Using salt in Spring Security

Spring Security 3.1 provides a new cryptography module that is included in the spring-security-core module and is available separately in spring-security-crypto. The crypto module contains its own o.s.s.crypto.password.PasswordEncoder interface. In fact, using this interface is the preferred method for encoding passwords, because it will salt passwords using a random salt. At the time of this writing, there are the following three implementations of o.s.s.crypto.password.PasswordEncoder:

Class	Description
o.s.s.crypto.bcrypt.BCryptPasswordEncoder	This class uses the bcrypt hashing function. It supports salt and the ability to slow down to perform over time as technology improves. This helps protect against brute-force search attacks.
o.s.s.crypto.password.NoOpPasswordEncoder	This class does no encoding (it returns the password in its plaintext form).
o.s.s.crypto.password.StandardPasswordEncoder	This class uses SHA-256 with multiple iterations and a random salt value...