Linux 下使用Java连接 mysql

String url ="jdbc:mysql://"+ host +":"+ port +"/"+ database +"?useUnicode=true&characterEncoding="+ENCODING;
try
{
Connection conn = DriverManager.getConnection(url, username, password);
if (!conn.isClosed())
{
Debug.println("数据库连接成功！");
query(conn, client, sql);
}
else
{
client.stopThread();
Debug.println("数据库已关闭！");
}
}
catch (SQLException e)
{
client.stopThread();
Debug.println("数据库连接失败！");
}