SpringBoot项目使用SpringSecurity和JWT实现登录功能

使用SpringSecurity,Redis实现登录功能

首先，思路如下：

①自定义登录接口

调用ProviderManager的方法进行认证如果认证通过生成jwt

把用户信息存入redis中

②自定义UserDetailsService

在这个实现类中去查询数据库

注意配置passwordEncoder为BCryptPasswordEncoder

校验：

①定义Jwt认证过滤器

获取token

解析token获取其中的userid

从redis中获取用户信息

存入SecurityContextHolder

准备工作：

先在application.yml文件中添加redis的配置

spring:
  redis:
    host: localhost
    port: 6379
    password: 123456
    database: 12

①添加依赖

     <!--redis依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
        <!--fastjson依赖-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.33</version>
        </dependency>
        <!--jwt依赖-->
        <dependency>
            <groupId>io.jsonwebtoken</groupId>
            <artifactId>jjwt</artifactId>
            <version>0.9.0</version>
        </dependency>
    <!--SpringSecurity启动器-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>

②工具类和相关配置类

在config包下放入

（1）FastJson实现Redis的序列化：

package com.gjh.config;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.type.TypeFactory;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.SerializationException;
import com.alibaba.fastjson.parser.ParserConfig;
import java.nio.charset.Charset;

/**
 * Redis使用FastJson序列化
 *
 * @author sg
 */
public class FastJsonRedisSerializer<T> implements RedisSerializer<T>
{

    public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");

    private Class<T> clazz;

    static
    {
        ParserConfig.getGlobalInstance().setAutoTypeSupport(true);
    }

    public FastJsonRedisSerializer(Class<T> clazz)
    {
        super();
        this.clazz = clazz;
    }

    @Override
    public byte[] serialize(T t) throws SerializationException
    {
        if (t == null)
        {
            return new byte[0];
        }
        return JSON.toJSONString(t, SerializerFeature.WriteClassName).getBytes(DEFAULT_CHARSET);
    }

    @Override
    public T deserialize(byte[] bytes) throws SerializationException
    {
        if (bytes == null || bytes.length <= 0)
        {
            return null;
        }
        String str = new String(bytes, DEFAULT_CHARSET);

        return JSON.parseObject(str, clazz);
    }


    protected JavaType getJavaType(Class<?> clazz)
    {
        return TypeFactory.defaultInstance().constructType(clazz);
    }
}

（2）. Redis配置类

package com.gjh.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.StringRedisSerializer;

@Configuration
public class RedisConfig {

    @Bean
    @SuppressWarnings(value = { "unchecked", "rawtypes" })
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory connectionFactory)
    {
        RedisTemplate<Object, Object> template = new RedisTemplate<>();
        template.setConnectionFactory(connectionFactory);

        FastJsonRedisSerializer serializer = new FastJsonRedisSerializer(Object.class);

        // 使用StringRedisSerializer来序列化和反序列化redis的key值
        template.setKeySerializer(new StringRedisSerializer());
        template.setValueSerializer(serializer);

        // Hash的key也采用StringRedisSerializer的序列化方式
        template.setHashKeySerializer(new StringRedisSerializer());
        template.setHashValueSerializer(serializer);

        template.afterPropertiesSet();
        return template;
    }
}

在utils包下放入：

（1）.JWTUtil类：

package com.gjh.utils;

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

import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.util.Base64;
import java.util.Date;
import java.util.UUID;

/**
 * JWT工具类
 */
public class JwtUtil {

    //有效期为
    public static final Long JWT_TTL = 2*24*60 * 60 *1000L;// 60 * 60 *1000  两个小时
    //设置秘钥明文
    public static final String JWT_KEY = "jh";

    public static String getUUID(){
        String token = UUID.randomUUID().toString().replaceAll("-", "");
        return token;
    }
    
    /**
     * 生成jtw
     * @param subject token中要存放的数据（json格式）
     * @return
     */
    public static String createJWT(String subject) {
        JwtBuilder builder = getJwtBuilder(subject, null, getUUID());// 设置过期时间
        return builder.compact();
    }

