Migrating from Spring security 2.0 to Spring security 3.0.7

问题

I am having a project which uses Spring framework(migrated from 2.0 to 3.0.7) and Spring security 2.0. And I want to use Spring security 3.0.7. I have used MessageDigestPasswordEncoder, SecurityContextHolder. But now I've added Spring security 3.0.7 jar files to my project but it is showing some compilation issues to above classes.

I need help for migration.

Thanks in advance.

来源：https://stackoverflow.com/questions/8543229/migrating-from-spring-security-2-0-to-spring-security-3-0-7