Develop Reference

Java program one process per user on Microsoft Server

I receive bug to fix. Somebody write program which call printing document from other app. Jar with this program is on microsoft server for a few users. Problem is when one of user want print and other too in the same moment. Fox example user1 click print and have print preview, at the same moment user2 do the same action and he don't have print preview, because print prieview of document user2 is displayed on screen user1. I don't know where is bug. Maybe main app call the same instance of jar or the use the same process. Here is my code of method which is called when user click print.
public void openCreatedFile() {
String filePath = "file:///" + findNewlyCreatedFile().replace("\\", "/");
try {
if (xContext != null)
System.out.println("Opening file ...");
xMCF = xContext.getServiceManager();
Object oDesktop = xMCF.createInstanceWithContext("com.sun.star.frame.Desktop", xContext);
xCLoader = UnoRuntime.queryInterface(com.sun.star.frame.XComponentLoader.class, oDesktop);
com.sun.star.beans.PropertyValue[] szEmptyArgs = new com.sun.star.beans.PropertyValue[0];
xComp = xCLoader.loadComponentFromURL(filePath, "_blank", 0, szEmptyArgs);
System.out.println(filePath);
xDoc = UnoRuntime.queryInterface(com.sun.star.text.XTextDocument.class, xComp);
xContext = null;
} catch (Exception e) {
e.printStackTrace(System.err);
Thread.currentThread();
}
}

You must change your BootstrapSocketConnector. Here is solution:
for(int i = 8100; i<=65535 ; i++){
if(available(i)){
libre.xContext = BootstrapSocketConnector.bootstrap(libre.oooExeFolder, "localhost", i);
System.out.println(i);
break;
}
}
8100 is for example, here you must use your port which is using to connection.
And for example method available() where you check closest available port:
private static boolean available(int port) {
try{
Socket ignored = new Socket("localhost", port);
return false;
} catch (IOException ignored) {
return true;
}
}

Importing CSV into MySQL through JAVA

So I'm trying to import a CSV file into my MySQL database through my Java program. The program imports everything that's in the file, like it's suppose to, but the first row, it send to the end of the table, and the program see it's there, but if I search for that nr, it says it doesn't exists. And if I go directly to the database table and edit the nr(if the nr is 137, and I edit and write 137 again) the program recognize that nr, and if I search for it, it will find, and the database table organizes itself and sends that entry where is suppose to be.
I just don't see any logic in this. I someone could help me out, I'd appreciated.
LOAD DATA INFILE 'C:\\Users\\carla.DESKTOP-9364K9K\\Desktop\\Alunos_1.csv'
INTO TABLE utentes character set utf8
FIELDS TERMINATED BY ','
(NrProcesso, Nome, #Nome_Resumido, Ano, Turma, #Subsidio, #Nome_EE, #NIF, #email, #Obs)
SET
Subsidio = IF(#Subsidio='','Nenhum',#Subsidio),
Nome_Resumido = IF(#Nome_Resumido='',NULL,#Nome_Resumido),
Nome_EE = IF(#Nome_EE='',NULL,#Nome_EE),
NIF = IF(#NIF = '', NULL,#NIF),
email = IF(#email='',NULL,#email),
Obs = IF(#Obs='',NULL,#Obs);
Thanks in advance.

You have do do something to check cell/column value and form a sql to inject in MySQL.
public List<Object> getRecordingsListFromCsv(String csvFileLocation, String mp3FileLocation, String mp3FileLocation2, String saveFileLocation, ChannelSftp sftp) {
Map<String, File> recordingsFilesMap = null;
BufferedReader br = null;
List<String> errorFilesList = new ArrayList<>();
List<Object> tempList = new LinkedList<>();
try {
csvRows = 0;
recordingsFilesMap = new LinkedHashMap<>();
br = new BufferedReader(new FileReader(csvFileLocation));
String line = br.readLine();
scriptLog.info("\n" + csvFileLocation + " loaded. Parsing File...");
while ((line = br.readLine()) != null) {
String[] csvArray = parseCsvLineToArray(line);
// System.out.println(Arrays.asList(csvArray) + "\n\n");
if (csvArray[0].trim().isEmpty()) {
continue;
}
/* Do your stuff here */
csvRows++;
}
} catch (FileNotFoundException e) {
scriptLog.error("\n---ERROR---\n FILE NOT FOUND: " + csvFileLocation);
String errorStr = "Type=" + e.toString();
errorStr += "StackTrace=" + Arrays.toString(e.getStackTrace());
scriptLog.error(errorStr);
} catch (IOException e) {
String errorStr = "Type=" + e.toString();
errorStr += "StackTrace=" + Arrays.toString(e.getStackTrace());
scriptLog.error(errorStr);
} finally {
if (br != null) {
try {
br.close();
} catch (IOException e) {
System.out.println(e.toString());
}
}
}
Hope it will help you at some extent!!

