SpringCloud Alibaba Security安全认证

一、 Security配置（auth认证中心）

代码地址

https://github.com/typ1805/blog-cloud

Spring Security是一套安全框架，可以基于RBAC（基于角色的权限控制）对用户的访问权限进行控制。

添加依赖

 <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-security</artifactId>
 </dependency>
<dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<dependency>
     <groupId>com.nimbusds</groupId>
     <artifactId>nimbus-jose-jwt</artifactId>
</dependency>

1、WebSecurityConfig

登录认证授权等主要采用Spring security + JWT，首先配置WebSecurityConfig，Redis配置主要是为了满足需:

  • 当用户的角色或者权限变动后
  • 已获授权的用户需要重新登录授权
package com.blog.config;

import com.blog.jwt.JWTAuthenticationEntryPoint;
import com.blog.jwt.JWTAuthenticationFilter;
import com.blog.jwt.JWTAuthorizationFilter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.http.HttpMethod;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

/**
 * @path：com.blog.config.WebSecurityConfig.java
 * @className：WebSecurityConfig.java
 * @description：Security配置
 * @author：tanyp
 * @dateTime：2020/11/9 16:31 
 * @editNote：
 */
@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    @Qualifier("userDetailsServiceImpl")
    private UserDetailsService userDetailsService;

    @Autowired
    private StringRedisTemplate redisTemplate;

    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService).passwordEncoder(passwordEncoder());
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.csrf().disable()
                .authorizeRequests()
                .antMatchers("/login").permitAll()
                .anyRequest().authenticated()
                .and()
                .addFilterBefore(new JWTAuthenticationFilter(authenticationManager(), redisTemplate), UsernamePasswordAuthenticationFilter.class)
                .addFilterBefore(new JWTAuthorizationFilter(authenticationManager()), UsernamePasswordAuthenticationFilter.class)
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                .and()
                .exceptionHandling().authenticationEntryPoint(new JWTAuthenticationEntryPoint());
    }

}

2、UserDetailsServiceImpl

通过用户名去查找用户及拥有的角色和权限

package com.blog.service;

import com.blog.domain.AuthUser;
import com.blog.common.core.constants.Constants;
import com.blog.common.core.constants.JWTConstants;
import com.blog.common.core.result.Wrapper;
import com.blog.provider.UserProvider;
import com.blog.vo.MenuVo;
import com.blog.vo.RoleVo;
import com.blog.vo.UserVo;
import org.apache.dubbo.config.annotation.DubboReference;
import org.springframework.beans.BeanUtils;
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.stereotype.Service;
import org.springframework.util.StringUtils;

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

/**
 * @path：com.blog.service.impl.UserDetailsServiceImpl.java
 * @className：UserDetailsServiceImpl.java
 * @description：自定义用户认证和授权
 * @author：tanyp
 * @dateTime：2020/11/9 15:44 
 * @editNote：
 */
@Service
public class UserDetailsServiceImpl implements UserDetailsService {

    @DubboReference
    private UserProvider userProvider;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        Wrapper<UserVo> userInfo = userProvider.findByUsername(username);
        if (userInfo.getCode() != Constants.SUCCESS) {
            throw new UsernameNotFoundException("用户:" + username + ",不存在!");
        }

        Set<SimpleGrantedAuthority> grantedAuthorities = new HashSet<>();
        UserVo userVo = new UserVo();
        BeanUtils.copyProperties(userInfo.getResult(), userVo);

        Wrapper<List<RoleVo>> roleInfo = userProvider.getRoleByUserId(String.valueOf(userVo.getId()));
        if (roleInfo.getCode() == Constants.SUCCESS) {
            List<RoleVo> roleVoList = roleInfo.getResult();
            for (RoleVo role : roleVoList) {
                // 角色必须是ROLE_开头，可以在数据库中设置
                SimpleGrantedAuthority grantedAuthority = new SimpleGrantedAuthority(JWTConstants.ROLE_PREFIX + role.getValue());
                grantedAuthorities.add(grantedAuthority);

