您总是可以自己写，
OutputStream以限制写的 字节 数。
下面假定如果超出大小，则要引发异常。
public final class LimitedOutputStream extends FilterOutputStream { private final long maxBytes; private long bytesWritten; public LimitedOutputStream(OutputStream out, long maxBytes) { super(out); this.maxBytes = maxBytes; } @Override public void write(int b) throws IOException { ensureCapacity(1); super.write(b); } @Override public void write(byte[] b) throws IOException { ensureCapacity(b.length); super.write(b); } @Override public void write(byte[] b, int off, int len) throws IOException { ensureCapacity(len); super.write(b, off, len); } private void ensureCapacity(int len) throws IOException { long newBytesWritten = this.bytesWritten + len; if (newBytesWritten > this.maxBytes) throw new IOException("File size exceeded: " + newBytesWritten + " > " + this.maxBytes); this.bytesWritten = newBytesWritten; }}当然，您现在必须手动设置
Writer/
OutputStream链。
final long SIZE_1GB = 1073741824L;try (BufferedWriter writer = new BufferedWriter(new OutputStreamWriter( new LimitedOutputStream(Files.newOutputStream(path), SIZE_1GB), StandardCharsets.UTF_8))) { //}
