pettypeservlet.java

网上购物系统

package Control_PetType;
import Model_PetType.PetType;
import Model_PetType.PetTypeBean;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.PrintWriter;
import java.io.IOException;

public class PetTypeServlet extends HttpServlet 
{
  private static final String CONTENT_TYPE = "text/html; charset=GB2312";

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

  public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
  {
    response.setContentType(CONTENT_TYPE);
    request.setCharacterEncoding("GB2312");
    this.doPost(request,response);
  }

  public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
  {
    response.setContentType(CONTENT_TYPE);
    PrintWriter out = response.getWriter();
    request.setCharacterEncoding("GB2312");
    String action=request.getParameter("action");
    
    if(action!=null)
    {
      if (action.equals("add"))
      {
        PetType pt=new PetType();
        pt.setPetTypeId(request.getParameter("TypeID"));
        pt.setPetTypeName(request.getParameter("TypeName"));
        PetTypeBean ptb=new PetTypeBean();
       
        boolean b=ptb.InsertPetType(pt);
        try
        {
        if(b)
        {
          response.sendRedirect("PetType.jsp");
        }
        else
        {
          response.sendRedirect("Error.jsp");
        }
        }
        catch(Exception e)
        {
          out.println("error"+e.getMessage());
        }
      }
      else if (action.equals("update"))
      {
        PetType pt=new PetType();
        pt.setPetTypeId(request.getParameter("TypeID"));
        pt.setPetTypeName(request.getParameter("TypeName"));
        PetTypeBean ptb=new PetTypeBean();
        
        String b=ptb.UpdatePetType(pt);
        try
        {
        if(b.equals("修改成功"))
        {
          response.sendRedirect("PetType.jsp");
        }
        else
        {
          response.sendRedirect("Error.jsp");
        }
        }
        catch(Exception e)
        {
          out.println("error"+e.getMessage());
        }
      }
      else if (action.equals("delete"))
      {
        PetType pt=new PetType();
        pt.setPetTypeId(request.getParameter("TypeID"));
        PetTypeBean ptb=new PetTypeBean();
        
        String b=ptb.DeletePetType(pt.getPetTypeId());
        try
        {
        if(b.equals("删除成功"))
        {
          response.sendRedirect("PetType.jsp");
        }
        else
        {
          response.sendRedirect("Error.jsp");
        }
        }
        catch(Exception e)
        {
          out.println("error"+e.getMessage());
        }
      }
    }
    out.close();
  }
}