Read blob 's data and write them to a table

I've managed at last to upload a blob to a table database (thanks to KUBA's)
Now I want to retrieve the blob from the database table , read it's contents and insert them to a new table. I want to do this after the upload process finishes...
the blob is always a txt file similar to this
GR;Greece
CY;Cyprus
Because I am a bit lost any guidelines would be very helpfull
thanks

Hi user571628. A couple of days ago I was working on the same thing, I couldn't finish the app. 'cause I was assigned to do other web app., I used the same example as you to upload the image to the DB and someone called "gnewtonaus" came up with what appears to be an excellent idea to do it, you have to use something called PL/SQL web toolkit (I have never used it and don't know how it works)... but this is what you have to do:
You've already solved the upload part so to download the BLOB (say an image in his example) you can use a simple PL/SQL stored procedure like the one below
E.g to display an image (from the DB) on an HTML page you just use

-- Display a photo from the database
procedure display_photo(i_person_id in varchar2) is
v_blob blob;
begin
-- retrieve blob from database
select image into v_blob from pho_photos where person_id = i_person_id;
-- set http headers
owa_util.mime_header('image/jpeg', FALSE);
htp.p('Content-Length: ' || dbms_lob.getlength(v_blob));
owa_util.http_header_close;
-- initiate direct BLOB download
wpg_docload.download_file(v_blob);
exception
when others then
htp.p(to_char(sqlcode)||' - '||sqlerrm) ;
end; -- display_photo
Message was edited by:
gnewtonaus
If you get it running please post how you did it, bacause I'll have to come back and do it myself.
Regards

Similar Messages

Reading multiple text files and writing them to one text file

Hi,
I'm trying to read a number of text files and write them to a single master file. My program reads all the files but only writes the last one to the master file.
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
// Input/Output Classes
import java.util.Scanner;
import java.io.PrintWriter;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.FileNotFoundException;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.JTextArea;
import java.awt.GridLayout;
public class Actor implements ActionListener
public static String DataRoot = "I:\\JAVA\\UBP\\DAT
public static JFrame SW = new JFrame();
public static JTextField txtSPath;
public static JTextArea txtTable;
public void actionPerformed( ActionEvent e )
String Command = e.getActionCommand();
if (Command.equals("Process") )
SetupWin();
ProcessAll();
public void SetupWin()
SW.setTitle("void");
SW.setSize(300,400);
SW.setLayout(new GridLayout(6,1));
txtSPath = new JTextField(40);    SW.add(txtSPath);
txtTable = new JTextArea(10, 40); SW.add(txtTable);
SW.setVisible(true);
public void ProcessAll()
Process("Dunstable","Finance");
Process("Dunstable","Production");
Process("Dunstable","Sales");
public void Process(String Town, String Dept)
String SPath = DataRoot + Town + "
" + Dept + ".txt";
String MPath = DataRoot + "masterFile" + ".txt";
txtSPath.setText(SPath);
String message = "Trying " + SPath;
System.out.println(message);
String SlaveTable=message;
try// if following fails an exception is thrown
Scanner Slave = new Scanner(new FileInputStream(SPath)); // reads slave file
PrintWriter outputStream = null;
outputStream = new PrintWriter(new FileOutputStream(MPath));
while ( Slave.hasNextLine() ) // reads text line by line
//Read and output next record
String PartRecord = Slave.nextLine();
String FullRecord = Town + " " + PartRecord;
System.out.println(FullRecord);
outputStream.println(FullRecord);
Slave.close();
outputStream.close();
txtTable.setText(SlaveTable);
//An Exception Error would be THROWN by above & CAUGHT below
catch(FileNotFoundException e)
message = "Could Not Find " + SPath;
System.out.println(message);     //console
txtSPath.setText(message);     //window
catch(IOException e)
System.out.println("Slave I/O Problem " + SPath);
}Edited by: Ardour on Mar 4, 2008 1:53 PM

I haven't looked closely, but my spidey sense tingles at this:
new FileOutputStream(MPath)This will clobber (erase) the previous contents of the file. Open in append mode:
new FileOutputStream(MPath, true)Of course, if the file exists before you run this code, you will end up append to the original contents. If that is not wanted, consider using File's delete method first.