                // 获取权限
                Wrapper<List<MenuVo>> menuInfo = userProvider.getRolePermission(String.valueOf(role.getId()));
                if (menuInfo.getCode() == Constants.SUCCESS) {
                    List<MenuVo> permissionList = menuInfo.getResult();
                    for (MenuVo menu : permissionList) {
                        if (!StringUtils.isEmpty(menu.getUrl())) {
                            SimpleGrantedAuthority authority = new SimpleGrantedAuthority(menu.getUrl());
                            grantedAuthorities.add(authority);
                        }
                    }
                }
            }
        }

        AuthUser user = new AuthUser(userVo.getUsername(), userVo.getPassword(), grantedAuthorities);
        user.setId(userVo.getId());
        return user;
    }

}

3、JWTAuthorizationFilter

主要对用户进行认证工作，当登录时，获取用户名和密码，通过authenticationManager.authenticate，最终会调用UserDetailsServiceImpl来获取用户信息(在DaoAuthenticationProvider的retrieveUser中)，
然后在DaoAuthenticationProvider的additionalAuthenticationChecks中校验密码。

package com.blog.jwt;

import com.alibaba.fastjson.JSONObject;
import com.blog.domain.AuthUser;
import com.blog.common.core.constants.JWTConstants;
import com.blog.common.core.result.WrapMapper;
import com.nimbusds.jose.JOSEException;
import com.nimbusds.jose.JWSVerifier;
import com.nimbusds.jose.crypto.MACVerifier;
import com.nimbusds.jwt.SignedJWT;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.MediaType;
import org.springframework.security.authentication.AccountExpiredException;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.web.authentication.www.BasicAuthenticationFilter;
import org.springframework.util.StringUtils;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.text.ParseException;
import java.util.Date;

/**
 * @path：com.blog.jwt.JWTAuthorizationFilter.java
 * @className：JWTAuthorizationFilter.java
 * @description：授权
 * @author：tanyp
 * @dateTime：2020/11/19 13:19 
 * @editNote：
 */
@Slf4j
public class JWTAuthorizationFilter extends BasicAuthenticationFilter {

    public JWTAuthorizationFilter(AuthenticationManager authenticationManager) {
        super(authenticationManager);
    }

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain chain) throws IOException, ServletException {
        String token = request.getHeader(JWTConstants.TOKEN_HEADER);
        if (StringUtils.isEmpty(token) || !token.startsWith(JWTConstants.TOKEN_PREFIX)) {
            chain.doFilter(request, response);
            return;
        }

        try {
            Authentication authentication = getAuthentication(token);
            SecurityContextHolder.getContext().setAuthentication(authentication);
            onSuccessfulAuthentication(request, response, authentication);
            chain.doFilter(request, response);
        } catch (Exception e) {
            e.printStackTrace();
            onUnsuccessfulAuthentication(request, response, new AccountExpiredException(e.getMessage()));
        }
    }

    @Override
    protected void onSuccessfulAuthentication(HttpServletRequest request, HttpServletResponse response, Authentication authResult) throws IOException {
        log.info("=============Token 验证成功=================");
    }

    @Override
    protected void onUnsuccessfulAuthentication(HttpServletRequest request, HttpServletResponse response, AuthenticationException failed) throws IOException {
        log.error("================token校验失败=======================");
        response.setContentType(MediaType.APPLICATION_JSON_VALUE);
        response.setCharacterEncoding("UTF-8");
        response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
        response.getWriter().write(JSONObject.toJSONString(WrapMapper.error(HttpServletResponse.SC_UNAUTHORIZED, failed.getMessage())));
    }

    /**
     * @methodName：getAuthentication
     * @description：这里从token中获取用户信息并新建一个token
     * @author：tanyp
     * @dateTime：2020/11/19 13:37
     * @Params： [tokenHeader]
     * @Return： org.springframework.security.authentication.UsernamePasswordAuthenticationToken
     * @editNote：
     */
    private UsernamePasswordAuthenticationToken getAuthentication(String tokenHeader) throws ParseException, JOSEException {
        String token = tokenHeader.replace(JWTConstants.TOKEN_PREFIX, "");
        SignedJWT jwt = SignedJWT.parse(token);
        JWSVerifier verifier = new MACVerifier(JWTConstants.SECRET);

