updatecategoryservlet.java

jsp + servlete + jdbc开的管理系统

package hbu.david.cmc.servlet;

import hbu.david.cmc.bean.*;
import hbu.david.cmc.work.*;
import hbu.david.cmc.util.*;

import java.io.IOException;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class for Servlet: UpdateCategoryServlet
 * 
 */
public class UpdateCategoryServlet extends hbu.david.cmc.http.MyHttpServlet
		implements javax.servlet.Servlet {
	static final long serialVersionUID = 1L;

	/*
	 * (non-Java-doc)
	 * 
	 * @see javax.servlet.http.HttpServlet#HttpServlet()
	 */
	public UpdateCategoryServlet() {
		super();
	}

	@Override
	public void doExecute(HttpServletRequest request,
			HttpServletResponse response) throws IOException, ServletException {
		// TODO Auto-generated method stub
		int id=ParseRequest.parseInt(request, "id", 0);
		String name=request.getParameter("categoryName");
		String introduce=request.getParameter("categoryIntroduce");
		
		if(StringUtil.isStringEmpty(name)||StringUtil.isStringEmpty(introduce)){
			//request.setAttribute("errorMessage", "不允许有空数据！");
			response.getWriter().print("不允许有空数据！");
			//request.setAttribute("returnUrl", "GotoUpdateCategoryServlet?categoryId="+id);
			//request.getRequestDispatcher("error.jsp").forward(request, response);
		}else{
			Category category=new Category();
			category.setId(id);
			category.setName(name);
			category.setIntroduce(introduce);
			if(CategoryBean.updateCategory(category)){
				response.getWriter().print("更新成功！");
				//request.setAttribute("errorMessage", "更新成功！");
				//request.setAttribute("returnUrl", "GetCategoriesServlet");
				//request.getRequestDispatcher("error.jsp").forward(request, response);
			}else{
				response.getWriter().print("更新失败！");
				//request.setAttribute("errorMessage", "更新失败！");
				//request.setAttribute("returnUrl", "GotoUpdateCategoryServlet?categoryId="+id);
				//request.getRequestDispatcher("error.jsp").forward(request, response);
			}
		}
	}
}