    /**
     * 生成jtw
     * @param subject token中要存放的数据（json格式）
     * @param ttlMillis token超时时间
     * @return
     */
    public static String createJWT(String subject, Long ttlMillis) {
        JwtBuilder builder = getJwtBuilder(subject, ttlMillis, getUUID());// 设置过期时间
        return builder.compact();
    }

    private static JwtBuilder getJwtBuilder(String subject, Long ttlMillis, String uuid) {
        SignatureAlgorithm signatureAlgorithm = SignatureAlgorithm.HS256;
        SecretKey secretKey = generalKey();
        long nowMillis = System.currentTimeMillis();
        Date now = new Date(nowMillis);
        if(ttlMillis==null){
            ttlMillis=JwtUtil.JWT_TTL;
        }
        long expMillis = nowMillis + ttlMillis;
        Date expDate = new Date(expMillis);
        return Jwts.builder()
                .setId(uuid)              //唯一的ID
                .setSubject(subject)   // 主题  可以是JSON数据
                .setIssuer("gjh")     // 签发者
                .setIssuedAt(now)      // 签发时间
                .signWith(signatureAlgorithm, secretKey) //使用HS256对称加密算法签名, 第二个参数为秘钥
                .setExpiration(expDate);
    }

    /**
     * 创建token
     * @param id
     * @param subject
     * @param ttlMillis
     * @return
     */
    public static String createJWT(String id, String subject, Long ttlMillis) {
        JwtBuilder builder = getJwtBuilder(subject, ttlMillis, id);// 设置过期时间
        return builder.compact();
    }

    public static void main(String[] args) throws Exception {
        String token = "eyJhbGciOiJIUzI1NiJ9.eyJqdGkiOiJjYWM2ZDVhZi1mNjVlLTQ0MDAtYjcxMi0zYWEwOGIyOTIwYjQiLCJzdWIiOiJzZyIsImlzcyI6InNnIiwiaWF0IjoxNjM4MTA2NzEyLCJleHAiOjE2MzgxMTAzMTJ9.JVsSbkP94wuczb4QryQbAke3ysBDIL5ou8fWsbt_ebg";
        Claims claims = parseJWT(token);
        System.out.println(claims);
    }

    /**
     * 生成加密后的秘钥 secretKey
     * @return
     */
    public static SecretKey generalKey() {
        byte[] encodedKey = Base64.getDecoder().decode(JwtUtil.JWT_KEY);
        SecretKey key = new SecretKeySpec(encodedKey, 0, encodedKey.length, "AES");
        return key;
    }
    
    /**
     * 解析
     *
     * @param jwt
     * @return
     * @throws Exception
     */
    public static Claims parseJWT(String jwt) throws Exception {
        SecretKey secretKey = generalKey();
        return Jwts.parser()
                .setSigningKey(secretKey)
                .parseClaimsJws(jwt)
                .getBody();
    }


}

（2）.WebUtils类

package com.gjh.utils;

import org.springframework.web.context.request.RequestContextHolder;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

public class WebUtils
{
    /**
     * 将字符串渲染到客户端
     *
     * @param response 渲染对象
     * @param string 待渲染的字符串
     * @return null
     */
    public static void renderString(HttpServletResponse response, String string) {
        try
        {
            response.setStatus(200);
            response.setContentType("application/json");
            response.setCharacterEncoding("utf-8");
            response.getWriter().print(string);
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
    }


    public static void setDownLoadHeader(String filename, ServletContext context, HttpServletResponse response) throws UnsupportedEncodingException {
        String mimeType = context.getMimeType(filename);//获取文件的mime类型
        response.setHeader("content-type",mimeType);
        String fname= URLEncoder.encode(filename,"UTF-8");
        response.setHeader("Content-disposition","attachment; filename="+fname);

//        response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
//        response.setCharacterEncoding("utf-8");
    }
}

（3）.RedisCache类：

package com.gjh.utils;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.BoundSetOperations;
import org.springframework.data.redis.core.HashOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Component;

import java.util.*;
import java.util.concurrent.TimeUnit;

@SuppressWarnings(value = { "unchecked", "rawtypes" })
@Component
public class RedisCache
{
    @Autowired
    public RedisTemplate redisTemplate;

    /**
     * 缓存基本的对象，Integer、String、实体类等
     *
     * @param key 缓存的键值
     * @param value 缓存的值
     */
    public <T> void setCacheObject(final String key, final T value)
    {
        redisTemplate.opsForValue().set(key, value);
    }

