jwt权限验证

• Z时代
• 2024-01-10
• 分类：综合

1、增加pom.xml配置

<dependency>
	<groupId>com.auth0</groupId>
	<artifactId>java-jwt</artifactId>
	<version>3.2.0</version>
</dependency>
<dependency>
	<groupId>io.jsonwebtoken</groupId>
	<artifactId>jjwt</artifactId>
	<version>0.7.0</version>
</dependency>

2、jwt操作工具类

public class JwtUtils {
//秘钥
static final String SECERT = "秘钥";
static final long EXPIRATION_TIMEMILLIS = 60000 * 60 * 8; //默认8小时验证
/**
 * 签发JWT
 *
 * @param id
 * @param subject   可以是JSON数据 尽可能少
 * @param ttlMillis 过期时间
 * @return String
 */
public static String createJWT(String id, String subject, long ttlMillis) {
	SignatureAlgorithm signatureAlgorithm = SignatureAlgorithm.HS256;
	long nowMillis = System.currentTimeMillis();
	Date now = new Date(nowMillis);
	SecretKey secretKey = generalKey();
	Map<String, Object> claims = new HashMap<>();
	claims.put("uid", "123456");
	claims.put("user_name", "admin");
	claims.put("nick_name", "X-rapido");
	JwtBuilder builder = Jwts.builder()
			.setClaims(claims)
			.setId(id)
			.setSubject(subject)   // 主题
			.setIssuer("user")     // 签发者
			.setIssuedAt(now)      // 签发时间
			.signWith(signatureAlgorithm, secretKey); // 签名算法以及密匙
	if (ttlMillis >= 0) {
		long expMillis = nowMillis + ttlMillis;
		Date expDate = new Date(expMillis);
		builder.setExpiration(expDate); // 过期时间
	} else {
		long expMillis = nowMillis + EXPIRATION_TIMEMILLIS;
		Date expDate = new Date(expMillis);
		builder.setExpiration(expDate); // 过期时间
	}
	return builder.compact();
}
/**
 * 验证JWT
 *
 * @param jwtStr
 * @return
 */
public static BasePageData validateJWT(String jwtStr) {
	BasePageData checkResult = new BasePageData();
	Claims claims = null;
	try {
		claims = parseJWT(jwtStr);
		checkResult.setCode(WebResponseCode.APPSUCCESS);
		checkResult.setData(claims);
		checkResult.setMsg("验证成功");
	} catch (ExpiredJwtException e) {
		checkResult.setCode(WebResponseCode.APPFAIL);
		checkResult.setData(null);
		checkResult.setMsg("验证过期");
	} catch (SignatureException e) {
		checkResult.setCode(WebResponseCode.APPFAIL);
		checkResult.setData(null);
		checkResult.setMsg("签名异常");
	} catch (Exception e) {
		checkResult.setCode(WebResponseCode.APPFAIL);
		checkResult.setData(null);
		checkResult.setMsg("用户名 或者 密码不正确");
	}
	return checkResult;
}
/**
 * 获取秘钥
 *
 * @return
 */
public static SecretKey generalKey() {
	Base64.Decoder decoder = Base64.getDecoder();
	byte[] encodedKey = decoder.decode(SECERT);//秘钥
	SecretKey key = new SecretKeySpec(encodedKey, 0, encodedKey.length, "AES");
	return key;
}
/**
 * 解析JWT字符串
 *
 * @param jwt
 * @return
 * @throws Exception
 */
public static Claims parseJWT(String jwt) throws Exception {
	SecretKey secretKey = generalKey();
	return Jwts.parser()
			.setSigningKey(secretKey)
			.parseClaimsJws(jwt)
			.getBody();
}
public static void main(String[] args) {
	System.out.println("##########nowDate=" + DateUtil.getStringDate());
	String jwt = createJWT("1", "jack", 7000);
	System.out.println("===========jwt=" + jwt);
 	System.out.println("n解密n");
	BasePageData resulet = validateJWT(jwt);
	System.out.println("#########resulet#" + JsonUtils.toJson(resulet));
	System.out.println("n过期时间验证- 延迟5s - n");
	try {
		Thread.sleep(5000);
		System.out.println("##########nowDate=" + DateUtil.getStringDate());
	} catch (Exception e) {
		e.printStackTrace();
	}
	BasePageData resulet_later = validateJWT(jwt);
	System.out.println("#########resulet#" + JsonUtils.toJson(resulet_later));
}
}

参考资料：
	https://www.cnblogs.com/wangshouchang/p/9551748.html
	https://www.jianshu.com/p/fe67b4bb6f2c

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