Error while uploading files in database through plugin

I am getting error after navigating to servlet url is that 

java.lang.IllegalStateException: Unable to process parts as no multi-part configuration has been provided

I correctly written servlet url in .xml file


public class CourseSchedule extends HttpServlet
private TemplateRenderer tr;
private PageBuilderService pbs;
private ActiveObjects ao;

public CourseSchedule(TemplateRenderer tr, PageBuilderService pbs,ActiveObjects ao)

protected void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException

tr.render("/templates/adminOperations/courseSchedule.vm", response.getWriter());

Connection con=null;
Statement st=null;
String msg=null;
String url="jdbc:mysql://localhost:3306/LU_Data?useSSL=false";
String user="root";
String password="123456";

Random rand = new Random();
int n = rand.nextInt(9999) + 1;
String idTemp=(String.valueOf(n));

String semesterName=request.getParameter("semesterName");
Part part=request.getPart("scheduleFile");

PrintWriter pw=response.getWriter();

InputStream is=null;

if(part != null)
long fileSize=part.getSize();
String fileContent=part.getContentType();


con=DriverManager.getConnection(url, user, password);

PreparedStatement pst=con.prepareStatement("INSERT INTO Course_schedule VALUES(?,?,?)");
pst.setString(1, semesterName);
pst.setString(2, idTemp);


pst.setBinaryStream(3, is, (int) part.getSize());

int row=pst.executeUpdate();

pw.print("Error in Uploading a file");
pw.print("File Uploaded Successfully");


catch(SQLException e)
} catch (ClassNotFoundException e)
if(con!= null)
try {
}catch(SQLException e) {e.printStackTrace();}


<title>Course Schedule</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<h1>Upload Course Schedule</h1>
<form action="CourseSchedule" method="post" enctype="multipart/form-data">
<table border="0">
<td>Semester Name</td>
<td><input type="text" name="semesterName" size="50"/></td>
<td>Course Schedule File </td>
<td><input type="file" name="scheduleFile" size="50"/></td>
<td colspan="2">
<input type="submit" value="Upload">


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