I have a csv file and I have some data in it and I want to append a column in it. e.g:
Name,Age,Marks
Joe,15,1
Smith,20,2
I want to append that Marks Column through code. The problem I'm getting is
Name,Age,Marks
Joe,15
1
2
Smith,20
1
2
The data is getting written 2 times and also the on the first column (Except the first one). How can I prevent it from doing it ? I've been stuck in this problem from past 1 week
My code:
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
public class appendCol {
public static String appendingCol() {
String stringArray[] = {"Marks", "1", "2"};
StringBuilder sb = new StringBuilder();
for (int i = 0; i < stringArray.length; i++) {
sb.append(stringArray[i]);
}
String str = sb.toString();
return str;
}
public static void main(String[] args) throws IOException {
String line = "";
BufferedWriter writer = new BufferedWriter(new FileWriter("D:\\temp.csv"));
try (BufferedReader br = new BufferedReader(new FileReader("D:\\text1.csv"))) {
while ((line = br.readLine()) != null) {
String newFileLine = line + "," + appendingCol();
writer.write(newFileLine);
writer.newLine();
}
}
writer.close();
}
}
With this as input in text1.csv:
Name,Age
Joe,15
Smith,20
I ran (very tightly adapted from your code):
static void tryStackOverflow () {
String line = "";
try {
BufferedWriter writer = new BufferedWriter (new FileWriter ("temp.csv"));
BufferedReader br = new BufferedReader (new FileReader ("text1.csv"));
while ((line = br.readLine ()) != null) {
String newFileLine = line + "," + appendingCol ();
writer.write (newFileLine);
writer.newLine ();
}
writer.close ();
} catch (IOException excep) {
System.err.println ("Exception " + excep);
}
}
public static String appendingCol () {
String stringArray[] = { "Marks", "1", "2" };
StringBuilder sb = new StringBuilder ();
for (int i = 0; i < stringArray.length; i++) {
sb.append (stringArray [i]);
}
String str = sb.toString ();
return str;
}
and that produced:
Name,Age,Marks12
Joe,15,Marks12
Smith,20,Marks12
Then it seems clear that stringArray should be be in the other method (your main method) and added to line by line. Your code also assumes there are as many lines as elements in that array. But disregarding that, I moved the array and eliminated the appendingCol method and ran this:
static void tryStackOverflow () {
String line = "";
String stringArray[] = { "Marks", "1", "2" };
int lineNum = 0;
try {
BufferedWriter writer = new BufferedWriter (new FileWriter ("temp.csv"));
BufferedReader br = new BufferedReader (new FileReader ("text1.csv"));
while ((line = br.readLine ()) != null) {
String newFileLine = line + "," + stringArray [lineNum++];
writer.write (newFileLine);
writer.newLine ();
}
writer.close ();
} catch (IOException excep) {
System.err.println ("Exception " + excep);
}
}
which produced this:
Name,Age,Marks
Joe,15,1
Smith,20,2
The header needs to be handled separately from the values.
public static void main(String[] args) throws IOException {
Map<String, String[]> csvCol = new HashMap<String, String[]>();
String stringArray[] = { "1", "2" };
csvCol.put('Marks', stringArray);
String line = "";
BufferedWriter writer = new BufferedWriter(new FileWriter("D:\\temp.csv"));
try (BufferedReader br = new BufferedReader(new FileReader("D:\\text1.csv"))) {
String headers = "";
String values = "";
String newFileLine ="";
bool isHeader=true;
while ((line = br.readLine()) != null) {
if(isHeader){
csvCol.forEach((k,v) -> {
headers = "," + k ;
});
newFileLine = line + headers ;
}else{
csvCol.forEach((k,v) -> {
values = "," + v ;
});
newFileLine = line + values;
isHeader = false;
}
writer.write(newFileLine);
writer.newLine();
}
}
writer.close();
}
This problem requires one more column to be appended to the original CSV. The Java implementation is longer in code. However, it is easy to write with the open-source package SPL under Java, as long as one sentence:
+
A
1
=file("temp.csv").export#wc(file("test1.csv").import#wc().(~|="Marks,1,2".split#c()(#)))
SPL provides JDBC for JAVA to call, save the above script as append.splx, and call the script file as a stored procedure in JAVA:
…
Class.forName("com.esproc.jdbc.InternalDriver");
con= DriverManager.getConnection("jdbc:esproc:local://");
st=con.prepareCall("call append()");
st.execute();
…
Or directly execute the SPL string in SQL in JAVA:
…
st = con.prepareStatement("==file(\"temp.csv\").export#wc(file(\"test1.csv\")
.import#wc().(~|=\"Marks,1,2\".split#c()(#)))");
st.execute();
…
Related
I know there are many similar questions here, but I still can't solve it. I can get all the results that I want. However, in the end, it still shows nullpointerexception. I don't know why. can anyone help?
