Spring Boot中使用 Spring Security 构建权限系统的示例代码

  org.springframework.bootspring-boot-starter-security

 public interface UserDetails extends Serializable { //返回分配给用户的角色列表 Collection getAuthorities(); //返回密码 String getPassword(); //返回帐号 String getUsername(); // 账户是否未过期 boolean isAccountNonExpired(); // 账户是否未锁定 boolean isAccountNonLocked(); // 密码是否未过期 boolean isCredentialsNonExpired(); // 账户是否激活 boolean isEnabled(); } 

 public interface UserDetailsService { UserDetails loadUserByUsername(String var1) throws UsernameNotFoundException; }

 /** * Created by Yuicon on 2017/5/14. */ public class User implements UserDetails { private final String id; //帐号,这里是我数据库里的字段 private final String account; //密码 private final String password; //角色集合 private final Collection authorities; User(String id, String account, String password, Collection authorities) { this.id = id; this.account = account; this.password = password; this.authorities = authorities; } //返回分配给用户的角色列表 @Override public Collection getAuthorities() { return authorities; } @JsonIgnore public String getId() { return id; } @JsonIgnore @Override public String getPassword() { return password; } //虽然我数据库里的字段是 `account` ,这里还是要写成 `getUsername()`,因为是继承的接口 @Override public String getUsername() { return account; } // 账户是否未过期 @JsonIgnore @Override public boolean isAccountNonExpired() { return true; } // 账户是否未锁定 @JsonIgnore @Override public boolean isAccountNonLocked() { return true; } // 密码是否未过期 @JsonIgnore @Override public boolean isCredentialsNonExpired() { return true; } // 账户是否激活 @JsonIgnore @Override public boolean isEnabled() { return true; } } 

 /** * Created by Yuicon on 2017/5/14. */ @Service public class UserDetailsServiceImpl implements UserDetailsService { // jpa @Autowired private UserRepository userRepository; /** * 提供一种从用户名可以查到用户并返回的方法 * @param account 帐号 * @return UserDetails * @throws UsernameNotFoundException */ @Override public UserDetails loadUserByUsername(String account) throws UsernameNotFoundException { // 这里是数据库里的用户类 User user = userRepository.findByAccount(account); if (user == null) { throw new UsernameNotFoundException(String.format("没有该用户 '%s'.", account)); } else { //这里返回上面继承了 UserDetails 接口的用户类,为了简单我们写个工厂类 return UserFactory.create(user); } } } 

 /** * Created by Yuicon on 2017/5/14. */ final class UserFactory { private UserFactory() { } static User create(User user) { return new User( user.getId(), user.getAccount(), user.getPassword(), mapToGrantedAuthorities(user.getRoles().stream().map(Role::getName).collect(Collectors.toList())) ); } //将与用户类一对多的角色类的名称集合转换为 GrantedAuthority 集合 private static List mapToGrantedAuthorities(List authorities) { return authorities.stream() .map(SimpleGrantedAuthority::new) .collect(Collectors.toList()); } } 

 /** * Created by Yuicon on 2017/5/14. */ @Configuration @EnableWebSecurity @EnableGlobalMethodSecurity(prePostEnabled = true) public class WebSecurityConfig extends WebSecurityConfigurerAdapter { // Spring会自动寻找实现接口的类注入,会找到我们的 UserDetailsServiceImpl 类 @Autowired private UserDetailsService userDetailsService; @Autowired public void configureAuthentication(AuthenticationManagerBuilder authenticationManagerBuilder) throws Exception { authenticationManagerBuilder // 设置UserDetailsService .userDetailsService(this.userDetailsService) // 使用BCrypt进行密码的hash .passwordEncoder(passwordEncoder()); } // 装载BCrypt密码编码器 @Bean public PasswordEncoder passwordEncoder() { return new BCryptPasswordEncoder(); } //允许跨域 @Bean public WebMvcConfigurer corsConfigurer() { return new WebMvcConfigurerAdapter() { @Override public void addCorsMappings(CorsRegistry registry) { registry.addMapping("/**").allowedOrigins("*") .allowedMethods("GET", "HEAD", "POST","PUT", "DELETE", "OPTIONS") .allowCredentials(false).maxAge(3600); } }; } @Override protected void configure(HttpSecurity httpSecurity) throws Exception { httpSecurity // 取消csrf .csrf().disable() // 基于token，所以不需要session .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and() .authorizeRequests() .antMatchers(HttpMethod.OPTIONS, "/**").permitAll() // 允许对于网站静态资源的无授权访问 .antMatchers( HttpMethod.GET, "/", "/*.html", "/favicon.ico", "/**/*.html", "/**/*.css", "/**/*.js", "/webjars/**", "/swagger-resources/**", "/*/api-docs" ).permitAll() // 对于获取token的rest api要允许匿名访问 .antMatchers("/auth/**").permitAll() // 除上面外的所有请求全部需要鉴权认证 .anyRequest().authenticated(); // 禁用缓存 httpSecurity.headers().cacheControl(); } } 

 /** * 在 @PreAuthorize 中我们可以利用内建的 SPEL 表达式：比如 'hasRole()' 来决定哪些用户有权访问。 * 需注意的一点是 hasRole 表达式认为每个角色名字前都有一个前缀 'ROLE_'。所以这里的 'ADMIN' 其实在 * 数据库中存储的是 'ROLE_ADMIN' 。这个 @PreAuthorize 可以修饰Controller也可修饰Controller中的方法。 **/ @RestController @RequestMapping("/users") @PreAuthorize("hasRole('USER')") //有ROLE_USER权限的用户可以访问 public class UserController { @Autowired private UserRepository repository; @PreAuthorize("hasRole('ADMIN')")//有ROLE_ADMIN权限的用户可以访问 @RequestMapping(method = RequestMethod.GET) public List getUsers() { return repository.findAll(); } }