Spring Security3.1 最新配置实例 (转载)

一、数据库结构

     先来看一下数据库结构,采用的是基于角色-资源-用户的权限管理设计。(MySql数据库)

    为了节省篇章,只对比较重要的字段进行注释。

    1.用户表Users

    CREATE TABLE `users` (

       -- 账号是否有限 1. 是 0.否
       `enable` int(11) default NULL,
       `password` varchar(255) default NULL,
       `account` varchar(255) default NULL,
       `id` int(11) NOT NULL auto_increment,
       PRIMARY KEY  (`id`)
    )

   2.角色表Roles

   CREATE TABLE `roles` (
     `enable` int(11) default NULL,
     `name` varchar(255) default NULL,
     `id` int(11) NOT NULL auto_increment,
     PRIMARY KEY  (`id`)
   )

   3 用户_角色表users_roles

   CREATE TABLE `users_roles` (

     --用户表的外键
     `uid` int(11) default NULL,

     --角色表的外键
     `rid` int(11) default NULL,
     `urId` int(11) NOT NULL auto_increment,
     PRIMARY KEY  (`urId`),
     KEY `rid` (`rid`),
     KEY `uid` (`uid`),
    CONSTRAINT `users_roles_ibfk_1` FOREIGN KEY (`rid`) REFERENCES `roles` (`id`),
    CONSTRAINT `users_roles_ibfk_2` FOREIGN KEY (`uid`) REFERENCES `users` (`id`)
   )

   4.资源表resources

   CREATE TABLE `resources` (
     `memo` varchar(255) default NULL,

     -- 权限所对应的url地址
     `url` varchar(255) default NULL,

     --优先权
     `priority` int(11) default NULL,

     --类型
     `type` int(11) default NULL,

     --权限所对应的编码,例201代表发表文章
     `name` varchar(255) default NULL,
     `id` int(11) NOT NULL auto_increment,
     PRIMARY KEY  (`id`)
   )

   5.角色_资源表roles_resources

    CREATE TABLE `roles_resources` (
      `rsid` int(11) default NULL,
      `rid` int(11) default NULL,
      `rrId` int(11) NOT NULL auto_increment,
      PRIMARY KEY  (`rrId`),
      KEY `rid` (`rid`),
      KEY `roles_resources_ibfk_2` (`rsid`),
      CONSTRAINT `roles_resources_ibfk_2` FOREIGN KEY (`rsid`) REFERENCES `resources` (`id`),
      CONSTRAINT `roles_resources_ibfk_1` FOREIGN KEY (`rid`) REFERENCES `roles` (`id`)
      )

  二、系统配置

   所需要的jar包,请自行到官网下 载,我用的是Spring Security3.1.0.RC1版的。把dist下的除了源码件包导入就行了。还有那些零零碎的   数据库驱动啊,log4j.jar等等,我相信在用Spring Security之前,大家已经会的了。

  1) web.xml

  1. <!-- Spring -->   
  2.   < context-param >   
  3.     < param-name > contextConfigLocation </ param-name >   
  4.     < param-value > classpath:applicationContext.xml,classpath:applicationContext-security.xml </ param-value >   
  5.   </ context-param >   
  6.     
  7.       
  8.   < listener >   
  9.     < listener-class > org.springframework.web.context.ContextLoaderListener </ listener-class >   
  10.   </ listener >   
  11.   <!-- 权限 -->   
  12.   < filter >   
  13.         < filter-name > springSecurityFilterChain </ filter-name >   
  14.         < filter-class >   
  15.             org.springframework.web.filter.DelegatingFilterProxy  
  16.         </ filter-class >   
  17.    </ filter >   
  18.     < filter-mapping >   
  19.         < filter-name > springSecurityFilterChain </ filter-name >   
  20.         < url-pattern > /* </ url-pattern >   
  21.     </ filter-mapping >  

 这里主要是配置了让容器启动的时候加载application-security.xml和Spring Security的权限过滤器代理,让其过滤所有的客服请求。

 2)application-security.xml

 

