byte[]和InputStream的相互转换

1：byte[]转换为InputStream
InputStream sbs = new ByteArrayInputStream(byte[] buf);

2：InputStream转换为InputStreambyte[]

ByteArrayOutputStream swapStream = new ByteArrayOutputStream(); 

byte[] buff = new byte[100]; //buff用于存放循环读取的临时数据 

int rc = 0; 

while ((rc = inStream.read(buff, 0, 100)) > 0) { 

swapStream.write(buff, 0, rc); 

}

byte[] in_b = swapStream.toByteArray(); //in_b为转换之后的结果

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

public class ByteToInputStream {

	public static final InputStream byte2Input(byte[] buf) {
		return new ByteArrayInputStream(buf);
	}

	public static final byte[] input2byte(InputStream inStream)
			throws IOException {
		ByteArrayOutputStream swapStream = new ByteArrayOutputStream();
		byte[] buff = new byte[100];
		int rc = 0;
		while ((rc = inStream.read(buff, 0, 100)) > 0) {
			swapStream.write(buff, 0, rc);
		}
		byte[] in2b = swapStream.toByteArray();
		return in2b;
	}

}