JDBC连接示例程序-Oracle和MySQL

import java.sql.*;
/*
* 数据库 jdbc
* 严谨示例程序
*/
public class TestJDBC
{
public static void main (String[] args)
{
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
try
{
Class.forName("oracle.jdbc.driver.OracleDriver");
conn = DriverManager.getConnection("jdbc:oracle:thin:@192.168.0.1:MINEDB", "root","password");
stmt = conn.createStatement();
rs = stmt.executeQuery("select * from dept");

while(rs.next())
{
System.out.println(rs.getString("deptno"));
System.out.println(rs.getInt("deptno"));
}
}
catch(ClassNotFoundException e)
{
e.printStackTrace();
}
catch(SQLException e)
{
e.printStackTrace();
}
finally
{
try
{
if(rs != null)
{
rs.close();
rs=null;
}
if(stmt != null)
{
stmt.close();
stmt=null;
}
if(conn !=null)
{
conn.close();
conn=null;
}
}
catch(SQLException e)
{
e.printStackTrace();
}
}
}
}

package bean;

import java.sql.*;

public class TestMysqlConnection
{
public static void main(String[] args)
{
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
try
{
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/mydata?useUnicode=true&characterEncoding=utf-8&useSSL=false&user=root&password=11235");
stmt = conn.createStatement();
rs = stmt.executeQuery("select * from dept");
while (rs.next())
{
System.out.println(rs.getString("loc"));
}
}
catch (ClassNotFoundException e)
{
e.printStackTrace();
}
catch (SQLException e)
{
e.printStackTrace();
}
finally// 先开后关
{
try
{
if (rs != null)
{
rs.close();
rs = null;//让垃圾收集器可以随时回收
}
if (stmt != null)
{
stmt.close();
stmt = null;
}
if (conn != null)
{
conn.close();
conn = null;
}
}
catch (SQLException e)
{
e.printStackTrace();
}
}
}

}