public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String dbUser = "******"; // enter your username here
String dbPassword = "******"; // enter your password here
try {
OracleDataSource ods = new oracle.jdbc.pool.OracleDataSource();
ods.setURL("jdbc:oracle:thin:@//w4111b.cs.columbia.edu:1521/ADB");
ods.setUser(dbUser);
ods.setPassword(dbPassword);
Connection conn = ods.getConnection();
String query = new String();
Statement s = conn.createStatement();
query = "select * from events";
ResultSet r = s.executeQuery(query);
while (r.next()) {
out.println("Today's Date: " + r.getString(1) + " ");
}
r.close();
s.close();
conn.close();
} catch (Exception e) {
out.println("The database could not be accessed.<br>");
out.println("More information is available as follows:<br>");
e.printStackTrace(out);
}
} // end doGet method
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// Variable initializations.
HttpSession session = request.getSession();
FileItem image_file = null;
int record_id = 0;
int image_id;
// Check if a record ID has been entered.
if (request.getParameter("recordID") == null || request.getParameter("recordID").equals("")) {
// If no ID has been entered, send message to jsp.
response_message =
"<p><font color=FF0000>No Record ID Detected, Please Enter One.</font></p>";
session.setAttribute("msg", response_message);
response.sendRedirect("UploadImage.jsp");
}
try {
// Parse the HTTP request to get the image stream.
DiskFileUpload fu = new DiskFileUpload();
// Will get multiple image files if that happens and can be accessed through FileItems.
List<FileItem> FileItems = fu.parseRequest(request);
// Connect to the database and create a statement.
conn = getConnected(drivername, dbstring, username, password);
stmt = conn.createStatement();
// Process the uploaded items, assuming only 1 image file uploaded.
Iterator<FileItem> i = FileItems.iterator();
while (i.hasNext()) {
FileItem item = (FileItem) i.next();
// Test if item is a form field and matches recordID.
if (item.isFormField()) {
if (item.getFieldName().equals("recordID")) {
// Covert record id from string to integer.
record_id = Integer.parseInt(item.getString());
String sql = "select count(*) from radiology_record where record_id = " + record_id;
int count = 0;
try {
rset = stmt.executeQuery(sql);
while (rset != null && rset.next()) {
count = (rset.getInt(1));
}
} catch (SQLException e) {
response_message = e.getMessage();
}
// Check if recordID is in the database.
if (count == 0) {
// Invalid recordID, send message to jsp.
response_message =
"<p><font color=FF0000>Record ID Does Not Exist In Database.</font></p>";
session.setAttribute("msg", response_message);
// Close connection.
conn.close();
response.sendRedirect("UploadImage.jsp");
}
}
} else {
image_file = item;
if (image_file.getName().equals("")) {
// No file, send message to jsp.
response_message = "<p><font color=FF0000>No File Selected For Record ID.</font></p>";
session.setAttribute("msg", response_message);
// Close connection.
conn.close();
response.sendRedirect("UploadImage.jsp");
}
}
}
// Get the image stream.
InputStream instream = image_file.getInputStream();
BufferedImage full_image = ImageIO.read(instream);
BufferedImage thumbnail = shrink(full_image, 10);
BufferedImage regular_image = shrink(full_image, 5);
// First, to generate a unique img_id using an SQL sequence.
rset1 = stmt.executeQuery("SELECT image_id_sequence.nextval from dual");
rset1.next();
image_id = rset1.getInt(1);
// Insert an empty blob into the table first. Note that you have to
// use the Oracle specific function empty_blob() to create an empty blob.
stmt.execute(
"INSERT INTO pacs_images VALUES("
+ record_id
+ ","
+ image_id
+ ", empty_blob(), empty_blob(), empty_blob())");
// to retrieve the lob_locator
// Note that you must use "FOR UPDATE" in the select statement
String cmd = "SELECT * FROM pacs_images WHERE image_id = " + image_id + " FOR UPDATE";
rset = stmt.executeQuery(cmd);
rset.next();
BLOB myblobFull = ((OracleResultSet) rset).getBLOB(5);
BLOB myblobThumb = ((OracleResultSet) rset).getBLOB(3);
BLOB myblobRegular = ((OracleResultSet) rset).getBLOB(4);
// Write the full size image to the blob object.
OutputStream fullOutstream = myblobFull.getBinaryOutputStream();
ImageIO.write(full_image, "jpg", fullOutstream);
// Write the thumbnail size image to the blob object.
OutputStream thumbOutstream = myblobThumb.getBinaryOutputStream();
ImageIO.write(thumbnail, "jpg", thumbOutstream);
// Write the regular size image to the blob object.
OutputStream regularOutstream = myblobRegular.getBinaryOutputStream();
ImageIO.write(regular_image, "jpg", regularOutstream);
// Commit the changes to database.
stmt.executeUpdate("commit");
response_message = "<p><font color=00CC00>Upload Successful.</font></p>";
session.setAttribute("msg", response_message);
instream.close();
fullOutstream.close();
thumbOutstream.close();
regularOutstream.close();
// Close connection.
conn.close();
response.sendRedirect("UploadImage.jsp");
instream.close();
fullOutstream.close();
thumbOutstream.close();
regularOutstream.close();
// Close connection.
conn.close();
} catch (Exception ex) {
response_message = ex.getMessage();
}
}