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Old July 27th, 2008, 06:23 PM
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Default Error Http 500 using jsp

Hi, I am new to using JSP and tomcat and I am trying to display images from my database but I keep getting this error.

An error occurred at line: 7 in the jsp file: /booksavers/categories.jsp
CatId cannot be resolved
4: <%
5: int CatID = Integer.parseInt(request.getParameter("CatID"));
6: PreparedStatement statement = con.prepareStatement("select * from Book where CatId = ?");
7: statement.setInt(1,CatId);
8: ResultSet resultSet = statement.executeQuery();
9: %>

An error occurred at line: 18 in the jsp file: /booksavers/categories.jsp
CatId cannot be resolved
15: </head>
17: <body>
18: <h1 align="center">Categories = <%= CatId %></h1>
19: <p>
20: <table align="center">
21: <tr>

I am not quite sure what is the problem here, the following below shows the code I have used.

<%@ include file ="connection.jsp" %>

  int CatID = Integer.parseInt(request.getParameter("CatID"));
  PreparedStatement statement = con.prepareStatement("select * from Book where CatId = ?");
  ResultSet resultSet = statement.executeQuery();

<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">

<h1 align="center">Categories = <%= CatId %></h1>

would someone please help me out with this.


Old July 27th, 2008, 11:35 PM
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The integer variable CatID is the problem. If you observe the following two lines taken from your code
int CatID = Integer.parseInt(request.getParameter("CatID"));

variable name is not the same. declaration uses 'CatID' and while using 'CatId'.
at line number two try using 'CatID'.

- Rakesh

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