注册中心网关配置

spring:
  cloud:
    gateway:
      globalcors:
        add-to-simple-url-handler-mapping: true
        corsConfigurations:
          '[/**]':
            allowedHeaders: "*"
            allowedOrigins: "*"
            allowedMethods:
              - GET
              - POST
              - DELETE
              - PUT
              - OPTION
      routes:
        # 平台管理
        - id: user
          uri: lb://leadnews-user
          predicates:
            - Path=/user/**
          filters:
            - StripPrefix= 1

gateway网关校验token

package com.heima.app.gateway.filter;

import com.alibaba.cloud.commons.lang.StringUtils;
import com.heima.app.gateway.utils.AppJwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

@Component
@Slf4j
public class AuthorizeFilter implements Ordered, GlobalFilter {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        //1.拿到request和response对象
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();

        //2.判断是否登录微服务
        boolean contains = request.getURI().getPath().contains("/login");

        if (contains){
            //放行
            return chain.filter(exchange);
        }

        //3.获取token
        String token = request.getHeaders().getFirst("token");

        //4.判断token是否存在

        //不能为null，""  和"     ";有一个就是true否则false
        if (StringUtils.isBlank(token)){
            //为空  返回校验失败401
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            //结束当前请求，不放行
          return   response.setComplete();

        }




        //5.判断token是否有效
        try {
            Claims claimsBody = AppJwtUtil.getClaimsBody(token);

            int result = AppJwtUtil.verifyToken(claimsBody);
            //-1：有效，0：有效，1：过期，2：过期

            if (result==1||result==2){
                //过期
                response.setStatusCode(HttpStatus.UNAUTHORIZED);
                return response.setComplete();
            }
        } catch (Exception e) {
            //解析token失败
            e.printStackTrace();
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }


        //6.放行，解析成功了，验证成功,放行
        return chain.filter(exchange);
    }

    /**
     * 优先级设置，值越小优先级越高
     * @return
     */
    @Override
    public int getOrder() {
        return 0;
    }
}

导入的jwt依赖

        <dependency>
            <groupId>io.jsonwebtoken</groupId>
            <artifactId>jjwt</artifactId>
            <version>0.9.1</version>
        </dependency>

token封装工具类

package com.heima.utils.common;

import io.jsonwebtoken.*;

import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.util.*;

public class AppJwtUtil {

    // TOKEN的有效期一天（S）
    private static final int TOKEN_TIME_OUT = 3_600;
    // 加密KEY
    private static final String TOKEN_ENCRY_KEY = "MDk4ZjZiY2Q0NjIxZDM3M2NhZGU0ZTgzMjYyN2I0ZjY";
    // 最小刷新间隔(S)
    private static final int REFRESH_TIME = 300;

    // 生产ID
    public static String getToken(Long id){
        Map<String, Object> claimMaps = new HashMap<>();
        claimMaps.put("id",id);
        long currentTime = System.currentTimeMillis();
        return Jwts.builder()
                .setId(UUID.randomUUID().toString())
                .setIssuedAt(new Date(currentTime))  //签发时间
                .setSubject("system")  //说明
                .setIssuer("heima") //签发者信息
                .setAudience("app")  //接收用户
                .compressWith(CompressionCodecs.GZIP)  //数据压缩方式
                .signWith(SignatureAlgorithm.HS512, generalKey()) //加密方式
                .setExpiration(new Date(currentTime + TOKEN_TIME_OUT * 1000))  //过期时间戳
                .addClaims(claimMaps) //cla信息
                .compact();
    }

    /**
     * 获取token中的claims信息
     *
     * @param token
     * @return
     */
    private static Jws<Claims> getJws(String token) {
            return Jwts.parser()
                    .setSigningKey(generalKey())
                    .parseClaimsJws(token);
    }

    /**
     * 获取payload body信息
     *
     * @param token
     * @return
     */
    public static Claims getClaimsBody(String token) {
        try {
            return getJws(token).getBody();
        }catch (ExpiredJwtException e){
            return null;
        }
    }

    /**
     * 获取hearder body信息
     *
     * @param token
     * @return
     */
    public static JwsHeader getHeaderBody(String token) {
        return getJws(token).getHeader();
    }

    /**
     * 是否过期
     *
     * @param claims
     * @return -1：有效，0：有效，1：过期，2：过期
     */
    public static int verifyToken(Claims claims) {
        if(claims==null){
            return 1;
        }
        try {
            claims.getExpiration()
                    .before(new Date());
            // 需要自动刷新TOKEN
            if((claims.getExpiration().getTime()-System.currentTimeMillis())>REFRESH_TIME*1000){
                return -1;
            }else {
                return 0;
            }
        } catch (ExpiredJwtException ex) {
            return 1;
        }catch (Exception e){
            return 2;
        }
    }

    /**
     * 由字符串生成加密key
     *
     * @return
     */
    public static SecretKey generalKey() {
        byte[] encodedKey = Base64.getEncoder().encode(TOKEN_ENCRY_KEY.getBytes());
        SecretKey key = new SecretKeySpec(encodedKey, 0, encodedKey.length, "AES");
        return key;
    }

    public static void main(String[] args) {
       /* Map map = new HashMap();
        map.put("id","11");*/
        System.out.println(AppJwtUtil.getToken(1102L));
        Jws<Claims> jws = AppJwtUtil.getJws("eyJhbGciOiJIUzUxMiIsInppcCI6IkdaSVAifQ.H4sIAAAAAAAAADWLQQqEMAwA_5KzhURNt_qb1KZYQSi0wi6Lf9942NsMw3zh6AVW2DYmDGl2WabkZgreCaM6VXzhFBfJMcMARTqsxIG9Z888QLui3e3Tup5Pb81013KKmVzJTGo11nf9n8v4nMUaEY73DzTabjmDAAAA.4SuqQ42IGqCgBai6qd4RaVpVxTlZIWC826QA9kLvt9d-yVUw82gU47HDaSfOzgAcloZedYNNpUcd18Ne8vvjQA");
        Claims claims = jws.getBody();
        System.out.println(claims.get("id"));

    }

}