inputstream转为byte数组 数组越界

Question

public static byte[] readInputStream(InputStream inStream) throws Exception {

    try {
        ByteArrayOutputStream outStream = new ByteArrayOutputStream();
        byte[] buffer = new byte[1024];
        int len = 0;
        while ((len = inStream.read(buffer)) != -1) {
            outStream.write(buffer, 0, len);
        }
        inStream.close();
        return outStream.toByteArray();
    }catch (Exception e){
        e.printStackTrace();
        throw new Exception(e);
    }

}

网上都是这种处理方式 写死有越界的可能性

不知道有没有其他的处理方式

Answer 1

最好的方法是用Apache commons IO的IOUtils.toByteArray(inputStream)，一行代码解决。

Answer 2

        int count = 0;
        while (count == 0) {
            count = inStream.available();
        }
        byte[] b = new byte[count];
        inStream.read(b);
        return b;