数据库高级应用

<pre name="code" class="java">package haha;

import java.sql.Connection;
import java.sql.DriverManager;//接口
//import java.sql.ResultSet;
import java.sql.SQLException;
//import java.sql.Statement;

public class bb {
static String driver="org.gjt.mm.mysql.Driver";
private static String url = "jdbc:mysql://localhost:3306/login" ;
private static String username = "root" ;
public static final String password = "root" ;
static{
try {//加载数据库驱动
Class.forName(driver);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static Connection getConnection(){//数据库的连接
Connection conn=null;
try {
conn=DriverManager.getConnection(url,username,password);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return conn;
}
}

package haha;

import java.sql.Connection;

public class Demo {

public static void main(String[] args) {
// TODO Auto-generated method stub

Connection conn=bb.getConnection();
if(conn!=null){
System.out.println("Connection success");
}else
{
System.out.println("Not Connection success");
}
}
}

结果出现 connection success  则连接成功。