        // 校验是否有效
        if (!jwt.verify(verifier)) {
            throw new AccountExpiredException(JWTConstants.TOKEN_INVALID);
        }

        // 校验超时
        Date expirationTime = jwt.getJWTClaimsSet().getExpirationTime();
        if (new Date().after(expirationTime)) {
            throw new AccountExpiredException(JWTConstants.TOKEN_EXPIRE);
        }

        // 获取载体中的数据
        Object account = jwt.getJWTClaimsSet().getClaim("payload");
        if (account != null) {
            AuthUser user = JSONObject.parseObject(account.toString(), AuthUser.class);
            return new UsernamePasswordAuthenticationToken(user.getUsername(), null, user.getAuthorities());
        }
        return null;
    }

}

4.JWTAuthenticationFilter

在JWTAuthenticationFilter中，把权限信息等写入到了redis中。

只要后台权限变动的时候，根据key的规则清除redis数据即可， 然后在gateway中获取不到相应的权限， 那么会要求用户重新登录。

package com.blog.jwt;

import com.alibaba.fastjson.JSONObject;
import com.blog.common.core.constants.JWTConstants;
import com.blog.common.core.constants.RedisConstants;
import com.blog.common.core.enums.AuthEnum;
import com.blog.common.core.result.WrapMapper;
import com.blog.common.core.result.Wrapper;
import com.blog.common.core.utils.JWTUtiles;
import com.blog.common.core.utils.Md5Utils;
import com.blog.domain.AuthUser;
import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.http.MediaType;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.BadCredentialsException;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

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

/**
 * @path：com.blog.jwt.JWTAuthenticationFilter.java
 * @className：JWTAuthenticationFilter.java
 * @description：权限变动重新授权
 * @author：tanyp
 * @dateTime：2020/11/19 13:15 
 * @editNote：
 */
@Slf4j
public class JWTAuthenticationFilter extends UsernamePasswordAuthenticationFilter {

    private AuthenticationManager authenticationManager;

    private StringRedisTemplate redisTemplate;

    public JWTAuthenticationFilter(AuthenticationManager authenticationManager, StringRedisTemplate redisTemplate) {
        this.authenticationManager = authenticationManager;
        this.redisTemplate = redisTemplate;
    }

    @Override
    public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response) throws AuthenticationException {
        String username = request.getParameter("username");
        String password = request.getParameter("password");
        return authenticationManager.authenticate(new UsernamePasswordAuthenticationToken(username, password));
    }

    @SneakyThrows
    @Override
    protected void successfulAuthentication(HttpServletRequest request, HttpServletResponse response, FilterChain chain, Authentication authResult) throws IOException, ServletException {
        AuthUser user = (AuthUser) authResult.getPrincipal();

        // 生成token
        String payload = JSONObject.toJSONString(user);
        String jwtToken = JWTUtiles.createToken(payload);

        // 生成Key， 把权限放入到redis中
        String keyPrefix = RedisConstants.TOKEN_KEY_PREFIX + user.getId() + ":";
        String keySuffix = Md5Utils.getMD5(jwtToken.getBytes());
        String key = keyPrefix + keySuffix;
        String authKey = key + RedisConstants.AUTH_KEY;

        redisTemplate.opsForValue().set(key, jwtToken, JWTConstants.EXPIRE_TIME, TimeUnit.MILLISECONDS);
        redisTemplate.opsForValue().set(authKey, JSONObject.toJSONString(user.getAuthorities()), JWTConstants.EXPIRE_TIME, TimeUnit.SECONDS);

        response.setContentType(MediaType.APPLICATION_JSON_VALUE);
        response.setCharacterEncoding("UTF-8");
        response.getWriter().write(JSONObject.toJSONString(WrapMapper.success().result(jwtToken)));
    }

