MapKey · mybatis源码解析

~~~ /** * Copyright 2009-2019 the original author or authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.ibatis.annotations; import java.lang.annotation.Documented; import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.annotation.Target; /** * The annotation that specify the property name(or column name) for a key value of {@link java.util.Map}. * * <p><br> * <b>How to use:</b> * <pre> * public interface UserMapper { * @MapKey("id") * @Select("SELECT id, name FROM users WHERE name LIKE #{name} || '%") * Map<Integer, User> selectByStartingWithName(String name); * } * </pre> * @author Clinton Begin */ @Documented @Retention(RetentionPolicy.RUNTIME) @Target(ElementType.METHOD) public @interface MapKey { /** * Returns the property name(or column name) for a key value of {@link java.util.Map}. * * @return the property name(or column name) */ String value(); } ~~~