Servlet is not executing
Question
I have a program that writes new employee information to a text file. I have a project in which I must adapt said program into one that inputs that info into an Oracle database instead. I put in the info and hit the submit button, then nothing happens, not even an error message or thrown exception. I have no idea what is wrong or where to even start looking, and I can admit that I am in a little bit over my head here. I am fairly certain the problem lies with the servlet, somehow. Here is my code:
form.jsp:
<%@page session="false" import="java.util.Iterator"%>
<%-- Retrieve the Status bean from the Request scope --%>
<jsp:useBean id="status" scope="request" class="util.Status"/>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Project 1</title>
</head>
<body>
<h1>Employee Hiring Form</h1>
<%-- Display any errors from previous form submission. --%>
<c:if test="${!status.isSuccessful}">
<font color="red">There were problems processing your request:
<ul>
<c:forEach var="ex" items="${status.exceptions}">
<li>
<c:out value="${ex.message}"></c:out>
</li>
</c:forEach>
</ul>
</font>
</c:if>
<%-- Display the form to enter a new hire. --%>
<form action="C:\Users\Nelle\Documents\NetBeansProjects\EmployeeDB\src\java\web\HiringServlet" method="POST">
<label for="department"><strong>Department</strong></label><br />
<select name="department">
<%String department = request.getParameter("department"); if (department == null) {department = "";}%>
<option value="unknown" <%if(department.equals("unknown")){out.print(" selected");}%>>Select a department...</s:option>
<option value="Human Resources" <%if(department.equals("Human Resources")){out.print(" selected");}%>>Human Resources</s:option>
<option value="Software Development" <%if(department.equals("Software Development")){out.print(" selected");}%>>Software Development</s:option>
<option value="Media Relations" <%if(department.equals("Media Relations")){out.print(" selected");}%>>Media Relations</s:option>
</select><br /><br />
<%String name = request.getParameter("name");if (name==null) name="";%>
<label for="name"><strong>Employee Name</strong></label><br />
<input type="text" name="name" value="<%=name%>" /><br /><br />
<%String jobTitle = request.getParameter("jobTitle");if (jobTitle == null) jobTitle = "";%>
<label for="jobTitle"><strong>Job Title</strong></label><br />
<input type="text" name="jobTitle" value="<%=jobTitle%>" /><br /><br />
<%String yearHired = request.getParameter("yearHired");if (yearHired == null) yearHired = "";%>
<label for="yearHired"><strong>Year Hired</strong></label><br />
<input type="text" name="yearHired" value="<%=yearHired%>" /><br /><br />
<%String gender = request.getParameter("gender");if (gender == null) gender = "";%>
<label for="gender"><strong>Gender</strong></label><br />
<input type="text" name="gender" value="<%=gender%>" /><br /><br />
<input type="submit" value="Add Employee" /> <input type="reset" value="Reset" />
</form>
</body>
</html>
confirmation.jsp:
<jsp:useBean id="department" scope="request" class="domain.Department"/>
<jsp:useBean id="employee" scope="request" class="domain.Employee"/>
<jsp:useBean id="hiringList" scope="request" class="java.util.ArrayList"/>
<%@page contentType="text/html" pageEncoding="UTF-8" session="false" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Project 1</title>
</head>
<body>
<h1>New Hire Successfully Added</h1>
<p>
<strong>Employee Information</strong><br /><br />
Name: <jsp:getProperty name="employee" property="name"/><br />
Job Title: <jsp:getProperty name="employee" property="jobTitle"/><br />
Year Hired: <jsp:getProperty name="employee" property="yearHired"/><br />
Gender: <jsp:getProperty name="employee" property="gender"/><br /><br />
Added to department: <jsp:getProperty name="department" property="name"/><br />
</p>
<form action="form.jsp" method="POST" style="margin-bottom:25px;">
<input type="submit" value="Add Another Employee" name="more" />
</form>
<hr />
<h2>Complete Employee List</h2>
<table>
<tr><td>Name</td><td>Job Title</td><td>Year Hired</td><td>Gender</td> <td>Department</td><td>Department Description</td></tr>
<c:forEach var="hire" items="${hiringList}">
<tr>
<td style="border:1px solid #ccc;padding:0 15px 0 5px;"><c:out value="${hire.getEmployee().getName()}"></c:out></td>
<td style="border:1px solid #ccc;padding:0 15px 0 5px;"><c:out value="${hire.getEmployee().getJobTitle()}"></c:out></td>
<td style="border:1px solid #ccc;padding:0 15px 0 5px;"><c:out value="${hire.getEmployee().getYearHired()}"></c:out></td>
<td style="border:1px solid #ccc;padding:0 15px 0 5px;"><c:out value="${hire.getEmployee().getGender()}"></c:out></td>
