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使用 netbeans 我创建了一个 web 应用程序，带有提交按钮的 html 表单导致一个 servlet。我想打印我的 derby db 的结果。目前，当我运行它时，html 页面加载正常，但此 servlet 的提交链接给出“SQLException 捕获：发生连接身份验证失败。原因：用户 ID 或密码无效。” 我检查了数据库凭据，用户是正确的，并且密码被记住了。

请参阅下面的 servlet 代码

protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException, ClassNotFoundException, SQLException {
        Connection con = null;
       Statement stmt = null;
       ResultSet rs = null;

        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            Class.forName("org.apache.derby.jdbc.EmbeddedDriver");
            con = DriverManager.getConnection("jdbc:derby://localhost:1527/movies;user=tb");
            stmt = con.createStatement();

        rs = stmt.executeQuery("SELECT * FROM TB.MOVIES");

        while (rs.next()) {
        String s = rs.getString("TITLE");
        //float n = rs.getFloat("Age");
        out.println(s + "   ");
        }

            /* TODO output your page here. You may use following sample code. */
            out.println("<!DOCTYPE html>");
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet NewServlet</title>");            
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet NewServlet at " + request.getContextPath() + "</h1>");
            out.println("</body>");
            out.println("</html>");
        }
        catch(ClassNotFoundException e)

        {

          out.println("Couldn't load database driver: " + e.getMessage());

        }

      catch(SQLException e)

        {

          out.println("SQLException caught : " + e.getMessage());

        }
        finally {            
            out.close();
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