It's a security demo using SpringSecurity Authentication and Authorization and JWT.

Create Mysql Table.
(1) CREATE TABLE tb_user ( id int(22) NOT NULL AUTO_INCREMENT, username varchar(45) NOT NULL, password varchar(200) NOT NULL, PRIMARY KEY (id) ) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
(2) CREATE TABLE tb_user_role_group_relationship ( id int(22) NOT NULL AUTO_INCREMENT, user_id varchar(45) NOT NULL, role_group_id varchar(45) NOT NULL, PRIMARY KEY (id) ) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
(3) CREATE TABLE tb_role_group ( id int(22) NOT NULL AUTO_INCREMENT, group_name varchar(45) NOT NULL, PRIMARY KEY (id) ) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
(4) CREATE TABLE tb_role_group_relationship ( id int(22) NOT NULL AUTO_INCREMENT, role_group_id varchar(45) NOT NULL, role_id varchar(45) NOT NULL, PRIMARY KEY (id) ) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
(5) CREATE TABLE tb_role ( id int(22) NOT NULL AUTO_INCREMENT, name varchar(45) NOT NULL, remark varchar(45) DEFAULT NULL, PRIMARY KEY (id) ) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
(6) INSERT INTO tb_role (id, name, remark) VALUES (1, "ROLE_USER", "user");
(7) INSERT INTO tb_role_group (id, group_name) VALUES (1, "user_group");
(8) INSERT INTO tb_role_group_relationship (id, role_group_id, role_id) VALUES (1, 1, 1);

Run SecurityApplication.

SignUp.
curl -ik -X POST 'http://127.0.0.1:8080/users/signup' -d '{"username":"123","password":"123"}' -H 'Content-Type:application/json'

Add Role for User.
INSERT INTO tb_user_role_group_relationship (id, user_id, role_group_id) VALUES (1, 1, 1);

Login.
curl -ik -X POST 'http://127.0.0.1:8080/login' -d '{"username":"123","password":"123"}' -H 'Content-Type:application/json'

Interface Test.
curl -ik -X GET 'http://127.0.0.1:8080/users/authorityList' -H 'Authorization: Bearer xxx' (Set authorization value from login interface response header. This request will fail without correct authorization info. This request will fail after truncate table 'tb_user_role_group_relationship'.)