import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
 
 
 
public class DBUtils {
 
    public static final String url = "jdbc:mysql://127.0.0.1/lvyun";  
    public static final String name = "com.mysql.jdbc.Driver";  
    public static final String user = "root";  
    public static final String password = "root";
    //开启连接
    public static Connection creatConnection(){
        Connection conn = null;
        try {
            Class.forName(name);
            conn = DriverManager.getConnection(url, user, password);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return conn;
    }
    //执行语句
    public PreparedStatement getps(Connection conn,String sql){
        PreparedStatement ps = null;
        try {
            ps = conn.prepareStatement(sql);
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return ps;
    } 
    //关闭Connection
    public static void close(Connection conn) {  
        if(conn!=null){
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }  
     
    //关闭PreparedStatement
    public static void close(PreparedStatement ps) {  
        if(ps!=null){
            try {
                ps.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }  
}