Append a string in front of line in java?

I am creating a pattern lock based project in android.
I have a file called category.txt
The content of the file is as below
Sports:Race:Arcade:
No what i want is that whenever the user draw a pattern for a specific games category the pattern should get append in front of that category.
eg :
Sports:Race:"string/pattern string to be appended here for race"Arcade:
i have used following code but it is not working.
private void writefile(String getpattern,String category)
{
String str1;
try {
file = new RandomAccessFile(filewrite, "rw");
while((str1 = file.readLine()) != null)
{
String line[] = str1.split(":");
if(line[0].toLowerCase().equals(category.toLowerCase()))
{
String colon=":";
file.write(category.getBytes());
file.write(colon.getBytes());
file.write(getpattern.getBytes());
file.close();
Toast.makeText(getActivity(),"In Writefile",Toast.LENGTH_LONG).show();
}
}
}
catch (FileNotFoundException e)
{
e.printStackTrace();
}
catch(IOException io)
{
io.printStackTrace();
}
}
please help !

Using RandomAccessFile you have to calculate the position. I think it's much easier to just replace the file content with a little help from apache-commons-io FileUtils. This might be not the best idea if you have a very large file but it's quite simple.
String givenCategory = "Sports";
String pattern = "stringToAppend";
final String colon = ":";
try {
List<String> lines = FileUtils.readLines(new File("someFile.txt"));
String modifiedLine = null;
int index = 0;
for (String line : lines) {
String[] categoryFromLine = line.split(colon);
if (givenCategory.equalsIgnoreCase(categoryFromLine[0])) {
modifiedLine = new StringBuilder().append(pattern).append(colon).append(givenCategory).append(colon).toString();
break;
}
index++;
}
if (modifiedLine != null) {
lines.set(index, modifiedLine);
FileUtils.writeLines(new File("someFile.txt"), lines);
}
} catch (IOException e1) {
// do something
}

Trying to extract content from url in java

I am trying to extract the content of a webpage from a URL. I have already written the code but I think I have made a mistake in the regex part. When I run the code only the first line appears in the console. I am using NetBeans. Code that I already have:
private static String text;
public static void main(String[]args){
URL u;
InputStream is = null;
DataInputStream dis;
String s;
try {
u = new URL("http://ghr.nlm.nih.gov/gene/AKT1 ");
is = u.openStream();
dis = new DataInputStream(new BufferedInputStream(is));
text="";
while ((s = dis.readLine()) != null) {
text+=s;
}
} catch (MalformedURLException mue) {
System.out.println("Ouch - a MalformedURLException happened.");
mue.printStackTrace();
System.exit(1);
} catch (IOException ioe) {
System.out.println("Oops- an IOException happened.");
ioe.printStackTrace();
System.exit(1);
} finally {
String pattern = "(?i)(<P>)(.+?)";
System.out.println(text.split(pattern)[1]);
try {
is.close();
} catch (IOException ioe) {
}
}
}
}

Consider extracting your webpage information through dedicated html parsing APIs like jsoup. A simple example with your url to extract all the elements with the <p> tags would be:
public static void main(String[] args) {
try {
Document doc = Jsoup.connect("http://ghr.nlm.nih.gov/gene/AKT1")
.get();
Elements els = doc.select("p");
for (Element el : els) {
System.out.println(el.text());
}
} catch (IOException e) {
e.printStackTrace();
}
}
Console:
On this page:
The official name of this gene is “v-akt murine thymoma viral oncogene homolog 1.”
AKT1 is the gene's official symbol. The AKT1 gene is also known by other names, listed below.
Read more about gene names and symbols on the About page.
The AKT1 gene provides instructions for making a protein called AKT1 kinase. This protein is found in various cell types throughout the body, where it plays a critical role in many signaling pathways. For example, AKT1 kinase helps regulate cell growth and division (proliferation), the process by which cells mature to carry out specific functions (differentiation), and cell survival. AKT1 kinase also helps control apoptosis, which is the self-destruction of cells when they become damaged or are no longer needed.
...

