新闻发布项目——Servlet类（doRegServlet ）

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.UserDao;
import bdqn.newsManageServlet.Dao.Impl.UserDaoImpl;
import bdqn.newsManageServlet.entity.User;

public class doRegServlet 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");
		//获取注册用户信息
		request.setCharacterEncoding("utf-8");
		String name=request.getParameter("userName");
		String pwd=request.getParameter("password");
		if(name==null||name.equals("")){
		//保存错误信息
			request.setAttribute("uerrmsg","用户名不能为空" );
			request.getRequestDispatcher("reg.jsp").forward(request, response);
			return;
		}else if(pwd==null||pwd.equals("")){
			//保存错误信息
			request.setAttribute("pwderrmsg","密码不能为空" );
			request.getRequestDispatcher("reg.jsp").forward(request, response);
			return;
		}else{
		//将用户信息添加到数据库中
			UserDao udao=new UserDaoImpl();
			User user=new User();
			user.setUserName(name);
			user.setUserPassword(pwd);
			int rel=udao.addUser(user);
			if(rel>0){
				out.print("<script>alert('注册成功！');location.href='./index.jsp';</script>");
			}else{
				out.print("<script>alert('注册失败！');location.href='./reg.jsp';</script>");
			}
		}
	}

	
	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
	}

}