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1. ¼¯³É spring-security ¿ò¼Ü
      
1). ¼ÓÈë spring-security µÄÁ½¸ö jar °ü
      
2). ÔÚ web.xml ÎļþÖмÓÈë¼ÓÈë spring-security ¿ò¼ÜµÄ¹ýÂËÆ÷
      
3). н¨ applicationContext-security.xml ÅäÖÃÎļþ,²¢ÇÒ°Ñ security ×÷ΪĬÈϵÄÃüÃû¿Õ¼ä,
²¢½«Æäµ¼Èëµ½ applicationContext.xml ÖÐ
      
4). Éè¼ÆÁìÓòÄ£ÐÍ:
             
Authority -- ȨÏÞ
             
Resource -- ×ÊÔ´
             
Role -- ½ÇÉ«
             
Employee -- Ìí¼Ó Set<Role> roleSet
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Resource ºÍ Authority Ϊ¶à¶Ô¶àµÄ¶ÔÓ¦¹Øϵ
             
Authority ºÍ Role Ϊ¶à¶Ô¶àµÄ¶ÔÓ¦¹Øϵ
             
Role ºÍ Employee Ϊ¶à¶Ô¶àµÄ¶ÔÓ¦¹Øϵ
             
ËùÒÔ»¹ÐèÒª 3 ¸ö¶îÍâµÄ¹ØÁª±í
             
** Êý¾Ý±íÉè¼Æ²Î¼û spring-security-2
      
5).
             
¢Ù. Ð޸ĵ±Ç°ÏµÍ³µÄ login.jsp Ò³Ãæ, ¸ÄΪ spring-security µÄµÇ¼ҳÃæ, ²¢ÇÒÔÚ
<http> ½ÚµãÖнøÐÐÅäÖÃ.
             
    ** ×¢Òâ:
spring-security ÔڵǼ³É¹¦ºó, ÀûÓà "Öض¨Ïò" תµ½ form-login ½Úµã¶ÔÓ¦µÄ
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