import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;

public class StreamUtils {
   public static final int BUFFER_SIZE = 4096;


   /**
    * 将InputStream装换成某种字符编码的String
    *
    * @param in
    * @param encoding
    * @return
    */
   public static String InputStreamTOString(InputStream in, String encoding) {
      String res = null;
      ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
      byte[] data = new byte[BUFFER_SIZE];
      int count = -1;
      try {
         while ((count = in.read(data, 0, BUFFER_SIZE)) != -1) {
            outputStream.write(data, 0, count);
         }
      } catch (Exception e) {
         e.printStackTrace();
      }
      try {
         res = new String(outputStream.toByteArray(), encoding);
      } catch (UnsupportedEncodingException e) {
         e.printStackTrace();
      }
      return res;
   }
}