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基于swing的企业人事管理系统

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作者你好,我按照你给的使用说明运行成功了,数据库也建立了,但是登录成功之后页面没有跳转,后台报了一个这样的错误: ![image](https://user-images.githubusercontent.com/64886150/103332658-d47db700-4aa5-11eb-9808-4dd4a8bd62e9.png) Exception in thread "AWT-EventQueue-0" org.springframework.dao.EmptyResultDataAccessException: Incorrect result size: expected 1, actual 0 at org.springframework.dao.support.DataAccessUtils.requiredSingleResult(DataAccessUtils.java:71) at org.springframework.jdbc.core.JdbcTemplate.queryForObject(JdbcTemplate.java:797) at dao.DeptDao.findDeptById(DeptDao.java:18) at view.MainFrame.initialize(MainFrame.java:496) at view.MainFrame.(MainFrame.java:118) ..... 能帮我看一下是什么原因吗?