初始化项目

src/main/java/cn/xf/basedemo/common/utils/JwtTokenUtils.java

@@ -0,0 +1,126 @@
+package cn.xf.basedemo.common.utils;
+
+import com.auth0.jwt.JWT;
+import com.auth0.jwt.JWTVerifier;
+import com.auth0.jwt.algorithms.Algorithm;
+import com.auth0.jwt.exceptions.TokenExpiredException;
+import com.auth0.jwt.interfaces.Claim;
+import com.auth0.jwt.interfaces.DecodedJWT;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.commons.lang3.StringUtils;
+
+import java.util.Date;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Description: JwtToken
+ *
+ * @author rsh
+ * @date 2021/9/17 2:00 下午
+ */
+@Slf4j
+public class JwtTokenUtils {
+
+	private String tokenSecret;
+	private int tokenExpire;
+
+	public JwtTokenUtils(String tokenSecret, int tokenExpire) {
+		this.tokenSecret = StringUtils.isNotEmpty(tokenSecret) ? tokenSecret : "remaindertime";
+		this.tokenExpire = tokenExpire > 0 ? tokenExpire : 14400;
+	}
+
+	public String getTokenSecret() {
+		return tokenSecret;
+	}
+
+	public int getTokenExpire() {
+		return tokenExpire;
+	}
+
+	private final static String USER_ID = "userId";
+
+	/**
+	 * JWT生成Token.<br/>
+	 * <p>
+	 * JWT构成: header, payload, signature
+	 *
+	 * @param userId 用户id
+	 */
+	public String createToken(int userId) {
+		try {
+			Date iatDate = new Date();
+			// expire time
+//		    Date expiresDate = DateUtils.getByDateAfterMin(iatDate, tokenExpire);
+
+			// header Map
+			Map<String, Object> map = new HashMap<>();
+			map.put("alg", "HS256");
+			map.put("typ", "JWT");
+
+			// build token
+			// param backups {iss:Service, aud:APP}
+			String token = JWT.create().withHeader(map)
+					.withClaim("iss", "ll-app-business")
+					.withClaim("aud", "APP")
+					.withClaim(USER_ID, String.valueOf(userId))
+					.withIssuedAt(iatDate)
+//				    .withExpiresAt(expiresDate)
+					.sign(Algorithm.HMAC256(tokenSecret));
+
+			return token;
+		} catch (Exception e) {
+			log.error("生成token异常", e);
+		}
+		return null;
+	}
+
+	/**
+	 * 解密Token
+	 *
+	 * @param token
+	 * @return
+	 * @throws Exception
+	 */
+	public Map<String, Claim> verifyToken(String token) {
+		if (token == null) {
+			return null;
+		}
+		try {
+			JWTVerifier verifier = JWT.require(Algorithm.HMAC256(tokenSecret)).build();
+			DecodedJWT jwt = verifier.verify(token);
+			return jwt.getClaims();
+		} catch (Exception e) {
+			if (e instanceof TokenExpiredException) {
+				// token 已过期
+			}
+			log.error("解密Token异常", e);
+		}
+		return null;
+	}
+
+	/**
+	 * 根据Token获取userId
+	 *
+	 * @param token
+	 * @return userId
+	 */
+	public Integer getUserId(String token) {
+		Map<String, Claim> claims = verifyToken(token);
+		if (claims != null) {
+			return null;
+		}
+
+		Claim claim = claims.get(USER_ID);
+		if (null == claim || StringUtils.isEmpty(claim.asString())) {
+			return null;
+		}
+		return Integer.parseInt(claim.asString());
+	}
+
+	public static void main(String[] args) {
+		JwtTokenUtils jwtTokenUtils = new JwtTokenUtils("124235rfwe234", 100000);
+		System.out.println(jwtTokenUtils.createToken(1));
+	}
+
+}