protected InterceptorStatusToken beforeInvocation(Object object) { 
 // 獲取訪問URL所需權限
 Collection<ConfigAttribute> attributes = this.obtainSecurityMetadataSource()
 .getAttributes(object);

 
 Authentication authenticated = authenticateIfRequired();

 // 通過accessDecisionManager鑒權
 try {
 this.accessDecisionManager.decide(authenticated, object, attributes);
 }
 catch (AccessDeniedException accessDeniedException) {
 publishEvent(new AuthorizationFailureEvent(object, attributes, authenticated,
  accessDeniedException));

 throw accessDeniedException;
 }

 if (debug) {
 logger.debug("Authorization successful");
 }

 if (publishAuthorizationSuccess) {
 publishEvent(new AuthorizedEvent(object, attributes, authenticated));
 }

 // Attempt to run as a different user
 Authentication runAs = this.runAsManager.buildRunAs(authenticated, object,
 attributes);

 if (runAs == null) {
 if (debug) {
 logger.debug("RunAsManager did not change Authentication object");
 }

 // no further work post-invocation
 return new InterceptorStatusToken(SecurityContextHolder.getContext(), false,
  attributes, object);
 }
 else {
 if (debug) {
 logger.debug("Switching to RunAs Authentication: " + runAs);
 }

 SecurityContext origCtx = SecurityContextHolder.getContext();
 SecurityContextHolder.setContext(SecurityContextHolder.createEmptyContext());
 SecurityContextHolder.getContext().setAuthentication(runAs);

 // need to revert to token.Authenticated post-invocation
 return new InterceptorStatusToken(origCtx, true, attributes, object);
 }
 }

public class RoleBasedVoter implements AccessDecisionVoter<Object> {
 @Override
 public boolean supports(ConfigAttribute attribute) {
 return true;
 }

 @Override
 public int vote(Authentication authentication, Object object, Collection<ConfigAttribute> attributes) {
 if(authentication == null) {
 return ACCESS_DENIED;
 }
 int result = ACCESS_ABSTAIN;
 Collection<? extends GrantedAuthority> authorities = extractAuthorities(authentication);
 for (ConfigAttribute attribute : attributes) {
 if(attribute.getAttribute()==null){
 continue;
 }
 if (this.supports(attribute)) {
 result = ACCESS_DENIED;

 // Attempt to find a matching granted authority
 for (GrantedAuthority authority : authorities) {
  if (attribute.getAttribute().equals(authority.getAuthority())) {
  return ACCESS_GRANTED;
  }
 }
 }
 }
 return result;
 }

 Collection<? extends GrantedAuthority> extractAuthorities(
 Authentication authentication) {
 return authentication.getAuthorities();
 }

 @Override
 public boolean supports(Class clazz) {
 return true;
 }
}

 FilterInvocation fi = (FilterInvocation) object;
 String url = fi.getRequestUrl();

@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true, securedEnabled = true)
public class SecurityConfiguration extends WebSecurityConfigurerAdapter {
 @Override
 protected void configure(HttpSecurity http) throws Exception {
 http
 .addFilterBefore(corsFilter, UsernamePasswordAuthenticationFilter.class)
 .exceptionHandling()
 .authenticationEntryPoint(problemSupport)
 .accessDeniedHandler(problemSupport)
 .and()
 .csrf()
 .disable()
 .headers()
 .frameOptions()
 .disable()
 .and()
 .sessionManagement()
 .sessionCreationPolicy(SessionCreationPolicy.STATELESS)
 .and()
 .authorizeRequests()
 // 自定義accessDecisionManager
 .accessDecisionManager(accessDecisionManager()) 
 .and()
 .apply(securityConfigurerAdapter());

 }

 @Bean
 public AccessDecisionManager accessDecisionManager() {
 List<AccessDecisionVoter<? extends Object>> decisionVoters
 = Arrays.asList(
 new WebExpressionVoter(),
 // new RoleVoter(),
 new RoleBasedVoter(),
 new AuthenticatedVoter());
 return new UnanimousBased(decisionVoters);
 }

public class AppFilterInvocationSecurityMetadataSource implements org.springframework.security.web.access.intercept.FilterInvocationSecurityMetadataSource {
 private FilterInvocationSecurityMetadataSource superMetadataSource;
 @Override
 public Collection<ConfigAttribute> getAllConfigAttributes() {
 return null;
 }

 public AppFilterInvocationSecurityMetadataSource(FilterInvocationSecurityMetadataSource expressionBasedFilterInvocationSecurityMetadataSource){
  this.superMetadataSource = expressionBasedFilterInvocationSecurityMetadataSource;
  // TODO 從數(shù)據(jù)庫加載權限配置
 }

 private final AntPathMatcher antPathMatcher = new AntPathMatcher();
 
 // 這里的需要從DB加載
 private final Map<String,String> urlRoleMap = new HashMap<String,String>(){{
 put("/open/**","ROLE_ANONYMOUS");
 put("/health","ROLE_ANONYMOUS");
 put("/restart","ROLE_ADMIN");
 put("/demo","ROLE_USER");
 }};

 @Override
 public Collection<ConfigAttribute> getAttributes(Object object) throws IllegalArgumentException {
 FilterInvocation fi = (FilterInvocation) object;
 String url = fi.getRequestUrl();
 for(Map.Entry<String,String> entry:urlRoleMap.entrySet()){
  if(antPathMatcher.match(entry.getKey(),url)){
  return SecurityConfig.createList(entry.getValue());
  }
 }
 // 返回代碼定義的默認配置
 return superMetadataSource.getAttributes(object);
 }

 @Override
 public boolean supports(Class<?> clazz) {
 return FilterInvocation.class.isAssignableFrom(clazz);
 }
}

@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true, securedEnabled = true)
public class SecurityConfiguration extends WebSecurityConfigurerAdapter {
 @Override
 protected void configure(HttpSecurity http) throws Exception {
 http
  .addFilterBefore(corsFilter, UsernamePasswordAuthenticationFilter.class)
  .exceptionHandling()
  .authenticationEntryPoint(problemSupport)
  .accessDeniedHandler(problemSupport)
 .and()
  .csrf()
  .disable()
  .headers()
  .frameOptions()
  .disable()
 .and()
  .sessionManagement()
  .sessionCreationPolicy(SessionCreationPolicy.STATELESS)
 .and()
  .authorizeRequests()
  // 自定義FilterInvocationSecurityMetadataSource
  .withObjectPostProcessor(new ObjectPostProcessor<FilterSecurityInterceptor>() {
  @Override
  public <O extends FilterSecurityInterceptor> O postProcess(
   O fsi) {
   fsi.setSecurityMetadataSource(mySecurityMetadataSource(fsi.getSecurityMetadataSource()));
   return fsi;
  }
  })
 .and()
  .apply(securityConfigurerAdapter());
 }

 @Bean
 public AppFilterInvocationSecurityMetadataSource mySecurityMetadataSource(FilterInvocationSecurityMetadataSource filterInvocationSecurityMetadataSource) {
 AppFilterInvocationSecurityMetadataSource securityMetadataSource = new AppFilterInvocationSecurityMetadataSource(filterInvocationSecurityMetadataSource);
 return securityMetadataSource;
}