JJWT工具类

依赖

 <dependency>
        <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-configuration-processor</artifactId>
       <optional>true</optional>
</dependency>
<dependency>
       <groupId>org.projectlombok</groupId>
       <artifactId>lombok</artifactId>
       <optional>true</optional>
</dependency>
<dependency>
       <groupId>io.jsonwebtoken</groupId>
       <artifactId>jjwt</artifactId>
       <version>0.9.1</version>
</dependency>

JJWT 工具类

package com.example.utils.jwt;

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.JwtBuilder;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
import java.util.Date;
import java.util.HashMap;

/** * @author zpc * @version 1.0 * @date 2022/2/19 13:56 */
@Component
@ConfigurationProperties(prefix = "jwt.config")
@Data
@NoArgsConstructor
@AllArgsConstructor
public class JwtUtil {
    

    private String key;

    private long ttl;

    /** * 生成 JWT * @param id * @param subject * @param roles 角色 * @return */
    public String createJWT(String id, String subject, String roles) {
    

        long nowMillis = System.currentTimeMillis();
        Date nowDate = new Date(nowMillis);

        HashMap<String, Object> map = new HashMap<>();
        map.put("alg", "HS256");
        map.put("typ", "JWT");

        JwtBuilder builder = Jwts.builder()
                .setHeaderParams(map)
                // 设置 id
                .setId(id)
                // 设置用户名
                .setSubject(subject)
                // 设置 jwt 签发时间
                .setIssuedAt(nowDate)
                // 设置签名使用的签名算法和签名使用的密钥
                .signWith(SignatureAlgorithm.HS256, key)
                .claim("roles", roles);
        if (ttl > 0) {
    
            builder.setExpiration(new Date(nowMillis + ttl));
        }
        return builder.compact();
    }

    /** * 解析 JWT * @param jwtStr * @return */
    public Claims parseJWT(String jwtStr) {
    
        return Jwts.parser()
                .setSigningKey(key)
                .parseClaimsJws(jwtStr)
                .getBody();
    }

}

application.yml 配置

jwt:
  config:
    ttl: 设置过期时间
    key: 设置签名使用的密钥