How to create cookies in webdynpro and How to read from cookies
Hi all
Please let us know how to create cookies and how to store and retrieve the data from cookies in webdynpro.
we have the following requirement in each and every webdynpro form we have dropdownbox UI element , when ever a user logins into portal then he will select his state from the dropdownbox UI element then when even again the same user logs into portal and select the state field then the previously existing value which ever used in cookies that should be selected as dropdownbox.
can you please send sample codes how to create and read the data from cookies in webdynpro?
if you have any useful links or documents on this cookies in webdynpro then it would be great help to us.
Thanks in advance.
Regards
Kalki reddy
Hi,
Have a look at the following thread:
Re: How to use Cookies in Web DynPro?
This may help you.
Regards.
Rajat
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How to read from properties file
Hi,
I am using JSR 168.
while creating a new portlet, a folder gets created with the name as "portlet". Under which is resource package and <PortletName>Bundle.java.
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Thanks & Regards,
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Edited by: user9003827 on Apr 13, 2010 3:42 AMI think i have mixed it up :)
I have looked at it again and believe you are using regular JSP portlets.
Can you tell what you want to achieve by reading .properties file. Are you meaning the preferences of the portlet or what exactly are you trying to do?
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Hi
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I would like to read data (frequencies) already written in a text file. I will need read these frequencies one at a time to set the function generator (as part of my data acquisition application), acquire data that is in turn written to a file and then go back and read the next frequency from the file to repeat the process again. I also have another idea of doing the same, which is read all the frequencies from the text file and populate a table and a frequency value is picked from the table each time to go through the process mentioned above.
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Depending on the format of the data file, there are a few options for reading it. If it is tab delimited, you may want to use the Read from SpreadSheet File VI which will read the file into an Array. You can then use the Index Array VI to pull out individual entries. If the files is ASCII but not tab delimited, you could use the regular Open File and Read File VIs. You can either read the file out piece by piece, or read the entire file into a string and then use the Match Pattern VI to parse out the different elements (there are actually many ways to do this - check out the Strings subpalette).
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Hello,
I have a device which sends MPEG2 multicast udp live stream, I can read it from udp://@236.1.1.14:34000 for instance. Next it is transcoded with vlc :
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hi guys can anyone help me?
how to read from the file if the file was like this
2 2
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i tried using the string tokenizer but it kept saying
no such element
i tried this code:
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temp = (String) (cols.nextElement());
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BufferedReader buff = new BufferedReader(file);
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public class forum{
public static void main(String args[]) throws IOException
InputStreamReader is = new InputStreamReader(System.in);
BufferedReader br = new BufferedReader(is);
String input = "";
do
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catch ( IOException io ) {}
} while (!input.equals("exit"));
[code\]
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--Kenny Brandon WilsonTalked to Adobe support this morning, this is their response in case anyone else is looking for help. I'm running a Windows 7 box, LR 5.6.
Gokul: Click on start and type %appdata%, then open roaming folder.
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Gokul: Open Lightroom folder> Preferences.
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I keep receiving this error every time I open LR, "Lightroom encountered and error when reading from its preview cache and needs to quit" and the app won't open. It said LR would try and fix this error next time I opened it but the error remains. I tried uninstalled and installing the app and the error remains. I have windows 8. Can anyone please help???
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How to read from and write into the same file from multiple threads?
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How to read from BLOB and Write to a file in user readable format.
Hi,
I am trying to read from a BLOB column and write the content to a file in user readable format. So far I was able to read the Blob column using dbms_lob, but not able to write to a file. Kindly let me know the method to do this.Hi, with this Java Code from Oracle Technet it's a easy thing:
// classpath= /ORACLE/u01/app/oracle/product/10.2.0.3/jdbc/lib/ojdbc14.jar
// Java SQL classes
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
// Oracle JDBC driver class
import oracle.jdbc.OracleDriver;
// Java IO classes
import java.io.IOException;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
//Java Util classes
import java.util.Properties;
* This class demonstrates the Oracle JDBC 10g enhanced features for inserting
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* existing PreparedStatement.setString() and PreparedStatement.getString()
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public class ClobMan {
/* Database Connection object */
private Connection conn = null;
/* Variables to hold database details */
private String url = null;
private String user = null;
private String password = null;
// Create a property object to hold the username, password and
// the new property SetBigStringTryClob.
private Properties props = new Properties();
/* String to hold file name */
private String fileName = null;
* Default Constructor to instantiate and get a handle to class methods
* and variables.
public ClobMan(String fileName) {
this.fileName = fileName;
* Main runnable class.
public static void main(String[] args) throws SQLException {
// Instantiate the main class.
