将MD5数组转换为字符串java

MessageDigest md = MessageDigest.getInstance("MD5");
byte[] arr = md.digest(bytesOfMessage);
return Base64.getEncoder().encodeToString(arr);

注意:md5不再被认为是好的散列算法,请考虑选择SHAs

commons-codec

• 比较基准64- Base64.encodeBase64(digestBytes)
• Hex.encodeHex(digestBytes)

// Convert to hex string
StringBuffer sb = new StringBuffer();
for (int i = 0; i < messageDigest.length; i++) {
    if ((0xff & messageDigest[i]) < 0x10) {
        sb.append('0');
    }
    sb.append(Integer.toHexString(0xff & messageDigest[i]));
}
String md5 = sb.toString();

这假设您确实希望将MD5打印为十六进制字符串,而不是BASE64编码。这就是它通常的表现方式。

我看到了下一个解决方案:

    byte[] digest = md.digest(someDataByteArray);
    StringBuilder hex = new StringBuilder();
    for (byte b : digest) {
        hex.append(String.format("%02x", b));
    }

import javax.xml.bind.DatatypeConverter;
import java.security.MessageDigest;

...
String input = "westerngun";
MessageDigest digest = MessageDigest.getInstance("MD5"); // not thread-safe, create instance for each thread
byte[] result = digest.digest(input.getBytes()); // get MD5 hash array, could contain negative
String hex = DatatypeConverter.printHexBinary(result).toLowerCase(); // convert byte array to hex string

如果您想要一个号码:

Integer number = Integer.parseInt(hex, 16); // parse hex number to integer. If overflowed, use Long.parseLong()