spring security 3中推荐使用BCrypt算法加密密码

spring security 3中推荐使用BCrypt算法加密密码了,以前使用的是md5,
Md5PasswordEncoder 和 ShaPasswordEncoder,现在不推荐了,推荐用bcrpt
Bcrpt中的salt可以是随机的,比如:


int i = 0;
	while (i < 10) {
		String password = "123456";
		BCryptPasswordEncoder passwordEncoder = new BCryptPasswordEncoder();
		String hashedPassword = passwordEncoder.encode(password);
 
		System.out.println(hashedPassword);
		i++;
	}
 



输出为: 
$2a$10$EblZqNptyYvcLm/VwDCVAuBjzZOI7khzdyGPBr08PpIi0na624b8.
$2a$10$trT3.R/Nfey62eczbKEnueTcIbJXW.u1ffAo/XfyLpofwNDbEB86O
$2a$10$teJrCEnsxNT49ZpXU7n22O27aCGbVYYe/RG6/XxdWPJbOLZubLIi2
$2a$10$BHG59UT6p7bgT6U2fQ/9wOyTIdejh4Rk1vWilvl4b6ysNPdhnViUS
$2a$10$W9oRWeFmOT0bByL5fmAceucetmEYFg2yzq3e50mcu.CO7rUDb/poG
$2a$10$HApapHvDStTEwjjneMCvxuqUKVyycXZRfXMwjU0rRmaWMsjWQp/Zu
$2a$10$GYCkBzp2NlpGS/qjp5f6NOWHeF56ENAlHNuSssSJpE1MMYJevHBWO
$2a$10$gwbTCaIR/qE1uYhvEY6GG.bNDQcZuYQX9tkVwaK/aD7ZLPptC.7QC
$2a$10$5uKS72xK2ArGDgb2CwjYnOzQcOmB7CPxK6fz2MGcDBM9vJ4rUql36
$2a$10$6TajU85/gVrGUm5fv5Z8beVF37rlENohyLk3BEpZJFi6Av9JNkw9O
   大大增加了安全性
使用方法很简单:

<authentication-manager>
<authentication-provider>
    <password-encoder ref="encoder" />
</authentication-provider>
  </authentication-manager>

  <beans:bean id="encoder"
class="org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder">
<beans:constructor-arg name="strength" value="11" />
  </beans:bean>

  其中strenth为长度

 

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