方法安全（Method Security）

@Bean
@Role(BeanDefinition.ROLE_INFRASTRUCTURE)
static Advisor preAuthorizeMethodInterceptor() {
    return AuthorizationManagerBeforeMethodInterceptor.preAuthorize();
}

@Bean
@Role(BeanDefinition.ROLE_INFRASTRUCTURE)
static Advisor postAuthorizeMethodInterceptor() {
    return AuthorizationManagerAfterMethodInterceptor.postAuthorize();
}

@Bean
@Role(BeanDefinition.ROLE_INFRASTRUCTURE)
static Advisor preFilterMethodInterceptor() {
    return AuthorizationManagerBeforeMethodInterceptor.preFilter();
}

@Bean
@Role(BeanDefinition.ROLE_INFRASTRUCTURE)
static Advisor postFilterMethodInterceptor() {
    return AuthorizationManagerAfterMethodInterceptor.postFilter();
}

@PreAuthorize("hasAuthority('permission:read') || hasRole('ADMIN')")

@Bean
static RoleHierarchy roleHierarchy() {
    return new RoleHierarchyImpl("ROLE_ADMIN > permission:read");
}

@PreAuthorize("hasAuthority('permission:read')")

@Component
public class BankService {
	@PreAuthorize("hasRole('ADMIN')")
	public Account readAccount(Long id) {
        // ... is only invoked if the `Authentication` has the `ROLE_ADMIN` authority
	}
}

@Autowired
BankService bankService;

@WithMockUser(roles="ADMIN")
@Test
void readAccountWithAdminRoleThenInvokes() {
    Account account = this.bankService.readAccount("12345678");
    // ... assertions
}

@WithMockUser(roles="WRONG")
@Test
void readAccountWithWrongRoleThenAccessDenied() {
    assertThatExceptionOfType(AccessDeniedException.class).isThrownBy(
        () -> this.bankService.readAccount("12345678"));
}

@Component
public class BankService {
	@PostAuthorize("returnObject.owner == authentication.name")
	public Account readAccount(Long id) {
        // ... is only returned if the `Account` belongs to the logged in user
	}
}

@Autowired
BankService bankService;

@WithMockUser(username="owner")
@Test
void readAccountWhenOwnedThenReturns() {
    Account account = this.bankService.readAccount("12345678");
    // ... assertions
}

@WithMockUser(username="wrong")
@Test
void readAccountWhenNotOwnedThenAccessDenied() {
    assertThatExceptionOfType(AccessDeniedException.class).isThrownBy(
        () -> this.bankService.readAccount("12345678"));
}

@Target({ ElementType.METHOD, ElementType.TYPE })
@Retention(RetentionPolicy.RUNTIME)
@PostAuthorize("returnObject.owner == authentication.name")
public @interface RequireOwnership {}

@Component
public class BankService {
	@RequireOwnership
	public Account readAccount(Long id) {
        // ... is only returned if the `Account` belongs to the logged in user
	}
}

@Component
public class BankService {
	@PreFilter("filterObject.owner == authentication.name")
	public Collection<Account> updateAccounts(Account... accounts) {
        // ... `accounts` will only contain the accounts owned by the logged-in user
        return updated;
	}
}

@Autowired
BankService bankService;

@WithMockUser(username="owner")
@Test
void updateAccountsWhenOwnedThenReturns() {
    Account ownedBy = ...
    Account notOwnedBy = ...
    Collection<Account> updated = this.bankService.updateAccounts(ownedBy, notOwnedBy);
    assertThat(updated).containsOnly(ownedBy);
}

@PreFilter("filterObject.owner == authentication.name")
public Collection<Account> updateAccounts(Account[] accounts)

@PreFilter("filterObject.owner == authentication.name")
public Collection<Account> updateAccounts(Collection<Account> accounts)

@PreFilter("filterObject.value.owner == authentication.name")
public Collection<Account> updateAccounts(Map<String, Account> accounts)

@PreFilter("filterObject.owner == authentication.name")
public Collection<Account> updateAccounts(Stream<Account> accounts)

@Component
public class BankService {
	@PostFilter("filterObject.owner == authentication.name")
	public Collection<Account> readAccounts(String... ids) {
        // ... the return value will be filtered to only contain the accounts owned by the logged-in user
        return accounts;
	}
}

@Autowired
BankService bankService;

@WithMockUser(username="owner")
@Test
void readAccountsWhenOwnedThenReturns() {
    Collection<Account> accounts = this.bankService.updateAccounts("owner", "not-owner");
    assertThat(accounts).hasSize(1);
    assertThat(accounts.get(0).getOwner()).isEqualTo("owner");
}

