模糊查询like语句该怎么写?

第1种：在Java代码中添加sql通配符。

string wildcardname = “%smi%”;
    list<name> names = mapper.selectlike(wildcardname);

    <select id=”selectlike”>
 select * from foo where bar like #{value}
    </select>
复制代码

第2种：在sql语句中拼接通配符，会引起sql注入

string wildcardname = “smi”;
    list<name> names = mapper.selectlike(wildcardname);

    <select id=”selectlike”>
 select * from foo where bar like "%"#{value}"%"
    </select>
复制代码