1. 复现错误
今天调用本地接口时，控制台却报出如下的错误：
io.jsonwebtoken.ExpiredJwtException: JWT expired at 2023-04-11T14:59:18+0800. Current time: 2023-04-11T15:16:30+0800
at io.jsonwebtoken.impl.DefaultJwtParser.parse(DefaultJwtParser.java:365)
at io.jsonwebtoken.impl.DefaultJwtParser.parse(DefaultJwtParser.java:458)
at io.jsonwebtoken.impl.DefaultJwtParser.parseClaimsJws(DefaultJwtParser.java:518)
at com.test.config.jwt.Jwvider.checkToken(JwtTokenProvider.java:76)
at com.test.controller.AppPageController.pageContentDetail(AppPageController.java:145)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:197)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:894)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1063)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:626)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at com.github.xiaoymin.knife4j.spring.filter.SecurityBasicAuthFilter.doFilter(SecurityBasicAuthFilter.java:87)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:114)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:204)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:183)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:358)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:271)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:96)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.ssssssss.magicapi.core.config.MagicCorsFilter.doFilter(MagicCorsFilter.java:41)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
......
2. 分析错误
错误信息这么多，我们只需要关注这句话：
io.jsonwebtoken.ExpiredJwtException: JWT expired at 2023-04-11T14:59:18+0800. Current time: 2023-04-11T15:16:30+0800
这是jwt抛出的异常，根据错误信息可知：
jwt的预计过期时间是2023-04-11 14:59:18，而系统的当前时间是2023-04-11 15:16:30。
换句话说，系统的时间超过了jwt设置的过期时间。
3. 解决错误
由于系统的时间超过了jwt设置的过期时间，我们可以采用如下方法解决。
- 重新生成
jwt token
一般情况下，我们在登录时就会创建jwt token，故需要调用登录接口来获取最新的jwt token，如下图所示：
复制上图中的token，调用已写好的checkToken方法，成功执行，如下图所示：
当然，如果你是在网页上出现这个错误，可以退出账号重新登录即可。
- 延长
jwt token的失效时间
我们在实际开发中，一般设置时间时间为2小时，我们可以将其修改为12小时。
你可以在application.yml文件中修改，如下配置所示：
# jwt配置
jwt:
tokenHeader: Authorization # JWT存储的请求头
# 令牌前缀: JWT负载中拿到开头
tokenStartWith: Bearer
#JWT加解密使用的密钥的base64编码
secret: xxxx
expiration: 43200000 #JWT的超期限时间-12小时候超时，以毫秒为单位
typ: JWT
alg: xxx
subject: xxx
当然，你也可以在代码中修改，如下代码所示：
/**
* 创建token
*
* @return 返回jwt token
*/
public String createToken(TokenProperties tokenProperties) {
Date date = new Date(System.currentTimeMillis() + 43200000);
String token =
Jwts.builder()
.setSubject(JSON.toJSONString(tokenProperties))
.setExpiration(date)
.signWith(SignatureAlgorithm.HS512, key)
.compact();
return properties.getTokenStartWith() + SPACING + token;
}
但在实际开发中，我们不建议在代码中修改，因为本地环境、测试环境、线上环境对jwt token的失效时间的要求是不一样的。
因而，我们一般在application-xxx.yml配置：
-
application-local.yml本地环境，可以将失效时间设置久点，比如86400000毫秒(24小时)，避免在调试接口时反复登录。 -
application-dev.yml测试环境，也可以将失效时间43200000毫秒(12小时) -
application-prd.yml正式环境，可以将失效时间设置为2小时，也就是7200000毫秒
4. 补充说明
正赶上最近ChatGPT比较火，借助他来分析下上述错误，如下图所示：