ClobMan clobMan = new ClobMan(args[0]);
// Load the Oracle JDBC driver class.
DriverManager.registerDriver(new OracleDriver());
// Load the database details into the variables.
String dbUrl = "jdbc:oracle:thin:@pmol:1550:dbpmol";
clobMan.url = dbUrl;
clobMan.user = "gh10";
clobMan.password = "secret";
// Populate the property object to hold the username, password and
// the new property 'SetBigStringTryClob' which is set to true. Setting
// this property allows inserting of large data using the existing
// setString() method, to a CLOB column in the database.
clobMan.props.put("user", clobMan.user );
clobMan.props.put("password", clobMan.password);
clobMan.props.put("SetBigStringTryClob", "true");
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//clobMan.checkTables();
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//clobMan.insertClob();
clobMan.selectClob();
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* Oracle JDBC 10g has enhanced the existing PreparedStatement.setString()
* method for setting the data more than 32765 bytes. So, using setString(),
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private void insertClob() throws SQLException {
// Create a PreparedStatement object.
PreparedStatement pstmt = null;
try {
// Create the database connection, if it is closed.
if ((conn==null)||conn.isClosed()){
// Connect to the database.
conn = DriverManager.getConnection( this.url, this.props );
// Create SQL query to insert data into the CLOB column in the database.
String sql = "INSERT INTO clob_tab VALUES(?)";
// Read a big file(larger than 32765 bytes)
String str = this.readFile();
// Create the OraclePreparedStatement object
pstmt = conn.prepareStatement(sql);
// Use the same setString() method which is enhanced to insert
// the CLOB data. The string data is automatically transformed into a
// clob and inserted into the database column. Make sure that the
// Connection property - 'SetBigStringTryClob' is set to true for
// the insert to happen.
pstmt.setString(1,str);
// Execute the PreparedStatement
pstmt.executeUpdate();
} catch (SQLException sqlex) {
// Catch Exceptions and display messages accordingly.
System.out.println("SQLException while connecting and inserting into " +
"the database table: " + sqlex.toString());
} catch (Exception ex) {
System.out.println("Exception while connecting and inserting into the" +
" database table: " + ex.toString());
} finally {
// Close the Statement and the connection objects.
if (pstmt!=null) pstmt.close();
if (conn!=null) conn.close();
* This method reads the CLOB data from the database by using getString()
* method.
private void selectClob() throws SQLException {
// Create a PreparedStatement object
PreparedStatement pstmt = null;
// Create a ResultSet to hold the records retrieved.
ResultSet rset = null;
try {
// Create the database connection, if it is closed.
if ((conn==null)||conn.isClosed()){
// Connect to the database.
conn = DriverManager.getConnection( this.url, this.props );
// Create SQL query statement to retrieve records having CLOB data from
// the database.
String sqlCall = "SELECT rownum, name, sourcetext FROM t_source";
pstmt= conn.prepareStatement(sqlCall);
// Execute the PrepareStatement
rset = pstmt.executeQuery();
String rownum = null;
String o_name =null;
String clobVal = null;
// Get the CLOB value from the resultset
//java.io.BufferedWriter out = new java.io.BufferedWriter(new java.io.FileWriter("pr_all.sql"));
while (rset.next()) {
rownum = rset.getString(1);
o_name = rset.getString(2);
clobVal = rset.getString(3);
System.out.println(" length: "+clobVal.length()+" "+o_name+" "+rownum);
java.io.BufferedWriter out =
new java.io.BufferedWriter(new java.io.FileWriter(o_name+".prc"));
out.write(clobVal);
out.newLine();
out.write("/");
out.newLine();
out.newLine();
out.flush();
out.close();
} catch (SQLException sqlex) {
// Catch Exceptions and display messages accordingly.
