新闻发布项目——Servlet类（doDelNewsServlet ）

package bdqn.newsManageServlet.Servlet;

import java.io.IOException;
import java.io.PrintWriter;

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

import bdqn.newsManageServlet.Dao.newsTbDao;
import bdqn.newsManageServlet.Dao.Impl.newsTbDaoImpl;
import bdqn.newsManageServlet.Service.commentService;
import bdqn.newsManageServlet.Service.Impl.commentServiceImpl;

public class doDelNewsServlet extends HttpServlet {

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/html;charset=utf-8");
		PrintWriter out = response.getWriter();
		request.setCharacterEncoding("utf-8");
		//获取新闻的id
		int newsid=Integer.parseInt(request.getParameter("newsid"));
		//执行删除的操作
		
		//先删除该条新闻下面的评论，直接删掉
		commentService commService=new commentServiceImpl();
		//根据新闻的id删除新闻
		commService.delComment(newsid);
			//删除新闻
			newsTbDao nDao=new newsTbDaoImpl();
			int nrel=nDao.delNewsTb(newsid);
			if(nrel>0){
				out.print("<script>alert('删除新闻成功！');location.href='adminManage/editNews.jsp';</script>");
			}else{
				out.print("<script>alert('删除新闻失败！');location.href='adminManage/editNews.jsp';</script>");
			}
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doGet(request, response);
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}