113 lines
3.5 KiB
Java
113 lines
3.5 KiB
Java
package cn.celess.blog.util;
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import cn.celess.blog.enmu.ResponseEnum;
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import cn.celess.blog.entity.User;
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import cn.celess.blog.exception.MyException;
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import io.jsonwebtoken.*;
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import lombok.extern.log4j.Log4j2;
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import org.springframework.beans.factory.annotation.Value;
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import org.springframework.stereotype.Component;
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import java.time.Instant;
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import java.util.Date;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* @Author: 小海
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* @Date: 2019/11/16 11:26
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* @Description: JWT工具类
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*/
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@Component
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@Log4j2
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public class JwtUtil {
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private static final String CLAIM_KEY_USERNAME = "sub";
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/**
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* 5天(毫秒)
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*/
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public static final long EXPIRATION_LONG_TIME = 432000000;
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/**
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* 两小时（毫秒）
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*/
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public static final long EXPIRATION_SHORT_TIME = 7200000;
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/**
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* JWT 秘钥需自行设置不可泄露
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*/
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@Value("${jwt.secret}")
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private String SECRET;
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public String generateToken(User user, boolean isRemember) {
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Map<String, Object> claims = new HashMap<>(16);
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claims.put(CLAIM_KEY_USERNAME, user.getEmail());
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return Jwts.builder()
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.setClaims(claims)
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.setExpiration(new Date(Instant.now().toEpochMilli() + (isRemember ? EXPIRATION_LONG_TIME : EXPIRATION_SHORT_TIME)))
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.signWith(SignatureAlgorithm.HS512, SECRET)
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.compact();
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}
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public String updateTokenDate(String token) {
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Claims claims = Jwts.parser().setSigningKey(SECRET).parseClaimsJws(token).getBody();
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return Jwts.builder()
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.setClaims(claims)
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.setExpiration(new Date(claims.getExpiration().getTime() + EXPIRATION_SHORT_TIME))
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.signWith(SignatureAlgorithm.HS512, SECRET)
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.compact();
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}
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/**
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* 获取token是否过期
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*/
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public Boolean isTokenExpired(String token) {
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Date expiration = getExpirationDateFromToken(token);
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return expiration == null || expiration.before(new Date());
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}
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/**
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* 根据token获取username
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*/
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public String getUsernameFromToken(String token) {
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Claims claims = getClaimsFromToken(token);
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return claims == null ? null : claims.getSubject();
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}
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/**
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* 获取token的过期时间
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*/
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public Date getExpirationDateFromToken(String token) {
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Claims claims = getClaimsFromToken(token);
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return claims == null ? null : claims.getExpiration();
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}
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/**
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* 解析JWT
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*/
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private Claims getClaimsFromToken(String token) {
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Claims claims = null;
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try {
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claims = Jwts.parser()
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.setSigningKey(SECRET)
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.parseClaimsJws(token)
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.getBody();
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} catch (ExpiredJwtException e) {
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log.info("JWT令牌过期");
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} catch (UnsupportedJwtException e) {
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log.info("不支持的JWT令牌");
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throw new MyException(ResponseEnum.JWT_NOT_SUPPORT);
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} catch (MalformedJwtException e) {
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log.info("JWT令牌格式错误");
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throw new MyException(ResponseEnum.JWT_MALFORMED);
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} catch (SignatureException e) {
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log.info("JWT签名错误");
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throw new MyException(ResponseEnum.JWT_SIGNATURE);
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} catch (IllegalArgumentException e) {
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log.debug("JWT非法参数");
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}
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return claims;
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}
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}
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