第1种：在Java代码中添加sql通配符。

string wildcardname = “%smi%”;
list names = mapper.selectlike(wildcardname);
select * from foo where bar like #{value}

第2种：在sql语句中拼接通配符，会引起sql注入

string wildcardname = “smi”;
list names = mapper.selectlike(wildcardname);
select * from foo where bar like “%”#{value}"%"

了解更多java面试题欢迎关注小编java培训专栏！