InputStream与String,Byte之间互转

              本文将介绍InputStream与String,Byte之间的相互转换。以代码来说明：

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * 
 * @author Andy.Chen
 * @mail [e-mail]
 *
 */
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);
    }

}