InputStream與String,Byte之間互轉

本文將介紹InputStream與String,Byte之間的相互轉換。以代碼來說明：
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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;

/**
* 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轉換成某種字元編碼的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數群組轉換成InputStream
* @param in
* @return
* @throws Exception
*/
public static InputStream byteTOInputStream(byte[] in) throws Exception{

ByteArrayInputStream is = new ByteArrayInputStream(in);
return is;
}

/**
* 將byte數群組轉換成String
* @param in
* @return
* @throws Exception
*/
public static String byteTOString(byte[] in) throws Exception{

InputStream is = byteTOInputStream(in);
return InputStreamTOString(is);
}

}

http://blog.csdn.net/cjjky/article/details/6892443