您好,登錄后才能下訂單哦!
本文實(shí)例為大家分享了java數(shù)據(jù)庫唯一id生成工具類的具體代碼,供大家參考,具體內(nèi)容如下
import java.io.File; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Map; import java.util.Random; import java.util.UUID; import org.springframework.dao.EmptyResultDataAccessException; import org.springframework.jdbc.core.JdbcTemplate; public class UniqueIdUtil { private static long adjust = 1L; private static long nextId = 0L; private static long lastId = -1L; private static long randomLeng = 6L; private static JdbcTemplate jdbcTemplate; private static SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMddHHmmss"); private static void init() { try { jdbcTemplate = (JdbcTemplate)AppUtil.getBean("jdbcTemplateSN"); String str2 = AppConfigUtil.get("genId.adjust"); if (str2 != null) { adjust = Integer.parseInt(str2); } } catch (Exception localException) { adjust = 1L; String str3 = AppConfigUtil.get("genId.adjust"); if (str3 != null) { adjust = Integer.parseInt(str3); } } } private static void getNextIdBlock() { if (jdbcTemplate == null) { init(); } Long localLong = Long.valueOf(-1L); Integer localInteger = Integer.valueOf(-1); String str1 = "SELECT bound,incremental FROM SYS_DB_ID T WHERE T.ID=?"; String str2 = "UPDATE SYS_DB_ID SET BOUND=? WHERE ID=?"; try { Map localMap = jdbcTemplate.queryForMap(str1, new Object[] { Long.valueOf(adjust) }); localLong = Long.valueOf(Long.parseLong(localMap.get("bound").toString())); localInteger = Integer.valueOf(Integer.parseInt(localMap.get("incremental").toString())); nextId = localLong.longValue(); lastId = localLong.longValue() + localInteger.intValue(); jdbcTemplate.update(str2, new Object[] { Long.valueOf(lastId), Long.valueOf(adjust) }); } catch (EmptyResultDataAccessException localEmptyResultDataAccessException) { insertNewComputer(); } } private static void insertNewComputer() { try { lastId = 10000L; String str = "INSERT INTO SYS_DB_ID (id,incremental,bound) VALUES(" + adjust + ",10000," + lastId + ")"; jdbcTemplate.update(str); } catch (Exception localException) { localException.printStackTrace(); } } public static synchronized long genId() { if (lastId <= nextId) { getNextIdBlock(); } long l = nextId++; return l + adjust * 10000000000000L; } public static final String getGuid() { UUID localUUID = UUID.randomUUID(); return localUUID.toString(); } public static final String getRandom() { Random localRandom = new Random(); String str1 = ""; for (int i = 0; i < randomLeng; i++) { String str2 = String.valueOf(localRandom.nextInt(10)); str1 = str1 + str2; } return str1; } public static String genOrderNo() { long l = genId(); String str = dateFormat.format(new Date()); return str + l; } public static void main(String[] paramArrayOfString) throws Exception {} }
以上就是本文的全部?jī)?nèi)容,希望對(duì)大家的學(xué)習(xí)有所幫助,也希望大家多多支持億速云。
免責(zé)聲明:本站發(fā)布的內(nèi)容(圖片、視頻和文字)以原創(chuàng)、轉(zhuǎn)載和分享為主,文章觀點(diǎn)不代表本網(wǎng)站立場(chǎng),如果涉及侵權(quán)請(qǐng)聯(lián)系站長(zhǎng)郵箱:is@yisu.com進(jìn)行舉報(bào),并提供相關(guān)證據(jù),一經(jīng)查實(shí),將立刻刪除涉嫌侵權(quán)內(nèi)容。