Reading an XML file and write the contents to another xml file in java

Hi,
I am new to xml parsing.My requirement is that I am getting a message (xml) using ibm MQ in the ByteArrayInputStream format.I have to read this xml message and write to another file.
I am creating a POC for this.
First I used simple reading and writing concept but the output is "java.io.FileInputStream@3e25a5 "
Sample xml file
- <Client>
<ClientId>1234</ClientId>
<ClientName>STechnology</ClientName>
<DTU_ID>567</DTU_ID>
<ClientStatus>ACTIVE</ClientStatus>
- <LEAccount>
<ClientLE>678989</ClientLE>
<LEId>56743</LEId>
- <Account>
<AccountNumber>9876543678</AccountNumber>
</Account>
</LEAccount>
- <Service>
<Cindicator>Y2Y</Cindicator>
<PrefCode>980</PrefCode>
<BSCode>876</BSCode>
<MandatoryContent>MSP</MandatoryContent>
</Service>
</Client>
code:
import java.io.ByteArrayInputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
public class ByteArrayInputStreamToXml {
     public static void main(String srg[]) throws IOException{
          InputStream inputStream= new FileInputStream("C:\\soft\\test2\\sample1.xml");
          byte currentXMLBytes[] = inputStream.toString().getBytes();
          ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(currentXMLBytes);
          OutputStream out = new FileOutputStream("C:\\soft\\test\\data.xml");
          int read=0;
          byte[] bytes = new byte[1024];
          while((read = byteArrayInputStream.read(bytes))!= -1){
          out.write(bytes, 0, read);
          out.write( '\n' );
          inputStream.close();
          out.flush();
          out.close();
          System.out.println("New file created!");
Please suggest me how can I use DOM/SAX parser ,I can see several code on net for reading xml file using SAX/DOM parser but writing an xml file after reading it using ByteArrayInputStream I am not getting .A help through some example Link will also be helpful for me.
Thanks
Sumit
Edited by: user8687839 on Apr 30, 2012 2:37 AM
Edited by: user8687839 on Apr 30, 2012 2:43 AM

Thanks I got the result.
package com.sumit.collections;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
public class ByteArrayInputStreamToXml {
     public static void main(String srg[]) throws IOException{
          InputStream inputStream= new FileInputStream("C:\\soft\\test2\\sample1.xml");
          ByteArrayOutputStream buffer = new ByteArrayOutputStream();
          int nRead; byte[] data = new byte[1024];
          while ((nRead = inputStream.read(data, 0, data.length)) != -1) {
          buffer.write(data, 0, nRead); } buffer.flush();
          byte currentXMLBytes[]= buffer.toByteArray();
          /* byte currentXMLBytes[] = inputStream.toString().getBytes();*/
          ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(currentXMLBytes);
          OutputStream out = new FileOutputStream("C:\\soft\\test\\data.xml");
          int read=0;
          byte[] bytes = new byte[1024];
          while((read = byteArrayInputStream.read(bytes))!= -1){
          out.write(bytes, 0, read);
          out.write( '\n' );
          inputStream.close();
          out.flush();
          out.close();
          System.out.println("New file created!");
}

Programmatically read .rpt file, datasource and write it to word using ..

I am using Crystal Reports 2008. The default editable rtf export format is tab based, really not useful for table formatted data.
I would like to read rpt file along with data (e.g. saved xml source data) and write it to ms word format using com objects. Is this possible? If yes and supporting tutorial or information.
2nd: Is there any available ready software/tool to a true word format conversion?
Thanks in advance.

