本文实例为大家分享了java数据库唯一id生成工具类的具体代码，供大家参考，具体内容如下

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 {}}

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