原文地址：https://blog.csdn.net/larger5/article/details/81063438

一、前言

修改自前文，十分贴近公司开发的生产环境

前后端分离 SpringBoot + SpringSecurity 权限解决方案

RBAC（Role-Based Access Control，基于角色的访问控制）

二、代码

代码已经放在 github 上了：https://github.com/larger5/SpringBoot_SpringSecurity_JWT_RBAC.git

1、pom文件

       <!--安全框架-->

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-security</artifactId>

        </dependency>

        <!--JSON封装-->

        <dependency>

            <groupId>com.alibaba</groupId>

            <artifactId>fastjson</artifactId>

            <version>1.2.36</version>

        </dependency>

        <!--JWT-->

        <dependency>

            <groupId>io.jsonwebtoken</groupId>

            <artifactId>jjwt</artifactId>

            <version>0.9.0</version>

        </dependency>

2.AjaxResponseBody

package com.cun.security3.bean;

import java.io.Serializable;

public class AjaxResponseBody implements Serializable{

    private String status;
    private String msg;
    private Object result;
    private String jwtToken;

    public String getStatus() {
        return status;
    }

    public void setStatus(String status) {
        this.status = status;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public Object getResult() {
        return result;
    }

    public void setResult(Object result) {
        this.result = result;
    }

    public String getJwtToken() {
        return jwtToken;
    }

    public void setJwtToken(String jwtToken) {
        this.jwtToken = jwtToken;
    }
}

3.AjaxAccessDeniedHandler

package com.cun.security3.config;

import com.alibaba.fastjson.JSON;
import com.cun.security3.bean.AjaxResponseBody;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.web.access.AccessDeniedHandler;
import org.springframework.stereotype.Component;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Component
public class AjaxAccessDeniedHandler implements AccessDeniedHandler {

    @Override
    public void handle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, AccessDeniedException e) throws IOException, ServletException {
        AjaxResponseBody responseBody = new AjaxResponseBody();

        responseBody.setStatus("300");
        responseBody.setMsg("Need Authorities!");

        httpServletResponse.getWriter().write(JSON.toJSONString(responseBody));
    }
}

4.AjaxAuthenticationEntryPoint

package com.cun.security3.config;

import com.alibaba.fastjson.JSON;
import com.cun.security3.bean.AjaxResponseBody;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.AuthenticationEntryPoint;
import org.springframework.stereotype.Component;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Component
public class AjaxAuthenticationEntryPoint implements AuthenticationEntryPoint {

    @Override
    public void commence(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, AuthenticationException e) throws IOException, ServletException {
        AjaxResponseBody responseBody = new AjaxResponseBody();

        responseBody.setStatus("000");
        responseBody.setMsg("Need Authorities!");

        httpServletResponse.getWriter().write(JSON.toJSONString(responseBody));
    }
}

5.AjaxAuthenticationFailureHandler

package com.cun.security3.config;

import com.alibaba.fastjson.JSON;
import com.cun.security3.bean.AjaxResponseBody;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.authentication.AuthenticationFailureHandler;
import org.springframework.stereotype.Component;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Component
public class AjaxAuthenticationFailureHandler implements AuthenticationFailureHandler {

    @Override
    public void onAuthenticationFailure(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, AuthenticationException e) throws IOException, ServletException {
        AjaxResponseBody responseBody = new AjaxResponseBody();

        responseBody.setStatus("400");
        responseBody.setMsg("Login Failure!");

        httpServletResponse.getWriter().write(JSON.toJSONString(responseBody));
    }
}

6.AjaxAuthenticationSuccessHandler

package com.cun.security3.config;

import com.alibaba.fastjson.JSON;
import com.cun.security3.bean.AjaxResponseBody;
import com.cun.security3.utils.JwtTokenUtil;
import org.springframework.security.core.Authentication;
import org.springframework.security.web.authentication.AuthenticationSuccessHandler;
import org.springframework.stereotype.Component;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Component
public class AjaxAuthenticationSuccessHandler implements AuthenticationSuccessHandler {

    @Override
    public void onAuthenticationSuccess(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Authentication authentication) throws IOException, ServletException {
        AjaxResponseBody responseBody = new AjaxResponseBody();

        responseBody.setStatus("200");
        responseBody.setMsg("Login Success!");

        SelfUserDetails userDetails = (SelfUserDetails) authentication.getPrincipal();

        String jwtToken = JwtTokenUtil.generateToken(userDetails.getUsername(), 300, "_secret");
        responseBody.setJwtToken(jwtToken);

        httpServletResponse.getWriter().write(JSON.toJSONString(responseBody));
    }
}

7.AjaxLogoutSuccessHandler

package com.cun.security3.config;

import com.alibaba.fastjson.JSON;
import com.cun.security3.bean.AjaxResponseBody;
import org.springframework.security.core.Authentication;
import org.springframework.security.web.authentication.logout.LogoutSuccessHandler;
import org.springframework.stereotype.Component;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Component
public class AjaxLogoutSuccessHandler implements LogoutSuccessHandler {

