有谁知道我该如何使用“输入”来创建MD5哈希,我不知道该怎么称呼它?任何帮助都将得到最大的满足!谢谢 :)
InputStream input = new FileInputStream(fileName);
StringBuffer hexString = new StringBuffer();
MessageDigest md = MessageDigest.getInstance("MD5");
byte[] hash = md.digest();
for (int i = 0; i < hash.length; i++) {
if ((0xff & hash[i]) < 0x10) {
hexString.append("0"
+ Integer.toHexString((0xFF & hash[i])));
} else {
hexString.append(Integer.toHexString(0xFF & hash[i]));
}
}
String string = hexString.toString();
System.out.println(string);
最佳答案
这将从磁盘读取filename
并将MD5哈希结果放入hex
:
InputStream in = new FileInputStream(filename);
MessageDigest md = MessageDigest.getInstance("MD5");
byte[] buf = new byte[8192];
int len;
while ((len = in.read(buf)) != -1) {
md.update(buf, 0, len);
}
in.close();
byte[] bytes = md.digest();
StringBuilder sb = new StringBuilder(2 * bytes.length);
for (byte b : bytes) {
sb.append("0123456789ABCDEF".charAt((b & 0xF0) >> 4));
sb.append("0123456789ABCDEF".charAt((b & 0x0F)));
}
String hex = sb.toString();