mybatis3中在mapper接口方法中如何使用多参

How do I use multiple parameters in a mapper?

mybatis3中在mapper接口方法中如何使用多参

Java reflection does not provide a way to know the name of a method parameter so MyBatis names them by default like: param1, param2...

对于方法参数的名称，Java反射没有提供方法去获得这个参数的名字，所以mybatis3　就把这些参数按照约定的方式命名为

param1, param2...

If you want to give them a name use the @param annotation this way:

如果哦你想提供个有意义的名字，那就用 @param注解吧．

<span style="font-size:18px;">import org.apache.ibatis.annotations.Param;
public interface UserMapper {
   User selectUser(@Param("username") String username, @Param("hashedPassword") String hashedPassword);
}</span>

Now you can use them in your xml like follows:

<span style="font-size:18px;"><select id=”selectUser” resultType=”User”>
  select id, username, hashedPassword
  from some_table
  where username = #{username}
  and hashedPassword = #{hashedPassword}
</select></span>