Ich habe folgende Fehlermeldung und komme nicht weiter: Was habe ich falsch gemacht?
javax.servlet.ServletException: The "." operator was supplied with an index value of type "java.lang.String" to be applied to a List or array, but that value cannot be converted to an integer.
Der zugehörige Eintrag in der Datenbank lautet:
CREATE TABLE ORDER_TITLE(ORDER_TITLE_ID BIGINT NOT NULL PRIMARY KEY,ORDER_NAME VARCHAR(2) NOT NULL)
Derzugehörige Filter lautet:
die zugehörige select-Methode in der OrderTitleDAO lautet:
javax.servlet.ServletException: The "." operator was supplied with an index value of type "java.lang.String" to be applied to a List or array, but that value cannot be converted to an integer.
Der zugehörige Eintrag in der Datenbank lautet:
CREATE TABLE ORDER_TITLE(ORDER_TITLE_ID BIGINT NOT NULL PRIMARY KEY,ORDER_NAME VARCHAR(2) NOT NULL)
Derzugehörige Filter lautet:
Code:
public class EingabeFilter implements Filter {
private FilterConfig filterConfig = null;
public void init(FilterConfig filterConfig) throws ServletException {
this.filterConfig = filterConfig;
}
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
if ( request instanceof HttpServletRequest) {
HttpServletRequest req = (HttpServletRequest) request;
Collection orderTitle = (Collection) req.getSession().getAttribute("orderTitle");
if (orderTitle != null) {
System.out.println("list of OrderTitles");
}
else {
OrderTitleDAO dao = new OrderTitleDAO();
orderTitle = dao.select();
((HttpServletRequest) request).getSession().setAttribute("orderTitle", orderTitle);
System.out.println("get new list of OrderTitles ...");
}
}
chain.doFilter(request, response);
}
public void destroy() {
}
}die zugehörige select-Methode in der OrderTitleDAO lautet:
Code:
public Collection select() {
Collection orderTitles = new ArrayList();
Connection con = DBConnect.getConnection();
Statement pstmt = null;
ResultSet rs = null;
try {
pstmt = con.createStatement();
rs = pstmt.executeQuery(SELECT);
while(rs.next()) {
OrderTitle orderTitle = new OrderTitle();
orderTitle.setId(new Long(rs.getLong("ORDER_TITLE_ID")));
orderTitle.setName(rs.getString("ORDER_NAME"));
orderTitles.add(orderTitle);
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
try {
pstmt.close();
con.close();
} catch (Exception e) {
e.printStackTrace();
}
}
return orderTitles;
}