@EnableMethodSecurity(securedEnabled = true)

@EnableMethodSecurity(jsr250Enabled = true)

@Controller
@PreAuthorize("hasAuthority('ROLE_USER')")
public class MyController {
    @GetMapping("/endpoint")
    public String endpoint() { ... }
}

@Controller
@PreAuthorize("hasAuthority('ROLE_USER')")
public class MyController {
    @GetMapping("/endpoint")
    @PreAuthorize("hasAuthority('ROLE_ADMIN')")
    public String endpoint() { ... }
}

@Target({ ElementType.METHOD, ElementType.TYPE })
@Retention(RetentionPolicy.RUNTIME)
@PreAuthorize("hasRole('ADMIN')")
public @interface IsAdmin {}

@Component
public class BankService {
	@IsAdmin
	public Account readAccount(Long id) {
        // ... is only returned if the `Account` belongs to the logged in user
	}
}

@Configuration
@EnableMethodSecurity(prePostEnabled = false)
class MethodSecurityConfig {
	@Bean
	@Role(BeanDefinition.ROLE_INFRASTRUCTURE)
	Advisor postAuthorize() {
		return AuthorizationManagerBeforeMethodInterceptor.postAuthorize();
	}
}

@Component("authz")
public class AuthorizationLogic {
    public boolean decide(MethodSecurityExpressionOperations operations) {
        // ... authorization logic
    }
}

@Controller
public class MyController {
    @PreAuthorize("@authz.decide(#root)")
    @GetMapping("/endpoint")
    public String endpoint() {
        // ...
    }
}

@Component
public class MyAuthorizationManager implements AuthorizationManager<MethodInvocation> {
    public AuthorizationDecision check(Supplier<Authentication> authentication, MethodInvocation invocation) {
        // ... authorization logic
    }
}

@Configuration
@EnableMethodSecurity(prePostEnabled = false)
class MethodSecurityConfig {
    @Bean
	@Role(BeanDefinition.ROLE_INFRASTRUCTURE)
	Advisor postAuthorize(MyAuthorizationManager manager) {
		return AuthorizationManagerBeforeMethodInterceptor.preAuthorize(manager);
	}

	@Bean
	@Role(BeanDefinition.ROLE_INFRASTRUCTURE)
	Advisor postAuthorize(MyAuthorizationManager manager) {
		return AuthorizationManagerAfterMethodInterceptor.postAuthorize(manager);
	}
}

@Bean
static MethodSecurityExpressionHandler methodSecurityExpressionHandler(RoleHierarchy roleHierarchy) {
	DefaultMethodSecurityExpressionHandler handler = new DefaultMethodSecurityExpressionHandler();
	handler.setRoleHierarchy(roleHierarchy);
	return handler;
}

import static org.springframework.security.authorization.AuthorityAuthorizationManager.hasRole;

@Bean
@Role(BeanDefinition.ROLE_INFRASTRUCTURE)
static Advisor protectServicePointcut() {
    JdkRegexpMethodPointcut pattern = new JdkRegexpMethodPointcut();
    pattern.setPattern("execution(* com.mycompany.*Service.*(..))");
    return new AuthorizationManagerBeforeMethodInterceptor(pattern, hasRole("USER"));
}

@EnableMethodSecurity(mode=AdviceMode.ASPECTJ)

@Component
public class MyService {
    @PreAuthorize("denyAll") (1)
    MyResource myDeprecatedMethod(...);

    @PreAuthorize("hasRole('ADMIN')") (2)
    MyResource writeResource(...)

    @PreAuthorize("hasAuthority('db') and hasRole('ADMIN')") (3)
    MyResource deleteResource(...)

    @PreAuthorize("principal.claims['aud'] == 'my-audience'") (4)
    MyResource readResource(...);

	@PreAuthorize("@authz.check(authentication, #root)")
    MyResource shareResource(...);
}

@EnableGlobalMethodSecurity(prePostEnabled = true)

@EnableMethodSecurity

@EnableGlobalMethodSecurity(securedEnabled = true)

@EnableMethodSecurity(securedEnabled = true, prePostEnabled = false)

class MyAuthorizer {
	boolean isAdmin(MethodSecurityExpressionOperations root) {
		boolean decision = root.hasAuthority("ADMIN");
		// custom work ...
        return decision;
	}
}

@PreAuthorize("@authz.isAdmin(#root)")