如果MyBatis实体类中的属性名和数据库表字段名不一致，有哪些解决方法？

@Select("SELECT id, user_name, user_age FROM user WHERE id = #{id}")
@Results({
  @Result(property = "id", column = "id"),
  @Result(property = "name", column = "user_name"),
  @Result(property = "age", column = "user_age")
})
User getUserById(int id);

<configuration>
  <settings>
    <setting name="mapUnderscoreToCamelCase" value="true"/>
  </settings>
</configuration>

<resultMap id="userResultMap" type="User">
  <result property="id" column="id"/>
  <result property="name" column="user_name"/>
  <result property="age" column="user_age"/>
</resultMap>

<select id="getUserById" resultMap="userResultMap">
  SELECT id, user_name, user_age FROM user WHERE id = #{id}
</select>

<sql id="userColumns">
  id, user_name AS name, user_age AS age
</sql>

<select id="getUserById" resultType="User">
  SELECT <include refid="userColumns"/> FROM user WHERE id = #{id}
</select>

@MappedTypes(Gender.class)
public class GenderTypeHandler implements TypeHandler<Gender> {
    @Override
    public void setParameter(PreparedStatement ps, int i, Gender parameter, JdbcType jdbcType) throws SQLException {
        ps.setInt(i, parameter.getCode());
    }

    @Override
    public Gender getResult(ResultSet rs, String columnName) throws SQLException {
        return Gender.fromCode(rs.getInt(columnName));
    }

    // 实现其他方法...
}

<result property="gender" column="gender" typeHandler="com.example.GenderTypeHandler"/>