用java自动生成编号，不带重复

public static void main(String[] args) {

// TODO Auto-generated method stub

String k="java";

String a="201805290010";

Date D=new Date();

DateFormat df=new SimpleDateFormat("yyyyMMdd");

String b=df.format(D);

String g=a.substring(0,8);

int data=10001;

int e=data+Integer.parseInt(a.substring(a.length()-4));

String f=String.valueOf(e);

String f1=f.substring(f.length()-4);

System.out.println(k+g+f1);

java201805290011