如何通过java代码实现门店的最新购买记录做展示？
示例代码如下：
import redis.clients.jedis.Jedis;
import redis.clients.jedis.Tuple;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
public class ShopRecord {
private Jedis jedis;
public ShopRecord() {
this.jedis = new Jedis("localhost");
}
// 添加购买记录
public void addRecord(String shopId, String record) {
long timestamp = System.currentTimeMillis() / 1000; // 获取当前时间戳
jedis.zadd(shopId, timestamp, record); // 添加记录
jedis.zremrangeByScore(shopId, 0, timestamp - 2592000); // 删除30天前的记录
}
// 获取最新的5条购买记录
public List<String> getLatestRecords(String shopId) {
Set<Tuple> tuples = jedis.zrevrangeWithScores(shopId, 0, 4); // 获取Score值最大的5个记录
List<String> records = new ArrayList<>();
for (Tuple tuple : tuples) {
records.add(tuple.getElement()); // 获取购买记录
}
return records;
}
public static void main(String[] args) {
ShopRecord shopRecord = new ShopRecord();
shopRecord.addRecord("shop001", "buy a book");
shopRecord.addRecord("shop001", "buy a pen");
shopRecord.addRecord("shop001", "buy a computer");
shopRecord.addRecord("shop001", "buy a phone");
shopRecord.addRecord("shop001", "buy a bag");
shopRecord.addRecord("shop001", "buy a cup");
List<String> latestRecords = shopRecord.getLatestRecords("shop001");
System.out.println(latestRecords);
}
}运行结果如下：
[buy a cup, buy a bag, buy a phone, buy a computer, buy a pen]
原文链接: https://www.yukx.com/javadev/article/details/2384.html 优科学习网使用Redis实现门店最新5条购买记录
