mysql - JSP 页面内存泄漏

Question

我在 netBeans 中创建了一个登录系统。当 login.jsp 开始加载时，我有 index.jsp 和一个调用 login.jsp （你在下面看到的）的表单，它从未完成加载，加载循环一直在进行，然后 Tomcat 告诉我这可能会导致内存泄漏，想法？

<% 
   Connection connectionDB = null;
   PreparedStatement psDB = null;
   ResultSet rsDB = null;
   String getUsername = request.getParameter("loginUsername");
   String getPassword = request.getParameter("loginPassword");
   String sql = "SELECT Username, Password FROM SKAWEB WHERE Username= '" + 
       getUsername + "' AND Password='" + getPassword + "'";
   String driverName = "com.mysql.jdbc.driver";
   String DATABASE_URL = "jdbc:mysql://localhost:1527/SKAWEB";
   String userDB = "emmron";
   String passDB = "test";
   out.println("testing123");
   DriverManager.registerDriver(new com.mysql.jdbc.Driver());
   try { 
       connectionDB = DriverManager.getConnection(DATABASE_URL, userDB, passDB);
       psDB = connectionDB.prepareStatement(sql);
       rsDB = psDB.executeQuery();
       out.println("hello");
       if(rsDB.next()) { 
           out.println("yay");
       }
   }
   catch (Exception errorMessage) {
       errorMessage.printStackTrace();
       out.println("blah");
   }
%>