java数据库唯一id生成工具类
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
importjava.io.File;
importjava.text.SimpleDateFormat;
importjava.util.Date;
importjava.util.Map;
importjava.util.Random;
importjava.util.UUID;
importorg.springframework.dao.EmptyResultDataAccessException;
importorg.springframework.jdbc.core.JdbcTemplate;
publicclassUniqueIdUtil
{
privatestaticlongadjust=1L;
privatestaticlongnextId=0L;
privatestaticlonglastId=-1L;
privatestaticlongrandomLeng=6L;
privatestaticJdbcTemplatejdbcTemplate;
privatestaticSimpleDateFormatdateFormat=newSimpleDateFormat("yyyyMMddHHmmss");
privatestaticvoidinit()
{
try
{
jdbcTemplate=(JdbcTemplate)AppUtil.getBean("jdbcTemplateSN");
Stringstr2=AppConfigUtil.get("genId.adjust");
if(str2!=null){
adjust=Integer.parseInt(str2);
}
}
catch(ExceptionlocalException)
{
adjust=1L;
Stringstr3=AppConfigUtil.get("genId.adjust");
if(str3!=null){
adjust=Integer.parseInt(str3);
}
}
}
privatestaticvoidgetNextIdBlock()
{
if(jdbcTemplate==null){
init();
}
LonglocalLong=Long.valueOf(-1L);
IntegerlocalInteger=Integer.valueOf(-1);
Stringstr1="SELECTbound,incrementalFROMSYS_DB_IDTWHERET.ID=?";
Stringstr2="UPDATESYS_DB_IDSETBOUND=?WHEREID=?";
try
{
MaplocalMap=jdbcTemplate.queryForMap(str1,newObject[]{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,newObject[]{Long.valueOf(lastId),Long.valueOf(adjust)});
}
catch(EmptyResultDataAccessExceptionlocalEmptyResultDataAccessException)
{
insertNewComputer();
}
}
privatestaticvoidinsertNewComputer()
{
try
{
lastId=10000L;
Stringstr="INSERTINTOSYS_DB_ID(id,incremental,bound)VALUES("+adjust+",10000,"+lastId+")";
jdbcTemplate.update(str);
}
catch(ExceptionlocalException)
{
localException.printStackTrace();
}
}
publicstaticsynchronizedlonggenId()
{
if(lastId<=nextId){
getNextIdBlock();
}
longl=nextId++;
returnl+adjust*10000000000000L;
}
publicstaticfinalStringgetGuid()
{
UUIDlocalUUID=UUID.randomUUID();
returnlocalUUID.toString();
}
publicstaticfinalStringgetRandom()
{
RandomlocalRandom=newRandom();
Stringstr1="";
for(inti=0;i
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。