ProductListServlet.java 文件源码

@Override
protected void doGet(HttpServletRequest request,
 HttpServletResponse response) throws ServletException, IOException {

    Connection conn = MyUtils.getStoredConnection(request);

    String errorString = null;
    List<Product> list = null;
    try {
        if (conn == null) // if conn was not stored
            conn = ConnectionUtils.getConnection();
        list = DBUtils.queryProduct(conn);
    } catch (Exception e) {
        e.printStackTrace();
        errorString = e.getMessage();
    }

    // store info in request attribute, before forward to views
    request.setAttribute("errorString", errorString);
    request.setAttribute("productList", list);

    // forward to /WEB-INF/views/productListView.jsp
    RequestDispatcher dispatcher = request.getServletContext()
            .getRequestDispatcher("/WEB-INF/views/productListView.jsp");
    dispatcher.forward(request, response);
}