YamlConfiguration.java 文件源码

@Override
protected String buildHeader() {
    String header = options().header();

    if (options().copyHeader()) {
        Configuration def = getDefaults();

        if ((def != null) && (def instanceof FileConfiguration)) {
            FileConfiguration filedefaults = (FileConfiguration) def;
            String defaultsHeader = filedefaults.buildHeader();

            if ((defaultsHeader != null) && (defaultsHeader.length() > 0)) {
                return defaultsHeader;
            }
        }
    }

    if (header == null) {
        return "";
    }

    StringBuilder builder = new StringBuilder();
    String[] lines = header.split("\r?\n", -1);
    boolean startedHeader = false;

    for (int i = lines.length - 1; i >= 0; i--) {
        builder.insert(0, "\n");

        if ((startedHeader) || (lines[i].length() != 0)) {
            builder.insert(0, lines[i]);
            builder.insert(0, COMMENT_PREFIX);
            startedHeader = true;
        }
    }

    return builder.toString();
}