You are missing a new line character during string concatenation.
Append the text with a new line char after every line is read.
Change:
while ((s = dis.readLine()) != null) {
text+=s;
}
To:
while ((s = dis.readLine()) != null) {
text += s + "\n";
}
I suggest you use, StringBulder over String for building the final text.
StringBuilder text = new StringBuilder( 1024 );
...
while ((s = dis.readLine()) != null) {
text.append( s ).append( "\n" );
}
...
System.out.println( text.toString() );

How to use java program to run command prompt commands?

this is my first time posting here, so I'm not really sure what to say/ask.
Anyways, I am trying to make a simple java program that runs command prompt commands from the java program, mainly used for ping flood (ping flooding myself).
Here is my current code
public class Core extends JFrame {
JTextField ipTextField;
int packets = 0;
boolean running = false;
public Core() {
super("Fatique");
Container container = getContentPane();
JButton bAttack = new JButton("Start Attack");
JButton bStop = new JButton("Stop Attack");
JPanel jPanel = new JPanel();
container.setLayout(new FlowLayout());
ipTextField = new JTextField("IP Address", 30);
container.add(ipTextField);
bAttack.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
String input = ipTextField.getText();
String[] value = input.split(":");
int amountOfPackets = Integer.parseInt(value[1]);
exec("cmd /c" + input + " -t -n " + amountOfPackets);
running = true;
}
});
bStop.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
stop();
}
});
if(!running) {
jPanel.add(bAttack);
} else {
jPanel.add(bStop);
}
add(jPanel);
}
public void exec(String cmd) {
try {
Process p = Runtime.getRuntime().exec(cmd);
System.out.println(getOutput(p) + " - " + getPacketsSent());
} catch (IOException e) {
e.printStackTrace();
}
}
public String getOutput(Process p) {
String output = null;
try {
BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line = null;
while ((line = in.readLine()) != null) {
output = line;
packets++;
}
return output;
} catch (IOException e) {
System.err.println(e.getStackTrace());
}
return null;
}
public int getPacketsSent() {
return packets;
}
public void stop() {
exec("cmd /c break");
running = false;
}
public static void main(String[] args) {
Core c = new Core();
c.setSize(500, 300);
c.setVisible(true);
c.setResizable(false);
c.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
c.setLocationRelativeTo(null);
}
I'm quite new at java, so that might not do what I want it to do.
What I want it to do is I enter an ip address in the textfield, and split it with ":", and after that the amount of packets, for instance
127.0.0.1:100
Though now when I try to use that ip and packet amount, it returns "null - 0" (from exec method), and I'm not even sure if it did anything related to ping.
What I am trying to accomplish is as I already said, ping flood myself, and then output whatever I get as response, though I have no idea if this code does anything even related to that, I mostly use logic when coding java.
public String getOutput(Process p) {
String output = null;
try {
BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line = null;
while ((line = in.readLine()) != null) {
output = line;
packets++;
}
return output;
} catch (IOException e) {
System.err.println(e.getStackTrace());
}
return null;
}
Could someone explain me why my code code is not working how I want it to work? Please don't judge, as I already said, I'm quite new to java programming.
EDIT: Here is a quick "informative" explanation of what I am trying to accomplish.
I type in an ip address and how many packets I want to send. In this explanation, I am using localhost ip, and 5 packets.
I start the attack. At this part, I want the program to run cmd prompt command
ping 127.0.0.1 -t -n 5
127.0.0.1 being the ip that I put in the textfield in my program, and 5 is the amount of packets I put in the textfield.
I started the attack, so this is what should happen in the command prompt:
The language is Finnish, but still the same thing.
This is the basic explanation of what I am trying to accomplish, hopefully someone understood and can help/tell why my code is not working, or is working but not printing the proper lines in eclipse console.

There is a problem with your getOutput method. It looks like you intend to collect every line of output. But in fact, since you are assigning line to output, you will only return the last line before the end of stream.
To fix this, change
output = line;
to
output += line + "\n";
Or to be more correct:
output += line + LINE_SEPARATOR;
where you previously declared the latter as:
final String LINE_SEPARATOR = System.getProperty("line.separator");
That doesn't directly explain why you are getting null, but that might be because the command you are running is writing output to the 'error' stream rather than the 'output' stream.

Try something like this:
try {
Runtime rt = Runtime.getRuntime();
Process p = rt.exec("ping 192.168.16.67");
InputStream in = p.getInputStream();
OutputStream out = p.getOutputStream ();
InputStream err = p.getErrorStream();
p.destroy();
} catch(Exception exc) {}
Then, you'll have to read the out variable to parse the ping command output continuously.

bAttack.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
String input = ipTextField.getText();
String[] value = input.split(":");
int amountOfPackets = Integer.parseInt(value[1]);
try {
p=Runtime.getRuntime().exec("ping -n "+amountOfPackets+" "+value[0]);
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
running = true;
}
Just a small modification of your code. get output is as:
public String getOutput(Process p) {
String output = null;
try {
BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line = null;
while ((line = in.readLine()) != null) {
output =output+ line+"\n";
packets++;
}
return output;
} catch (IOException e) {
System.err.println(e.getStackTrace());
}
return null;
}
Here output is JTextArea I have taken to display the output of PING process. I cannot show you the output because I lack reputation.
I don't know why first line is null. Anyway, it works.
Hope this help you. Have good time coding.