[移动开发]JWT token生成传递和解析的案例（kotlin）

JWT 做token的校验，非常的方便，具体作用可以google查一下，这里只记录怎么使用
1、引入jwt的依赖

    /**
     * java-jwt
     */
    implementation("com.auth0:java-jwt:3.18.1")

2、编写JWT的工具类

@Component
@Slf4j
class JwtUtil(val jwtProperties: JwtProperties){

	open fun validateToken(authToken: String?): Boolean {
		val algorithm: Algorithm = Algorithm.HMAC512(jwtProperties.secret)
		val verifier = JWT.require(algorithm).build()
		try {
			verifier.verify(authToken)
			return true
		} catch (e: JWTVerificationException) {
			log.warn("Invalid signature/claims :: {}", e.message)
		}
		return false
	}

	open fun extractUserFromJwt(token: String): Map<String?, Claim?>? {
		val token = if (token.startsWith("Bearer ")) token.substring(7) else token
		val verificationSucceeded =
			validateToken(token)
		if (!verificationSucceeded) {
			throw Exception("Token was unauthorized")
		}
		try {
			val jwt = JWT.decode(token)
			return jwt.claims
		} catch (e: JWTDecodeException) {
			log.error("Failed to decode token", e)
		}
		return null
	}
}

@Component
@ConfigurationProperties(prefix="jwt")
data class JwtProperties (
 var header: String?=null,
 var tokenHead: String?=null,
 var secret: String?=null,
 var expirationInMs: Long?=null
)

jwt:
  header: "Authorization"
  tokenHead: "Bearer "
  secret: XXXXXXXX
  expirationInMs: 22133

3、JWT的使用

open class AliPayController (
	val alipayTemplate: AlipayTemplate,
	val platformOrderService:IPlatformOrderService,
	val jwtUtil: JwtUtil
	){
open fun payOrder(@RequestBody aliPayVo: AliPayVo,@RequestHeader("Authorization") token: String): String? {
val platformOrder = PlatformOrder()
platformOrder.tenantId = jwtUtil.extractUserFromJwt(token)!!["tenantId"]!!.asLong()
platformOrder.fromUserId = jwtUtil.extractUserFromJwt(token)!!["userId"]!!.asLong()
}
}