Package com.opencsv

Class CSVWriter

java.lang.Object

com.opencsv.AbstractCSVWriter

com.opencsv.CSVWriter

All Implemented Interfaces:

ICSVWriter, Closeable, Flushable, AutoCloseable

public class CSVWriter
extends AbstractCSVWriter

A very simple CSV writer released under a commercial-friendly license.

Field Summary

Fields

Modifier and Type	Field	Description
protected final char	escapechar
protected final char	quotechar
protected final char	separator

Fields inherited from class com.opencsv.AbstractCSVWriter

exception, lineEnd, resultService, writer

Fields inherited from interface com.opencsv.ICSVWriter

DEFAULT_ESCAPE_CHARACTER, DEFAULT_LINE_END, DEFAULT_QUOTE_CHARACTER, DEFAULT_SEPARATOR, INITIAL_STRING_SIZE, NO_ESCAPE_CHARACTER, NO_QUOTE_CHARACTER, RFC4180_LINE_END

Constructor Summary

Constructors

Constructor	Description
CSVWriter(Writer writer)	Constructs CSVWriter using a comma for the separator.
CSVWriter(Writer writer, char separator, char quotechar, char escapechar, String lineEnd)	Constructs CSVWriter with supplied separator, quote char, escape char and line ending.

Method Summary

Modifier and Type	Method	Description
private void	appendQuoteCharacterIfNeeded(boolean applyQuotesToAll, Appendable appendable, Boolean stringContainsSpecialCharacters)
protected boolean	checkCharactersToEscape(char nextChar)	Checks whether the next character that is to be written out is a special character that must be quoted.
protected void	processCharacter(Appendable appendable, char nextChar)	Appends the character to the StringBuilder adding the escape character if needed.
protected void	processLine(String nextElement, Appendable appendable)	Processes all the characters in a line.
protected boolean	stringContainsSpecialCharacters(String line)	Checks to see if the line contains special characters.
protected void	writeNext(String[] nextLine, boolean applyQuotesToAll, Appendable appendable)	Writes the next line to the file.

Methods inherited from class com.opencsv.AbstractCSVWriter

checkError, close, flush, getException, resetError, resultService, setResultService, writeAll, writeAll, writeColumnNames, writeNext

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.opencsv.ICSVWriter

flushQuietly, writeAll, writeAll, writeAll, writeAll, writeAll, writeNext

Field Details

separator

protected final char separator

quotechar

protected final char quotechar

escapechar

protected final char escapechar

Constructor Details

CSVWriter

public CSVWriter(Writer writer)

Constructs CSVWriter using a comma for the separator.

Parameters:

writer - The writer to an underlying CSV source.

CSVWriter

public CSVWriter(Writer writer,
 char separator,
 char quotechar,
 char escapechar,
 String lineEnd)

Constructs CSVWriter with supplied separator, quote char, escape char and line ending.

Parameters:

writer - The writer to an underlying CSV source.

separator - The delimiter to use for separating entries

quotechar - The character to use for quoted elements

escapechar - The character to use for escaping quotechars or escapechars

lineEnd - The line feed terminator to use

Method Details

writeNext

protected void writeNext(String[] nextLine,
 boolean applyQuotesToAll,
 Appendable appendable)
                  throws IOException

Description copied from class: AbstractCSVWriter

Writes the next line to the file. This method is a fail-fast method that will throw the IOException of the writer supplied to the CSVWriter (if the Writer does not handle the exceptions itself like the PrintWriter class).

Specified by:

writeNext in class AbstractCSVWriter

Parameters:

nextLine - a string array with each comma-separated element as a separate entry.

applyQuotesToAll - true if all values are to be quoted. false applies quotes only to values which contain the separator, escape, quote or new line characters.

appendable - Appendable used as buffer.

Throws:

IOException - Exceptions thrown by the writer supplied to CSVWriter.

appendQuoteCharacterIfNeeded

private void appendQuoteCharacterIfNeeded(boolean applyQuotesToAll,
 Appendable appendable,
 Boolean stringContainsSpecialCharacters)
                                   throws IOException

Throws:

IOException

stringContainsSpecialCharacters

protected boolean stringContainsSpecialCharacters(String line)

Checks to see if the line contains special characters.

Parameters:

line - Element of data to check for special characters.

Returns:

True if the line contains the quote, escape, separator, newline, or return.

processLine

protected void processLine(String nextElement,
 Appendable appendable)
                    throws IOException

Processes all the characters in a line.

Parameters:

nextElement - Element to process.

appendable - - Appendable holding the processed data.

Throws:

IOException - - IOException thrown by the writer supplied to the CSVWriter

processCharacter

protected void processCharacter(Appendable appendable,
 char nextChar)
                         throws IOException

Appends the character to the StringBuilder adding the escape character if needed.

Parameters:

appendable - - Appendable holding the processed data.

nextChar - Character to process

Throws:

IOException - - IOException thrown by the writer supplied to the CSVWriter.

checkCharactersToEscape

protected boolean checkCharactersToEscape(char nextChar)

Checks whether the next character that is to be written out is a special character that must be quoted. The quote character, escape charater, and separator are special characters.

Parameters:

nextChar - The next character to be written

Returns:

Whether the character needs to be quoted or not