I would like to read rpt file along with data (e.g. saved xml source data) and write it to ms word format using com objects. Is this possible? If yes and supporting tutorial or information.
- Export to XML(?)
Sample; vbnet_win_export.zip at [this|http://wiki.sdn.sap.com/wiki/display/BOBJ/CrystalReportsfor.NETSDK+Samples] link.
Developer Help files:
https://boc.sdn.sap.com/developer/library
[Crystal Reports for Visual Studio 2005 Walkthroughs|http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/2081b4d9-6864-2b10-f49d-918baefc7a23]
Above will apply to your version of CR and .NET also.
Is there any available ready software/tool to a true word format conversion?
- Not from SAP. Perhaps some 3rd party software(?).
Oh, and the wiki [Available Export Formats, Crystal Reports 9.1 to Crystal Reports 2008|http://wiki.sdn.sap.com/wiki/display/BOBJ/AvailableExportFormats%2CCrystalReports9.1toCrystalReports+2008] may be good to have also.
- Ludek

Read Xml, Manipulate it and write it

I need a simple Example of reading XML, manipulate it and write it out.

I need a simple Example of reading XML, manipulate it and write it out.

How would you read in each line of data and display them to message box?

How would you read in each line of data from the _.txt file_ and display the whole data using an information-type message box?
I know how to display each line of the .txt file data, but I do not know how to display the whole thing.
Here is how I did to display each line of data using the message box:
import javax.swing.JOptionPane;          // Needed for the JOptionPane class
import java.io.*;                         // Needed for file classes
public class problem3
     public static void main(String[] args) throws IOException
          String filename;          // Needed to read the file
          String categories;          // Needed to read the categories
          // Get the filename.
          filename = JOptionPane.showInputDialog("Enter the filname.");
          // Open the file.
          FileReader freader = new FileReader(filename);
          BufferedReader inputFile = new BufferedReader(freader);
          // Read the categories from the file.
          categories = inputFile.readLine();
          // If a category was read, display it and
          // read the remainig categories.
          while(categories != null)
               // Display the last category read.
               JOptionPane.showMessageDialog(categories);
               // Read the next category.
               categories = inputFile.readLine();
          // Close the file.
          inputFile.close();
}I think I need to change here:
// If a category was read, display it and
          // read the remainig categories.
          while(categories != null)
               // Display the last category read.
               JOptionPane.showMessageDialog(categories);
               // Read the next category.
               categories = inputFile.readLine();
          }but I don't know how to.
Could you please help me?
Thank you.

kyorochan wrote:
jverd wrote:
What is not understood about your question is which part of "read a bunch of lines and display them in a textbox" do you not understand.
First thing's first though: You do recognize that "read a bunch of lines and display them in a textbox" has a few distinct and completely independent parts, right?I'm sorry. I'm not good at English, so I do not understand what you said...
What I was trying to say is "How to display the whole lines of .txt file in single dialog box."We know that.
Do you understand that any problem can be broken down into smaller pieces?
Do you understand that your problem has the following pieces?
1. Read lines from the file.
2. Put the lines together into one String.
3. Put the String into the message box.
and maybe
4. Make sure the message box contents are split into lines exactly as the file was.
(You didn't make it clear if that last one is a requirement.)
Do you understand that 1-4 are completely independent problems and can be solved separately from each other?
Do you understand that you have stated that you already know how to do 1 and 3?
Therefore, you are NOT asking "How to display the whole lines of .txt file in single dialog box." Rather, you ARE asking either #2 or #4 or both.
If you say once more "display all the lines of the file in one dialog box," then it is clear that we are unable to communicate with you and we cannot help you.

Feature Request: Functions to read image data, and write to tiff or jpeg.

Functions that render image data and make it available to plugins before writing to disk would facilitate writing plugins that take rendered image data into consideration. Also, if the aforementioned image data could be subsequently written to disk possibly after a bit of modification, it would open up a whole new world for plugins.
Plugins don't need to access the mid-rendering stages in the raw conversion / rendering pipeline, but having a shot at post-rendered, pre-written to disk image data would allow pixel manipulating export plugins to be written. A set of image file manipulation methods would be a decent work-around, providing the ability to read/write tiff/jpeg files.
Rob

Well, I'm replying to my own question!
I solved the problem by reading the data from my card, then using Flatten Pixmap to create a pixmap from my data array, then using Draw Flattened Pixmap to create a picture to send to a 2D Picture. This works fine.
Now, how can I change the Pixmap into Image so I can save to an AVI?

Reading Data from Unix file and write into an Internal table

Dear all,
                 I am having an requirement of reading data from unix file and write the same into an internal table..how to do that ...experts please help me in this regard.

