controller.java

网上银行EJB版本

package mypackage;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.IOException;

public class Controller extends HttpServlet 
{
  private static final String CONTENT_TYPE = "text/html; charset=GBK";
  private ServletContext ctx;

  public void init(ServletConfig config) throws ServletException
  {
    super.init(config);
    ctx = config.getServletContext();
  }

  public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
  {
    response.setContentType(CONTENT_TYPE);
    request.setCharacterEncoding("GBK");
    String task = request.getParameter("task");
    
    if(task == null)
      ctx.getRequestDispatcher("/index.jsp").forward(request, response);
    if(task.compareTo("regist") == 0)
      ctx.getRequestDispatcher("/regist.jsp").forward(request, response);
    if(task.compareTo("doRegist") == 0)
      ctx.getNamedDispatcher("Regist").forward(request, response);
    if(task.compareTo("validate") == 0)
      ctx.getNamedDispatcher("Validate").forward(request, response);
    if(request.getSession().getAttribute("accounts") == null)
      ctx.getRequestDispatcher("/nologin.jsp").forward(request, response);
    if(task.compareTo("logout") == 0)
      ctx.getNamedDispatcher("Logout").forward(request, response);
    if(task.compareTo("queryBalance") == 0)
      ctx.getNamedDispatcher("QueryBalance").forward(request, response);
    if(task.compareTo("queryTransaction") == 0)
      ctx.getNamedDispatcher("QueryTransaction").forward(request, response);
    if(task.compareTo("transfer") == 0)
      ctx.getRequestDispatcher("/transfer.jsp").forward(request, response);
    if(task.compareTo("doTransfer") == 0)
      ctx.getNamedDispatcher("Transfer").forward(request, response);
    if(task.compareTo("modifyPassword") == 0)
      ctx.getRequestDispatcher("/modifypassword.jsp").forward(request, response);
    if(task.compareTo("doModifyPassword") == 0)
      ctx.getNamedDispatcher("ModifyPassword").forward(request, response);
    if(task.compareTo("dealMiss") == 0)
      ctx.getRequestDispatcher("/dealmiss.jsp").forward(request, response);
    if(task.compareTo("miss") == 0)
      ctx.getNamedDispatcher("MissCard").forward(request, response);
  }
}