    /**
     * 缓存基本的对象，Integer、String、实体类等
     *
     * @param key 缓存的键值
     * @param value 缓存的值
     * @param timeout 时间
     * @param timeUnit 时间颗粒度
     */
    public <T> void setCacheObject(final String key, final T value, final Integer timeout, final TimeUnit timeUnit)
    {
        redisTemplate.opsForValue().set(key, value, timeout, timeUnit);
    }

    /**
     * 设置有效时间
     *
     * @param key Redis键
     * @param timeout 超时时间
     * @return true=设置成功；false=设置失败
     */
    public boolean expire(final String key, final long timeout)
    {
        return expire(key, timeout, TimeUnit.SECONDS);
    }

    /**
     * 设置有效时间
     *
     * @param key Redis键
     * @param timeout 超时时间
     * @param unit 时间单位
     * @return true=设置成功；false=设置失败
     */
    public boolean expire(final String key, final long timeout, final TimeUnit unit)
    {
        return redisTemplate.expire(key, timeout, unit);
    }

    /**
     * 获得缓存的基本对象。
     *
     * @param key 缓存键值
     * @return 缓存键值对应的数据
     */
    public <T> T getCacheObject(final String key)
    {
        ValueOperations<String, T> operation = redisTemplate.opsForValue();
        return operation.get(key);
    }

    /**
     * 删除单个对象
     *
     * @param key
     */
    public boolean deleteObject(final String key)
    {
        return redisTemplate.delete(key);
    }

    /**
     * 删除集合对象
     *
     * @param collection 多个对象
     * @return
     */
    public long deleteObject(final Collection collection)
    {
        return redisTemplate.delete(collection);
    }

    /**
     * 缓存List数据
     *
     * @param key 缓存的键值
     * @param dataList 待缓存的List数据
     * @return 缓存的对象
     */
    public <T> long setCacheList(final String key, final List<T> dataList)
    {
        Long count = redisTemplate.opsForList().rightPushAll(key, dataList);
        return count == null ? 0 : count;
    }

    /**
     * 获得缓存的list对象
     *
     * @param key 缓存的键值
     * @return 缓存键值对应的数据
     */
    public <T> List<T> getCacheList(final String key)
    {
        return redisTemplate.opsForList().range(key, 0, -1);
    }

    /**
     * 缓存Set
     *
     * @param key 缓存键值
     * @param dataSet 缓存的数据
     * @return 缓存数据的对象
     */
    public <T> BoundSetOperations<String, T> setCacheSet(final String key, final Set<T> dataSet)
    {
        BoundSetOperations<String, T> setOperation = redisTemplate.boundSetOps(key);
        Iterator<T> it = dataSet.iterator();
        while (it.hasNext())
        {
            setOperation.add(it.next());
        }
        return setOperation;
    }

    /**
     * 获得缓存的set
     *
     * @param key
     * @return
     */
    public <T> Set<T> getCacheSet(final String key)
    {
        return redisTemplate.opsForSet().members(key);
    }

    /**
     * 缓存Map
     *
     * @param key
     * @param dataMap
     */
    public <T> void setCacheMap(final String key, final Map<String, T> dataMap)
    {
        if (dataMap != null) {
            redisTemplate.opsForHash().putAll(key, dataMap);
        }
    }

    /**
     * 获得缓存的Map
     *
     * @param key
     * @return
     */
    public <T> Map<String, T> getCacheMap(final String key)
    {
        return redisTemplate.opsForHash().entries(key);
    }

    /**
     * 往Hash中存入数据
     *
     * @param key Redis键
     * @param hKey Hash键
     * @param value 值
     */
    public <T> void setCacheMapValue(final String key, final String hKey, final T value)
    {
        redisTemplate.opsForHash().put(key, hKey, value);
    }

    /**
     * 获取Hash中的数据
     *
     * @param key Redis键
     * @param hKey Hash键
     * @return Hash中的对象
     */
    public <T> T getCacheMapValue(final String key, final String hKey)
    {
        HashOperations<String, String, T> opsForHash = redisTemplate.opsForHash();
        return opsForHash.get(key, hKey);
    }