    @Override
    public void onLogoutSuccess(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Authentication authentication) throws IOException, ServletException {
        AjaxResponseBody responseBody = new AjaxResponseBody();

        responseBody.setStatus("100");
        responseBody.setMsg("Logout Success!");

        httpServletResponse.getWriter().write(JSON.toJSONString(responseBody));
    }
}

8.JwtAuthenticationTokenFilter

package com.cun.security3.config;

import com.cun.security3.utils.JwtTokenUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.web.authentication.WebAuthenticationDetailsSource;
import org.springframework.stereotype.Component;
import org.springframework.web.filter.OncePerRequestFilter;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;


@Component
public class JwtAuthenticationTokenFilter extends OncePerRequestFilter {

    @Autowired
    SelfUserDetailsService userDetailsService;

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain chain) throws ServletException, IOException {
        String authHeader = request.getHeader("Authorization");

        if (authHeader != null && authHeader.startsWith("Bearer ")) {
            final String authToken = authHeader.substring("Bearer ".length());

            String username = JwtTokenUtil.parseToken(authToken, "_secret");

            if (username != null && SecurityContextHolder.getContext().getAuthentication() == null) {
                UserDetails userDetails = userDetailsService.loadUserByUsername(username);

                if (userDetails != null) {
                    UsernamePasswordAuthenticationToken authentication =
                            new UsernamePasswordAuthenticationToken(userDetails, null, userDetails.getAuthorities());
                    authentication.setDetails(new WebAuthenticationDetailsSource().buildDetails(request));

                    SecurityContextHolder.getContext().setAuthentication(authentication);
                }
            }
        }

        chain.doFilter(request, response);
    }
}

9.RbacAuthorityService

package com.cun.security3.config;

import org.springframework.security.core.Authentication;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.stereotype.Component;
import org.springframework.util.AntPathMatcher;

import javax.servlet.http.HttpServletRequest;
import java.util.HashSet;
import java.util.Set;

@Component("rbacauthorityservice")
public class RbacAuthorityService {
    public boolean hasPermission(HttpServletRequest request, Authentication authentication) {

        Object userInfo = authentication.getPrincipal();

        boolean hasPermission  = false;

        if (userInfo instanceof UserDetails) {

            String username = ((UserDetails) userInfo).getUsername();

            //获取资源
            Set urls = new HashSet();
            urls.add("/common/**"); // 这些 url 都是要登录后才能访问，且其他的 url 都不能访问！
            Set set2 = new HashSet();
            Set set3 = new HashSet();

            AntPathMatcher antPathMatcher = new AntPathMatcher();

            for (String url : urls) {
                if (antPathMatcher.match(url, request.getRequestURI())) {
                    hasPermission = true;
                    break;
                }
            }

            return hasPermission;
        } else {
            return false;
        }
    }
}

10.SelfUserDetails

package com.cun.security3.config;

import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;

import java.io.Serializable;
import java.util.Collection;
import java.util.Set;

/**
 *  ① 定义 user 对象
 */
public class SelfUserDetails implements UserDetails, Serializable {
    private String username;
    private String password;
    private Set authorities;

    @Override
    public Collection getAuthorities() {
        return this.authorities;
    }

    public void setAuthorities(Set authorities) {
        this.authorities = authorities;
    }

    @Override
    public String getPassword() { // 最重点Ⅰ
        return this.password;
    }

    @Override
    public String getUsername() { // 最重点Ⅱ
        return this.username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public boolean isAccountNonExpired() {
        return true;
    }

    @Override
    public boolean isAccountNonLocked() {
        return true;
    }

    @Override
    public boolean isCredentialsNonExpired() {
        return true;
    }

    @Override
    public boolean isEnabled() {
        return true;
    }
}

11.SelfUserDetailsService

package com.cun.security3.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.stereotype.Component;

import java.util.HashSet;
import java.util.Set;

@Component
public class SelfUserDetailsService implements UserDetailsService {
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        //构建用户信息的逻辑(取数据库/LDAP等用户信息)

        SelfUserDetails userInfo = new SelfUserDetails();
        userInfo.setUsername(username);
        userInfo.setPassword(new BCryptPasswordEncoder().encode("123"));

        Set authoritiesSet = new HashSet();
        GrantedAuthority authority = new SimpleGrantedAuthority("ROLE_ADMIN");
        authoritiesSet.add(authority);
        userInfo.setAuthorities(authoritiesSet);

        return userInfo;
    }
}

12.SpringSecurityConf

package com.cun.security3.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

@Configuration
public class SpringSecurityConf extends WebSecurityConfigurerAdapter {

