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public static String md5Hex(byte[] bArr) {
    try {
        return new String(encodeHex(MessageDigest.getInstance("MD5").digest(bArr), DIGITS_UPPER));
    } catch (Throwable unused) {
        return null;
    }
}

这里的报错“Throwable unused” 这个错误是非法使用的错误?


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上网搜一下 Java 的异常处理机制,以及 try...catch 相关的内容。算是基础语法,但三两句实在说不清楚。


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