InputStream與String,Byte之間互轉

/** *

• @author Andy.Chen
• @mail Chenjunjun.ZJ@gmail.com

*/ public class InputStreamUtils {

final static int BUFFER_SIZE = 4096;

/**
 * 將InputStream轉換成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");
}

/**
 * 將InputStream轉換成某種字符編碼的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");
}

/**
 * 將String轉換成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;
}

/**
 * 將InputStream轉換成byte數組
 * @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();
}

/**
 * 將byte數組轉換成InputStream
 * @param in
 * @return
 * @throws Exception
 */
public static InputStream byteTOInputStream(byte[] in) throws Exception{
	
	ByteArrayInputStream is = new ByteArrayInputStream(in);
	return is;
}

/**
 * 將byte數組轉換成String
 * @param in
 * @return
 * @throws Exception
 */
public static String byteTOString(byte[] in) throws Exception{
	
	InputStream is = byteTOInputStream(in);
	return InputStreamTOString(is);
}

}