    @Autowired
    AjaxAuthenticationEntryPoint authenticationEntryPoint;  //  未登陆时返回 JSON 格式的数据给前端（否则为 html）

    @Autowired
    AjaxAuthenticationSuccessHandler authenticationSuccessHandler;  // 登录成功返回的 JSON 格式数据给前端（否则为 html）

    @Autowired
    AjaxAuthenticationFailureHandler authenticationFailureHandler;  //  登录失败返回的 JSON 格式数据给前端（否则为 html）

    @Autowired
    AjaxLogoutSuccessHandler  logoutSuccessHandler;  // 注销成功返回的 JSON 格式数据给前端（否则为 登录时的 html）

    @Autowired
    AjaxAccessDeniedHandler accessDeniedHandler;    // 无权访问返回的 JSON 格式数据给前端（否则为 403 html 页面）

    @Autowired
    SelfUserDetailsService userDetailsService; // 自定义user

    @Autowired
    JwtAuthenticationTokenFilter jwtAuthenticationTokenFilter; // JWT 拦截器

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {

        // 加入自定义的安全认证
        auth.userDetailsService(userDetailsService).passwordEncoder(new BCryptPasswordEncoder());
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {

        // 去掉 CSRF
        http.csrf().disable()
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS) // 使用 JWT，关闭token
                .and()

                .httpBasic().authenticationEntryPoint(authenticationEntryPoint)

                .and()
                .authorizeRequests()

                .anyRequest()
                .access("@rbacauthorityservice.hasPermission(request,authentication)") // RBAC 动态 url 认证

                .and()
                .formLogin()  //开启登录
                .successHandler(authenticationSuccessHandler) // 登录成功
                .failureHandler(authenticationFailureHandler) // 登录失败
                .permitAll()

                .and()
                .logout()
                .logoutSuccessHandler(logoutSuccessHandler)
                .permitAll();

        // 记住我
        http.rememberMe().rememberMeParameter("remember-me")
                .userDetailsService(userDetailsService).tokenValiditySeconds(300);

        http.exceptionHandling().accessDeniedHandler(accessDeniedHandler); // 无权访问 JSON 格式的数据
        http.addFilterBefore(jwtAuthenticationTokenFilter, UsernamePasswordAuthenticationFilter.class); // JWT Filter

    }
}

13.JwtTokenUtil

package com.cun.security3.utils;

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;

import java.io.InputStream;
import java.security.KeyStore;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.util.Date;

public class JwtTokenUtil {

    private static InputStream inputStream = Thread.currentThread().getContextClassLoader().getResourceAsStream("jwt.jks"); // 寻找证书文件
    private static PrivateKey privateKey = null;
    private static PublicKey publicKey = null;

    static { // 将证书文件里边的私钥公钥拿出来
        try {
            KeyStore keyStore = KeyStore.getInstance("JKS"); // java key store 固定常量
            keyStore.load(inputStream, "123456".toCharArray());
            privateKey = (PrivateKey) keyStore.getKey("jwt", "123456".toCharArray()); // jwt 为 命令生成整数文件时的别名
            publicKey = keyStore.getCertificate("jwt").getPublicKey();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static String generateToken(String subject, int expirationSeconds, String salt) {
        return Jwts.builder()
                .setClaims(null)
                .setSubject(subject)
                .setExpiration(new Date(System.currentTimeMillis() + expirationSeconds * 1000))
//                .signWith(SignatureAlgorithm.HS512, salt) // 不使用公钥私钥
                .signWith(SignatureAlgorithm.RS256, privateKey)
                .compact();
    }

    public static String parseToken(String token, String salt) {
        String subject = null;
        try {
            Claims claims = Jwts.parser()
//                    .setSigningKey(salt) // 不使用公钥私钥
                    .setSigningKey(publicKey)
                    .parseClaimsJws(token).getBody();
            subject = claims.getSubject();
        } catch (Exception e) {
        }
        return subject;
    }

}

三、其他

不足	解决
没有注销 token 登陆	每次登陆，生成 token 放到 Redis 数据库里边，调用接口的时候，先查有没有这个 token，注销时把 token 删除

四、测试示例（2018/8/29更新）

由于网友对 jwt 的使用方式存在疑问，这里更新一下测试方法，
借助了 postman，每次请求都是 ajax 方式，注意 get/post 等类型

1.登录示例

①注意是 post 请求，请求 /login，存好返回给你的 jwtToken，以后每次请求都要带上它

2.访问内部示例

① 注意任何请求要带上 jwtToken，不像之前的基于 Session，一登录成功就完事。
② 若还是请求失败，看 RbacAuthorityService 是否开放了该 url 。