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  1. <? xml   version = "1.0"   encoding = "UTF-8" ?>   
  2. < beans:beans   xmlns = "http://www.springframework.org/schema/security"   
  3.     xmlns:beans = "http://www.springframework.org/schema/beans"   
  4.     xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"   
  5.     xsi:schemaLocation ="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd  
  6.                         http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-3.1.xsd">   
  7.                           
  8.     < global-method-security   pre-post-annotations = "enabled"   />    
  9.     <!-- 该路径下的资源不用过滤 -->              
  10.     < http   pattern = "/js/**"   security = "none" />   
  11.     < http   use-expressions = "true"   auto-config = "true" >   
  12.           
  13.         < form-login   />   
  14.         < logout />   
  15.         <!-- 实现免登陆验证 -->   
  16.         < remember-me   />   
  17.         < session-management   invalid-session-url = "/timeout.jsp" >   
  18.             < concurrency-control   max-sessions = "10"   error-if-maximum-exceeded = "true"   />   
  19.         </ session-management >   
  20.         < custom-filter   ref = "myFilter"   before = "FILTER_SECURITY_INTERCEPTOR" />   
  21.     </ http >   
  22.     <!-- 配置过滤器 -->   
  23.     < beans:bean   id = "myFilter"   class = "com.huaxin.security.MySecurityFilter" >   
  24.         <!-- 用户拥有的权限 -->   
  25.         < beans:property   name = "authenticationManager"   ref = "myAuthenticationManager"   />   
  26.         <!-- 用户是否拥有所请求资源的权限 -->   
  27.         < beans:property   name = "accessDecisionManager"   ref = "myAccessDecisionManager"   />   
  28.         <!-- 资源与权限对应关系 -->   
  29.         < beans:property   name = "securityMetadataSource"   ref = "mySecurityMetadataSource"   />   
  30.     </ beans:bean >   
  31.     <!-- 实现了UserDetailsService的Bean -->   
  32.     < authentication-manager   alias = "myAuthenticationManager" >   
  33.         < authentication-provider   user-service-ref = "myUserDetailServiceImpl"   />   
  34.     </ authentication-manager >   
  35.     < beans:bean   id = "myAccessDecisionManager"   class = "com.huaxin.security.MyAccessDecisionManager" > </ beans:bean >   
  36.     < beans:bean   id = "mySecurityMetadataSource"   class = "com.huaxin.security.MySecurityMetadataSource" >   
  37.         < beans:constructor-arg   name = "resourcesDao"   ref = "resourcesDao" > </ beans:constructor-arg >   
  38.     </ beans:bean >   
  39.     < beans:bean   id = "myUserDetailServiceImpl"   class = "com.huaxin.security.MyUserDetailServiceImpl" >   
  40.         < beans:property   name = "usersDao"   ref = "usersDao" > </ beans:property >   
  41.     </ beans:bean >   
  42. </ beans:beans >   

我们在第二个http标签下配置一个我们自定义的继承了org.springframework.security.access.intercept.AbstractSecurityInterceptor的Filter,并注入其

必须的3个组件authenticationManager、accessDecisionManager和securityMetadataSource。其作用上面已经注释了。

<custom-filter ref="myFilter" before="FILTER_SECURITY_INTERCEPTOR"/> 这里的FILTER_SECURITY_INTERCEPTOR是Spring Security默认的Filter,

我们自定义的Filter必须在它之前,过滤客服请求。接下来看下我们最主要的myFilter吧。

3)myFilter

  (1) MySecurityFilter.java 过滤用户请求

 

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  1. public   class  MySecurityFilter  extends  AbstractSecurityInterceptor  implements  Filter {  
  2.     //与applicationContext-security.xml里的myFilter的属性securityMetadataSource对应,   
  3.     //其他的两个组件,已经在AbstractSecurityInterceptor定义   
  4.     private  FilterInvocationSecurityMetadataSource securityMetadataSource;  
  5.   
  6.     @Override   
  7.     public  SecurityMetadataSource obtainSecurityMetadataSource() {  
  8.         return   this .securityMetadataSource;  
  9.     }  
  10.   
  11.     public   void  doFilter(ServletRequest request, ServletResponse response,  
  12.             FilterChain chain) throws  IOException, ServletException {  
  13.         FilterInvocation fi = new  FilterInvocation(request, response, chain);  
  14.         invoke(fi);  
  15.     }  
  16.       
  17.     private   void  invoke(FilterInvocation fi)  throws  IOException, ServletException {  
  18.         // object为FilterInvocation对象   
  19.                   //super.beforeInvocation(fi);源码   
  20.         //1.获取请求资源的权限   
  21.         //执行Collection<ConfigAttribute> attributes = SecurityMetadataSource.getAttributes(object);   
  22.         //2.是否拥有权限   
  23.         //this.accessDecisionManager.decide(authenticated, object, attributes);   
  24.         InterceptorStatusToken token = super .beforeInvocation(fi);  
  25.         try  {  
  26.             fi.getChain().doFilter(fi.getRequest(), fi.getResponse());  
  27.         } finally  {  
  28.             super .afterInvocation(token,  null );  
  29.         }  
  30.     }  
  31.   
  32.     public  FilterInvocationSecurityMetadataSource getSecurityMetadataSource() {  
  33.         return  securityMetadataSource;  
  34.     }  
  35.   
  36.     public   void  setSecurityMetadataSource(FilterInvocationSecurityMetadataSource securityMetadataSource) {  
  37.         this .securityMetadataSource = securityMetadataSource;  
  38.     }  
  39.       
  40.     public   void  init(FilterConfig arg0)  throws  ServletException {  
  41.         // TODO Auto-generated method stub   
  42.     }  
  43.       
  44.     public   void  destroy() {  
  45.         // TODO Auto-generated method stub   
  46.           
  47.     }  
  48.   
  49.     @Override   
  50.     public  Class<?  extends  Object> getSecureObjectClass() {  
  51.         //下面的MyAccessDecisionManager的supports方面必须放回true,否则会提醒类型错误   
  52.         return  FilterInvocation. class ;  
  53.     }  
  54. }  

