spring security 配置详解
http://static.springsource.org/spring-security/site/docs/3.0.x/reference/appendix-namespace.html#nsa-form-login
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If session fixation protection is enabled, the? This element configures an LDAP? ?The?<ldap-user-service>?ElementUserDetailsService. The class used is?LdapUserDetailsService?which is a combination of a?FilterBasedLdapUserSearch?and aDefaultAuthoritiesPopulator. The attributes it supports have the same usage as in?<ldap-provider>.