public class PointGenterate {
public static void main(String[] args) throws FileNotFoundException {
// TODO Auto-generated method stub
try{
File file = new File("123.txt");
double[] pointsid = new double[10];
String[] data = null;
for(int i = 0; i <10; i++){
double rn = (int)(Math.random()*120);
System.out.println(rn);
pointsid[i] = rn;
}
//read file
InputStreamReader rs = new InputStreamReader(new FileInputStream(file));//create input stream reader object
BufferedReader br = new BufferedReader(rs);
String line = "";
line = br.readLine();
//
File write = new File("output.KML");
write.createNewFile();
BufferedWriter out = new BufferedWriter(new FileWriter(write));
while(line != null){
line = br.readLine();
if(line==" "){
System.out.print("empty");
}else{
data = line.split(",|:|[|]");
}
for(int i = 0; i < data.length; i++){
data[i] = data[i].trim();
System.out.println(data[i] + "num" + i);
}
if(data.length > 15){
double id = Double.parseDouble(data[4]);
for(int i = 0; i <10; i++){
if(id == pointsid[i]){
data[10] = data[10].substring(0, data[10].length()-2);
data[15] = data[15].substring(1,data[15].length());
data[16] = data[16].substring(0, data[16].length()-6);
out.write(data[8]+" "+ data[10]+ " " + data[13] + data[15] + data[16]+ "\r\n");
out.flush();
}
}
}
//System.out.println(line);
}
out.close();
}
catch(Exception e){
e.printStackTrace();
}
}
}
the txt file format is like
{ "type": "Feature", "properties": { "id": 126.000000, "osm_id": 4851918786.000000, "name": "Moray House Library", "type": "library" }, "geometry": { "type": "Point", "coordinates": [ -3.180841771200988, 55.950622362732418 ] } },
this is one line. I have many lines, and actually this is just a test code. if it works. i want to write it as a method in a javaseverlet class. get the string coordinates and return it to my JS font-end.
There's a few issues with your code. In this section:
InputStreamReader rs = new InputStreamReader(new FileInputStream(file));//create input stream reader object
BufferedReader br = new BufferedReader(rs);
String line = "";
line = br.readLine(); // here you read the first line in the file
//
File write = new File("output.KML");
write.createNewFile();
BufferedWriter out = new BufferedWriter(new FileWriter(write));
while(line != null){ // here you check that it's not null (it's not, you read the first line OK)
line = br.readLine(); // here you read the second line (there is no second line, now line is null)
if(line==" "){ // now you check if the line is a space character (this is wrong for 2 reasons, that's not how you compare strings, and a space character is not an empty string)
System.out.print("empty");
}else{
data = line.split(",|:|[|]"); // here you call split() on line but line is null
}
When you checked if the string was empty, you did line == " " which is wrong for 2 reasons. First you cannot use == to compare strings - read this question for details on why not. Second, " " is a string that contains a space character. "" is an empty string.
When you want to check if a string is empty you can do it like this:
line.equals("")
or like this:
line.isEmpty()
Here's your code with a few small changes so that it runs without throwing an exception.
public class PointGenterate {
public static void main(String[] args) throws Exception {
try {
File file = new File("123.txt");
double[] pointsid = new double[10];
String[] data = null;
for(int i = 0; i < 10; i++){
double rn = (int)(Math.random()*120);
System.out.println(rn);
pointsid[i] = rn;
}
//read file
InputStreamReader rs = new InputStreamReader(new FileInputStream(file));//create input stream reader object
BufferedReader br = new BufferedReader(rs);
String line = "";
//
File write = new File("output.KML");
write.createNewFile();
BufferedWriter out = new BufferedWriter(new FileWriter(write));
while((line = br.readLine()) != null){ // read the line and check for null
if(line.isEmpty()) { // is the line equal to the empty string?