Hi,
do like this
PARAMETERS: p_unix LIKE rlgrap-filename OBLIGATORY.
DATA: v_buffer(2047) TYPE c.
DATA: BEGIN OF i_buffer OCCURS 0,
        line(2047) TYPE c,
END OF i_buffer.
* Open the unix file..
OPEN DATASET p_unix FOR INPUT IN TEXT MODE.
<b>IF sy-subrc NE 0.
*** Error Message "Unable to open file.
ELSE.</b>
   DO.
     CLEAR: v_buffer.
     READ DATASET p_unix INTO v_buffer.
     IF sy-subrc NE 0.
        EXIT.
     ENDIF.
     MOVE v_buffer TO i_buffer.
     APPEND i_buffer.
ENDDO.
ENDIF.
CLOSE DATASET p_unix.
<b>Reward points if it helps,</b>
Satish

How to Read from two file and write to another file --Please help !!

Hi all,
Please suggest me where i'm goin goin wrng.
I have 2 flat files. one of them is the main file(Ann.dat) has a about 150,000 lines (each line has unique ID from 00001 to 45000) of data and the the other(Miss.dat) has a just a list of IDs that are no longer in use & have to be deleted from the first file(NewAnn.dat). (Note that Ann.dat is a tab delimitted file and Miss.dat is just a list of all invalid IDs)
Below is my code. It doesn't do what I'm supposed to. Please suggest me or help me with a code to do it. What I'm trying to do is read each of the lines from the 2 files compare the ID in ann.dat with all the IDs in Miss.dat & if it doesn't match with the ID in Miss.dat write the whole line to NewAnn.dat. And do the rest with all the lines in Ann.dat.
It could be a real dumb question. since i'm not a software professional, I consider myself to be newbie to programming. I desperately need your help.
import java.io.*;
import java.util.*;
public class anntemp{
     public static void main(String[] args)
          String keyAnn ="";
          String keyMis="";
          String recAnn =null;
          String recMis =null;
          try{
          FileReader fr=new FileReader("C:\\Tom\\Ann.dat");
          BufferedReader br=new BufferedReader(fr);
          int couter=0;
          while ((recAnn = br.readLine())!=null)
               couter++;
               keyAnn = recAnn.substring(0, recAnn.indexOf("\t"));
          FileReader fr1=new FileReader("C:\\Tom\\Miss.dat");
          BufferedReader br1=new BufferedReader(fr1);
          while((recMis = br1.readLine())!=null){
          keyMis = recMis.substring(0, recMis.indexOf("\t"));
               if(keyAnn.equals(keyMis)){
     FileWriter fw=new FileWriter("C:\\Tom\\NewAnn.dat",true);
     BufferedWriter bw=new BufferedWriter(fw);
     PrintWriter pw=new PrintWriter(bw);
     StringBuffer writeValue = new StringBuffer();
     writeValue.append(recAnn);
                                             pw.println(writeValue.toString());
     pw.flush();
          }catch (Exception expe){
               System.out.println("In Exception ");
               expe.printStackTrace();
Thank you all in advance,
br

I think you need to close the files when you are done in the inner loop. Plus I think you'll be overwritting the file in the inner loop if more than one match. It might be easier to read the unused id file into a map at the start, and then loop up the id's from the master file in the map. You can put the unused id's in as the keys, and a Boolean.TRUE as the value (value won't matter). Then just check if the map contains the key for the id read from the master file. That should cut down on disk activity. This assumes the unused id file is smallish.

How can I receive data and print them in the smartform INTNOM2_N1?

Hi experts!!
I've to receive data from some tables and print them into the smarform INTNOM2_N1, for example I need to receive the data stext from the table hrp1000, but when I tried to do this, this doesn't work
SELECT SINGLE STEXT FROM HRP1000 INTO WA_FORM_n1-STEXT
                      WHERE OBJID = P0001-PLANS AND
                      PLVAR       = '01' .
   because the data p0001-plans is empty how can I do this? I've tried with
RP_PROVIDE_FROM_LAST P0001 SPACE VERSC-FPBEG VERSC-FPEND, but I think in smartforms we can't use RP_PROVIDE_FROM_LAST because I receive an error message,
Does anybody know how can i do this?!
Thanks a lot,
Regards,
Rebeca

Hi
Please write this code in the smartform and pass on this internal table to the smartform FM..
Also, in the form interface of the smartform declare the table to which u want to pass these values.
The above process will help u to pass values into the smartform from print program.
Regards,
Vishwa.

