MD5加密
第一种
public static string GetMD5(string str)
{
//创建MD5对象
MD5 md5 = MD5.Create();
//开始使用MD5对象进行加密
byte[] buffer = Encoding.Default.GetBytes(str);
byte[] md5Buffer = md5.ComputeHash(buffer);
string strNew = null;
//将加密好的字节数组中每个元素都ToString()
for (int i = 0; i < md5Buffer.Length; i++)
{
strNew += md5Buffer[i].ToString(“x2”);//将十进制—>十六进制
}
return strNew;
}
第二种
package com.epc.epcfoundation.base.usermanager;
import java.security.MessageDigest;
public class Md5 {
public 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(MD5(“a”).toUpperCase());
}
}