JWT使用例子

引起maven包

<dependency>
   <groupId>com.auth0</groupId>
   <artifactId>java-jwt</artifactId>
   <version>3.4.0</version>
</dependency>

try {
    String secret = "chen";// 密钥
    String issUer = "xiaochen";//身份
    Algorithm algorithm = Algorithm.HMAC256(secret);
    String token = JWT.create()
            .withIssuer(issUer)
            .withClaim("loginName", "chenyuepeng").withClaim("userCode", "chenyuepeng")// 要传的参数
            .sign(algorithm);
    System.out.println(token);

    Algorithm algorithm2 = Algorithm.HMAC256(secret);
    JWTVerifier verifier = JWT.require(algorithm2)
            .withIssuer(issUer)
            .build(); //Reusable verifier instance
    DecodedJWT jwt = verifier.verify(token);
    System.out.println("loginName:" + jwt.getClaim("loginName").asString());
} catch (JWTCreationException exception){
    System.out.println(exception.getMessage());
}