Java文件和ByTAREARE或输入流

的确,jfugue只允许加载一个文件,这是很遗憾的,因为没有任何东西可以阻止使用任何其他类型的流:

public static final String TITLE = "Title";

public static Pattern loadPattern(File file) throws IOException {
    InputStream in = new FileInputStream(file);
    try {
        return loadPattern(in);
    } finally {
        in.close();
    }
}

public static Pattern loadPattern(URL url) throws IOException {
    InputStream in = url.openStream();
    try {
        return loadPattern(in);
    } finally {
        in.close();
    }
}

public static Pattern loadPattern(InputStream in) throws IOException {
    return loadPattern(new InputStreamReader(in, "UTF-8")); // or ISO-8859-1 ?
}

public static Pattern loadPattern(Reader reader) throws IOException {
    if (reader instanceof BufferedReader) {
        return loadPattern(reader);
    } else {
        return loadPattern(new BufferedReader(reader));
    }
}

public static Pattern loadPattern(BufferedReader bread) throws IOException {
    StringBuffer buffy = new StringBuffer();

    Pattern pattern = new Pattern();
    while (bread.ready()) {
        String s = bread.readLine();
        if ((s != null) && (s.length() > 1)) {
            if (s.charAt(0) != '#') {
                buffy.append(" ");
                buffy.append(s);
            } else {
                String key = s.substring(1, s.indexOf(':')).trim();
                String value = s.substring(s.indexOf(':')+1, s.length()).trim();
                if (key.equalsIgnoreCase(TITLE)) {
                    pattern.setTitle(value);
                } else {
                    pattern.setProperty(key, value);
                }
            }
        }
    }
    return pattern;
}

更新(用于loadmidi)

public static Pattern loadMidi(InputStream in) throws IOException, InvalidMidiDataException
{
    MidiParser parser = new MidiParser();
    MusicStringRenderer renderer = new MusicStringRenderer();
    parser.addParserListener(renderer);
    parser.parse(MidiSystem.getSequence(in));
    Pattern pattern = new Pattern(renderer.getPattern().getMusicString());
    return pattern;
}

public static Pattern loadMidi(URL url) throws IOException, InvalidMidiDataException
{
    MidiParser parser = new MidiParser();
    MusicStringRenderer renderer = new MusicStringRenderer();
    parser.addParserListener(renderer);
    parser.parse(MidiSystem.getSequence(url));
    Pattern pattern = new Pattern(renderer.getPattern().getMusicString());
    return pattern;
}

如果我没有错,模式文件包含纯文本。使用getasstream()加载文件,然后使用

BufferedReader br = new BufferedReader(new InputStreamReader(yourStream));
//...
String pattern = convertToString(br); // you should implement convertToString yourself. It's easy. Read the java.io APIs.

其中yourstream是getasstream()返回的inputstream。然后使用add(字符串…模式)加载模式的方法:

add(pattern);

您可以使用此代码(取自 Pattern.loadPattern() 方法:

    InputStream is = ...; // Get a stream from the Asset object

    // Prepare a pattern object
    Pattern pattern = new Pattern();

    // Now start reaing from the stream
    StringBuffer buffy = new StringBuffer();
    BufferedReader bread = new BufferedReader(new InputStreamReader(is));
    while (bread.ready()) {
        String s = bread.readLine();
        if ((s != null) && (s.length() > 1)) {
            if (s.charAt(0) != '#') {
                buffy.append(" ");
                buffy.append(s);
            } else {
                String key = s.substring(1, s.indexOf(':')).trim();
                String value = s.substring(s.indexOf(':')+1, s.length()).trim();
                if (key.equalsIgnoreCase(TITLE)) {
                    pattern.setTitle(value);
                } else {
                    pattern.setProperty(key, value);
                }
            }
        }
    }
    bread.close();
    pattern.setMusicString(buffy.toString());

    // Your pattern is now ready

可以读取字节数组并将其转换为字符串。

问题将是inputstream。有一个stringbufferinputstream,但是为了支持stringreader,它被弃用了。

byte [] b = Assets.get();
InputStream is = new StringBufferInputStream(new String(b));
Pattern.load(is);

你不想用 File ,您要使用 java.io.ByteArrayInputStream