springboot获取当前用户信息的三种方式

@Component
public class TokenInterceptor implements HandlerInterceptor {

    @Value("${token.key}")
    private String tokenKey;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
    
        // 获取请求头 拿到Token
        String token = request.getHeader("Token");
        String authToken = request.getHeader("authentication");

        if (StrUtil.isAllEmpty(token,authToken)){
           return responseHandler(response);
        }

        //  校验Token的合法性和有效性
        JWT jwt = JWTUtil.parseToken(StrUtil.isBlank(token) ? authToken : token);

        try {
            // 校验Token是否合法 校验Token是否过期
            if (!(jwt.setKey(tokenKey.getBytes()).verify() && jwt.validate(0))){
                return responseHandler(response);
            }
        } catch (Exception e) {
            // 抛出自定义异常 Token是非法的
            // throw new RuntimeException(e);
            return responseHandler(response);
        }

        // 把Token的信息解析出来放到ThreadLocal
        Long id = Convert.toLong(jwt.getPayload("id"));

        // 设置本地线程池中的用户ID
        TokenThreadLocal.set(id);
        
        // 放行
        return true;
    }

/**
 * 本地线程对象
 *
 * 存放用户ID
 */
public class TokenThreadLocal {

    /**
     * 创建一个ThreadLocal对象
     */
    private static final ThreadLocal<Long> THREAD_LOCAL= new ThreadLocal<>();

    /**
     * 添加一个数据
     * @param key
     */
    public static void set(Long key){
        THREAD_LOCAL.set(key);
    }

    /**
     * 获取一个数据
     * @return
     */
    public static Long get(){
        return THREAD_LOCAL.get();
    }

    /**
     * 删除一个数据
     */
    public static void remove(){
        THREAD_LOCAL.remove();
    }
}

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * 登录用户
 * @author 
 */
@Target(value = ElementType.PARAMETER)
@Retention(RetentionPolicy.RUNTIME)
public @interface LoginInfo {
}

import org.decent.modules.integral.resolver.LoginUserArgumentResolver;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import javax.annotation.Resource;
import java.util.List;

/**
 * web设置
 * @author
 */
@Configuration
public class WebConfig implements WebMvcConfigurer {

    @Resource
    private LoginUserArgumentResolver loginUserArgumentResolver;

    @Override
    public void addArgumentResolvers(List<HandlerMethodArgumentResolver> resolvers) {
        resolvers.add(loginUserArgumentResolver);
    }
}

import org.apache.shiro.SecurityUtils;
import org.decent.modules.integral.annotation.LoginInfo;
import org.springframework.core.MethodParameter;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.support.WebDataBinderFactory;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.method.support.ModelAndViewContainer;

/**
 * 登录解析实现
 *
 * @author
 */
@Component
public class LoginUserArgumentResolver implements HandlerMethodArgumentResolver {
    @Override
    public boolean supportsParameter(MethodParameter methodParameter) {
        return methodParameter.hasParameterAnnotation(LoginInfo.class);
    }

    @Override
    public Object resolveArgument(MethodParameter methodParameter, ModelAndViewContainer modelAndViewContainer, NativeWebRequest nativeWebRequest, WebDataBinderFactory webDataBinderFactory) throws Exception {
        return SecurityUtils.getSubject().getPrincipal();
    }
}

import lombok.Data;

/**
 * 在线用户信息
 */
@Data
public class LoginUser {

    /**
     * 登录人id
     */
    private String id;

    /**
     * 登录人账号
     */
    private String username;

    /**
     * 登录人名字
     */
    private String realname;
}

	@PostMapping(value = "/add")
	public Result<?> add(@LoginInfo LoginUser loginUser) {
        ......
	}

    @PostMapping("/login")
    public Result<?> counterLogin(@RequestBody LoginBody LoginUser){
        // 登录
        LoginUser userInfo = sysLoginService.login(LoginUser.getUsername(), LoginUser.getPassword(),LoginUser.getCounterType());
        
        // 创建Token并返回
        return Result.success(tokenService.createToken(userInfo));
    }

     @Autowired
    private RedisService redisService;

	// 定义有效时间，为720 * 60 秒，即12小时
    private final static long EXPIRE_TIME = 720 * 60;

	/**
     * 创建令牌
     */
    public Map<String, Object> createToken(LoginUser loginUser){
        // 生成token
        String token = IdUtils.fastUUID();
        loginUser.setToken(token);
        loginUser.setUserid(loginUser.getSysUser().getUserId());
        loginUser.setUsername(loginUser.getSysUser().getUserName());

        // 保存用户token
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("token", token);
        map.put("loginUser",loginUser);

		// 将该用户的信息存入到Redis中
        redisService.setCacheObject(token, loginUser, EXPIRE_TIME, TimeUnit.SECONDS);
        
        return map;
    }

/**
 * spring redis 工具类
 **/
@Component
public class RedisService{

    @Autowired
    public RedisTemplate redisTemplate;
    
    /**
     * 缓存基本的对象
     */
    public <T> void setCacheObject(final String key, final T value, final Long timeout, final TimeUnit timeUnit){
        redisTemplate.opsForValue().set(key, value, timeout, timeUnit);
    }

    /**
     * 获得缓存的基本对象
     */
    public <T> T getCacheObject(final String key){
        ValueOperations<String, T> operation = redisTemplate.opsForValue();
        return operation.get(key);
    }
}

    /**
     * 根据用户Token获取用户身份信息
     *
     * @return 用户信息
     */
    public LoginUser getLoginUser(String token){
        if (StringUtils.isNotEmpty(token)){
            String userKey = getTokenKey(token);
            LoginUser user = redisService.getCacheObject(userKey);
            return user;
        }
        return null;
    }