Connection conn = null;
Statement stmt=null;
ResultSet rset=null;
String jdbc_url="jdbc:oracle:thin:hr/hr@bassam-desktop:1521:XE";
String query="";
try
{
DriverManager.registerDriver(new oracle.jdbc.OracleDriver());
conn=DriverManager.getConnection(jdbc_url);
stmt=(Statement) conn.createStatement();
query="select first_name" +"from employees"+"where employeed_id=100";
rset=stmt.executeQuery(query);
System.out.println(rset.getString(1));
}
catch(SQLException | NumberFormatException e)
{
System.out.println("result error");
}
finally{
try{
rset.close();
stmt.close();
conn.close();
}
catch(Exception e)
{
System.out.println("Error in closing");
}
}
我在结果窗口中遇到两个错误,这是什么问题? hr密码正确,我的主机名正确,这不是在Windows XP中右键单击“我的电脑”后从“计算机名”获得的密码吗?
编辑:使用e.getMessage()后,我得到了..
result error, ResultSet.next was not called
最佳答案
您已在注释中添加了异常的错误消息,告诉您出了什么问题:
结果错误,未调用ResultSet.next
您忘记了在访问结果集的第一行之前调用ResultSet.next():
if (rset.next()) {
System.out.println(rset.getString(1));
}