将输出流(OutputStream)转化为输入流(InputStream)的方法(一)

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package test.io;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
/**
 * 用于把OutputStream 转化为 InputStream。
 * 适合于数据量不大，且内存足够全部容纳这些数据的情况。
 * @author 赵学庆 www.java2000.net
 *
 */
public class Test1 {
  /**
   * @param args
   * @throws IOException
   */
  public static void main(String[] args) throws IOException {
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    OutputStreamClass1.putDataOnOutputStream(out);
    InputStreamClass1.processDataFromInputStream(new ByteArrayInputStream(out.toByteArray()));
  }
}
class OutputStreamClass1 {
  public static void putDataOnOutputStream(ByteArrayOutputStream out) throws IOException {
    byte[] bs = new byte[] { 1, 2, 3, 4, 5 };
    out.write(bs);
  }
}
class InputStreamClass1 {
  public static void processDataFromInputStream(ByteArrayInputStream in) throws IOException {
    byte[] bs = new byte[1024];
    int len = in.read(bs);
    for (int i = 0; i < len; i++) {
      System.out.println(bs[i]);
    }
  }
}