java中byte,String,InputStream之间的转换(转载)

import java.io.ByteArrayInputStream;  import java.io.ByteArrayOutputStream;  import java.io.IOException;  import java.io.InputStream;    /**  *   * @author Andy.Chen  * @mail Chenjunjun.ZJ@gmail.com  *  */  public class InputStreamUtils {            final static int BUFFER_SIZE = 4096;            /**      * 将InputStream转换成String      * @param in InputStream      * @return String      * @throws Exception      *       */      public static String InputStreamTOString(InputStream in) throws Exception{                    ByteArrayOutputStream outStream = new ByteArrayOutputStream();          byte[] data = new byte[BUFFER_SIZE];          int count = -1;          while((count = in.read(data,0,BUFFER_SIZE)) != -1)              outStream.write(data, 0, count);                    data = null;          return new String(outStream.toByteArray(),"ISO-8859-1");      }            /**      * 将InputStream转换成某种字符编码的String      * @param in      * @param encoding      * @return      * @throws Exception      */           public static String InputStreamTOString(InputStream in,String encoding) throws Exception{                    ByteArrayOutputStream outStream = new ByteArrayOutputStream();          byte[] data = new byte[BUFFER_SIZE];          int count = -1;          while((count = in.read(data,0,BUFFER_SIZE)) != -1)              outStream.write(data, 0, count);                    data = null;          return new String(outStream.toByteArray(),"ISO-8859-1");      }            /**      * 将String转换成InputStream      * @param in      * @return      * @throws Exception      */      public static InputStream StringTOInputStream(String in) throws Exception{                    ByteArrayInputStream is = new ByteArrayInputStream(in.getBytes("ISO-8859-1"));          return is;      }            /**      * 将InputStream转换成byte数组      * @param in InputStream      * @return byte[]      * @throws IOException      */      public static byte[] InputStreamTOByte(InputStream in) throws IOException{                    ByteArrayOutputStream outStream = new ByteArrayOutputStream();          byte[] data = new byte[BUFFER_SIZE];          int count = -1;          while((count = in.read(data,0,BUFFER_SIZE)) != -1)              outStream.write(data, 0, count);                    data = null;          return outStream.toByteArray();      }            /**      * 将byte数组转换成InputStream      * @param in      * @return      * @throws Exception      */      public static InputStream byteTOInputStream(byte[] in) throws Exception{                    ByteArrayInputStream is = new ByteArrayInputStream(in);          return is;      }            /**      * 将byte数组转换成String      * @param in      * @return      * @throws Exception      */      public static String byteTOString(byte[] in) throws Exception{                    InputStream is = byteTOInputStream(in);          return InputStreamTOString(is);      }    }