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Java源码示例：org.apache.ibatis.annotations.MapKey

示例1
private String getMapKey(Method method) {
  String mapKey = null;
  if (Map.class.isAssignableFrom(method.getReturnType())) {
    //如果返回类型是map类型的，查看该method是否有MapKey注解。如果有这个注解，将这个注解的值作为map的key
    final MapKey mapKeyAnnotation = method.getAnnotation(MapKey.class);
    if (mapKeyAnnotation != null) {
      mapKey = mapKeyAnnotation.value();
    }
  }
  return mapKey;
}
示例2
private String getMapKey(Method method) {
  String mapKey = null;
  if (Map.class.isAssignableFrom(method.getReturnType())) {
    //如果返回类型是map类型的，查看该method是否有MapKey注解。如果有这个注解，将这个注解的值作为map的key
    final MapKey mapKeyAnnotation = method.getAnnotation(MapKey.class);
    if (mapKeyAnnotation != null) {
      mapKey = mapKeyAnnotation.value();
    }
  }
  return mapKey;
}
示例3
@Select("select id, name from users")
@MapKey("id")
Map<Integer, User<String>> getAMapOfUsers();
示例4
@Select("select * from person")
@MapKey("id")
Map<Integer, Person> selectAsMap();
示例5
@Select("select id, name from users")
@MapKey("id")
Map<Integer, User<String>> getAMapOfUsers();
示例6
@Select("select * from person")
@MapKey("id")
Map<Integer, Person> selectAsMap();