System.out.print("empty");
} else {
data = line.split(",|:|[|]");
}
for(int i = 0; i < data.length; i++){
data[i] = data[i].trim();
System.out.println(data[i] + "num" + i);
}
if(data.length > 15){
double id = Double.parseDouble(data[4]);
for(int i = 0; i <10; i++){
if(id == pointsid[i]){
data[10] = data[10].substring(0, data[10].length()-2);
data[15] = data[15].substring(1,data[15].length());
data[16] = data[16].substring(0, data[16].length()-6);
out.write(data[8]+" "+ data[10]+ " " + data[13] + data[15] + data[16]+ "\r\n");
out.flush();
}
}
}
//System.out.println(line);
}
out.close();
}
catch(Exception e){
e.printStackTrace();
}
}
}
I have some CSV file with the same column header.
I want to make them to one file.So I found something similar to me. Link is Merge CSV files into a single file with no repeated headers.
but I want to return the data as a String, but this code has no return.
I try to modify that. but I failed.
I want to put the data from several csv into one variable.
String[] headers = null;
String firstFile = "/path/to/firstFile.dat";
Scanner scanner = new Scanner(new File(firstFile));
if (scanner.hasNextLine())
headers[] = scanner.nextLine().split(",");
scanner.close();
Iterator<File> iterFiles = listOfFilesToBeMerged.iterator();
BufferedWriter writer = new BufferedWriter(new FileWriter(firstFile, true));
while (iterFiles.hasNext()) {
File nextFile = iterFiles.next();
BufferedReader reader = new BufferedReader(new FileReader(nextFile));
String line = null;
String[] firstLine = null;
if ((line = reader.readLine()) != null)
firstLine = line.split(",");
if (!Arrays.equals (headers, firstLine))
throw new FileMergeException("Header mis-match between CSV files: '" +
firstFile + "' and '" + nextFile.getAbsolutePath());
while ((line = reader.readLine()) != null) {
writer.write(line);
writer.newLine();
}
reader.close();
}
writer.close();
Here is what you might be looking for.
I have read two csv files and written into one.
Hope this is use full...
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
public class CombineTwoFile
{
public static void main(String[] args) throws IOException
{
ArrayList<String> list = new ArrayList<String>();
try
{
BufferedReader br = new BufferedReader(new FileReader( "d:\\1\\1.csv"));
BufferedReader r = new BufferedReader(new FileReader( "d:\\1\\2.csv"));
String s1 =null;
String s2 = null;
while ((s1 = br.readLine()) != null)
{
list.add(s1);
}
while((s2 = r.readLine()) != null)
{
list.add(s2);
}
}
catch (IOException e)
{
e.printStackTrace();
}
BufferedWriter writer=null;
writer = new BufferedWriter(new FileWriter("d:\\1\\good.csv"));
String listWord;
for (int i = 0; i< list.size(); i++)
{
listWord = list.get(i);
writer.write(listWord);
writer.write("\n");
}
System.out.println("DONE Enjoy!!");
writer.close();
}
}
Or if you looking for a function which returns String combining two csv
public static String combineCSV() {
ArrayList<String> list = new ArrayList<String>();
try {
BufferedReader br = new BufferedReader(new FileReader(
"d:\\1\\1.csv"));
BufferedReader r = new BufferedReader(
new FileReader("d:\\1\\2.csv"));
String s1 = null;
String s2 = null;
while ((s1 = br.readLine()) != null) {
list.add(s1);
}
while ((s2 = r.readLine()) != null) {
list.add(s2);
}
} catch (IOException e) {
e.printStackTrace();
}
String listWord;
StringBuffer objBuffer = new StringBuffer();
for (int i = 0; i < list.size(); i++) {
listWord = list.get(i);
objBuffer.append(listWord);
objBuffer.append("\n");
}
System.out.println("DONE Enjoy!!");
System.out.println(objBuffer);
return objBuffer.toString();
}
Thank you!!!!
Enjoy Coding...
