Posted on 2007-02-06 17:15
lixw 閱讀(157)
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?1
import
?java.security.
*
;?????
?2
???
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public
?
class
?MD5
{?????
?4
???
?5
?
public
?
final
?
static
?String?getMD5(String?s)
{?????
?6
??
char
?hexDigits[]?
=
?
{?????
?7
????
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0
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,?
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a
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b
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c
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}
;?????
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??
try
?
{?????
12
???
byte
[]?strTemp?
=
?s.getBytes();?????
13
???MessageDigest?mdTemp?
=
?MessageDigest.getInstance(
"
MD5
"
);?????
14
???mdTemp.update(strTemp);?????
15
???
byte
[]?md?
=
?mdTemp.digest();?????
16
???
int
?j?
=
?md.length;?????
17
???
char
?str[]?
=
?
new
?
char
[j?
*
?
2
];?????
18
???
int
?k?
=
?
0
;?????
19
???
for
?(
int
?i?
=
?
0
;?i?
<
?j;?i
++
)?
{?????
20
????
byte
?byte0?
=
?md[i];?????
21
????str[k
++
]?
=
?hexDigits[byte0?
>>>
?
4
?
&
?
0xf
];?????
22
????str[k
++
]?
=
?hexDigits[byte0?
&
?
0xf
];?????
23
???}
?????
24
???
return
?
new
?String(str);?????
25
??}
catch
?(Exception?e)
{?????
26
???
return
?
null
;?????
27
??}
?????
28
?}
?????
29
?????
30
?
public
?
static
?
void
?main(String[]?args)
{?????
31
???
32
??System.out.print(MD5.getMD5(
"
abcd
"
));?????
33
?}
????
34
}
????
35