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
  }
}