寫到查詢學(xué)生數(shù)據(jù)的部分時(shí)，單獨(dú)運(yùn)行數(shù)據(jù)庫(kù)連接工具類，運(yùn)行結(jié)果為數(shù)據(jù)庫(kù)連接成功
而在訪問(wèn)servlet時(shí)，卻出現(xiàn)http status 500-注冊(cè)驅(qū)動(dòng)失敗的錯(cuò)誤
getConnection()函數(shù)如下:
public static Connection getConnection(){
try{
Class.forName(driver);
Conn=DriverManager.getConnection(url,username,password);
System.out.println(“數(shù)據(jù)庫(kù)連接成功”);
}catch(Exception e)
{
throw new RuntimeException(“注冊(cè)驅(qū)動(dòng)失敗”);}
return conn;
}
訪問(wèn)servlet之后，出現(xiàn)的錯(cuò)誤提示為:
Servlet.service() for servlet [SubListServlet] in context with path [/SubListDemo] threw exception
請(qǐng)問(wèn)有哪位遇到過(guò)這種問(wèn)題啊，求解答，謝謝大家???