📄 controller.java
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import java.io.IOException;import javax.servlet.ServletConfig;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;public class Controller extends HttpServlet { public void init(ServletConfig conf) throws ServletException { super.init(conf); } public void doGet (HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException { doPost(req, res); } protected void sendErrorRedirect(HttpServletRequest request, HttpServletResponse response, Throwable t) { // Forwards an exception to the error page. try { request.getSession().setAttribute("jspException", t); response.sendRedirect("/library/error.jsp"); } catch (Exception e) { e.printStackTrace(); } }}
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