EXEED_back/src/main/java/com/zh/project0512/utils/JwtUtil.java

package com.zh.project0512.utils;

import io.jsonwebtoken.*;
import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

import java.util.Date;
import java.util.HashMap;
import java.util.Map;

@ConfigurationProperties(prefix = "jwt")
@Component
@Data
public class JwtUtil {

    private String secret = "secret";

    private long expire = 24*60*60;

    /**
     * 签发jwt
     *
     * @param id
     * @return
     */
    public String createJWT(String id) {
        Date date = new Date();
        Date expireDate = new Date(date.getTime() + expire*1000);
        String jwt= Jwts.builder().setId(id) .setSubject("token")
            .setExpiration(expireDate)
            .signWith(SignatureAlgorithm.HS256,secret)
            .compact();
        return jwt;
    }

    /**
     * 解析JWT
     *
     * @param jwt
     * @return
     */
    public Claims parseJWT(String jwt) {
        try {
            return Jwts.parser().setSigningKey(secret).parseClaimsJws(jwt).getBody();
        }catch (Exception e){
            return null;
        }

    }
    /**
     * 解析JWT 用户openid
     *
     * @param jwt
     * @return
     */
    public String parseOpenid(String jwt) {
        try {
            return Jwts.parser().setSigningKey(secret).parseClaimsJws(jwt).getBody().getId();
        }catch (Exception e){
            return null;
        }

    }
    /**
     * token是否过期
     * @return  true：过期
     */
    public boolean isTokenExpired(Date expiration) {
        return expiration.before(new Date());
    }


}