Java String Split split(String content)

Description

Split the given content by comma.

License

Open Source License

Parameter

Parameter	Description
content	the content to split

Return

the array containing individual parts of the content

Declaration

public static String[] split(String content) 

Method Source Code

//package com.java2s;

import java.util.ArrayList;
import java.util.Arrays;

import java.util.List;

public class Main {
    /**//  w w w  .j a v a 2s. c  o  m
     * Split the given content by comma. However if a part of the content is in quotes, that part should not be split if
     * it contains any commas. For example foo,bar will be returned as an array of length 2; "foo,bar" will be returned
     * as an array of 1.
     *
     * @param content the content to split
     * @return the array containing individual parts of the content
     */
    public static String[] split(String content) {
        content = content.trim();
        int idx = content.indexOf(',');
        if (idx < 0) {
            return new String[] { content };
        } else if (content.indexOf('"') < 0) {
            return content.split("\\,", -1);
        } else {
            List<String> parts = new ArrayList<>();

            while (true) {
                idx = content.indexOf(',');
                int quote = content.indexOf('"');
                int quote2 = content.indexOf('"', quote + 1);
                if (quote > -1 && quote2 < 0) {
                    // something is wrong - only one quote
                    return null;
                } else if (quote < 0) {
                    parts.addAll(Arrays.asList(content.split("\\,", -1)));
                    break;
                }

                if (quote < idx) {
                    // started with a quote
                    parts.add(content.substring(1, quote2).trim());
                } else if (quote > idx) {
                    // quoted part is in between
                    String firstPart = content.substring(0, quote - 1).trim();
                    parts.addAll(Arrays.asList(firstPart.split("\\,", -1)));
                    String secondPart = content.substring(quote + 1, quote2).trim();
                    parts.add(secondPart);
                }
                if (content.length() > quote2 + 1) {
                    content = content.substring(quote2 + 1).trim();
                    if (content.charAt(0) == ',') {
                        content = content.substring(1);
                    } else {
                        return null;
                    }
                } else {
                    break;
                }
            }
            return parts.toArray(new String[parts.size()]);
        }
    }

    /**
     * Trim the data of leading and trailing quotes and white spaces.
     *
     * @param value the value to trim
     * @return trimmed value
     */
    private static String trim(String valueToTrim) {
        String value = valueToTrim.trim();
        if (!value.isEmpty() && value.charAt(0) == '"') {
            value = value.substring(1, value.length() - 1).trim();
        }
        return value;
    }
}

Related

1. split(final String toSplit)
2. split(Iterable objects, boolean even)
3. split(String arg)
4. split(String candidate)
5. split(String cmd)
6. Split(String content, String sub_seq)
7. split(String input)
8. split(String input)
9. split(String input)