    @Override
    protected void unsuccessfulAuthentication(HttpServletRequest request, HttpServletResponse response, AuthenticationException failed) throws IOException, ServletException {
        log.error("========登录认证失败:", failed);
        Wrapper result = null;
        int status = AuthEnum.AUTH_NO_TOKEN.getKey();
        if (failed instanceof UsernameNotFoundException) {
            result = WrapMapper.error(AuthEnum.AUTH_NONEXISTENT.getKey(), AuthEnum.AUTH_NONEXISTENT.getValue());
        } else if (failed instanceof BadCredentialsException) {
            result = WrapMapper.error(AuthEnum.AUTH_NO_TOKEN.getKey(), AuthEnum.AUTH_NO_TOKEN.getValue());
        }
        response.setContentType(MediaType.APPLICATION_JSON_VALUE);
        response.setCharacterEncoding("UTF-8");
        response.setStatus(status);
        response.getWriter().write(JSONObject.toJSONString(result));
    }

}

注： 主要是生成JWT的token， 并且把权限信息放入redis。

登录直接调用Security框架的login方法即可

格式：

Authorization: Bearer eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJzdWJqZWN0IiwicGF5bG9hZCI6IntcImFjY291bnROb25FeHBpcmVkXCI6dHJ1ZSxcImFjY291bnROb25Mb2NrZWRcIjp0cnVlLFwiYXV0aG9yaXRpZXNcIjpbe1wiYXV0aG9yaXR5XCI6XCJcL21zcy11cG1zXC9vcmRlclwvbGlzdFwifSx7XCJhdXRob3JpdHlcIjpcIlwvbXNzLXVwbXNcL29yZGVyXC9kZXRhaWxcIn0se1wiYXV0aG9yaXR5XCI6XCJST0xFX2FkbWluXCJ9XSxcImNyZWRlbnRpYWxzTm9uRXhwaXJlZFwiOnRydWUsXCJlbmFibGVkXCI6dHJ1ZSxcImlkXCI6NDgsXCJwYXNzd29yZFwiOlwiJDJhJDEwJHZtcC56V1duWDNMRnhTczZJMDBpMGV1cmxIUjd5bWNmVVE1SHRYdzcxdzlRSi4ySlVmOFVhXCIsXCJ1c2VybmFtZVwiOlwiYWRtaW5cIn0iLCJleHAiOjE2MDYxMzA4MDd9.Wb-2UkAcVrj4KbQteT6D9RbktXgkPLI-tB5ymMkqsjI

二、网关校验（gateway模块）

网关的主要作用是对JWT和具体的URL进行校验，校验不通过则返回错误信息，主要通过AuthGlobalFilter来实现。

1、AuthGlobalFilter

package com.blog.filter;

import com.alibaba.fastjson.JSON;
import com.blog.common.core.constants.JWTConstants;
import com.blog.common.core.constants.RedisConstants;
import com.blog.common.core.enums.AuthEnum;
import com.blog.common.core.result.WrapMapper;
import com.blog.common.core.utils.JWTUtiles;
import com.blog.common.core.utils.Md5Utils;
import com.blog.config.ExclusionUrlConfig;
import com.blog.vo.Authority;
import com.blog.vo.UserVo;
import com.nimbusds.jwt.SignedJWT;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.util.AntPathMatcher;
import org.springframework.util.StringUtils;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.text.ParseException;
import java.util.List;

/**
 * @path：com.blog.filter.AuthGlobalFilter.java
 * @className：AuthGlobalFilter.java
 * @description：token过滤器
 * @author：tanyp
 * @dateTime：2020/11/10 18:06 
 * @editNote：
 */
@Slf4j
@Component
public class AuthGlobalFilter implements GlobalFilter, Ordered {

    @Autowired
    private ExclusionUrlConfig exclusionUrlConfig;

    AntPathMatcher antPathMatcher = new AntPathMatcher();

    @Autowired
    private StringRedisTemplate redisTemplate;

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        String headerToken = request.getHeaders().getFirst(JWTConstants.TOKEN_HEADER);
        log.info("headerToken:{}", headerToken);

