把JDBC接口放在靜態代碼塊static{}裏邊就可以達到只開啟壹次就可以了
publicclassConnUtil{
static{
try{
Class.forName("com.mysql.jdbc.Driver");//*鏈接數據庫驅動
}catch(e){
e.();
}
}
publicstaticConnection()
throws{
Connectionconn=.(
//******鏈接路徑
"jdbc:mysql://localhost:3306/tarena","root","1234");
returnconn;
}
publicstaticvoid(
//***關閉數據庫
Connectionconn)throws{
conn.close();
}