addservlet.java

jsp+servlet经典的登录注册

package 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 dao.DAO;

public class AddServlet extends HttpServlet {

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		request.setCharacterEncoding("gbk");
		response.setContentType("text/html;charset=gbk");
		PrintWriter out = response.getWriter();
		
		String userName = request.getParameter("userName");
		String passWord = request.getParameter("passWord");
		String sql = "insert into login values(?,?)";
		DAO dao = new DAO();
		int n = dao.AddPerson(sql, userName, passWord);
		if(n == 0){
			out.write("<script type='text/javascript'>alert('增加失败');</script>");
		} else {
			out.write("<script type='text/javascript'>alert('增加成功');</script>");
		}
		//不能用这样的增加有问题出现2个
		
		//request.getRequestDispatcher("/servlet/LoginCheck").include(request, response);
		
		response.sendRedirect("/login/servlet/LoginCheck");
		out.flush();
		out.close();
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		this.doGet(request, response);
	}
}