<td style="border:1px solid #ccc;padding:0 15px 0 5px;"><c:out value="${hire.getDepartment().getName()}"></c:out></td>
<td style="border:1px solid #ccc;padding:0 15px 0 5px;"><c:out value="${hire.getDepartment().getDescription()}"></c:out></td>
</tr>
</c:forEach>
</table>
</body>
</html>
HiringServlet.java:
(imports removed)
public class HiringServlet extends HttpServlet {
public Statement statement;
protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException, SQLException, ClassNotFoundException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
//Declare the dispatcher for the View
RequestDispatcher view = null;
//Create the business logic object
HiringService hs = null;
//Create the Status object and store it in the request
//for use by the 'Registration Form' View (if necessary)
Status status = new Status();
request.setAttribute("status", status);
//Retrieve the HTML form parameters
String departmentName = request.getParameter("department");
String name = request.getParameter("name");
String jobTitle = request.getParameter("jobTitle");
String yearHired = request.getParameter("yearHired");
String gender = request.getParameter("gender");
// Verify form fields data; create Exception objects if data are missing
if (departmentName.equals("unknown"))
status.addException(new Exception("Please select a department. "));
if ((name == null) || (name.length() == 0))
status.addException(new Exception("Please enter the employee name. "));
if ((jobTitle == null) || (jobTitle.length() == 0))
status.addException(new Exception("Please enter the job title. "));
if ((yearHired == null) || (yearHired.length() == 0))
status.addException(new Exception("Please enter the year hired. "));
if ((gender == null) || (gender.length() == 0))
status.addException(new Exception("Please enter the gender. "));
// In case of errors, forward the request back to 'Registration Form'
// View and return without proceeding with the rest of the business logic.
if(!status.isSuccessful()){
view = request.getRequestDispatcher("form.jsp");
view.forward(request, response);
return;
}
//If no verification errors are found, the Controller
//uses the business services to perform the registration.
try {
// Load the JDBC driver
Class.forName("oracle.jdbc.driver.OracleDriver");
System.out.println("Driver loaded");
// Establish a connection
Connection connection = DriverManager.getConnection ("jdbc:oracle:thin:@nova.umuc.edu:1521:acad", "username", "password");
System.out.println("Database connected");
// Create a statement
statement = connection.createStatement();
hs = new HiringService();
// Retrieve the department object and verify that it exists.
Department department = hs.getDepartment(departmentName);
if (department == null) throw new Exception("The department you have "+
" selected does not yet exist; please select another one.");
//Create and populate the employee object
Employee employee = hs.createEmployee(
name, jobTitle, yearHired, gender);
//Delegate hiring to the HiringService object.
Hiring newHire = new Hiring(employee, department);
hs.hire(newHire);
ArrayList hiringList = hs.getHirings();
request.setAttribute( "department", department);
request.setAttribute( "employee", employee);
request.setAttribute( "hiringList", hiringList);
// Select the next View for the user in case hiring is
// successful Forward to the confirmation.jsp View
view = request.getRequestDispatcher("/confirmation.jsp");
view.forward(request,response);
}
catch (Exception ex){
status.addException(ex);
//Select next View.
//Exceptions are caught, forward back to the form.jsp View.
view = request.getRequestDispatcher("/form.jsp");
view.forward(request,response);
}
finally {
out.close();
}
}
}
If you need to see any of my other .java documents, let me know and I'll post them, but I don't think they're the problem.
2 answers
solution1
0 2013-12-02 00:32:31
I would start from here
<form action="C:\Users\Nelle\Documents\NetBeansProjects\EmployeeDB\src\java\web\HiringServlet" method="POST">
Do you have any clue about your HiringServlet being called?
solution2
0 2013-12-02 06:42:32
Configure the Servlet in web.xml and give the url pattern in "form" tag in "action" attribute.
Look at the link.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.
Related Question
jQuery not executing servlet doGet
Issues with executing Servlet Events
synchronized block not executing in servlet
Error executing a servlet
Error executing a servlet from eclipse
error while executing servlet programs
JSP servlet not executing doPost method
Uncaught initialization exception created by servlet, when executing a servlet on RAD
Executing MySQL Commands from a Java Servlet
Wrong result in executing oracle query from servlet
Related Tags