Another alternative is to use Open CSV library
I have a CSV log file and it contains many rows like this:
2016-06-21 12:00:00,000 : helloworld: header1=2;header2=6;header=0
I want to write them to a new CSV file.
public void readLogFile() throws Exception
{
String currentLine = "";
String nextLine = "";
BufferedReader reader = new BufferedReader(new FileReader(file(false)));
while ((currentLine = reader.readLine()) != null)
{
if (currentLine.contains("2016") == true)
{
nextLine = reader.readLine();
if (nextLine.contains("helloworld") == true)
{
currentLine = currentLine.substring(0, 23);
nextLine = nextLine.substring(22, nextLine.length());
String nextBlock = replaceAll(nextLine);
System.out.println(currentLine + " : helloworld: " + nextBlock);
String[] data = nextBlock.split(";");
for (int i = 0, max = data.length; i < max; i++)
{
String[] d = data[i].split("=");
map.put(d[0], d[1]);
}
}
}
}
reader.close();
}
This is my method to write the content:
public void writeContentToCsv() throws Exception
{
FileWriter writer = new FileWriter(".../file_new.csv");
for (Map.Entry<String, String> entry : map.entrySet())
{
writer.append(entry.getKey()).append(";").append(entry.getValue()).append(System.getProperty("line.separator"));
}
writer.close();
}
This is the output I want to have:
header1; header2; header3
2;6;0
1;5;1
5;8;8
...
Currently, the CSV file looks like this (only showing one dataset):
header1;4
header2;0
header3;0
Can anyone help me fix the code?
Create a class to store the header values, and store it in the list.
Iterate over the list to save the results.
The currently used map can only store 2 values (which it is storing the header value (name its corresponding value)
map.put(d[0], d[1]);
here d[0] will be header1 and d[1] will be 4 (but we want only 4 from here)
class Headervalues {
String[] header = new String[3];
}
public void readLogFile() throws Exception
{
List<HeaderValues> list = new ArrayList<>();
String currentLine = "";
BufferedReader reader = new BufferedReader(new FileReader(file(false)));
while ((currentLine = reader.readLine()) != null)
{
if (currentLine.contains("2016") && currentLine.contains("helloworld"))
{
String nextBlock = replaceAll(currentLine.substring(22, currentLine.length());
String[] data = nextBlock.split(";");
HeaderValues headerValues = new HeaderValues();
//Assuming data.length will always be 3.
for (int i = 0, max = data.length; i < max; i++)
{
String[] d = data[i].split("=");
//Assuming split will always have size 2
headerValues.header[i] = d[1];
}
list.add(headerValues)
}
}
}
reader.close();
}
public void writeContentToCsv() throws Exception
{
FileWriter writer = new FileWriter(".../file_new.csv");
for (HeaderValues value : headerValues)
{
writer.append(value.header[0]).append(";").append(value.header[1]).append(";").append(value.header[2]);
}
writer.close();
}
For writing to CSV
public void writeCSV() {
// Delimiter used in CSV file
private static final String NEW_LINE_SEPARATOR = "\n";
// CSV file header
private static final Object[] FILE_HEADER = { "Empoyee Name","Empoyee Code", "In Time", "Out Time", "Duration", "Is Working Day" };
String fileName = "fileName.csv");
List<Objects> objects = new ArrayList<Objects>();
FileWriter fileWriter = null;
CSVPrinter csvFilePrinter = null;
// Create the CSVFormat object with "\n" as a record delimiter
CSVFormat csvFileFormat = CSVFormat.DEFAULT.withRecordSeparator(NEW_LINE_SEPARATOR);
try {
fileWriter = new FileWriter(fileName);
csvFilePrinter = new CSVPrinter(fileWriter, csvFileFormat);
csvFilePrinter.printRecord(FILE_HEADER);
// Write a new student object list to the CSV file
for (Object object : objects) {
List<String> record = new ArrayList<String>();
record.add(object.getValue1().toString());
record.add(object.getValue2().toString());
record.add(object.getValue3().toString());
csvFilePrinter.printRecord(record);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
fileWriter.flush();
fileWriter.close();
csvFilePrinter.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
Read and write/append CSV file using org.apache.commons.csv.CSVParser.
