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package security;
import java.security.MessageDigest;
/**
* ÏûÏ¢ÕªÒªÊÇÒ»ÖÖÓëÏûÏ¢ÈÏÖ¤Âë½áºÏʹÓÃÒÔÈ·±£ÏûÏ¢ÍêÕûÐԵļ¼Êõ
* Ŀǰ¹ã·ºÊ¹ÓõÄËã·¨ÓÐMD4¡¢MD5¡¢SHA-1
* ÔÚjavaÖнøÐÐÏûÏ¢ÕªÒªºÜ¼òµ¥£¬ java.security.MessageDigestÌṩÁËÒ»¸ö¼òÒ׵IJÙ×÷·½·¨£¬ÈçÏÂ
* ×¢Ò⣺ÏûÏ¢ÕªÒªÊǵ¥ÏòµÄ
*/
public class MessageDigestExample {
public static void main(String[] args) throws Exception {
String beforeDegist = "asdf";
System.out.println("ժҪǰ:"+beforeDegist);
//³õʼÐÅϢҪת»»³É×Ö½ÚÁ÷µÄÐÎʽ
byte[] plainText = beforeDegist.getBytes("UTF8");
//ʹÓÃgetInstance("Ëã·¨")À´»ñµÃÏûÏ¢ÕªÒª,ÕâÀïʹÓÃSHA-1µÄ160λËã·¨
// MessageDigest messageDigest = MessageDigest.getInstance("SHA-1");
MessageDigest messageDigest = MessageDigest.getInstance("MD5");
// System.out.println("\n" + messageDigest.getProvider().getInfo());
//¿ªÊ¼Ê¹ÓÃËã·¨
messageDigest.update(plainText);
//Êä³öËã·¨ÔËËã½á¹û
String afterDegist = new String(messageDigest.digest(),"UTF8");
System.out.println("ͻ񻼗:"+afterDegist);
}
}
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