public boolean checkUsername(String username) throws Exception{ boolean flag = false; String sql = "select * from user where username=?" ; QueryRunner runner = new QueryRunner(WebUtil.getDataSource()); User user = runner.query(sql,new BeanHandler(User.class ),username); //在数据库中没有改用户名 if(user == null){ flag = true; } return flag; }
数据库中检测用户名是否唯一
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转载自q137681467.iteye.com/blog/2022453
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