1、list到Id唯一确定的map,map的KEY是LeadClient中的ContactId
Map<Long, LeadClient> clientLevelMap = Maps.uniqueIndex(leadClients, new Function<LeadClient, Long>() {
public Long apply(LeadClient leadClient) {
return leadClient.getContactId();
}
});
2、list到多个id的列表，key也来自LeadClient
ImmutableListMultimap<Long, OrderItem> orderItemMap = Multimaps.index(orderItems, new Function<OrderItem, Long>(){
public Long apply(OrderItem orderItem){
return orderItem.getOrderId();
}
});