Urgent Help:read from text file and write to table

Hi,
I'm a super beginner looking for a vi to read this data from a text file and insert it into a table:
   #19
Date: 05-01-2015
ID= 12345678
Sample_Rate= 01:00:00
Total_Records= 2
Unit: F
   1 03-23-2015 10:45:46   70.1   3.6
   2 03-23-2015 11:45:46   67.7   2.7
Output table
#     date                 time                 x          y        Sample rate    Total Records
1          03-23-2015     10:45:46        76.8     2.8      01:00:00           2
2          03-23-2015     10:45:46        48.7 2.1      01:00:00           2
Thanks for your help in advance.
Attachments:
sample.txt ‏1 KB

jcarmody wrote:
Will there always be the same number of rows of noise header information?
Show us how you've read the data and what you've tried to do to parse it. Once you've got the last rows, you can loop over them using Spreadsheet String to Array (after cleaning up a few messy spaces).
Jim,
I didn't know you're that active on here.
Yes, There will always be the same number of noise header information.
I'll show you in person
Regards,

Read PDF Formatted Spool and write PDF File to Application Server

Hi Experts,
After ECC 6.0, HR-W2 and W2C Form Spools are getting generated in PDF format.
We have a requirement wherein we want to read the PDF Spool Programatically and write the PDF file to Application server (Using OPEN DATASET and CLOSE DATASET)
PARAMETERS : p_spono LIKE tsp01-rqident.
DATA: pdf_data type FPCONTENT.
types: lt_pdf_table(1000) type x.
data: l_pdf_data type standard table of lt_pdf_table,
       l_pdf_line type lt_pdf_table,
       l_offset type i,
       l_len type i,
       p_file(100) VALUE '\sapout\DVH\pdf2.pdf'.
*Read the spool content
CALL FUNCTION 'FPCOMP_CREATE_PDF_FROM_SPOOL'
    EXPORTING
         i_spoolid = p_spono
         i_partnum = '1'
    IMPORTING
           e_pdf = pdf_data
*         e_pdf_file = file
    EXCEPTIONS
         ads_error = 1
         usage_error = 2
         system_error = 3
         internal_error = 4
    OTHERS = 5.
* Modify the spool contents to prepare internal table
l_len = xstrlen( pdf_data ).
while l_len >= 1000.
    l_pdf_line = pdf_data+l_offset(1000).
    append l_pdf_line to l_pdf_data.
    add 1000 to l_offset.
    subtract 1000 from l_len.
endwhile.
if l_len > 0.
    l_pdf_line = pdf_data+l_offset(l_len).
    append l_pdf_line to l_pdf_data.
endif.
* GUI DOWNLOAD Works Fine
* Now pdf contents is ready , lets store in local PC
*CALL FUNCTION 'GUI_DOWNLOAD'
* EXPORTING
*   filename                        = 'C:\Documents and Settings\Desktop\shital.pdf'
*   filetype                        = 'BIN'
* TABLES
*    data_tab                        = l_pdf_data.
OPEN DATASET p_file FOR OUTPUT IN BINARY MODE.
IF sy-subrc <> 0.
MESSAGE ID '00' TYPE 'E' NUMBER '398' WITH 'sy-subrc:' sy-subrc
          ' Error opening file:'(Z03) p_file.
ENDIF.
LOOP AT l_pdf_data INTO l_pdf_line.
TRANSFER l_pdf_line TO p_file.
ENDLOOP.
CLOSE DATASET p_file.
IF sy-subrc <> 0.
MESSAGE ID '00' TYPE 'E' NUMBER '398' WITH 'sy-subrc:' sy-subrc
          ' Error closing file:'(Z04) p_file.
ENDIF.
Currently as you can see I have commented out GUI_DOWNLOAD Function Module, But it works perfect when I try to Download file to Local Desktop.
But when I try to pass the same Contents to Application server file and then try to open it by downloading file then it opens BLANK pdf file.
As per requirements I should be able to write the file correctly on Application server and If I dowload it from there it should open PDF file correctly.
Let me know if you require further details about the issue.
Regards
Shital
Edited by: shital phadake on Apr 8, 2009 9:39 PM

