string分割

public final static String[] split(String source, String delimiter, boolean ignoreBlank)
    {
        if (org.apache.commons.lang.StringUtils.isBlank(source))
        {
            return null;
        }
       
        if (org.apache.commons.lang.StringUtils.isEmpty(delimiter))
        {
            return new String[]{source};
        }
       
        int delimLength = delimiter.length();
       
        List<String> delimList = new ArrayList<String>();
        int lastOffset = 0;
        int offset = source.indexOf(delimiter);
        while (offset >= 0)
        {
            String dest = source.substring(lastOffset, offset);
            if (!ignoreBlank || !org.apache.commons.lang.StringUtils.isBlank(dest))
            {
                delimList.add(dest);
            }
            lastOffset = offset + delimLength;
            offset = source.indexOf(delimiter, lastOffset);
        }
       
        if (lastOffset <= source.length())
        {
            String dest = source.substring(lastOffset);
            if (!ignoreBlank || !org.apache.commons.lang.StringUtils.isBlank(dest))
            {
                delimList.add(dest);
            }
        }
       
        return delimList.toArray(new String[delimList.size()]);
    }