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CSVRE.javaAPI DocExample2154Sun Apr 25 15:43:32 BST 2004None

CSVRE

public class CSVRE extends Object

Fields Summary
public static final String
CSV_PATTERN
The rather involved pattern used to match CSV's consists of three alternations: the first matches aquoted field, the second unquoted, the third a null field.
private static Pattern
csvRE
Constructors Summary
public CSVRE()
Construct a regex-based CSV parser.

		csvRE = Pattern.compile(CSV_PATTERN);
Methods Summary
public static voidmain(java.lang.String[] argv)


	       
		System.out.println(CSV_PATTERN);
		new CSVRE().process(new BufferedReader(new InputStreamReader(System.in)));
public java.util.Listparse(java.lang.String line)
Parse one line.

return
List of Strings, minus their double quotes

		List list = new ArrayList();
		Matcher m = csvRE.matcher(line);
		// For each field
		while (m.find()) {
			String match = m.group();
			if (match == null)
				break;
			if (match.endsWith(",")) {	// trim trailing ,
				match = match.substring(0, match.length() - 1);
			}
			if (match.startsWith("\"")) { // assume also ends with
				match = match.substring(1, match.length() - 1);
			}
			if (match.length() == 0)
				match = null;
			list.add(match);
		}
		return list;
public voidprocess(java.io.BufferedReader in)
Process one file. Delegates to parse() a line at a time

		String line;

		// For each line...
		while ((line = in.readLine()) != null) {
			System.out.println("line = `" + line + "'");
			List l = parse(line);
			System.out.println("Found " + l.size() + " items.");
			for (int i = 0; i < l.size(); i++) {
				System.out.print(l.get(i) + ",");
			}
			System.out.println();
		}