springboot2.0整合springsecurity前后端分离进行自定义权限控制

　　在阅读本文之前可以先看看springsecurity的基本执行流程，下面我展示一些核心配置文件，后面给出完整的整合代码到git上面，有兴趣的小伙伴可以下载进行研究

　　使用maven工程构建项目，首先需要引入最核心的依赖，

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>

由于这里我们整合的项目进行了前后端分离，所以我们首先需要自定义登录成功和失败，登出成功的自定义处理类

其实就是实现不同的handler即可：1.首先我们来看登录成功的处理类

/**
 * 处理登录验证成功的类
 * @author zhoukebo
 * @date 2018/9/4
 */
@Component
public class FuryAuthSuccessHandler implements AuthenticationSuccessHandler {
    /**Json转化工具*/
    @Autowired
    private ObjectMapper objectMapper;

    @Override
    public void onAuthenticationSuccess(HttpServletRequest request,HttpServletResponse response, Authentication authentication) throws IOException{
        SysUser userDetails = (SysUser)authentication.getPrincipal();
        System.out.println("管理员 " + userDetails.getUsername() + " 登录");
        Map<String,String> map=new HashMap<>(2);
        map.put("code", "200");
        map.put("msg", "登录成功");
        response.setContentType("application/json;charset=UTF-8");
        response.getWriter().write(objectMapper.writeValueAsString(map));
    }

}

2.登录验证失败的类

/**
 * 处理登录验证失败的类
 * @author zhoukebo
 * @date 2018/9/4
 */
@Component
public class FuryAuthFailureHandler implements AuthenticationFailureHandler {

    @Autowired
    private ObjectMapper objectMapper;

    @Override
    public void onAuthenticationFailure(HttpServletRequest request, HttpServletResponse response, AuthenticationException exception) throws IOException, ServletException {
        System.out.println("登录验证失败");
        Map<String,String> map=new HashMap<>(2);
        map.put("code", "10001");
        map.put("msg", exception.getMessage());
        response.setContentType("application/json;charset=UTF-8");
        response.getWriter().write(objectMapper.writeValueAsString(map));
    }
}

3.自定义处理注销成功的类

/**
 * 处理注销成功
 * @author zhoukebo
 * @date 2018/9/4
 */
@Component
public class MyLogoutSuccessHandler implements LogoutSuccessHandler {

    /**Json转化工具*/
    @Autowired
    private ObjectMapper objectMapper;

    @Override
    public void onLogoutSuccess(HttpServletRequest request, HttpServletResponse response, Authentication authentication) throws IOException{
        Map<String,String> map=new HashMap<>(2);
        map.put("code", "200");
        map.put("msg", "登出成功");
        response.setContentType("application/json;charset=UTF-8");
        response.getWriter().write(objectMapper.writeValueAsString(map));
    }
}

4.自定义没有权限的处理类

/**
 * 处理没有权限的类
 * @author zhoukebo
 * @date 2018/9/5
 */
@Component
public class RestAuthAccessDeniedHandler implements AccessDeniedHandler {

    @Autowired
    private ObjectMapper objectMapper;

    @Override
    public void handle(HttpServletRequest request, HttpServletResponse response, AccessDeniedException e) throws IOException, ServletException {
        Map<String,String> map=new HashMap<>(2);
        map.put("code", "403");
        map.put("msg", e.getMessage());
        response.setContentType("application/json;charset=UTF-8");
        response.getWriter().write(objectMapper.writeValueAsString(map));
    }
}

然后对springsecurity进行详细的配置需要继承WebSecurityConfigurerAdapter类，下面是配置文件的详情

/**
 * spring Security配置安全控制中心
 *
 * @author zhoukb
 */
@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
    /**
     * 依赖注入自定义的登录成功处理器
     */
    @Autowired
    private FuryAuthSuccessHandler furyAuthSuccessHandler;
    /**
     * 依赖注入自定义的登录失败处理器
     */
    @Autowired
    private FuryAuthFailureHandler furyAuthFailureHandler;
    /**
     * 依赖注入自定义的注销成功的处理器
     */
    @Autowired
    private MyLogoutSuccessHandler myLogoutSuccessHandler;

    /**
     * 注册没有权限的处理器
     */
    @Autowired
    private RestAuthAccessDeniedHandler restAuthAccessDeniedHandler;

    /***注入自定义的CustomPermissionEvaluator*/
    @Bean
    public DefaultWebSecurityExpressionHandler webSecurityExpressionHandler() {
        DefaultWebSecurityExpressionHandler handler = new DefaultWebSecurityExpressionHandler();
        handler.setPermissionEvaluator(new CustomPermissionEvaluator());
        return handler;
    }

    /***注入我们自己的登录逻辑验证器AuthenticationProvider*/
    @Autowired
    private AuthenticationProvider authenticationProvider;

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        //这里可启用我们自己的登陆验证逻辑
        auth.authenticationProvider(authenticationProvider);
    }

