Java 数据流转换工具类

    import java.io.ByteArrayOutputStream;        import java.io.InputStream;                /**        * 数据流转换工具类        *        */        public class StreamUtil {                    /**            * 从输入流中获取数据            * @param inStream 输入流            * @return            * @throws Exception            */            public static byte[] readStreamToByte(InputStream inStream) throws Exception{                ByteArrayOutputStream outStream = new ByteArrayOutputStream();                byte[] buffer = new byte[1024];                int len = 0;                while( (len=inStream.read(buffer)) != -1 ){                    outStream.write(buffer, 0, len);                }                inStream.close();                return outStream.toByteArray();            }                        /**            * 从输入流中获取数据            * @param inStream 输入流            * @return            * @throws Exception            */            public static String readStreamToString(InputStream inStream) throws Exception{                ByteArrayOutputStream outStream = new ByteArrayOutputStream();                byte[] buffer = new byte[1024];                int len = 0;                while( (len=inStream.read(buffer)) != -1 ){                    outStream.write(buffer, 0, len);                }                inStream.close();                return outStream.toString();            }                        /**            * 将输入流转化成某字符编码的String            * @param inStream 输入流            * @param encoding 编码            * @return            * @throws Exception            */            public static String readStreamToString(InputStream inStream, String encoding) throws Exception{                ByteArrayOutputStream outStream = new ByteArrayOutputStream();                byte[] buffer = new byte[1024];                int len = 0;                while( (len=inStream.read(buffer)) != -1 ){                    outStream.write(buffer, 0, len);                }                inStream.close();                return new String(outStream.toByteArray(), encoding);            }                                }