mybatis连接MySQL8出现的问题解决方法

Connection conn = null;
try {
  String userName = "root";
  String password = "111@tesT";
  String jdbcurl = "jdbc:mysql://localhost:3306/test?useUnicode=true&useSSL=false&autoReconnect=true&characterEncoding=UTF-8";
  Class.forName("com.mysql.jdbc.Driver").newInstance();
  conn = DriverManager.getConnection(jdbcurl, userName, password);
  String sql = "select * from tb_user";
  PreparedStatement pstmt = conn.prepareStatement(sql);
  ResultSet rs = pstmt.executeQuery();
  String result = "";
  while (rs.next()) {
    int id = rs.getInt("id");
    String name = rs.getString("username");
    String status = rs.getString("phone");
    result += id + "\t" + name + "\t" + status + "\n";
  }
  System.out.println(result);

UserExample example = new UserExample();
UserExample.Criteria criteria = example.createCriteria();
criteria.andIdEqualTo(userId);
List<User> list = userMapper.selectByExample(example);//这一步进去后就出不来了。。。

#数据库连接 注意 文件内不要留有空格
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/test?useSSL=false&useUnicode=true&characterEncoding=UTF8&serverTimezone=GMT
jdbc.username=root
jdbc.password=111@tesT