标题翻译
HTTP method POST is not supported by this URL Java servlet
问题
请问有人可以告诉我为什么我会得到错误：HTTP状态405 - 方法不允许？
我试图在方法doPost()之后实现这样一个功能：用户将被重定向到"/logout"控制器，从而使会话失效。
很有趣，因为方法被调用了，执行了应该执行的所有操作（更新数据库中的用户），但在将错误发送给用户后出现了405错误。另一个我使用doPost()的<form>（例如：LoginController）工作正常，但当我尝试进行比较并查找错误时，我找不到任何问题：
<div class="container">
<div class="col-md-8 col-md-offset-2">
<form method="post" action="account">
<div class="form-group">
<label for="email">电子邮件地址</label>
<input name="email" type="email" class="form-control" id="email"
value="${sessionScope.loggedUser.email}" required aria-describedby="emailHelp"
placeholder="输入电子邮件">
</div>
<div class="form-group">
<label for="password">密码</label>
<input name="password" type="password" minlength="5" maxlength="40" required class="form-control"
id="password" placeholder="密码">
</div>
<div class="form-group">
<label for="repeatPassword">重复密码</label>
<input name="repeatPassword" type="password" minlength="5" maxlength="40" required class="form-control"
id="repeatPassword" placeholder="密码">
</div>
<input class="btn btn-lg btn-primary btn-block" type="submit" value="保存更改"/>
</form>
</div>
</div>
@WebServlet("/account")
public class AccountController extends HttpServlet {
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
String email = req.getParameter("email");
String password = req.getParameter("password");
String repeatPassword = req.getParameter("repeatPassword");
if (email == null || password == null || repeatPassword == null) {
doGet(req, resp);
return;
}
if (password.equals(repeatPassword)) {
HttpSession session = req.getSession();
User user = (User) session.getAttribute("loggedUser");
user.setEmail(email);
String sha1hexPassword = DigestUtils.sha1Hex(password);
user.setPassword(sha1hexPassword);
UserService service = new UserService();
try {
service.update(user);
} catch (UpdateObjectException e) {
e.printStackTrace();
}
req.getRequestDispatcher("/logout").forward(req, resp);
} else {
req.setAttribute("errorMessage", "密码不相同");
req.setAttribute("fragment", "account");
req.getRequestDispatcher("WEB-INF/index.jsp").forward(req, resp);
}
}
}
谢谢任何提示。
英文翻译
Can someone please tell me why i am getting error:HTTP Status 405 – Method Not Allowed ?
I am trying accomplish that after method doPost() ,user will be redirected to "/logout" controller ,where is invalidate session.
It's funny because method is called ,do everything what should do(update user in database), but after send to user error 405.Another <form> where i use doPost() (for example: LoginController) working well ,but when i try compere and find bug ,i dont see any :<
<div class="container">
<div class="col-md-8 col-md-offset-2">
<form method="post" action="account">
<div class="form-group">
<label for="email">Email address</label>
<input name="email" type="email" class="form-control" id="email"
value="${sessionScope.loggedUser.email}" required aria-describedby="emailHelp"
placeholder="Enter email">
</div>
<div class="form-group">
<label for="password">Password</label>
<input name="password" type="password" minlength="5" maxlength="40" required class="form-control"
id="password" placeholder="Password">
</div>
<div class="form-group">
<label for="repeatPassword">Repeat Password</label>
<input name="repeatPassword" type="password" minlength="5" maxlength="40" required class="form-control"
id="repeatPassword" placeholder="Password">
</div>
<input class="btn btn-lg btn-primary btn-block" type="submit" value="Save changes"/>
</form>
</div>
</div>
@WebServlet("/account")
public class AccountController extends HttpServlet {
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
String email = req.getParameter("email");
String password = req.getParameter("password");
String repeatPassword = req.getParameter("repeatPassword");
if (email == null || password == null || repeatPassword == null) {
doGet(req, resp);
return;
}
if (password.equals(repeatPassword)) {
HttpSession session = req.getSession();
User user = (User) session.getAttribute("loggedUser");
user.setEmail(email);
String sha1hexPassword = DigestUtils.sha1Hex(password);
user.setPassword(sha1hexPassword);
UserService service = new UserService();
try {
service.update(user);
} catch (UpdateObjectException e) {
e.printStackTrace();
}
req.getRequestDispatcher("/logout").forward(req, resp);
} else {
req.setAttribute("errorMessage", "Passwords not the same");
req.setAttribute("fragment", "account");
req.getRequestDispatcher("WEB-INF/index.jsp").forward(req, resp);
}
}
}
Thanks for any hint.
答案1
得分: 0
你的doGet()方法调用在服务器的doPost()代码内。你应该重定向响应，doGet用于接收GET请求和任何查询字符串。
英文翻译
Your doGet() method call is inside the server doPost() code. You should redirect the response, doGet is for recieving a GET request and any query string.
答案2
得分: 0
问题已解决。在这里：
req.getRequestDispatcher("/logout").forward(req, resp);
我应该使用：
resp.sendRedirect(req.getContextPath() + "/logout");
因为在 "/logout" 中只有一个 doGet() 方法，如果我使用 getRequestDispatcher()，它会尝试查找 doPost() 方法。
英文翻译
Problem solved. Here:
req.getRequestDispatcher("/logout").forward(req, resp);
i should do
resp.sendRedirect(req.getContextPath()+"/logout");
because in "/logout" i have only doGet() method ,and if i use "getRequestDispatcher()" its try to find doPost() method.
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