这篇文章主要介绍了gateway和jwt网关认证实现过程解析,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

思路： 全局过滤器对所有的请求拦截（生成token有效期30分钟，放入redis设置有效期3天。3天之类可以通过刷新接口自动刷新，超过3天需要重新登录。）

前端在调用接口之前先判断token是否过期（3o分钟），过期则先调刷新接口，换取新token,

1引入相关jar

<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-gateway</artifactId></dependency><dependency> <groupId>io.jsonwebtoken</groupId> <artifactId>jjwt</artifactId> <version>0.9.0</version></dependency>

2编写Jwt工具类（生成token + 解析token）

package spring.cloud.gateway.common;import java.text.DateFormat;import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;import java.util.HashMap;import java.util.Map;import io.jsonwebtoken.ExpiredJwtException;import org.springframework.util.StringUtils;import io.jsonwebtoken.Jwts;import io.jsonwebtoken.SignatureAlgorithm;public class JwtUtil { public static final String SECRET = "qazwsx123444$#%#()*&& asdaswwi1235 ?;!@#kmmmpom in***xx**&"; public static final String TOKEN_PREFIX = "Bearer"; public static final String LOGIN_URL = "/token/userId/pwd"; public static final String LOGOUT_URL = "/token/userId"; public static final String HEADER_AUTH = "authorization"; public static final String HEADER_USERID = "userid"; //token超时时间 public static final int TOKEN_EXPIRATION_MINUTE = 30; //token的redis超时时间 public static final int TOKEN_REDIS_EXPIRATION_DAY = 7; public static String generateToken(String userId) { Calendar calendar = Calendar.getInstance(); calendar.add(Calendar.MINUTE, TOKEN_EXPIRATION_MINUTE); //得到前一天 Date date = calendar.getTime(); DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); df.format(date); //todo 优化token的生层规则 HashMap<String, Object> map = new HashMap<>(); map.put(HEADER_USERID, userId); String jwt = Jwts.builder() .setSubject(HEADER_USERID).setClaims(map) .setExpiration(date) .signWith(SignatureAlgorithm.HS512, SECRET) .compact(); return TOKEN_PREFIX + " " + jwt; } public static Map<String, String> validateToken(String token) { HashMap<String, String> tokenMap = new HashMap<String, String>(); if (StringUtils.isEmpty(token)) { return tokenMap; } try { Map<String, Object> tokenBody = Jwts.parser() .setSigningKey(SECRET) .parseClaimsJws(token.replace(TOKEN_PREFIX, "")) .getBody(); String userId = String.valueOf(tokenBody.get(HEADER_USERID)); tokenMap.put(HEADER_USERID, userId); }catch (ExpiredJwtException e){ e.printStackTrace(); } return tokenMap; } /** * 移到jwtUtil中去 * * @param token * @return */ public static Map<String, String> validateTokenAndUser(String token, String userIdIn) { Map<String, String> tokenResultMap = new HashMap<>(); if (StringUtils.isEmpty(token) || StringUtils.isEmpty(userIdIn)) { return tokenResultMap; } tokenResultMap = validateToken(token); if (StringUtils.isEmpty(token) || StringUtils.isEmpty(userIdIn)) { return tokenResultMap; } //判断传入的userid和token是否匹配 String userIdOri = tokenResultMap.get(HEADER_USERID); if (!userIdIn.equals(userIdOri)) { return new HashMap<String,String>(); } return tokenResultMap; }}

