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?

Java reflection 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:

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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:

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