    /**
     * 删除Hash中的数据
     *
     * @param key
     * @param hkey
     */
    public void delCacheMapValue(final String key, final String hkey)
    {
        HashOperations hashOperations = redisTemplate.opsForHash();
        hashOperations.delete(key, hkey);
    }

    /**
     * 获取多个Hash中的数据
     *
     * @param key Redis键
     * @param hKeys Hash键集合
     * @return Hash对象集合
     */
    public <T> List<T> getMultiCacheMapValue(final String key, final Collection<Object> hKeys)
    {
        return redisTemplate.opsForHash().multiGet(key, hKeys);
    }

    /**
     * 获得缓存的基本对象列表
     *
     * @param pattern 字符串前缀
     * @return 对象列表
     */
    public Collection<String> keys(final String pattern)
    {
        return redisTemplate.keys(pattern);
    }
}

正式开始：

然后再写一个SecurityConfig在本模块的config包下：

package com.gjh.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationManager;
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.crypto.password.PasswordEncoder;

@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Bean
    public PasswordEncoder passwordEncoder(){
        //因为本项目数据库中密码使用BcryptPasswordEncoder加密的，所以这个地方也一样
        return new BCryptPasswordEncoder();
    }
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                //关闭csrf
                .csrf().disable()
                //不通过Session获取SecurityContext
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                .and()
                .authorizeRequests()
                // 对于登录接口 允许匿名访问
                .antMatchers("/login").anonymous()
                // 除上面外的所有请求全部不需要认证即可访问
                .anyRequest().permitAll();


        http.logout().disable();
        //允许跨域
        http.cors();
    }
    @Override
    @Bean
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }
}

然后创建LoginController,LoginService,LoginserviceImpl:

package com.gjh.controller;

import com.gjh.domain.entity.ResponseResult;
import com.gjh.domain.entity.User;
import com.gjh.service.BlogLoginService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class BlogLoginController {
    @Autowired
    private BlogLoginService blogLoginService;


    /**
     * blog登录功能
     * @param user
     * @return
     */
    @PostMapping("/login")
    public ResponseResult login(@RequestBody User user){
        return blogLoginService.login(user);
    }
}

package com.gjh.service;

import com.baomidou.mybatisplus.extension.service.IService;
import com.gjh.domain.entity.ResponseResult;
import com.gjh.domain.entity.User;

public interface BlogLoginService  extends IService<User> {
    /**
     * 前台登录
     * @param user
     * @return
     */
    ResponseResult login(User user);
}

package com.gjh.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.gjh.domain.ResponseResult;
import com.gjh.domain.entity.LoginUser;
import com.gjh.domain.entity.User;
import com.gjh.domain.vo.BlogUserLoginVo;
import com.gjh.domain.vo.UserInfoVo;
import com.gjh.mapper.BlogLoginMapper;
import com.gjh.service.BlogLoginService;
import com.gjh.utils.BeanCopyUtils;
import com.gjh.utils.JwtUtil;
import com.gjh.utils.RedisCache;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.Objects;

@Service
public class BlogLoginServiceImpl extends ServiceImpl<BlogLoginMapper, User> implements BlogLoginService {
    @Resource
    private AuthenticationManager authenticationManager;
    @Resource
    private RedisCache redisCache;

    /**
     * blog登录
     * @param user
     * @return
     */
    public ResponseResult login(User user) {
        UsernamePasswordAuthenticationToken authenticationToken =
                new UsernamePasswordAuthenticationToken(user.getUserName(),user.getPassword());

        Authentication authenticate = authenticationManager.authenticate(authenticationToken);

        //判断是否认证通过
        if(Objects.isNull(authenticate)){
            throw new RuntimeException("用户名或密码错误!");
        }
        //获取userId,生成token
        LoginUser loginUser = (LoginUser) authenticate.getPrincipal();
        Long userId = loginUser.getUser().getId();
        String jwt = JwtUtil.createJWT(userId.toString());

        //把用户信息存入redis
        redisCache.setCacheObject("bloglogin:" + userId,loginUser);

