表中一定要有主键 : select :id,此处的id位置处必须是主键 insert into table_name(id, name, password) select :id, :name, :password from dual where not exists ( select * from table_name where id = :id )
通过使用form的onsibmit来控制是否提交数据 返回值为真是提交,其他不变,示例如下: JS部分 function check() { var newPwd = document.getElementById("newPwd"); var confirmNewPwd = document.getElementById("confirmNewPwd"); if (newPwd.value == confirmNewPwd.value) return true;
function isStatic(value) { return( typeof value === 'string' || typeof value === 'number' || typeof value === 'boolean' || typeof value === 'undefined' || value === null )}