In the process of developing a JSP bulletin board, I’m encountering a 404 error despite verifying that there are no syntax errors. I encountered an error while implementing the writing functionality. I’ll upload the codes for write.jsp and writeAction.jsp.
/*write.jsp*/
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import="java.io.PrintWriter"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<link
href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css"
rel="stylesheet"
integrity="sha384-QWTKZyjpPEjISv5WaRU9OFeRpok6YctnYmDr5pNlyT2bRjXh0JMhjY6hW+ALEwIH"
crossorigin="anonymous">
<title>Insert title here</title>
</head>
<body>
<%
String userID = null;
if (session.getAttribute("userID")!=null){
userID=(String)session.getAttribute("userID");
}
%>
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<div class="container-fluid">
<a class="navbar-brand" href="main.jsp">Green Garden</a>
<button class="navbar-toggler" type="button"
data-bs-toggle="collapse" data-bs-target="#navbarNav"
aria-controls="navbarNav" aria-expanded="false"
aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarNav">
<ul class="navbar-nav me-auto mb-2 mb-lg-0">
<li class="nav-item"><a class="nav-link active"
aria-current="page" href="main.jsp">Home</a></li>
<li class="nav-item"><a class="nav-link" href="main.jsp">List</a>
</li>
</ul>
<%
if (userID == null) {
%>
<ul class="navbar-nav ms-auto">
<li class="nav-item dropdown"><a
class="nav-link dropdown-toggle" href="#" id="navbarDropdown"
role="button" data-bs-toggle="dropdown" aria-expanded="false">member</a>
<ul class="dropdown-menu" aria-labelledby="navbarDropdown">
<li><a class="dropdown-item active" href="login.jsp">sign
in</a></li>
<li><a class="dropdown-item" href="join.jsp">sign up</a></li>
</ul></li>
</ul>
<%
} else {
%>
<ul class="navbar-nav ms-auto">
<li class="nav-item dropdown"><a
class="nav-link dropdown-toggle" href="#" id="navbarDropdown"
role="button" data-bs-toggle="dropdown" aria-expanded="false">member</a>
<ul class="dropdown-menu" aria-labelledby="navbarDropdown">
<li><a class="dropdown-item" href="logoutAction.jsp">sign
out</a></li>
</ul></li>
</ul>
<%
}
%>
</div>
</div>
</nav>
<div class="container">
<div class="row">
<form method="post" action="writeAction.jsp">
<table class="table table-striped"
style="text-align: center; border: 1px solid #dddddd">
<thead>
<tr>
<th colspan="2" style="background-color: #eeeeee; text-align: center;">Community
Board</th>
</tr>
</thead>
<tbody>
<tr>
<td><input type="text" class="form-control"
placeholder="Enter Title" name="bbsTitle" maxlength="50">Summarize your topic in a few words.</td>
</tr>
<tr>
<td><textarea class="form-control"
placeholder="Share your Thoughts... Need Advice? Type your Question..." name="bbsContent" maxlength="2048" style="height: 350px;"></textarea>
</td>
</tr>
</tbody>
</table>
<input type="submit" class="btn btn-primary pull-right" value="Post">
</form>
</div>
</div>
<script
src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js"
integrity="sha384-YvpcrYf0tY3lHB60NNkmXc5s9fDVZLESaAA55NDzOxhy9GkcIdslK1eN7N6jIeHz"
crossorigin="anonymous"></script>
</body>
</html>
/* writeAction.jsp*/
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import="bbs.BbsDAO"%>
<%@ page import="java.io.PrintWriter"%>
<% request.setCharacterEncoding("UTF-8"); %>
<jsp:useBean id="bbs" class="bbs.Bbs" scope="page" />
<jsp:setProperty name="bbs" property="bbsTitle" />
<jsp:setProperty name="bbs" property="bbsContent" />
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>게시판</title>
</head>
<body>
<%
String userID = null;
if(session.getAttribute("userID")!=null){
userID = (String)session.getAttribute("userID");
}
if(userID == null){
PrintWriter script = response.getWriter();
script.println("<script>");
script.println("alert('Please sign in first to continue...')");
script.println("location.href = 'login.jsp'");
script.println("</script>");
} else{
if(bbs.getBbsTitle() == null || bbs.getBbsContent() == null){
PrintWriter script = response.getWriter();
script.println("<script>");
script.println("alert('Please fill in all fields...')");
script.println("history.back()");
script.println("</script>");
}else{
BbsDAO bbsDAO = new BbsDAO();
int result = bbsDAO.write(bbs.getBbsTitle(), userID, bbs.getBbsContent());
if (result == -1){
PrintWriter script = response.getWriter();
script.println("<script>");
script.println("alert('Failed to upload your post')");
script.println("history.back()");
script.println("</script>");
}else{
PrintWriter script = response.getWriter();
script.println("<script>");
script.println("alert('Post successfully submitted!')");
script.println("location.href = 'bbs.jsp'");
script.println("</script>");
}
}
}
%>
</body>
</html>
My file structure is the following:
Here’s what I’ve done so far:
Checked for typos and syntax errors in the JSP files involved in the bulletin board creation.
Verified the file paths and names, ensuring they are correctly specified in the form submission and that the .jsp extension is accurate.
Examined server logs for any additional insights into the error and ensured proper server configuration for handling JSP files.
Confirmed file permissions and web application context, ensuring correct access and execution permissions and handling of URL mappings.
Despite these efforts, the 404 error persists. Any suggestions or insights into resolving this issue would be greatly appreciated.
Dependencies Versions: Java: Amazon Corretto 17 Web Container: Apache Tomcat 9.0.74
Endpoints:
Working Endpoint: /loginAction.jsp
This endpoint processes user login, validates credentials using the UserDAO class, and redirects to main.jsp upon success.
URL: /joinAction.jsp
This endpoint processes user registration and works correctly.
Problematic Endpoint: /writeAction.jsp
This endpoint is intended to create a new post, but it doesn’t work as expected.
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="4.0" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd">
<servlet>
<servlet-name>default</servlet-name>
<servlet-class>org.apache.catalina.servlets.DefaultServlet</servlet-class>
<init-param>
<param-name>debug</param-name>
<param-value>0</param-value>
</init-param>
<init-param>
<param-name>listings</param-name>
<param-value>false</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet>
<servlet-name>jsp</servlet-name>
<servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class>
<init-param>
<param-name>fork</param-name>
<param-value>false</param-value>
</init-param>
<init-param>
<param-name>xpoweredBy</param-name>
<param-value>false</param-value>
</init-param>
<load-on-startup>3</load-on-startup>
</servlet>
<mime-mapping>
<extension>123</extension>
<mime-type>application/vnd.lotus-1-2-3</mime-type>
</mime-mapping>
<mime-mapping>
<extension>3dml</extension>
<mime-type>text/vnd.in3d.3dml</mime-type>
</mime-mapping>
<mime-mapping>
<extension>3ds</extension>
<mime-type>image/x-3ds</mime-type>
</mime-mapping>
<mime-mapping>
<extension>3g2</extension>
<mime-type>video/3gpp2</mime-type>
</mime-mapping>
.....
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
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