        // 只要带上了token， 就需要判断Token是否有效
        if (!StringUtils.isEmpty(headerToken) && !JWTUtiles.verifierToken(headerToken)) {
            return getVoidMono(response, AuthEnum.AUTH_NO_TOKEN.getKey(), AuthEnum.AUTH_NO_TOKEN.getValue());
        }
        String path = request.getURI().getPath();
        log.info("request path:{}", path);

        // 判断是否是过滤的路径， 是的话就放行
        if (isExclusionUrl(path)) {
            return chain.filter(exchange);
        }

        // 判断请求的URL是否有权限
        boolean permission = hasPermission(headerToken, path);
        if (!permission) {
            return getVoidMono(response, AuthEnum.AUTH_NO_ACCESS.getKey(), AuthEnum.AUTH_NO_ACCESS.getValue());
        }
        return chain.filter(exchange);
    }

    @Override
    public int getOrder() {
        return 0;
    }

    private Mono<Void> getVoidMono(ServerHttpResponse response, int i, String msg) {
        response.getHeaders().setContentType(MediaType.APPLICATION_JSON);
        response.setStatusCode(HttpStatus.OK);
        byte[] bits = JSON.toJSONString(WrapMapper.error(i, msg)).getBytes();
        DataBuffer buffer = response.bufferFactory().wrap(bits);
        return response.writeWith(Mono.just(buffer));
    }

    private boolean isExclusionUrl(String path) {
        List<String> exclusions = exclusionUrlConfig.getUrl();
        if (exclusions.size() == 0) {
            return false;
        }
        return exclusions.stream().anyMatch(action -> antPathMatcher.match(action, path));
    }

    /**
     * @methodName：hasPermission
     * @description：判断请求的URL是否有权限
     * @author：tanyp
     * @dateTime：2020/11/24 9:38
     * @Params： [headerToken, path]
     * @Return： boolean
     * @editNote：
     */
    private boolean hasPermission(String headerToken, String path) {
        try {
            if (StringUtils.isEmpty(headerToken)) {
                return false;
            }

            SignedJWT jwt = JWTUtiles.getSignedJWT(headerToken);
            Object payload = jwt.getJWTClaimsSet().getClaim("payload");
            UserVo user = JSON.parseObject(payload.toString(), UserVo.class);
            // 生成Key， 把权限放入到redis中
            String keyPrefix = RedisConstants.TOKEN_KEY_PREFIX + user.getId() + ":";
            String token = headerToken.replace(JWTConstants.TOKEN_PREFIX, "");
            String keySuffix = Md5Utils.getMD5(token.getBytes());
            String key = keyPrefix + keySuffix;
            String authKey = key + RedisConstants.AUTH_KEY;

            String authStr = redisTemplate.opsForValue().get(authKey);
            if (StringUtils.isEmpty(authStr)) {
                return false;
            }

            List<Authority> authorities = JSON.parseArray(authStr, Authority.class);
            return authorities.stream().anyMatch(authority -> antPathMatcher.match(authority.getAuthority(), path));
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return false;
    }

}

2、白名单配置（ExclusionUrlConfig）

package com.blog.config;

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

import java.util.List;

/**
 * @path：com.blog.config.ExclusionUrlConfig.java
 * @className：ExclusionUrlConfig.java
 * @description：白名单配置
 * @author：tanyp
 * @dateTime：2020/11/19 14:01 
 * @editNote：
 */
@Data
@Component
@ConfigurationProperties(prefix = "exclusion")
public class ExclusionUrlConfig {

    private List<String> url;

}

配置信息

# 配置白名单路径
exclusion:
  url:
    - /auth/checkUser
    - /auth/login

三、相关工具类

1、JWT

package com.blog.common.core.utils;

import com.blog.common.core.constants.JWTConstants;
import com.nimbusds.jose.JOSEException;
import com.nimbusds.jose.JWSAlgorithm;
import com.nimbusds.jose.JWSHeader;
import com.nimbusds.jose.JWSVerifier;
import com.nimbusds.jose.crypto.MACSigner;
import com.nimbusds.jose.crypto.MACVerifier;
import com.nimbusds.jwt.JWTClaimsSet;
import com.nimbusds.jwt.SignedJWT;
import lombok.extern.slf4j.Slf4j;

import java.text.ParseException;
import java.util.Date;

