Post:807

    Points:4035
    What are the steps to connect to the database in java?

    1.Registering the driver class
    2.Creating connection
    3.Creating statement
    4.Executing queries
    5.Closing connection

    Example:
    import java.sql.*;  
    class OracleCon{  
    public static void main(String args[]){  
    try{  
    //step1 load the driver class  
    Class.forName("oracle.jdbc.driver.OracleDriver");  
      
    //step2 create  the connection object  
    Connection con=DriverManager.getConnection(  
    "jdbc:oracle:thin:@localhost:1521:xe","system","oracle");  
      
    //step3 create the statement object  
    Statement stmt=con.createStatement();  
      
    //step4 execute query  
    ResultSet rs=stmt.executeQuery("select * from emp");  
    while(rs.next())  
    System.out.println(rs.getInt(1)+"  "+rs.getString(2)+"  "+rs.getString(3));  
      
    //step5 close the connection object  
    con.close();  
      
    }catch(Exception e){ System.out.println(e);}  
      
    }  
    }  


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