错误：java.sql.SQLException：ORA-01017：用户名/密码无效;登录被拒绝

我在数据库中输入了10个问题及其答案 . 我开始项目，我登录了候选人ID . 在那之后我给了承认id，它被接受了 . 之后我尝试打开这个页面（这个页面打算打开测试页面，这将打开问题），我收到错误信息 - java.sql.SQLException：ORA-01017：用户名/密码无效;登录被拒绝据我所知，项目编码没有错误 . 所以我没有发布编码 . 错误是数据库连接中的某个地方 . （我看过其他主题有这个错误，但找不到帮助） .

{   if(minutes==0 && seconds==0)
    {
       alert('Oops ! ! Time up '+
            'Test Submitted Successfully');
        VerbForm.submit();
    }
seconds=60;
minutes--;
window.setTimeout("timer()", 1000 );

}
}

" name=" forma“> Time Remaining:
" style="边框：0px纯白色;后台：＃F0EFE2 ">:" style = "border:0px solid white; background: #F0EFE2"> timer（）;

</div>



  <div id="site_content">

  <div id="content">

    <%
    try{
    int i=1;
    Random rand =new Random();
    int newrand=rand.nextInt(9);
    session.setAttribute("verbrandom",String.valueOf(newrand));
    Class.forName("oracle.jdbc.driver.OracleDriver");
    Connection con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","java","12345");
     String admitid=session.getAttribute("admitid").toString();
    int aid=Integer.parseInt(admitid); 
    PreparedStatement ps1=con.prepareStatement("select verbkey from result where admitid=?");
    ps1.setInt(1,aid);
    ResultSet rs1=ps1.executeQuery();
    rs1.next();
    if(rs1.getInt("verbkey")==1)
                   {
                    response.sendRedirect("AlreadyExam.jsp");
                   }
           else
           {
    PreparedStatement ps=con.prepareStatement("select * from verbal where qid>? order by qid");
    ps.setInt(1,newrand);
    ResultSet rs=ps.executeQuery();
        while(rs.next() && i<=10)
        {
    %>

    <form action="VerbalResult.jsp" align="left" name="VerbForm">



        <P><b><%=i%>. <%=rs.getString("question")%></b><BR><BR>

" value=" <％= rs.getString（"option1"）％> "> A. <%=rs.getString(" option1 ")%> " value = "<%=rs.getString(" option2 ")%>"> B. <％= rs.getString（"option2"）％>

" value=" <％= rs.getString（"option3"）％> "> C. <%=rs.getString(" option3 ")%> " value = "<%=rs.getString(" option4 ")%>"> C. <％= rs.getString（"option4"）％>

<%
                i++;
                     } rs.close();
                        ps.close();        
                        } 
                     con.close();
                     rs1.close();
                     ps1.close();


    }
    catch(NullPointerException e)
                          {
        response.sendRedirect("CandidateLogin.jsp");
    }
            %>

<p><input style="padding-top: 25px; font: 100% arial; border: 1px solid; width: 170px; margin: 0 0 0 212px; height: 33px; padding: 2px 0 3px 0;cursor: pointer;background: #7D0F0F; color: #FFF;"  class="submit" type="submit" onclick="DoneTest()" name="TestButton" value="Submit Verbal Test"></p>