net.unmz.java.util.security.SHA1Utils Maven / Gradle / Ivy
package net.unmz.java.util.security;
import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
/**
* Project Name:
* 功能描述：
*
* @author [email protected]
* @version 1.0
* @date 2020/3/18 11:41
* @since JDK 1.8
*/
public class SHA1Utils {
//Sha1签名
public static String getSha1(String str) {
if (str == null || str.length() == 0) {
return null;
}
char hexDigits[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'a', 'b', 'c', 'd', 'e', 'f'};
try {
MessageDigest mdTemp = MessageDigest.getInstance("SHA1");
mdTemp.update(str.getBytes(StandardCharsets.UTF_8));
byte[] md = mdTemp.digest();
int j = md.length;
char buf[] = new char[j * 2];
int k = 0;
for (int i = 0; i < j; i++) {
byte byte0 = md[i];
buf[k++] = hexDigits[byte0 >>> 4 & 0xf];
buf[k++] = hexDigits[byte0 & 0xf];
}
return new String(buf);
} catch (Exception e) {
return null;
}
}
}