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Java JavaScript 前端工具

AquanGeek 2017-08-27 19:07:51

<%@?page?language="java"?import="java.util.*,java.text.*"?contentType="text/html;?charset=utf-8"%> <% String?path?=?request.getContextPath(); String?basePath?=?request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE?HTML?PUBLIC?"-//W3C//DTD?HTML?4.01?Transitional//EN"> <html> ??<head> ????<base?href="<%=basePath%>"> ???? ????<title>My?JSP?'userinfo.jsp'?starting?page</title> ???? ?<meta?http-equiv="pragma"?content="no-cache"> ?<meta?http-equiv="cache-control"?content="no-cache"> ?<meta?http-equiv="expires"?content="0">???? ?<meta?http-equiv="keywords"?content="keyword1,keyword2,keyword3"> ?<meta?http-equiv="description"?content="This?is?my?page"> ? ????<style?type="text/css"> ??.title{ ???width:?30%;? ???background-color:?#CCC; ???font-weight:?bold; ??} ??.content{ ??????width:70%; ??????background-color:?#CBCFE5; ??} ?? ???</style>?? ??</head> ?? ??<body> ????<h1>用戶信息</h1> ????<hr> ????<center> ?????<jsp:useBean??id="regUser"?class="entity.Users"?scope="session"/>??? ?????<table?width="600"?cellpadding="0"?cellspacing="0"?border="1"> ????????<tr> ??????????<td?class="title">用戶名：</td> ??????????<td?class="content"> <jsp:getProperty?name="regUser"?property="username"/></td> ????????</tr> ????????<tr> ??????????<td?class="title">密碼：</td> ??????????<td?class="content"> <jsp:getProperty?name="regUser"?property="mypassword"/></td> ????????</tr> ????????<tr> ??????????<td?class="title">性別：</td> ??????????<td?class="content"> <jsp:getProperty?name="regUser"?property="gender"/></td> ????????</tr> ????????<tr> ??????????<td?class="title">E-mail：</td> ??????????<td?class="content"> <jsp:getProperty?name="regUser"?property="email"/></td> ????????</tr> ????????<tr> ??????????<td?class="title">出生日期：</td> ??????????<td?class="content">  ????????????<%? ???????????????SimpleDateFormat?sdf?=?new?SimpleDateFormat("yyyy年MM月dd日"); ???????????????String?date?=?sdf.format(regUser.getBirthday()); ??????????????? ????????????%> ?????????????<%=date%> ??????????</td> ????????</tr> ????????<tr> ??????????<td?class="title">愛好：</td> ??????????<td?class="content">  ????????????<%? ???????????????String[]?favorites?=?regUser.getFavorites(); ???????????????for(String?f:favorites) ???????????????{ ????????????%> ????????????????<%=f%>?   ????????????<%? ???????????????} ????????????%> ??????????</td> ????????</tr> ????????<tr> ??????????<td?class="title">自我介紹：</td> ??????????<td?class="content"> <jsp:getProperty?name="regUser"?property="introduce"/></td> ????????</tr> ????????<tr> ??????????<td?class="title">是否介紹協(xié)議：</td> ??????????<td?class="content"> <jsp:getProperty?name="regUser"?property="flag"/></td> ????????</tr> ?????</table> ????</center> ??</body> </html>package?servlet; import?java.io.IOException; import?java.text.SimpleDateFormat; import?java.util.Date; import?javax.servlet.ServletException; import?javax.servlet.http.HttpServlet; import?javax.servlet.http.HttpServletRequest; import?javax.servlet.http.HttpServletResponse; import?entity.Users; public?class?RegServlet?extends?HttpServlet?{ ?/** ???*?Constructor?of?the?object. ???*/ ?public?RegServlet()?{ ??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?{ ??doPost(request,?response); ?? ?} ?/** ???*?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?{ ??request.setCharacterEncoding("utf-8"); ?? ??Users?u?=?new?Users(); ??String?username; ??String?mypassword; ??String?gender; ??String?email; ??String?introduce; ??String?isAccept; ??Date?birthday; ??String[]?favorites; ?? ??SimpleDateFormat?sdf?=?new?SimpleDateFormat("yyyy-MM-dd"); ?? ??try?{ ???username?=?request.getParameter("username"); ???mypassword?=?request.getParameter("mypassword"); ???gender?=?request.getParameter("gender"); ???email?=?request.getParameter("email"); ???introduce?=?request.getParameter("introduce"); ???if?(request.getParameterValues("isAccept")!=null)?{ ????isAccept?=?request.getParameter("isAccept"); ???}else?{ ????isAccept?=?"false"; ???} ???birthday?=?sdf.parse(request.getParameter("birthday")); ???//用來獲取多個(gè)復(fù)選按鈕的值 ???favorites?=?request.getParameterValues("favorites"); ???u.setUsername(username); ???u.setMypassword(mypassword); ???u.setGender(gender); ???u.setEmail(email); ???u.setIntroduce(introduce); ???if?(isAccept.equals("true"))?{ ????u.setFlag(true); ???}else?{ ????u.setFlag(false); ???} ???u.setBirthday(birthday); ???u.setFavorites(favorites); ??? ???//把注冊成功的用戶對象保存到session中 ???request.getSession().setAttribute("regUser",?u); ???//跳轉(zhuǎn)到注冊成功頁面 ???request.getRequestDispatcher("../userinfo.jsp").forward(request,response); ??? ??}?catch(Exception?ex){ ???ex.printStackTrace(); ??} ?? ?} ?/** ???*?Initialization?of?the?servlet.?<br> ???* ???*?@throws?ServletException?if?an?error?occurs ???*/ ?public?void?init()?throws?ServletException?{ ??//?Put?your?code?here ?} }package servlet;import java.io.IOException;import java.text.SimpleDateFormat;import java.util.Date;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import entity.Users;public class RegServlet extends HttpServlet { /**?? * Constructor of the object.?? */ public RegServlet() {? 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 {? doPost(request, response);? } /**?? * 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 {? request.setCharacterEncoding("utf-8");? ? Users u = new Users();? String username;? String mypassword;? String gender;? String email;? String introduce;? String isAccept;? Date birthday;? String[] favorites;? ? SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");? ? try {?? username = request.getParameter("username");?? mypassword = request.getParameter("mypassword");?? gender = request.getParameter("gender");?? email = request.getParameter("email");?? introduce = request.getParameter("introduce");?? if (request.getParameterValues("isAccept")!=null) {??? isAccept = request.getParameter("isAccept");?? }else {??? isAccept = "false";?? }?? birthday = sdf.parse(request.getParameter("birthday"));?? //用來獲取多個(gè)復(fù)選按鈕的值?? favorites = request.getParameterValues("favorites");?? u.setUsername(username);?? u.setMypassword(mypassword);?? u.setGender(gender);?? u.setEmail(email);?? u.setIntroduce(introduce);?? if (isAccept.equals("true")) {??? u.setFlag(true);?? }else {??? u.setFlag(false);?? }?? u.setBirthday(birthday);?? u.setFavorites(favorites);?? ?? //把注冊成功的用戶對象保存到session中?? request.getSession().setAttribute("regUser", u);?? //跳轉(zhuǎn)到注冊成功頁面?? request.getRequestDispatcher("../userinfo.jsp").forward(request,response);?? ? } catch(Exception ex){?? ex.printStackTrace();? }? } /**?? * Initialization of the servlet. <br>?? *?? * @throws ServletException if an error occurs?? */ public void init() throws ServletException {? // Put your code here }}這樣怎么解決空指針？

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