在commons-io包中org.apache.commons.io.IOUtils類的toByteArray(InputStream input)已經有實現了,我們可以參考下思路,完成我們的方法,我們可以用類似下面的代碼實現inputStream轉化為byte[]數組public static byte[] toByteArray(InputStream input) throws IOException {
ByteArrayOutputStream output = new ByteArrayOutputStream();
byte[] buffer = new byte[4096];
int n = 0;
while (-1 != (n = input.read(buffer))) {
output.write(buffer, 0, n);
}
return output.toByteArray();
}
下面是IOUtils中摘錄出與toByteArray相關的方法
org.apache.commons.io.IOUtils.toByteArray
方法如下:
public static byte[] toByteArray(InputStream input)
throws IOException
{
ByteArrayOutputStream output = new ByteArrayOutputStream();
copy(input, output);
return output.toByteArray();
}
public static int copy(InputStream input, OutputStream output)
throws IOException
{
long count = copyLarge(input, output);
if (count > 2147483647L) {
return -1;
}
return (int)count;
}
public static long copyLarge(InputStream input, OutputStream output)
throws IOException
{
byte[] buffer = new byte[4096];
long count = 0L;
int n = 0;
while (-1 != (n = input.read(buffer))) {
output.write(buffer, 0, n);
count += n;
}
return count;
}
文章詳細出處：http://blog.csdn.net/zdwzzu2006/article/details/7745827