Mybatis怎么在mapper中用多个参数

原文地址：https://github.com/mybatis/mybatis-3/wiki/FAQ

How do I use multiple parameters in a mapper?

Javareflection does not provide a way to know the name of a method parameter so MyBatis names them by default like: param1, param2...
If you want to give them a name use the @param annotation this way:

import org.apache.ibatis.annotations.Param;
public interface UserMapper {
   User selectUser(@Param("username") String username, @Param("hashedPassword") String hashedPassword);
}

Now you can use them in your xml like follows:

<select id=”selectUser” resultType=”User”>
  select id, username, hashedPassword
  from some_table
  where username = #{username}
  and hashedPassword = #{hashedPassword}
</select>