        //把token和userInfo封装，返回
        UserInfoVo userInfoVo = BeanCopyUtils.copyBean(loginUser.getUser(), UserInfoVo.class);
        BlogUserLoginVo blogUserLoginVo = new BlogUserLoginVo(jwt,userInfoVo);

        return ResponseResult.okResult(blogUserLoginVo);
    }
}

创建一个LoginUser类实现UserDetails这个接口：

package com.gjh.domain.entity;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;

import java.util.Collection;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class LoginUser implements UserDetails {

    private User user;
    @Override
    public Collection<? extends GrantedAuthority> getAuthorities() {
        return null;
    }

    @Override
    public String getPassword() {
        return user.getPassword();
    }

    @Override
    public String getUsername() {
        return user.getUserName();
    }

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

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

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

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

并且创建一个UserDetailServiceImpl类：

package com.gjh.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.gjh.domain.entity.LoginUser;
import com.gjh.domain.entity.User;
import com.gjh.mapper.UserMapper;
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 javax.annotation.Resource;
import java.util.Objects;

@Service
public class UserDetailServiceImpl implements UserDetailsService {
    @Resource
    private UserMapper userMapper;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        //根据用户名查询用户信息
        LambdaQueryWrapper<User> queryWrapper = new LambdaQueryWrapper<User>();
        queryWrapper.eq(User::getUserName,username);

        User user = userMapper.selectOne(queryWrapper);
        //判断是否查到用户，如果没有查到则抛出异常
        if(Objects.isNull(user)){
            throw new RuntimeException("用户不存在");
        }
        //返回用户信息
        //TODO 查询权限信息封装

        return new LoginUser(user);
    }
}

其中用到的BlogUserLoginVo：

package com.gjh.domain.vo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class BlogUserLoginVo {
    private String token;
    private UserInfoVo userInfoVo;
}

还有UserInfoVo：

package com.gjh.domain.vo;

import lombok.Data;
import lombok.experimental.Accessors;

@Data
@Accessors(chain = true)
public class UserInfoVo {
    /**
     * 主键
     */
    private Long id;

    /**
     * 昵称
     */
    private String nickName;

    /**
     * 头像
     */
    private String avatar;

    private String sex;

    private String email;


}

重启测试：

然后就可以启动了，我们使用postman进行测试

报错500，查看控制台，有如下报错：

原因：这有可能是因为SpringBoot项目结合jwt进行登录时出现的问题，因为jdk版本太高导致的。

于是我们可以降低jdk版本，或者直接使用第二种方法：

添加依赖：

       <dependency>
            <groupId>javax.xml.bind</groupId>
            <artifactId>jaxb-api</artifactId>
            <version>2.3.1</version>
        </dependency>

然后重启服务，在进行测试：

成功了！！

tips:如果有其他错误，记得查看是否加了各种注解，比如@configuration @service这些。

使用JWT进行校验功能：

在freamwork模块下创建一个filter包，包下定义一个JwtAuthenticationTokenFilter类：

package com.gjh.filter;

import com.alibaba.fastjson.JSON;
import com.gjh.domain.ResponseResult;
import com.gjh.domain.entity.LoginUser;
import com.gjh.enums.AppHttpCodeEnum;
import com.gjh.utils.JwtUtil;
import com.gjh.utils.RedisCache;
import com.gjh.utils.WebUtils;
import io.jsonwebtoken.Claims;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import org.springframework.web.filter.OncePerRequestFilter;
import javax.annotation.Resource;
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 {
    @Resource
    private RedisCache redisCache;

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
        //获取请求头中的token
        String token = request.getHeader("token");
        if(!StringUtils.hasText(token)){
            //没有token，说明该接口不需要登录，直接放行
            filterChain.doFilter(request,response);
            return;
        }
        //解析获取UserId
        Claims claims = null;
        try {
            claims = JwtUtil.parseJWT(token);
        } catch (Exception e) {
            e.printStackTrace();
            //token超时,token非法
            //响应告诉前端，需要重新登录
            ResponseResult result = ResponseResult.errorResult(AppHttpCodeEnum.NEED_LOGIN);