public void appendCSV(){
String [] records = {};
String csvWrite= "";
Boolean status = false;
try(BufferedReader csvReaders = new BufferedReader(new FileReader("csvfile.csv"));
CSVParser parser = CSVFormat.DEFAULT.withDelimiter(',').withHeader().parse(csvReaders);
) {
for(CSVRecord record : parser) {
status= record.get("Microservice").equalsIgnoreCase(apipath);
int status_code=0;
String httpMethod = record.get("Method");
if(status==true) {
csvWrite = record.get("apiName")+"-"+record.get("Microservice")+"-"+record.get("R_Data")+"-"+record.get("Method")+"-"+record.get("A_Status")+"-"+400+"-"+record.get("A_Response")+"-"+"{}";
records = csvWrite.split("-");
CSVWriter writer = new CSVWriter(new FileWriter(pathTowritecsv,true));
writer.writeNext(records);
writer.close();
}else {
}
}
}
catch (Exception e) {
System.out.println(e);
}
}
I'm trying to read data from a text file and create Item Objects with it.
Item Objects have fields String title, String formatt, boolean onLoan, String loanedTo and String dateLoaned. In my save()method, I print every object to a text file in a new line and the fields are seperated by "$" (dollar sign). How can I read the text file line by line and create a new object from each line and add it to an array.
TextFile Example:
StarWars$DVD$false$null$null
Aliens$Bluray$true$John$Monday
public void save() {
String[] array2 = listForSave();
PrintWriter printer = null;
try {
printer = new PrintWriter(file);
for (String o : array2) {
printer.println(o);
}
printer.close();
} catch ( IOException e ) {
e.printStackTrace();
}
}
public void open(){
try{
FileReader fileReader = new FileReader(file);
BufferedReader bufferedReader = new BufferedReader(fileReader);
StringBuffer stringBuffer = new StringBuffer();
String line;
while ((line = bufferedReader.readLine()) != null) {
stringBuffer.append(line);
stringBuffer.append("\n");
}
fileReader.close();
System.out.println("Contents of file:");
System.out.println(stringBuffer.toString());
}catch ( IOException e ) {
e.printStackTrace();
}
}
Thanks everyone. Here's my final code:
public void open(){
try{
FileReader fileReader = new FileReader(file);
BufferedReader bufferedReader = new BufferedReader(fileReader);
String line;
String[] strings;
while ((line = bufferedReader.readLine()) != null) {
strings = line.split("\\$");
String title = strings[0];
String format = strings[1];
boolean onLoan = Boolean.parseBoolean(strings[2]);
String loanedTo = strings[3];
String dateLoaned = strings[4];
MediaItem superItem = new MediaItem(title,format, onLoan,loanedTo,dateLoaned);
items.add(superItem);
}
fileReader.close();
}catch ( IOException e ) {
e.printStackTrace();
}
}
String line = // input line e.g. "Aliens$Bluray$true$John$Monday"
String[] strings = line.split("\\$"); // use regex matching "$" to split
String title = strings[0];
String formatt = strings[1];
boolean onLoan = Boolean.parseBoolean(strings[2]);
String loanedTo = strings[3];
String dateLoaned = strings[4];
// TODO: create object from those values
Maybe you need to handle null differently (in case you want the String "null" to be converted to null); note that you can't distinguish if null or "null" was saved.
This function converts "null" to null and returns the same string otherwise:
String convert(String s) {
return s.equals("null") ? null : s;
}
Reading the objects to an array
Since you don't know the number of elements before reading all lines, you have to work around that:
Write the number of objects in the file as first line, which would allow you to create the array before reading the first object. (Use Integer.parseInt(String) to convert the first line to int):
public void save() {
String[] array2 = listForSave();
PrintWriter printer = null;
try {
printer = new PrintWriter(file);
printer.println(array2.length);
for (String o : array2) {
printer.println(o);
}
printer.close();
} catch ( IOException e ) {
e.printStackTrace();
}
}
public void open(){
try{
FileReader fileReader = new FileReader(file);
BufferedReader bufferedReader = new BufferedReader(fileReader);
StringBuffer stringBuffer = new StringBuffer();
int arraySize = Integer.parseInt(stringBuffer.readLine());
Object[] array = new Object[arraySize];
int index = 0;
String line;
while ((line = bufferedReader.readLine()) != null) {
// split line and create Object (see above)
Object o = // ...
array[index++] = o;
}
//...
