Don't work servlet. Issue with servlet mapping in web.xml
Question
I have home page and when I click on reference Servlet don't work and I get error 404. I think issue in web.xml mapping, but a don't understand where. Please help me correct this issue. Thank you.
My web.xml
<!--Homepage.-->
<servlet>
<servlet-name>HomePageServlet</servlet-name>
<servlet-class>ru.pravvich.servlets.HomePageServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>HomePageServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--Add user in database.-->
<servlet>
<servlet-name>AddUserServlet</servlet-name>
<servlet-class>ru.pravvich.servlets.AddUserServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>AddUserServlet</servlet-name>
<url-pattern>/addition</url-pattern>
</servlet-mapping>
My jsp homepage:
<body>
<ul>
<li><a href="addition.jsp">addition</a></li>
</ul>
</body>
And servlet with doGet method for it:
public class HomePageServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
req.setCharacterEncoding("UTF8");
req.getRequestDispatcher("/WEB-INF/views/index.jsp").forward(req,resp);
}
}
And by http://localhost:8080/items/ I get my home page.
But, when I click on reference from index.jsp , return: HTTP Status [404] – [Not Found]
My addition.jsp same lie in /WEB-INF/views/addition.jsp
My Servlet for work with addition.jsp :
public class AddUserServlet extends HttpServlet {
private DBJoint db;
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
db = (DBJoint) getServletContext().getAttribute("db");
db.getDBExecutor().addUser(
new User(req.getParameter("name"),
req.getParameter("login"),
req.getParameter("email")));
req.setAttribute("serverAnswer", "Add ok!");
req.getRequestDispatcher("/WEB-INF/views/answer.jsp").forward(req, resp);
}
}
And addition.jsp :
<body>
<form method="post" action="addition">
<input type="text" required placeholder="name" name="name"><br>
<input type="text" required placeholder="login" name="login"><br>
<input type="text" required placeholder="email" name="email"><br>
<input type="submit" value="add">
</form>
</body>
1 answers
solution1
0 ACCPTED 2017-06-06 00:32:54
I would suggest to use try/catch and debugger mode.
And try to use like this your getRequestDispatcher
request.getRequestDispatcher("answer.jsp").forward(request, response);
or
req.getRequestDispatcher("~/WEB-INF/views/answer.jsp").forward(req, resp);
I think you need to get parameter for each of one, and than set. Try this;
public class AddUserServlet extends HttpServlet {
private DBJoint db;
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
db = (DBJoint) getServletContext().getAttribute("db");
String Name = request.getParameter("name");
String Login= request.getParameter("login");
String Email= request.getParameter("email");
db.getDBExecutor().addUser(
new User(Name, Login, Email);
//And you need to 'serverAnswer' item in your 'answer.jsp' you know.
request.setAttribute("serverAnswer", "Add ok!");
request.getRequestDispatcher("answer.jsp").forward(req, resp);
}
}
And then you can use getAttribute like this in your answer.jsp ,
<%String Answer= (String)request.getAttribute("serverAnswer"); %><%= Answer%>
Don't blame me, just i wanna help to you, i hope so it can be help to you, if you wanna you can look my trial project; https://github.com/anymaa/GNOHesap
Have a nice coding :)
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