de.alpharogroup.file.csv

Class CsvFileUtils

java.lang.Object

de.alpharogroup.file.csv.CsvFileUtils

public final class CsvFileUtils
extends Object

Utility class for the use of cvs-files.

Version:

1.0

Author:

Asterios Raptis

Method Summary

Modifier and Type	Method and Description
static List<String>	formatKommaSeperatedFileToList(File input, String encoding) Reads every line from the File splits the data through a comma and puts them to the List.
static void	formatToCSV(File input, File output, String encoding) Formats a file that has in every line one input-data into a csv-file.
static List<Map<String,String>>	getCvsAsListMap(File input) Gets the given cvs file as list of maps.
static String[]	getDataFromLine(String line, String seperator) Gets the data from line.
static String[]	getDataFromLine(String line, String seperator, boolean trim) Gets the data from line.
static int	getLineCountFromCsvFile(File file) Gets the line count from csv file.
static List<String>	readDataFromCVSFileToList(File input, int position, boolean putFirstLine, String encoding) Reads from a csv-file the field from the given position and puts them to the List.
static List<String>	readDataFromCVSFileToList(File input, int position, boolean putFirstLine, String splitChar, String encoding) Reads from a csv-file the field from the given position and puts them to the List.
static Properties	readFilelistToProperties(File input) Read filelist to properties.
static List<String>	readFileToList(File file) Reads every line from the given File into a List and returns the List.
static List<String>	readFileToList(File file, String encoding) Reads every line from the given File into a List and returns the List.
static List<String[]>	readFileToList(File file, String seperator, String encoding) Reads every line from the given File into a List of String arrays and returns the List.
static List<String>	readLinesInList(File input, String encoding) Reads every line from the File and puts them to the List.
static String[]	sortData(File csvData, String encoding) Read an csv-file and puts them in a String-array.
static void	storeFilelistToProperties(File output, File input, String comments) Stores a komma seperated file to a properties object.
static void	writeLines(File output, Set<String> values, String encoding) Writes the toString() value of each item in a collection to the specified File line by line.
static void	writeLinesToFile(Collection<String> collection, File output, String encoding) Writes all the String-object in the collection into the given file.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

formatKommaSeperatedFileToList

public static List<String> formatKommaSeperatedFileToList(File input,
                                                          String encoding)

Reads every line from the File splits the data through a comma and puts them to the List.

Parameters:

input - The File from where the input comes.

encoding - The encoding from the file.

Returns:

The List with all lines from the file.

formatToCSV

public static void formatToCSV(File input,
                               File output,
                               String encoding)
                        throws IOException

Formats a file that has in every line one input-data into a csv-file.

Parameters:

input - The input-file to format. The current format from the file is every data in a line.

output - The file where the formatted data should be inserted.

encoding - the encoding

Throws:

IOException - When an io error occurs.

getCvsAsListMap

public static List<Map<String,String>> getCvsAsListMap(File input)
                                                throws IOException

Gets the given cvs file as list of maps. Every map has as key the header from the column and the corresponding value for this line.

Parameters:

input - the input

Returns:

the cvs as list map

Throws:

IOException - Signals that an I/O exception has occurred.

getDataFromLine

public static String[] getDataFromLine(String line,
                                       String seperator)

Gets the data from line.

Parameters:

line - the line

seperator - the seperator

Returns:

the data from line

getDataFromLine

public static String[] getDataFromLine(String line,
                                       String seperator,
                                       boolean trim)

Gets the data from line.

Parameters:

line - the line

seperator - the seperator

trim - the trim

Returns:

the data from line

getLineCountFromCsvFile

public static int getLineCountFromCsvFile(File file)
                                   throws IOException

Gets the line count from csv file.

Parameters:

file - the file

Returns:

the line count from csv file

Throws:

IOException - Signals that an I/O exception has occurred.

readDataFromCVSFileToList

public static List<String> readDataFromCVSFileToList(File input,
                                                     int position,
                                                     boolean putFirstLine,
                                                     String encoding)
                                              throws IOException

Reads from a csv-file the field from the given position and puts them to the List.

Parameters:

input - The input-file.

position - The position from the field.

putFirstLine - Flag that tells if the first line will be put in the list.

encoding - the encoding

Returns:

The list with the data.

Throws:

IOException - When a io-problem occurs.

readDataFromCVSFileToList

public static List<String> readDataFromCVSFileToList(File input,
                                                     int position,
                                                     boolean putFirstLine,
                                                     String splitChar,
                                                     String encoding)
                                              throws IOException

Reads from a csv-file the field from the given position and puts them to the List.

Parameters:

input - The input-file.

position - The position from the field.

putFirstLine - Flag that tells if the first line will be put in the list.

splitChar - the split char

encoding - the encoding

Returns:

The list with the data.

Throws:

IOException - When a io-problem occurs.

readFilelistToProperties

public static Properties readFilelistToProperties(File input)
                                           throws IOException

Read filelist to properties.

Parameters:

input - the input

Returns:

the properties

Throws:

IOException - Signals that an I/O exception has occurred.

readFileToList

public static List<String> readFileToList(File file)
                                   throws IOException

Reads every line from the given File into a List and returns the List.

Parameters:

file - The file from where to read.

Returns:

The List with all lines from the File.

Throws:

IOException - When a io-problem occurs.

readFileToList

public static List<String> readFileToList(File file,
                                          String encoding)
                                   throws IOException

Reads every line from the given File into a List and returns the List.

Parameters:

file - The file from where to read.

encoding - The encoding to read.

Returns:

The List with all lines from the File.

Throws:

IOException - When a io-problem occurs.

readFileToList

public static List<String[]> readFileToList(File file,
                                            String seperator,
                                            String encoding)
                                     throws IOException

Reads every line from the given File into a List of String arrays and returns the List.

Parameters:

file - The file from where to read.

seperator - the seperator

encoding - The encoding to read.

Returns:

The List with all lines from the File.

Throws:

IOException - Signals that an I/O exception has occurred.

readLinesInList

public static List<String> readLinesInList(File input,
                                           String encoding)
                                    throws IOException

Reads every line from the File and puts them to the List.

Parameters:

input - The File from where the input comes.

encoding - The encoding from the file.

Returns:

The List with all lines from the file.

Throws:

IOException - When a io-problem occurs.

sortData

public static String[] sortData(File csvData,
                                String encoding)
                         throws FileNotFoundException,
                                IOException

Read an csv-file and puts them in a String-array.

Parameters:

csvData - The csv-file with the data.

encoding - The encoding to read.

Returns:

The data from the csv-file as a String-array.

Throws:

FileNotFoundException - the file not found exception

IOException - When an io-error occurs.

storeFilelistToProperties

public static void storeFilelistToProperties(File output,
                                             File input,
                                             String comments)
                                      throws IOException

Stores a komma seperated file to a properties object. As key is the number from the counter.

Parameters:

output - the output

input - the input

comments - the comments

Throws:

IOException - Signals that an I/O exception has occurred.

writeLines

public static void writeLines(File output,
                              Set<String> values,
                              String encoding)
                       throws IOException

Writes the toString() value of each item in a collection to the specified File line by line. The default VM encoding and the default line ending will be used.

Parameters:

output - The File where the values to save.

values - The Set with the values to put into the file.

encoding - The encoding from the file.

Throws:

IOException - When a io-problem occurs.

writeLinesToFile

public static void writeLinesToFile(Collection<String> collection,
                                    File output,
                                    String encoding)

Writes all the String-object in the collection into the given file.

Parameters:

collection - The collection with the String-object.

output - The file where the String-object will be writing.

encoding - The encoding from the file.