Converts CSV line to string array. - Java File Path IO

Java examples for File Path IO:CSV File

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Description

Converts CSV line to string array.

Demo Code

// Copyright (c) 2003-present, Jodd Team (jodd.org). All Rights Reserved.
import java.util.ArrayList;
import java.util.List;

public class Main{
    protected static final char FIELD_SEPARATOR = ',';
    protected static final char FIELD_QUOTE = '"';
    protected static final String DOUBLE_QUOTE = "\"\"";
    /**/*w  w w .j  a v  a2s .  co  m*/
     * Converts CSV line to string array.
     */
    public static String[] toStringArray(String line) {
        List<String> row = new ArrayList<String>();

        boolean inQuotedField = false;
        int fieldStart = 0;

        final int len = line.length();
        for (int i = 0; i < len; i++) {
            char c = line.charAt(i);
            if (c == FIELD_SEPARATOR) {
                if (!inQuotedField) { // ignore we are quoting
                    addField(row, line, fieldStart, i, inQuotedField);
                    fieldStart = i + 1;
                }
            } else if (c == FIELD_QUOTE) {
                if (inQuotedField) {
                    if (i + 1 == len
                            || line.charAt(i + 1) == FIELD_SEPARATOR) { // we are already quoting - peek to see if this is the end of the field
                        addField(row, line, fieldStart, i, inQuotedField);
                        fieldStart = i + 2;
                        i++; // and skip the comma
                        inQuotedField = false;
                    }
                } else if (fieldStart == i) {
                    inQuotedField = true; // this is a beginning of a quote
                    fieldStart++; // move field start
                }
            }
        }
        // add last field - but only if string was not empty
        if (len > 0 && fieldStart <= len) {
            addField(row, line, fieldStart, len, inQuotedField);
        }
        return row.toArray(new String[row.size()]);
    }
    private static void addField(List<String> row, String line,
            int startIndex, int endIndex, boolean inQuoted) {
        String field = line.substring(startIndex, endIndex);
        if (inQuoted) {
            field = StringUtil.replace(field, DOUBLE_QUOTE, "\"");
        }
        row.add(field);
    }
}

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