System.out.println("SQLException while connecting and querying the " +
"database table: " + sqlex.toString());
} catch (Exception ex) {
System.out.println("Exception while connecting and querying the " +
"database table: " + ex.toString());
} finally {
// Close the resultset, statement and the connection objects.
if (rset !=null) rset.close();
if (pstmt!=null) pstmt.close();
if (conn!=null) conn.close();
* Method to check if the table ('CLOB_TAB') exists in the database; if not
* then it is created.
* Table Name: CLOB_TAB
* Column Name Type
* col_col CLOB
private void checkTables() {
Statement stmt = null;
ResultSet rset = null;
try {
// Create the database connection, if it is closed.
if ((conn==null)||conn.isClosed()){
// Connect to the database.
conn = DriverManager.getConnection( this.url, this.props );
// Create Statement object
stmt = conn.createStatement();
// Check if the table is present
rset = stmt.executeQuery(" SELECT table_name FROM user_tables "+
" WHERE table_name = 'CLOB_TAB' ");
// If the table is not present, then create the table.
if (!rset.next()) {
// Table does not exist, create it
stmt.executeUpdate(" CREATE TABLE clob_tab(clob_col CLOB)");
} catch (SQLException sqlEx) {
System.out.println("Could not create table clob_tab : "
+sqlEx.toString());
} finally {
try {
if( rset != null ) rset.close();
if( stmt != null ) stmt.close();
if (conn!=null) conn.close();
} catch(SQLException ex) {
System.out.println("Could not close objects in checkTables method : "
+ex.toString());
* This method reads the specified text file and, returns the content
* as a string.
private String readFile()
throws FileNotFoundException, IOException{
// Read the file whose content has to be passed as String
BufferedReader br = new BufferedReader(new FileReader(fileName));
String nextLine = "";
StringBuffer sb = new StringBuffer();
while ((nextLine = br.readLine()) != null) {
sb.append(nextLine);
// Convert the content into to a string
String clobData = sb.toString();
// Return the data.
return clobData;
} -
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,
brI 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.
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How to read from excel file and write it using implicit jsp out object
our code is as below:Please give us proper solution.
we are reading from Excel file and writing in dynamicaly generated Excel file.it is writing but not as original excel sheet.we are using response.setContentType and response.setHeader for generating pop up for saveing the original file in to dynamically generated Excel file.
<%@ page contentType="application/vnd.ms-excel" %>
<%
//String dLoadFile = (String)request.getParameter("jspname1");
String dLoadFile = "c:/purge_trns_nav.xls" ;
File f = new File(dLoadFile);
//set the content type(can be excel/word/powerpoint etc..)
response.setContentType ("application/msexcel");
//get the file name
String name = f.getName().substring(f.getName().lastIndexOf("/") + 1,f.getName().length());
//set the header and also the Name by which user will be prompted to save
response.setHeader ("Content-Disposition", "attachment; filename="+name);
//OPen an input stream to the file and post the file contents thru the
//servlet output stream to the client m/c
FileInputStream in = new FileInputStream(f);
//ServletOutputStream outs = response.getOutputStream();
int bit = 10;
int i = 0;
try {
while (bit >= 0) {
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out.write(bit) ;
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out.flush();
out.close();
in.close();
%>If you want to copy files as fast as possible, without processing them (as the DOS "copy" or the Unix "cp" command), you can try the java.nio.channels package.
import java.nio.*;
import java.nio.channels.*;
import java.io.*;
import java.util.*;
import java.text.*;
class Kopy {
* @param args [0] = source filename
* args [1] = destination filename
public static void main(String[] args) throws Exception {
if (args.length != 2) {
System.err.println ("Syntax: java -cp . Kopy source destination");
System.exit(1);
File in = new File(args[0]);
long fileLength = in.length();
long t = System.currentTimeMillis();
FileInputStream fis = new FileInputStream (in);
FileOutputStream fos = new FileOutputStream (args[1]);
FileChannel fci = fis.getChannel();
FileChannel fco = fos.getChannel();
fco.transferFrom(fci, 0, fileLength);
fis.close();
fos.close();
t = System.currentTimeMillis() - t;
NumberFormat nf = new DecimalFormat("#,##0.00");
System.out.print (nf.format(fileLength/1024.0) + "kB copied");
if (t > 0) {
System.out.println (" in " + t + "ms: " + nf.format(fileLength / 1.024 / t) + " kB/s");
}
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