具体实现截图
主要功能:
基于java的教室设备管理系统
系统分为学生，教师，管理员三个角色：
学生功能：
（1）用户登录系统
（2）学生查看相关通知消息
（3）学生查看个人信息，修改个人信息
（4）学生查看教室设备，对教室设备进行借用和归还
教室功能：
（1）教师登录系统
（2）教师查看个人信息，修改个人信息
（3）教师在线预约教室
（4）教室查看教室设备，借用和归还设备
管理员功能：
（1）管理员登录系统
（2）管理员管理系统的通知
（3）管理员管理用户，包括学生，教室，管理员信息等
（4）管理员管理教室，添加教室，查看教室的预约和记录信息
（5）管理员对教室的设备进行管理，添加教室的设备
（6）管理员查看设备的借用信息，导出借用记录
代码参考
@IgnoreAuth
@PostMapping(value = "/login")
public R login(String username, String password, String captcha, HttpServletRequest request) {
UsersEntity user = userService.selectOne(new EntityWrapper<UsersEntity>().eq("username", username));
if(user==null || !user.getPassword().equals(password)) {
return R.error("账号或密码不正确");
}
String token = tokenService.generateToken(user.getId(),username, "users", user.getRole());
return R.ok().put("token", token);
}
@Override
public String generateToken(Long userid,String username, String tableName, String role) {
TokenEntity tokenEntity = this.selectOne(new EntityWrapper<TokenEntity>().eq("userid", userid).eq("role", role));
String token = CommonUtil.getRandomString(32);
Calendar cal = Calendar.getInstance();
cal.setTime(new Date());
cal.add(Calendar.HOUR_OF_DAY, 1);
if(tokenEntity!=null) {
tokenEntity.setToken(token);
tokenEntity.setExpiratedtime(cal.getTime());
this.updateById(tokenEntity);
} else {
this.insert(new TokenEntity(userid,username, tableName, role, token, cal.getTime()));
}
return token;
}
/**
* 权限(Token)验证
*/
@Component
public class AuthorizationInterceptor implements HandlerInterceptor {
public static final String LOGIN_TOKEN_KEY = "Token";
@Autowired
private TokenService tokenService;
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
//支持跨域请求
response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
response.setHeader("Access-Control-Max-Age", "3600");
response.setHeader("Access-Control-Allow-Credentials", "true");
response.setHeader("Access-Control-Allow-Headers", "x-requested-with,request-source,Token, Origin,imgType, Content-Type, cache-control,postman-token,Cookie, Accept,authorization");
response.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin"));
// 跨域时会首先发送一个OPTIONS请求，这里我们给OPTIONS请求直接返回正常状态
if (request.getMethod().equals(())) {
response.setStatus(HttpStatus.OK.value());
return false;
}
IgnoreAuth annotation;
if (handler instanceof HandlerMethod) {
annotation = ((HandlerMethod) handler).getMethodAnnotation(IgnoreAuth.class);
} else {
return true;
}
//从header中获取token
String token = request.getHeader(LOGIN_TOKEN_KEY);
/**
* 不需要验证权限的方法直接放过
*/
if(annotation!=null) {
return true;
}
TokenEntity tokenEntity = null;
if(StringUtils.isNotBlank(token)) {
tokenEntity = tokenService.getTokenEntity(token);
}
if(tokenEntity != null) {
request.getSession().setAttribute("userId", tokenEntity.getUserid());
request.getSession().setAttribute("role", tokenEntity.getRole());
request.getSession().setAttribute("tableName", tokenEntity.getTablename());
request.getSession().setAttribute("username", tokenEntity.getUsername());
return true;
}
PrintWriter writer = null;
response.setCharacterEncoding("UTF-8");
response.setContentType("application/json; charset=utf-8");
try {
writer = response.getWriter();
writer.print(JSONObject.toJSONString(R.error(401, "请先登录")));
} finally {
if(writer != null){
writer.close();
}
}
// throw new EIException("请先登录", 401);
return false;
}
}数据库参考
-- ----------------------------
-- Table structure for token
-- ----------------------------
DROP TABLE IF EXISTS `token`;
CREATE TABLE `token` (
`id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '主键',
`userid` bigint(20) NOT NULL COMMENT '用户id',
`username` varchar(100) NOT NULL COMMENT '用户名',
`tablename` varchar(100) DEFAULT NULL COMMENT '表名',
`role` varchar(100) DEFAULT NULL COMMENT '角色',
`token` varchar(200) NOT NULL COMMENT '密码',
`addtime` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '新增时间',
`expiratedtime` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00' COMMENT '过期时间',
PRIMARY KEY (`id`) USING BTREE
) ENGINE=InnoDB AUTO_INCREMENT=27 DEFAULT CHARSET=utf8 ROW_FORMAT=COMPACT COMMENT='token表';
-- ----------------------------
-- Records of token
-- ----------------------------
INSERT INTO `token` VALUES ('9', '23', 'cd01', 'xuesheng', '学生', 'al6svx5qkei1wljry5o1npswhdpqcpcg', '2023-02-23 21:46:45', '2023-03-15 14:01:36');
INSERT INTO `token` VALUES ('10', '11', 'xh01', 'xuesheng', '学生', 'fahmrd9bkhqy04sq0fzrl4h9m86cu6kx', '2023-02-27 18:33:52', '2023-03-17 18:27:42');
INSERT INTO `token` VALUES ('11', '17', 'ch01', 'xuesheng', '学生', 'u5km44scxvzuv5yumdah2lhva0gp4393', '2023-02-27 18:46:19', '2023-02-27 19:48:58');
INSERT INTO `token` VALUES ('12', '1', 'admin', 'users', '管理员', 'h1pqzsb9bldh93m92j9m2sljy9bt1wdh', '2023-02-27 19:37:01', '2023-03-17 18:23:02');
INSERT INTO `token` VALUES ('13', '21', 'xiaohao', 'shezhang', '社长', 'zdm7jh1wnfe27pkxyiuzvxxy27ykl2a', '2023-02-27 19:38:07', '2023-03-17 18:25:20');
INSERT INTO `token` VALUES ('14', '27', 'djy01', 'xuesheng', '学生', 'g3teq4335pe21nwuwj2sqkrpqoabqomm', '2023-03-15 12:56:17', '2023-03-15 14:00:16');
INSERT INTO `token` VALUES ('15', '29', 'dajiyue', 'shezhang', '社长', '0vb1x9xn7riewlp5ddma5ro7lp4u8m9j', '2023-03-15 12:58:08', '2023-03-15 14:03:48');