/**
 * @path：com.blog.common.core.utils.JWTUtiles.java
 * @className：JWTUtiles.java
 * @description：JWT工具类
 * @author：tanyp
 * @dateTime：2020/11/24 9:32 
 * @editNote：
 */
@Slf4j
public class JWTUtiles {

    /**
     * @methodName：createToken
     * @description：创建token
     * @author：tanyp
     * @dateTime：2020/11/24 10:20
     * @Params： [user]
     * @Return： java.lang.String
     * @editNote：
     */
    public static String createToken(String payload) throws JOSEException {
        // 创建密钥
        MACSigner macSigner = new MACSigner(JWTConstants.SECRET);

        // payload
        JWTClaimsSet claimsSet = new JWTClaimsSet.Builder()
                .subject("subject")
                .claim("payload", payload)
                .expirationTime(new Date(System.currentTimeMillis() + JWTConstants.EXPIRE_TIME))
                .build();
        JWSHeader jwsHeader = new JWSHeader(JWSAlgorithm.HS256);

        // 创建签名的JWT
        SignedJWT signedJWT = new SignedJWT(jwsHeader, claimsSet);
        signedJWT.sign(macSigner);

        // 生成token
        String jwtToken = signedJWT.serialize();
        return jwtToken;
    }

    /**
     * @methodName：verifierToken
     * @description：验证token
     * @author：tanyp
     * @dateTime：2020/11/24 9:35
     * @Params： [headerToken]
     * @Return： boolean
     * @editNote：
     */
    public static boolean verifierToken(String headerToken) {
        try {
            SignedJWT jwt = getSignedJWT(headerToken);
            JWSVerifier verifier = new MACVerifier(JWTConstants.SECRET);
            // 校验是否有效
            if (!jwt.verify(verifier)) {
                log.error("token不合法，检测不过关");
                return false;
            }

            // 校验超时
            Date expirationTime = jwt.getJWTClaimsSet().getExpirationTime();
            if (new Date().after(expirationTime)) {
                log.error("token已经过期");
                return false;
            }
            // 获取载体中的数据
            return true;
        } catch (ParseException | JOSEException e) {
            log.error("token校验出错", e);
        }
        return false;
    }

    public static SignedJWT getSignedJWT(String headerToken) throws ParseException {
        String token = headerToken.replace(JWTConstants.TOKEN_PREFIX, "");
        log.info("token is {}", token);
        return SignedJWT.parse(token);
    }

}

2、MD5加密

package com.blog.common.core.utils;

import java.io.UnsupportedEncodingException;

/**
 * @path：com.blog.common.core.utils.Md5Utils.java
 * @className：Md5Utils.java
 * @description：MD5加密
 * @author：tanyp
 * @dateTime：2020/11/9 15:31
 * @editNote：
 */
public class Md5Utils {

    private static final int HEX_VALUE_COUNT = 16;

    public static String getMD5(byte[] bytes) {
        char[] hexDigits = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
        char[] str = new char[16 * 2];
        try {
            java.security.MessageDigest md = java.security.MessageDigest.getInstance("MD5");
            md.update(bytes);
            byte[] tmp = md.digest();
            int k = 0;
            for (int i = 0; i < HEX_VALUE_COUNT; i++) {
                byte byte0 = tmp[i];
                str[k++] = hexDigits[byte0 >>> 4 & 0xf];
                str[k++] = hexDigits[byte0 & 0xf];
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return new String(str);
    }

    public static String getMD5(String value, String encode) {
        String result = "";
        try {
            result = getMD5(value.getBytes(encode));
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return result;
    }

}
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原文地址：https://www.cnblogs.com/typ1805/p/14077843.html