Thanks Selçuk for your reply and taking time for understanding the Issue,
I went thru Functionality of the program you suggested but dont think it matches my requirement.
Regards
Shital

Read a doc file and write back to a doc file

How to read line by line from a doc file and then arrange it.
Like-->
amit
sumit
prem
jeev
these four names are present in the doc file. Now how to read by means of java program and sort these names and write back to a new doc file?????
What packages and methods are to be used??
Please help.....
Edited by: Jaguar on Apr 11, 2011 12:16 AM

Jaguar wrote:
How to read line by line from a doc file and then arrange it.By 'doc' do you mean MS Word?
these four names are present in the doc file. Now how to read by means of java program and sort these names and write back to a new doc file?????You seem to have a sticky '?' key and an unreliable shift key (to apply an upper case letter to the start of every sentence). Please fix them.

Read multiple text files and sort them

I am trying to read multiple text files and store the data from the file in vector.
but for days. I am with no luck. anyone can help me out with it? any idea of how to sort them will be appreciated.
Below is part of the code I implemented.
public class packet {
    private int timestamp;
    private int user_id;
    private int packet_id;
    private int packet_seqno;
    private int packet_size;
    public packet(int timestamp0,int user_id0, int packet_id0,int packet_seqno0, int packet_size0)
        timestamp = timestamp0;
        user_id=user_id0;
        packet_id=packet_id0;
        packet_seqno=packet_seqno0;
        packet_size=packet_size0;
    public void setTime(int atimestamp)
        this.timestamp=atimestamp;
    public void setUserid(int auserid)
        this.user_id=auserid;
    public void setPacketid(int apacketid)
        this.packet_id=apacketid;
    public void setPacketseqno(int apacketseqno)
        this.packet_seqno=apacketseqno;
    public void setPacketsize(int apacketsize)
        this.packet_size=apacketsize;
    public String toString()
        return timestamp+"\t"+user_id+"\t"+packet_id+"\t"+packet_seqno+"\t"+packet_size+"\t";
}Here is the data from part of the text files. ( the first column is timestamp, second is userid, third is packetid.....)
0 1 1 1 512
1 2 1 2 512
2 3 1 3 512
3 4 1 4 512
4 5 1 5 512
5 6 1 6 512
6 7 1 7 512
7 8 1 8 512
8 9 1 9 512
9 10 1 10 512
10 1 2 11 512
11 2 2 12 512
12 3 2 13 512
13 4 2 14 512
14 5 2 15 512
15 6 2 16 512
16 7 2 17 512

