package service; import imp.UserDaoImp; 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.UserDao; import bean.User; public class user_update extends HttpServlet { /** * Constructor of the object. */ public user_update() { super(); } /** * 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("textml"); PrintWriter out = response.getWriter(); out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">"); out.println("<HTML>"); out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>"); out.println(" <BODY>"); out.print(" This is "); out.print(this.getClass()); out.println(", using the GET method"); out.println(" </BODY>"); out.println("</HTML>"); out.flush(); out.close(); } /** * 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 { response.setContentType("textml"); request.setCharacterEncoding("utf-8"); response.setCharacterEncoding("utf-8"); String uid = request.getParameter("uid"); String uname = request.getParameter("uname"); String uclass = request.getParameter("uclass"); String upassword = request.getParameter("upassword"); User user = new User(); user.setuName(uname); user.setuClass(uclass); user.setuPassword(upassword); UserDao userdao = new UserDaoImp(); int result = userdao.updateInfo(uid, user); if (result > 0) { PrintWriter out = response.getWriter(); out.print("<script type='text/javascript'>" + "alert('修改成功');window.location.href='../user_home.jsp';</script>"); out.flush(); out.close(); } else { PrintWriter out = response.getWriter(); out.print("<script type='text/javascript'>" + "alert('修改失败');window.location.href='../user_update.jsp';</script>"); out.flush(); out.close(); } } /** * Initialization of the servlet. <br> * * @throws ServletException if an error occurs */ public void init() throws ServletException { // Put your code here } }
1.这段代码有点长，并且有没有注释；