            WebUtils.renderString(response, JSON.toJSONString(request));
            return;
        }
        String userId = claims.getSubject();
        //从redis中获取用户信息
        LoginUser loginUser = redisCache.getCacheObject("bloglogin:" + userId);
        //存入SecurityContextHolder
        UsernamePasswordAuthenticationToken authenticationToken =
                new UsernamePasswordAuthenticationToken(loginUser,null,null);
        SecurityContextHolder.getContext().setAuthentication(authenticationToken);

        filterChain.doFilter(request,response);
    }
}

然后修改SecurityConfig，把JWT的过滤器放进入，我们在这先把/link/getAllLink这个请求设置成要登录才可以访问:

package com.gjh.config;

import com.gjh.filter.JwtAuthenticationTokenFilter;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationManager;
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.crypto.password.PasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

import javax.annotation.Resource;

@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    @Resource
    private JwtAuthenticationTokenFilter jwtAuthenticationTokenFilter;

    @Bean
    public PasswordEncoder passwordEncoder(){
        return new BCryptPasswordEncoder();
    }
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                //关闭csrf
                .csrf().disable()
                //不通过Session获取SecurityContext
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                .and()
                .authorizeRequests()
                // 对于登录接口 允许匿名访问
                .antMatchers("/login").anonymous()
                .antMatchers("/link/getAllLink").authenticated()
                // 除上面外的所有请求全部不需要认证即可访问
                .anyRequest().permitAll();


        http.logout().disable();

        http.addFilterBefore(jwtAuthenticationTokenFilter, UsernamePasswordAuthenticationFilter.class);
        //允许跨域
        http.cors();
    }
    @Override
    @Bean
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }
}

重启进行测试：

使用postman发送请求： http://localhost:7777/link/getAllLink

先不带token

报了403,被拒绝了请求。

然后在Header里面携带token:

可以看到查询成功！

认证授权的失败处理

目前我们的项目在认证出错或者权限不足的时候响应回来的Json是Security的异常处理结果。但是这个响应的格式肯定是不符合我们项目的接口规范的。所以需要自定义异常处理。

AuthenticationEntryPoint 认证失败处理器

AccessDeniedHandler 授权失败处理器

首先，我们在framework项目中创建一个handle/security包，在security包下创建上面两个实现类：

package com.gjh.handler.security;

import com.alibaba.fastjson.JSON;
import com.gjh.domain.ResponseResult;
import com.gjh.enums.AppHttpCodeEnum;
import com.gjh.utils.WebUtils;
import org.springframework.security.authentication.BadCredentialsException;
import org.springframework.security.authentication.InsufficientAuthenticationException;
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 AuthenticationEntryPointImpl implements AuthenticationEntryPoint {
    @Override
    public void commence(HttpServletRequest request, HttpServletResponse response, AuthenticationException authException) throws IOException, ServletException {
        authException.printStackTrace();
        //InsufficientAuthenticationException
        //BadCredentialsException
        ResponseResult result = null;
        if(authException instanceof BadCredentialsException){
            result = ResponseResult.errorResult(AppHttpCodeEnum.LOGIN_ERROR.getCode(),authException.getMessage());
        }else if(authException instanceof InsufficientAuthenticationException){
            result = ResponseResult.errorResult(AppHttpCodeEnum.NEED_LOGIN);
        }else{
            result = ResponseResult.errorResult(AppHttpCodeEnum.SYSTEM_ERROR.getCode(),"认证或授权失败");
        }
        //响应给前端
        WebUtils.renderString(response, JSON.toJSONString(result));
    }
}

package com.gjh.handler.security;

import com.alibaba.fastjson.JSON;
import com.gjh.domain.ResponseResult;
import com.gjh.enums.AppHttpCodeEnum;
import com.gjh.utils.WebUtils;
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 AccessDeniedHandlerImpl implements AccessDeniedHandler {

    @Override
    public void handle(HttpServletRequest request, HttpServletResponse response, AccessDeniedException accessDeniedException) throws IOException, ServletException {
        accessDeniedException.printStackTrace();
        ResponseResult result = ResponseResult.errorResult(AppHttpCodeEnum.NO_OPERATOR_AUTH);
        //响应给前端
        WebUtils.renderString(response, JSON.toJSONString(result));
    }
}

然后再去SecurityConfig的configure方法里面进行配置异常处理器：

//配置异常处理器
        http.exceptionHandling()
                        .authenticationEntryPoint(authenticationEntryPoint)
                        .accessDeniedHandler(accessDeniedHandler);