3编写过滤器类

package spring.cloud.gateway.filter;import java.net.URI;import java.util.Map;import org.apache.commons.lang.StringUtils;import org.springframework.cloud.gateway.filter.GatewayFilterChain;import org.springframework.cloud.gateway.filter.GlobalFilter;import org.springframework.cloud.gateway.route.Route;import org.springframework.cloud.gateway.support.ServerWebExchangeUtils;import org.springframework.http.HttpHeaders;import org.springframework.http.HttpMethod;import org.springframework.http.server.PathContainer;import org.springframework.http.server.reactive.ServerHttpRequest;import org.springframework.stereotype.Component;import org.springframework.web.server.ServerWebExchange;import reactor.core.publisher.Mono;import spring.cloud.gateway.common.JwtUtil;import spring.cloud.gateway.exception.PermissionException;/** * 参数参考 https://blog.csdn.net/tianyaleixiaowu/article/details/83375246 * response参考 https://bbs.csdn.net/topics/392412604?list=11074255 */@Componentpublic class AuthFilter implements GlobalFilter { @Override public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) { ServerHttpRequest request = exchange.getRequest(); HttpHeaders header = request.getHeaders(); HttpMethod method = request.getMethod(); String token = header.getFirst(JwtUtil.HEADER_AUTH); String userId = header.getFirst(JwtUtil.HEADER_USERID); PathContainer pathContainer = request.getPath().pathWithinApplication(); String path = pathContainer.value(); //2- 处理登录请求 if (StringUtils.isBlank(token)) { //是登录接口则放行，否则返回异常 if (path.contains(JwtUtil.LOGIN_URL) && HttpMethod.POST.equals(method)) { throw new PermissionException("please login"); } return chain.filter(exchange); } //3- 处理刷新token请求 if (path.indexOf("refresh") >= 0) { //放行去掉刷新接口（在刷新前校验userId和token是否匹配） return chain.filter(exchange); } //4- 处理刷新token请求 if (path.contains(JwtUtil.LOGOUT_URL) && HttpMethod.DELETE.equals(method)) { //放行去掉登出接口（在刷新前校验userId和token是否匹配） return chain.filter(exchange); } //5- 携带token请求其他业务接口 Map<String, String> validateResultMap = JwtUtil.validateTokenAndUser(token, userId); if (validateResultMap == null || validateResultMap.isEmpty()) { throw new PermissionException("token 已经失效"); } // TODO 将用户信息存放在请求header中传递给下游业务 Route gatewayUrl = exchange.getRequiredAttribute(ServerWebExchangeUtils.GATEWAY_ROUTE_ATTR); URI uri = gatewayUrl.getUri(); //表示下游请求对应的服务名如 SPRING-CLOUD-SERVICE SPRING-CLOUD-GATEWAY String serviceName = uri.getHost(); ServerHttpRequest.Builder mutate = request.mutate(); mutate.header("x-user-id", validateResultMap.get("userid")); mutate.header("x-user-name", validateResultMap.get("user")); mutate.header("x-user-serviceName", serviceName); ServerHttpRequest buildReuqest = mutate.build(); //todo 如果响应中需要放数据，也可以放在response的header中 //ServerHttpResponse response = exchange.getResponse(); //response.getHeaders().add("new_token","token_value"); return chain.filter(exchange.mutate().request(buildReuqest).build()); }}

4编写相关接口API

package spring.cloud.gateway.controller;import org.springframework.web.bind.annotation.*;import spring.cloud.gateway.common.JwtUtil;import java.util.Map;@RestController@RequestMapping("/token")public class TokenController { /** * 登录接口 * @param user（userID +pwd） * @return */ @PostMapping("/userId/pwd") public String getToken(@RequestBody Map<String,String> user) { //用户名密码需要加密处理 String result = ""; if (user == null || user.isEmpty()) { return result; } String userId = user.get("userId"); String pwd = user.get("pwd"); if (!doLogin(userId,pwd)) { return result; } String token = JwtUtil.generateToken(userId); // todo 将token放入redis中，设置超时时间为 2 * t return token; } private Boolean doLogin(String userId,String pwd) { //后续对接user表验证 if ("admin".equals(userId) && "123".equals(pwd)) { return true; } if ("spring".equals(userId) && "123".equals(pwd)) { return true; } if ("gateway".equals(userId) && "123".equals(pwd)) { return true; } return false; } /** * 登出接口 */ /** * 刷新token的接口 * 在刷新前校验userId和token是否匹配 */}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。