Java中IOUtils

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public class IOUtils
{
public static byte[] getByte(InputStream is) throws Exception
{
  ByteArrayOutputStream bos = new ByteArrayOutputStream();
  byte[] buffer = new byte[1024];
  int len = 0;
  while ((len = is.read(buffer)) != -1)
  {
   bos.write(buffer);
  }
  return bos.toByteArray();
}

public static String getString(InputStream is) throws Exception
{
  ByteArrayOutputStream bos = new ByteArrayOutputStream();
  byte[] buffer = new byte[1024];
  int len = 0;
  while ((len = is.read(buffer)) != -1)
  {
   bos.write(buffer);
  }
  return bos.toString().trim();
}

public static String read(String filename) throws Exception
{
  FileInputStream fis = new FileInputStream(filename);
  ByteArrayOutputStream outStream = new ByteArrayOutputStream();
  byte[] buffer = new byte[1024];
  int len = 0;
  // 将内容读到buffer中，读到末尾为-1
  while ((len = fis.read(buffer)) != -1)
  {
   // 将每次读到字节数组(buffer变量)内容写到内存缓冲区中，起到保存每次内容的作用
   outStream.write(buffer, 0, len);
  }
  byte[] data = outStream.toByteArray(); // 取内存中保存的数据
  fis.close();
  String result = new String(data, "UTF-8");
  return result;
}
}