1.編寫lua腳本用于生成主鍵ID序列號,內容如下

local key = tostring(KEYS[1]); local count = tonumber(KEYS[2]); local dateStr = tostring(KEYS[3]);local newKey = key .. "_" .. dateStr; local numRedis = redis.call("incr", newKey); print(numRedis);if (numRedis == 1) thenredis.call("expire",newKey,60); end-- 計算數字的位數 local function DightNum(num)if math.floor(num) ~= num or num < 0 thenreturn -1;elseif 0 == num thenreturn 1;elselocal tmp_dight = 0;while num > 0 donum = math.floor(num/10);tmp_dight = tmp_dight + 1;endreturn tmp_dight;end end-- 在整數數字前面加0 -- dest_dight 標識最終生成位數，例如 AddZeroFrontNum(5, 1) 計算后是00001 local function AddZeroFrontNum(dest_dight, num)local num_dight = DightNum(num);if -1 == num_dight thenreturn -1;elseif dest_dight <= num_dight thenreturn tostring(num);elselocal str_e = ""for var =1, dest_dight - num_dight dostr_e = str_e .. "0";endreturn str_e .. tostring(num);end endlocal idStr = AddZeroFrontNum(count, numRedis); return dateStr .. idStr;

2.redis加載lua腳本文件

redis-cli -a redis script load "$(cat getGenerateId.lua)" "b3d58fe8b47b1ca1e1fb074db5c3506a09ffdae8"

-a: redis密碼，如果沒有密碼，該項不需要輸入
下面的字符串即為加載后redis保存的sha值，通過該sha值可以訪問lua腳本

3.java代碼執行緩存的lua腳本文件

import org.springframework.beans.factory.annotation.Autowired; import org.springframework.dao.DataAccessException; import org.springframework.data.redis.connection.RedisConnection; import org.springframework.data.redis.core.RedisCallback; import org.springframework.data.redis.core.RedisTemplate; import org.springframework.stereotype.Service; import redis.clients.jedis.Jedis;import java.text.DateFormat; import java.text.NumberFormat; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Calendar; import java.util.GregorianCalendar; import java.util.List; @Service public class RedisService {private static final DateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");@Autowiredprivate RedisTemplate<String, String> redisTemplate;public Object executeScript(final String sha, final List<String> keys, final ArrayList<String> vals) {return redisTemplate.execute(new RedisCallback() {@Overridepublic Object doInRedis(RedisConnection connection) throws DataAccessException {Jedis jedis = (Jedis) connection.getNativeConnection();return jedis.evalsha(sha, keys, vals);}}, true);}/*** 每秒從 1 開始生成唯一標識，包括時間戳：yyyyMMddHHmmss* 最終格式為：yyyyMMddHHmmss + 四位有序數字* @param sha redis中生成lua腳本的序列號* @param key redis中存放id的key前綴* @param length 后面生成有序數字的位數* @return*/public Long fetchUUID(String sha, String key, String length){List<String> keys = new ArrayList<>();keys.add(key);keys.add(length);Calendar now = new GregorianCalendar();String datetime = df.format(now.getTime());keys.add(datetime);Object obj = executeScript(sha, keys, new ArrayList<String>());return Long.parseLong(String.valueOf(obj));} }

然后調用fetchUUID該方法就可以了，key和length自定義，sha為第二步生成值

轉載于:https://www.cnblogs.com/alan319/p/10600641.html

總結

以上是生活随笔為你收集整理的java+redis+lua生成自动增长的ID序列号的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。