Java中的FilterOutputStream 简介_动力节点Java学院整理

package java.io;
public class FilterOutputStream extends OutputStream {
  protected OutputStream out;
  public FilterOutputStream(OutputStream out) {
    this.out = out;
  }
  public void write(int b) throws IOException {
    out.write(b);
  }
  public void write(byte b[]) throws IOException {
    write(b, 0, b.length);
  }
  public void write(byte b[], int off, int len) throws IOException {
    if ((off | len | (b.length - (len + off)) | (off + len)) < 0)
      throw new IndexOutOfBoundsException();
    for (int i = 0 ; i < len ; i++) {
      write(b[off + i]);
    }
  }
  public void flush() throws IOException {
    out.flush();
  }
  public void close() throws IOException {
    try {
     flush();
    } catch (IOException ignored) {
    }
    out.close();
  }
}