Generation of serial Number (date + business code + auto-increment sequence)

Project development, the use of two sets of databases, development environment and on-line environment, the database tables are mostly using the self-increment primary key,
Like what:

idintunsigned primary key auto_increment,

But there are often problems, such as:
In the development environment, crawling some data using crawlers, indexing, and then migrating the data to the on-line environment will result in an ID in the index and
The on-line environment database does not have an ID pair, so it is decided to use a string as the primary key.

So here's the question, how do I generate a unique serial number?
Format by: yyyymmdd+ Two-bit business code + 10-bit self-increment sequence,

Like 20150101**99**0000000001.

Ideas:
Getting dates is simple;
The business code is the parameter that the calling service passed in;
Use Redis to save and self-increment the 10-bit self-increment sequence, using the format of the serial.number:{date} to hold the value of the self-increment sequence for a given day;

The main code is as follows:

 Public  interface serialnumberservice {    /** * serial number self-increment sequence */String Serial_number ="Serial.number:";/** * Generates a serial number according to the two-bit business code string, formatted according to the:<br/> * yyyymmdd{bizcode}{10 bit of the self-increment sequence number} * @param Bizcode * Two-bit, 00-99 * @return 20-bit serial number * @throws serviceexception */String Generate (String bizcode)throwsServiceexception;default BooleanIslegal (String bizcode) {if(Bizcode = =NULL|| Bizcode.length ()! =2) {Throw NewRuntimeException ("Bizcode:"+ Bizcode +"Exception"); }if(Character.isdigit (Bizcode.charat (0)) && Character.isdigit (Bizcode.charat (1)))return true;return false; }}@Service Public  class Serialnumberserviceimpl implements serialnumberservice {    @Resource    PrivateRedisdao Redisdao;@Override     PublicStringGenerate(String Bizcode)throwsserviceexception {/** Check the business code * *        BooleanIslegal = Islegal (Bizcode);if(!islegal) {Throw NewServiceexception ("Bizcode parameter is not valid"); }/** Get today's date: YYYYMMDD */String date = Timeutil.gettoday ();/** to construct a redis key * /String key = Serial_number + date;/** Self-increment * /        Longsequence = REDISDAO.INCR (key);        String seq = stringutil.getsequence (sequence); StringBuilder SB =NewStringBuilder ();        Sb.append (date). Append (Bizcode). append (seq); String serial = Sb.tostring ();returnSerial }} Public  class timeutil {    Private Timeutil() {    }/** * Get today's date * * @return  * *     Public StaticStringGettoday() {return "20150101"; }} Public  class stringutil {    Private Stringutil() {    }Static Final intDefault_length =Ten;/** * Get 10-bit serial number, length less than 10 bits, front 0 * * @param seq * @return * *     Public StaticStringgetsequence(LongSEQ) {String str = string.valueof (seq);intLen = Str.length ();if(Len >= default_length) {//Depending on the size of the business, it should not reach ten            returnStr }intrest = Default_length-len; StringBuilder SB =NewStringBuilder (); for(inti =0; I < rest; i++) {Sb.append (' 0 '); } sb.append (str);returnSb.tostring (); }}

Only the Redisdao interface is declared and can be implemented using the Jedis client.

publicinterface RedisDao {    String get(String key);    /**     * 自增,+1,返回增加后的值     *      * @param key     * @return     */    long incr(String key);}

Generation of serial Number (date + business code + auto-increment sequence)