JWT工具类（拿来直接用就完了，注释解释的很详细，看不懂建议撞墙祛湿）

SpringSecurity+JWT

依赖

<!-- https://mvnrepository.com/artifact/io.jsonwebtoken/jjwt -->
        <dependency>
            <groupId>io.jsonwebtoken</groupId>
            <artifactId>jjwt</artifactId>
            <version>0.9.1</version>
        </dependency>
        <!--这个是用于进行数据校验的-->
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-validation -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-validation</artifactId>
    <version>2.6.3</version>
</dependency>
<!--SpringSecurity的依赖-->
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-security -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
            <version>2.6.3</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework.security/spring-security-core -->
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-core</artifactId>
            <version>5.6.1</version>
        </dependency>

yaml配置文件

#jwt: data :这个路径是根据JWTUtil中的
#@ConfigurationProperties("jwt.data")配置的
jwt:
  data:
#    jwt加密密钥
    SECRET: jwt-token-secret
#    jwt储存的请求头Authorization固定写法
    tokenHeader: Authorization
#      jwt的过期时间(60s*60min*24h*7day)
    expiration: 604800
#    jwt负载中拿到的头信息
    tokenHead: Bearer

JWTUtil

package com.example.jwtutil.utils;

import com.example.jwtutil.entity.User;
import io.jsonwebtoken.*;
import lombok.Data