}catch ( IOException e ) {
e.printStackTrace();
}
//...
}
or
Use a Collection, e.g. ArrayList to store the objects and use List.toArray(T[]) to get an array.
quick and dirty solution might be...
public void open(){
try{
ArrayList<Item> list = new ArrayList<Item>(); //Array of your ItemObject
FileReader fileReader = new FileReader(file);
BufferedReader bufferedReader = new BufferedReader(fileReader);
StringBuffer stringBuffer = new StringBuffer();
String line;
while ((line = bufferedReader.readLine()) != null) {
Item itm = new Item(); //New Item Object
String [] splitLine = line.split("\\$");
item.title = splitLine[0];
item.format = splitLine[1];
item.onLoan = Boolean.parseBoolean(splitLine[2]);
item.loanedTo = splitLine[3];
item.dateLoaned = splitLine[4];
list.add(itm);
stringBuffer.append(line);
stringBuffer.append("\n");
}
fileReader.close();
System.out.println("Contents of file:");
System.out.println(stringBuffer.toString());
}catch ( IOException e ) {
e.printStackTrace();
}
}
But this is won't scale if you need to re-arrange or add new fields.
You could try this to "parse" every line of your file
String[] result = "StarWars$DVD$false$null$null".split("\\$");
for (int i=0; i<result.length; i++) {
String field = result[i]
... put the strings in your object ...
}
I am getting a really long string as the response of the web service I am collecting it in the using the StringBuilder but I am unable to obtain the full value I also used StringBuffer but had no success.
Here is the code I am using:
private static String read(InputStream in ) throws IOException {
//StringBuilder sb = new StringBuilder(1000);
StringBuffer sb = new StringBuffer();
String s = "";
BufferedReader r = new BufferedReader(new InputStreamReader( in ), 1000);
for (String line = r.readLine(); line != null; line = r.readLine()) {
sb.append(line);
s += line;
} in .close();
System.out.println("Response from Input Stream Reader >>>" + sb.toString());
System.out.println("Response from Input S >>>>>>>>>>>>" + s);
return sb.toString();
}
Any help is appreciated.
You can also split the string in array of strings in order to see all of them
String delimiter = "put a delimiter here e.g.: \n";
String[] datas=sb.toString().split(delimiter);
for(String string datas){
System.out.println("Response from Input S >>>>>>>>>>>>" + string);
}
The String may not print entirely to the console, but it is actually there. Save it to a file in order to see it.
I do not think that your input is too big for a String, but only not shown to the console because it doesn't accept too long lines. Anyways, here is the solution for a really huge input as characters:
private static String[] readHugeStream(InputStream in) throws IOException {
LinkedList<String> dataList = new LinkedList<>();
boolean finished = false;
//
BufferedReader r = new BufferedReader(new InputStreamReader(in), 0xFFFFFF);
String line = r.readLine();
while (!finished) {
int lengthRead = 0;
StringBuilder sb = new StringBuilder();
while (!finished) {
line = r.readLine();
if (line == null) {
finished = true;
} else {
lengthRead += line.length();
if (lengthRead == Integer.MAX_VALUE) {
break;
}
sb.append(line);
}
}
if (sb.length() != 0) {
dataList.add(sb.toString());
}
}
in.close();
String[] data = dataList.toArray(new String[]{});
///
return data;
}
public static void main(String[] args) {
try {
String[] data = readHugeStream(new FileInputStream("<big file>"));
} catch (IOException ex) {
Logger.getLogger(StackoverflowStringLong.class.getName()).log(Level.SEVERE, null, ex);
} catch (OutOfMemoryError ex) {
System.out.println("out of memory...");
}
}
System.out.println() does not print all the characters , it can display only limited number of characters in console. You can create a file in SD card and copy the string there as a text document to check your exact response.
try
{
File root = new File(Environment.getExternalStorageDirectory(), "Responsefromserver");
if (!root.exists())
{
root.mkdirs();
}
File gpxfile = new File(root, "response.txt");
FileWriter writer = new FileWriter(gpxfile);
writer.append(totalResponse);
writer.flush();
writer.close();
}
catch(IOException e)
{
System.out.println("Error:::::::::::::"+e.getMessage());
throw e;
}