【转】Java 数据流转换工具类

 

转自：OPEN开发经验库    http://www.open-open.com/lib/view/open1355237678320.html

 

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

/**
 * @ClassName: StreamUtil
 * @Description: 数据流转换工具类
 * @author 
 * @company 
 * @date 2012-12-13
 * @version V1.0
 */

public final class StreamUtil {

	private StreamUtil() {
	}

	/**
	 * @Title: readStreadToByte
	 * @Description: 从输入流中获取数据
	 * @param inStream
	 *            输入流
	 * @return byte[]
	 * @throws Exception
	 * @author 
	 * @date 2012-12-13
	 */
	public static byte[] readStreadToByte(InputStream inStream)
			throws Exception {

		ByteArrayOutputStream outStream = new ByteArrayOutputStream();
		byte[] buf = new byte[1024];
		int len = 0;
		while ((len = inStream.read(buf)) != -1) {

			outStream.write(buf, 0, len);
		}

		byte[] result = outStream.toByteArray();

		outStream.close();
		inStream.close();

		return result;
	}

	/**
	 * @Title: readStreamToString
	 * @Description: 从输入流中获取数据
	 * @param inStream
	 *            输入流
	 * @return String
	 * @throws Exception
	 * @author 
	 * @date 2012-12-13
	 */
	public static String readStreamToString(InputStream inStream)
			throws Exception {

		ByteArrayOutputStream outStream = new ByteArrayOutputStream();
		byte[] buf = new byte[1024];
		int len = 0;
		while ((len = inStream.read(buf)) != -1) {

			outStream.write(buf, 0, len);
		}

		String result = outStream.toString();

		outStream.close();
		inStream.close();

		return result;
	}

	/**
	 * @Title: readStreamToString
	 * @Description: 将输入流转化成某字符编码的String
	 * @param inStream
	 *            输入流
	 * @param encoding
	 *            编码
	 * @return String
	 * @throws Exception
	 * @author 
	 * @date 2012-12-13
	 */
	public static String readStreamToString(InputStream inStream,
			String encoding) throws Exception {

		ByteArrayOutputStream outStream = new ByteArrayOutputStream();
		byte[] buf = new byte[1024];
		int len = 0;
		while ((len = inStream.read(buf)) != -1) {

			outStream.write(buf, 0, len);
		}

		String result = new String(outStream.toByteArray(), encoding);

		outStream.close();
		inStream.close();

		return result;
	}
}