java编程md5

}

public void testDigest()

{

try

{

String myinfo="my test information!";

java.security.MessageDigest alga=java.Instance("SHA-1");

alga.Bytes());

byte[] digesta=alga.digest();

System.out.println("本信息SHA-1摘要是："+byte2hex(digesta));

java.security.MessageDigest algb=java.Instance("MD5");

algb.Bytes());

byte[] digestb=algb.digest();

System.out.println("本信息MD5摘要是：  "+byte2hex(digestb));

if(algb.isEqual(digesta, algb.digest()))

{

System.out.println("equal!");

}

else

{

System.out.println("failure");

}

}

catch(java.security.NoSuchAlgorithmException ex)

{

System.out.String());

}

}

public String byte2hex(byte[] b)

{

String hs="";

String stmp="";

for(int n=0;n

{

stmp=(java.HexString(b[n] & 0XFF));

if(stmp.length()==1)

hs=hs+'0'+stmp;

else

hs=hs+stmp;

if(n

hs=hs+':';

}

UpperCase();

}

}

程序运行结果如下：

本信息SHA-1摘要是：DC:22:48:48:0E:6F:6B:90:A8:F0:D1:0E:66:D6:D4:63:EB:E2:FC:5A

本信息MD5摘要是：  C9:AA:1A:FB:B9:DA:A6:CC:AD:7D:38:0A:48:F1:2E:B6

failure