java - 如何从字节 [] 打印十六进制？

Question

我的目标是遵循 RFC6455 [第 8 页]

The server would then take the SHA-1 hash of this,
   giving the value 0xb3 0x7a 0x4f 0x2c 0xc0 0x62 0x4f 0x16 0x90 0xf6
   0x46 0x06 0xcf 0x38 0x59 0x45 0xb2 0xbe 0xc4 0xea.

我假设0xb3等于 179。

这是我用来打印字节 [] 的代码行。记录器是 sl4fj。

  private static final Logger LOGGER = LoggerFactory.getLogger(WebSocketWorkerThread.class);

    public void onOpen() {
        String GUID = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
        byte[] SHA_1_hash_value = MessageDigest.getInstance("SHA-1").digest(
                ("dGhlIHNhbXBsZSBub25jZQ==" + GUID).getBytes()
        );
        StringBuilder sb = new StringBuilder();
        for (byte b : SHA_1_hash_value) {
          sb.append(String.format("%02X ", b));
        }
    }

我的预期结果：

0xb3 0x7a 0x4f 0x2c 0xc0 0x62 0x4f 0x16 0x90 0xf6
   0x46 0x06 0xcf 0x38 0x59 0x45 0xb2 0xbe 0xc4 0xea

实际结果：

64 3A 23 A1 A9 CE 6D 23 B2 71 B8 D5 45 CE A8 5F 25 CD 45 1E

标签： javawebsocket

Answer 1

  private static final Logger LOGGER = LoggerFactory.getLogger(WebSocketWorkerThread.class);

public void onOpen() {
    String GUID = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
    byte[] SHA_1_hash_value = MessageDigest.getInstance("SHA-1").digest(
            ("dGhlIHNhbXBsZSBub25jZQ==" + GUID).getBytes()
    );
    StringBuilder sb = new StringBuilder();
    for (byte b : SHA_1_hash_value) {
      sb.append("0x" + String.format("%02X ", b).toLowerCase());
    }
}