  核心的InterceptorStatusToken token = super.beforeInvocation(fi);会调用我们定义的accessDecisionManager:decide(Object object)和securityMetadataSource

  :getAttributes(Object object)方法。

 (2)MySecurityMetadataSource.java

 

[java] view plain copy
  1. //1 加载资源与权限的对应关系   
  2. public   class  MySecurityMetadataSource  implements  FilterInvocationSecurityMetadataSource {  
  3.     //由spring调用   
  4.     public  MySecurityMetadataSource(ResourcesDao resourcesDao) {  
  5.         this .resourcesDao = resourcesDao;  
  6.         loadResourceDefine();  
  7.     }  
  8.   
  9.     private  ResourcesDao resourcesDao;  
  10.     private   static  Map<String, Collection<ConfigAttribute>> resourceMap =  null ;  
  11.   
  12.     public  ResourcesDao getResourcesDao() {  
  13.         return  resourcesDao;  
  14.     }  
  15.   
  16.     public   void  setResourcesDao(ResourcesDao resourcesDao) {  
  17.         this .resourcesDao = resourcesDao;  
  18.     }  
  19.   
  20.     public  Collection<ConfigAttribute> getAllConfigAttributes() {  
  21.         // TODO Auto-generated method stub   
  22.         return   null ;  
  23.     }  
  24.   
  25.     public   boolean  supports(Class<?> clazz) {  
  26.         // TODO Auto-generated method stub   
  27.         return   true ;  
  28.     }  
  29.     //加载所有资源与权限的关系   
  30.     private   void  loadResourceDefine() {  
  31.         if (resourceMap ==  null ) {  
  32.             resourceMap = new  HashMap<String, Collection<ConfigAttribute>>();  
  33.             List<Resources> resources = this .resourcesDao.findAll();  
  34.             for  (Resources resource : resources) {  
  35.                 Collection<ConfigAttribute> configAttributes = new  ArrayList<ConfigAttribute>();  
  36.                                 //以权限名封装为Spring的security Object   
  37.                 ConfigAttribute configAttribute = new  SecurityConfig(resource.getName());  
  38.                 configAttributes.add(configAttribute);  
  39.                 resourceMap.put(resource.getUrl(), configAttributes);  
  40.             }  
  41.         }  
  42.           
  43.         Set<Entry<String, Collection<ConfigAttribute>>> resourceSet = resourceMap.entrySet();  
  44.         Iterator<Entry<String, Collection<ConfigAttribute>>> iterator = resourceSet.iterator();  
  45.           
  46.     }  
  47.     //返回所请求资源所需要的权限   
  48.     public  Collection<ConfigAttribute> getAttributes(Object object)  throws  IllegalArgumentException {  
  49.           
  50.         String requestUrl = ((FilterInvocation) object).getRequestUrl();  
  51.         System.out.println("requestUrl is "  + requestUrl);  
  52.         if (resourceMap ==  null ) {  
  53.             loadResourceDefine();  
  54.         }  
  55.         return  resourceMap.get(requestUrl);  
  56.     }  
  57.   
  58. }  

 这里的resourcesDao,熟悉Dao设计模式和Spring 注入的朋友应该看得明白。

(3)MyUserDetailServiceImpl.java

 

