byte[]和InputStream的相互转换-蒲公英云

byte[]和InputStream的相互转换

：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;  
    }  
}