jsp servlet Etat HTTP 404 [重复]
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【中文标题】jsp servlet Etat HTTP 404 [重复]【英文标题】:jsp servlet Etat HTTP 404 [duplicate] 【发布时间】:2018-05-16 14:59:12 【问题描述】:我在编程时遇到了这个问题:
Etat HTTP 404 - /IT/UserServlet
键入报告d''état
消息 /IT/UserServlet
description La ressource demandée n''est pas disponible.
Apache Tomcat/8.0.27
这是我的代码: register.jsp
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Register Page</title>
<script src="https://s.codepen.io/assets/libs/modernizr.js" type="text/javascript"></script>
<link rel="stylesheet" href="css/register_style.css">
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function ()
var x_timer;
$("#username").keyup(function (e)
clearTimeout(x_timer);
var user_name = $(this).val();
x_timer = setTimeout(function ()
check_username_ajax(user_name);
, 1000);
);
function check_username_ajax(username)
$("#user-result").html('<img src="img/ajax-loader.gif" />');
$.post('CheckUserNameServlet', 'username': username, function (data)
$("#user-result").html(data);
);
);
</script>
</head>
<body>
<form action="UserServlet" method="POST">
<h1>Sign up</h1><br/>
<span class="input"></span>
<input type="text" name="name" id = "name" placeholder="Full name" autofocus autocomplete="off" />
<span class="input" ></span>
<input type="text" name="username" id="username" placeholder="username" />
<span id = "user-result"></span>
<span id="passwordMeter"></span>
<input type="password" name="password" id="password" placeholder="Password" title="Password min 8 characters. At least one UPPERCASE and one lowercase letter" required pattern="(?=^.8,$)(?=.*[a-z])(?=.*[A-Z])(?!.*\s).*$"/>
<input type="hidden" value="insert" name="command">
<button type="submit" value="Sign Up" title="Submit form" class="icon-arrow-right"><span>Sign up</span></button>
</form>
</body>
这是 sevlet:
public class UserServlet extends HttpServlet
UserDAO userDao = new UserDAO();
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
//processRequest(request, response);
String command = request.getParameter("command");
String url="";
switch(command)
case"insert":
User user = new User();
user.setUserId(new Date().getTime());
user.setName(request.getParameter("name"));
user.setUserName(request.getParameter("username"));
user.setPassword(request.getParameter("password"));
user.setCreateTime(Date.from(Instant.now()));
user.setUpdateTime(Date.from(Instant.now()));
userDao.InsertUser(user);
HttpSession session = request.getSession();
session.setAttribute("user", user);
url = "index.jsp";
break;
RequestDispatcher rd = getServletContext().getRequestDispatcher(url);
rd.forward(request, response);
这是 UseDAO:
public boolean InsertUser(User u)
Connection conn = Connect.getConnecttion();
String insert_user = "INSERT INTO user(name, user_name, password, role, create_time, update_time) values(?,?,?,?,?,?)";
try
PreparedStatement ps = conn.prepareStatement(insert_user);
ps.setString(1, u.getName());
ps.setString(2, u.getUserName());
ps.setString(3, u.getPassword());
ps.setInt(4, 4);
ps.setDate(5, Date.valueOf(LocalDate.now()));
ps.setDate(6, Date.valueOf(LocalDate.now()));
ps.executeUpdate();
return true;
catch (SQLException ex)
Logger.getLogger(UserDAO.class.getName()).log(Level.SEVERE, null, ex);
return false;
我的 web.xml:
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<servlet>
<servlet-name>LoginServlet</servlet-name>
<servlet-class>Controller.UserServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>CheckUserNameServlet</servlet-name>
<servlet-class>Controller.CheckUserNameServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>LoginServlet</servlet-name>
<url-pattern>/LoginServlet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>CheckUserNameServlet</servlet-name>
<url-pattern>/CheckUserNameServlet</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
</web-app>
当我运行测试 register.jsp 并显示错误但我不知道在哪里,所以请帮忙!
【问题讨论】:
404 表示未找到,因此很可能是 URL 配置的问题。附加 web.xml 文件,因为在那里配置了 URI。 【参考方案1】:根据添加的 web.xml,您已将 URL 映射到 /LoginServlet
,而不是您尝试访问的 /UserServlet
。
还要确保上下文路径 (/IT
) 在您的服务器中是正确的。
【讨论】:
哦,我可以通过创建新的 servlet 并将 userservlet 粘贴到新的 servlet 来运行它 @NguyễnMạnhCường 那么解决了吗? 是的,我从您的回答中意识到了这一点,感谢您的帮助以上是关于jsp servlet Etat HTTP 404 [重复]的主要内容,如果未能解决你的问题,请参考以下文章
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