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

 1 import java.io.ByteArrayInputStream;
 2 import java.io.ByteArrayOutputStream;
 3 import java.io.IOException;
 4 import java.io.InputStream;
 5
 6 public class ByteToInputStream {
 7
 8     public static final InputStream byte2Input(byte[] buf) {
 9         return new ByteArrayInputStream(buf);
10     }
11
12     public static final byte[] input2byte(InputStream inStream)
13             throws IOException {
14         ByteArrayOutputStream swapStream = new ByteArrayOutputStream();
15         byte[] buff = new byte[100];
16         int rc = 0;
17         while ((rc = inStream.read(buff, 0, 100)) > 0) {
18             swapStream.write(buff, 0, rc);
19         }
20         byte[] in2b = swapStream.toByteArray();
21         return in2b;
22     }
23
24 }