    /**
     * 配置spring security的控制逻辑
     */
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests()
                //"/login"不进行权限验证
                .antMatchers("/login").permitAll()
                .antMatchers("/favicon.ico").permitAll()
                .anyRequest().authenticated()   //其他的需要登陆后才能访问
                .and()
                .formLogin()
                //loginProcessingUrl用于指定前后端分离的时候调用后台登录接口的名称
                .loginProcessingUrl("/login")
                //配置登录成功的自定义处理类
                .successHandler(furyAuthSuccessHandler)
                //配置登录失败的自定义处理类
                .failureHandler(furyAuthFailureHandler)
                .and()
                //loginProcessingUrl用于指定前后端分离的时候调用后台注销接口的名称
                .logout().logoutUrl("/logout")
                .logoutSuccessHandler(myLogoutSuccessHandler)
                .and()
                //配置没有权限的自定义处理类
                .exceptionHandling().accessDeniedHandler(restAuthAccessDeniedHandler)
                .and()
                .cors()//新加入
                .and()
                .csrf().disable();// 取消跨站请求伪造防护
    }
}

上面我们配置了自定义的登录逻辑的验证MyAuthenticationProvider，和自定义的权限验证CustomPermissionEvaluator代码如下

/**
 * 实现自己的AuthenticationProvider类，用来自定义用户校验机制
 * @author zhoukebo
 * @date 2018/9/5
 */
@Component
public class MyAuthenticationProvider implements AuthenticationProvider {

    @Autowired
    private CustomerDetailService customerDetailService;

    @Override
    public Authentication authenticate(Authentication authentication) throws AuthenticationException {
        // 获取表单输入中返回的用户名;
        String userName = (String) authentication.getPrincipal();
        // 获取表单中输入的密码；
        String password = (String) authentication.getCredentials();
        // 这里调用我们的自己写的获取用户的方法；
        UserDetails userInfo = customerDetailService.loadUserByUsername(userName);
        if (userInfo == null) {
            throw new BadCredentialsException("用户名不存在");
        }

        // 这里我们还要判断密码是否正确，这里我们的密码使用BCryptPasswordEncoder进行加密的
        if (!new BCryptPasswordEncoder().matches(password, userInfo.getPassword())) {
            throw new BadCredentialsException("密码不正确");
        }
        // 这里还可以加一些其他信息的判断，比如用户账号已停用等判断。

        Collection<? extends GrantedAuthority> authorities = userInfo.getAuthorities();
        // 构建返回的用户登录成功的token
        return new UsernamePasswordAuthenticationToken(userInfo, password, authorities);
    }

    @Override
    public boolean supports(Class<?> authentication) {
//      这里直接改成retrun true;表示是支持这个执行
        return true;
    }
}

/**
 * 我们需要自定义对hasPermission()方法的处理，
 * 就需要自定义PermissionEvaluator，创建类CustomPermissionEvaluator，实现PermissionEvaluator接口。
 * @author zhoukebo
 * @date 2018/9/5
 */
@Component
public class CustomPermissionEvaluator implements PermissionEvaluator {
    /**
     * 自定义验证方法
     * @param authentication        登录的时候存储的用户信息
     * @param targetDomainObject    @PreAuthorize("hasPermission('/hello/**','r')") 中hasPermission的第一个参数
     * @param permission            @PreAuthorize("hasPermission('/hello/**','r')") 中hasPermission的第二个参数
     * @return
     */
    @Override
    public boolean hasPermission(Authentication authentication, Object targetDomainObject, Object permission) {
        // 获得loadUserByUsername()方法的结果
        SysUser user = (SysUser)authentication.getPrincipal();
        // 获得loadUserByUsername()中注入的权限
        Collection<? extends GrantedAuthority> authorities = user.getAuthorities();
        // 遍历用户权限进行判定
        for(GrantedAuthority authority : authorities) {
            UrlGrantedAuthority urlGrantedAuthority = (UrlGrantedAuthority) authority;
            String permissionUrl = urlGrantedAuthority.getPermissionUrl();
            // 如果访问的Url和权限用户符合的话，返回true
            if(targetDomainObject.equals(permissionUrl)) {
                return true;
            }
        }
        return false;
    }

    @Override
    public boolean hasPermission(Authentication authentication, Serializable targetId, String targetType, Object permission) {
        return false;
    }
}

注意：上面的自定义权限要生效还需要在WebSecurityConfig上面加上注解@EnableGlobalMethodSecurity(prePostEnabled = true)

完成登录逻辑还需要我们实现UserDetailsService接口，以便系统能够根据用户名去获取用户的信息，里面还可加上自己的逻辑

/**
 * 需要自定义UserDetailsService实现spring security的UserDetailsService接口
 * @author zhoukebo
 * @date 2018/9/4
 */
@Service
public class CustomerDetailService implements UserDetailsService {

    @Autowired
    SysUserRepository userRepository;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        SysUser user = userRepository.findByUsername(username);
        if (user == null) {
            throw new UsernameNotFoundException("用户名不存在");
        }
        List<SysRole> roles = user.getRoles();

        //将所有的角色对应的资源权限全部放入user对应的grantedAuthority集合中
        for (SysRole role : roles) {
            List<SysResource> resources = role.getResources();
            List<GrantedAuthority> grantedAuthorities = new ArrayList<>();
            for (SysResource resource : resources) {
                if (resource != null && resource.getResourceName()!=null) {
                    GrantedAuthority grantedAuthority = new UrlGrantedAuthority(resource.getMethodPath(),resource.getResourceName());
                    grantedAuthorities.add(grantedAuthority);
                }
            }
            user.setGrantedAuthority(grantedAuthorities);
        }

        System.out.println("s:" + username);
        return user;
    }
}

以上就完成了springboot和springsecurity的整合工作，demo中包含两种自定义权限验证，有兴趣的小伙伴可以自行在github上面下载下来研究，不懂得可以交流，代码有什么不妥的地方也望大家互相指教

github示例代码