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")); } }
以上就是c# 加密类工具实例分析的详细内容。