Here's a standard idiom for object-list-sorting:
/* cnleafdata.txt *********************************************
0 1 1 1 512
1 2 1 2 512
2 3 1 3 512
3 4 1 4 512
4 5 1 5 512
5 6 1 6 512
6 7 1 7 512
7 8 1 8 512
8 9 1 9 512
9 10 1 10 512
10 1 2 11 512
11 2 2 12 512
12 3 2 13 512
13 4 2 14 512
14 5 2 15 512
15 6 2 16 512
16 7 2 17 512
import java.util.*;
import java.io.*;
public class Packet implements Comparable<Packet>{
private int timeStamp;
private int userId;
private int packetId;
private int packetSeqno;
private int packetSize;
public Packet(int timeStamp0, int userId0, int packetId0,
   int packetSeqno0, int packetSize0) {
    timeStamp = timeStamp0;
    userId = userId0;
    packetId = packetId0;
    packetSeqno = packetSeqno0;
    packetSize = packetSize0;
public Packet(String timeStamp0, String userId0, String packetId0,
   String packetSeqno0, String packetSize0) {
    this(Integer.parseInt(timeStamp0), Integer.parseInt(userId0),
     Integer.parseInt(packetId0), Integer.parseInt(packetSeqno0),
     Integer.parseInt(packetSize0));
public Packet(String[] a){
    this(a[0], a[1], a[2], a[3], a[4]);
public void setTime(int aTimeStamp){
    timeStamp = aTimeStamp;
public void setUserId(int aUserId){
    userId = aUserId;
public void setPacketId(int aPacketId){
    packetId = aPacketId;
public void setPacketSeqno(int aPacketSeqno){
    packetSeqno = aPacketSeqno;
public void setPacketSize(int aPacketSize){
    packetSize = aPacketSize;
public int getUserId(){
    return userId;
public String toString(){
    return String.format
("%2d %2d %2d %2d %4d", timeStamp, userId, packetId, packetSeqno, packetSize);
public int compareTo(Packet otherPacket){
    return userId - otherPacket.getUserId();
/* main for test */
public static void main(String[] args){
    String line;
    ArrayList<Packet> alp;
    alp = new ArrayList<Packet>();
    try{
      BufferedReader br = new BufferedReader(new FileReader("cnleafdata.txt"));
      while ((line = br.readLine()) != null){
        // if (! recordValid(line)){
        //   continue;
        String[] ar = line.split("\\s");
        alp.add(new Packet(ar));
    catch (Exception e){
      e.printStackTrace();
    System.out.println("[original]");
    for (Packet p : alp){
      System.out.println(p);
    System.out.println();
    Collections.sort(alp);
    System.out.println("[sorted by user ID]");
    for (Packet p : alp){
      System.out.println(p);
}

How to read a text file and write text file

Hello,
I have a text file A look like this:
0 0
0 A B C
1 B C D
2 D G G
10
1 A R T
2 T Y U
3 G H J
4 T H K
20
1 G H J
2 G H J
I want to always get rid of last letter and select only the first and last line and save it to another text file B. The output should like this
0 A B
2 D G
1 A R
4 T H
1 G H
2 G H
I know how to read and write a text file, but how can I select the text when I am reading a text file. Can anyone give me an example?
Thank you

If the text file A look like that
0 0
0 3479563,41166 6756595,64723 78,31 1,#QNAN
1 3479515,89803 6756588,20824 77,81 1,#QNAN
2 3479502,91618 6756582,6984 77,94 1,#QNAN
3 3479516,16334 6756507,11687 84,94 1,#QNAN
4 3479519,14188 6756498,54413 85,67 1,#QNAN
5 3479525,61721 6756493,89255 86,02 1,#QNAN
6 3479649,5546 6756453,21824 89,57 1,#QNAN
1 0
0 3478762,36013 6755006,54907 54,8 1,#QNAN
1 3478756,19538 6755078,16787 53,63 1,#QNAN
2 0
3 0
N 0
I want to read the line that before and after 1 0, 2 0, ...N 0 line to arraylist. I have programed the following code
public ArrayList<String>save2;
public BufferedWriter bufwriter;
File writefile;
String filepath, filecontent, read;
String readStr = "" ;
String[]temp = null;
public String readfile(String path) {
int i = 0;
ArrayList<String> save = new ArrayList <String>();
try {
filepath = "D:\\thesis\\Material\\data\\CriticalNetwork\\test3.txt";
File file = new File(filepath);
FileReader fileread = new FileReader(file);
BufferedReader bufread = new BufferedReader(fileread);
this.read = null;
// read text file and save each line content to arraylist
while ((read = bufread.readLine()) != null ) {
save.add(read);
// split each arraylist[i] element by space and save it to String[]
for(i=0; i< save.size();i++){
this.temp = save.get(i).split(" ") ;
// if String[] contain N 0 such as 0 0, 1 0, 2 0 then save its previous and next line from save arraylist to save2 arraylist
if (temp.equals(i+"0")){
this.save2.add(save.get(i));
System.out.println(save2.get(i));
} catch (Exception d) {
System.out.println(d.getMessage());
return readStr;
My code has something wrong. It always printout null. Can anyone help me?
Best Regards,
Zhang

Read blob 's data and write them to a table

Similar Messages

Maybe you are looking for