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;
    }

}