C# 加密类工具实例分析
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2022-04-30 19:41:36
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5.SHA1加密
//sha1加密
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;
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;
}
}
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6.MD5加密工具类：
package com.huihui.util;
import java.security.MessageDigest;
/**
* MD5加密工具类
* @author Administrator
*
*/public class Md5Util {
public final static String MD5(String s){
char hexDigits[] = {'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'};
try { byte[] strTemp = s.getBytes();
MessageDigest mdTemp = MessageDigest.getInstance("MD5");
mdTemp.update(strTemp);
byte[] md = mdTemp.digest();
int j = md.length;
char str[] = new char[j*2];
int k = 0;
for (int i = 0; i < j; i++) {
byte byte0 = md[i];
str[k++] = hexDigits[byte0>>>4&0xf];
str[k++] = hexDigits[byte0 & 0xf];
} return new String(str);
} catch (Exception e) {
return null;
}
} public static void main(String[] args) {
System.out.println(Md5Util.MD5("b"));
}
}
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