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  1. public   class  MyUserDetailServiceImpl  implements  UserDetailsService {  
  2.       
  3.     private  UsersDao usersDao;  
  4.     public  UsersDao getUsersDao() {  
  5.         return  usersDao;  
  6.     }  
  7.   
  8.     public   void  setUsersDao(UsersDao usersDao) {  
  9.         this .usersDao = usersDao;  
  10.     }  
  11.       
  12.     public  UserDetails loadUserByUsername(String username)  throws  UsernameNotFoundException {  
  13.         System.out.println("username is "  + username);  
  14.         Users users = this .usersDao.findByName(username);  
  15.         if (users ==  null ) {  
  16.             throw   new  UsernameNotFoundException(username);  
  17.         }  
  18.         Collection<GrantedAuthority> grantedAuths = obtionGrantedAuthorities(users);  
  19.           
  20.         boolean  enables =  true ;  
  21.         boolean  accountNonExpired =  true ;  
  22.         boolean  credentialsNonExpired =  true ;  
  23.         boolean  accountNonLocked =  true ;  
  24.           
  25.         User userdetail = new  User(users.getAccount(), users.getPassword(), enables, accountNonExpired, credentialsNonExpired, accountNonLocked, grantedAuths);  
  26.         return  userdetail;  
  27.     }  
  28.       
  29.     //取得用户的权限   
  30.     private  Set<GrantedAuthority> obtionGrantedAuthorities(Users user) {  
  31.         Set<GrantedAuthority> authSet = new  HashSet<GrantedAuthority>();  
  32.         Set<Roles> roles = user.getRoles();  
  33.           
  34.         for (Roles role : roles) {  
  35.             Set<Resources> tempRes = role.getResources();  
  36.             for (Resources res : tempRes) {  
  37.                 authSet.add(new  GrantedAuthorityImpl(res.getName()));  
  38. s           }  
  39.         }  
  40.         return  authSet;  
  41.     }  
  42. }  

(4) MyAccessDecisionManager.java

[java] view plain copy
  1. public   class  MyAccessDecisionManager  implements  AccessDecisionManager {  
  2.       
  3.     public   void  decide(Authentication authentication, Object object, Collection<ConfigAttribute> configAttributes)  throws  AccessDeniedException, InsufficientAuthenticationException {  
  4.         if (configAttributes ==  null ) {  
  5.             return ;  
  6.         }  
  7.         //所请求的资源拥有的权限(一个资源对多个权限)   
  8.         Iterator<ConfigAttribute> iterator = configAttributes.iterator();  
  9.         while (iterator.hasNext()) {  
  10.             ConfigAttribute configAttribute = iterator.next();  
  11.             //访问所请求资源所需要的权限   
  12.             String needPermission = configAttribute.getAttribute();  
  13.             System.out.println("needPermission is "  + needPermission);  
  14.             //用户所拥有的权限authentication   
  15.             for (GrantedAuthority ga : authentication.getAuthorities()) {  
  16.                 if (needPermission.equals(ga.getAuthority())) {  
  17.                     return ;  
  18.                 }  
  19.             }  
  20.         }  
  21.         //没有权限   
  22.         throw   new  AccessDeniedException( " 没有权限访问! " );  
  23.     }  
  24.   
  25.     public   boolean  supports(ConfigAttribute attribute) {  
  26.         // TODO Auto-generated method stub   
  27.         return   true ;  
  28.     }  
  29.   
  30.     public   boolean  supports(Class<?> clazz) {  
  31.         // TODO Auto-generated method stub   
  32.         return   true ;  
  33.     }  
  34.       
  35. }  

三、流程

 1)容器启动(MySecurityMetadataSource:loadResourceDefine加载系统资源与权限列表)
 2)用户发出请求
 3)过滤器拦截(MySecurityFilter:doFilter)
 4)取得请求资源所需权限(MySecurityMetadataSource:getAttributes)
 5)匹配用户拥有权限和请求权限(MyAccessDecisionManager:decide),如果用户没有相应的权限,

     执行第6步,否则执行第7步。
 6)登录
 7)验证并授权(MyUserDetailServiceImpl:loadUserByUsername)
 8)重复4,5

四、结束语

好了,终于写完了,回头看了一下,感觉不是怎么行。等我弄明白Spring Security它的原理之后,再回头修改下注释吧。大家觉得不妥的地方,可以留言,我会回复大家的。

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转载自grey2.iteye.com/blog/1714086