MyJavawebProject/src/com/servlet/UpdateServlet.java

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package com.servlet;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.dao.StuDao;
import com.dao.StuDaoImpl;

/**
 * Servlet implementation class UpdateServlet
 */
@WebServlet("/UpdateServlet")
public class UpdateServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doPost(request, response);
	}
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		
		String id = request.getParameter("id");
		int userId = Integer.parseInt(id);
		
		String name = request.getParameter("name");
		String pwd = request.getParameter("pwd");
		String sex = request.getParameter("sex");
		String home = request.getParameter("home");
		String grades = request.getParameter("grades");
		String info = request.getParameter("info");
		
		System.out.println("------------------------------------"+userId);
		
		StuDao ud = new StuDaoImpl();//数据库的操作对象
		if(ud.update(userId, name, pwd, sex, home, grades,info)){
			request.setAttribute("message", "更新成功");
			request.getRequestDispatcher("/SearchallServlet").forward(request, response);
		}else{
			response.sendRedirect("error.jsp");
		}
	}
}