微信開發中用到的Sha1加密演算法
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("UTF-8"));
byte[] md=mdTemp.digest();
int j=md.length;
Advertisements
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;
}
}