手动生成32位id的帮助类（二）

public class PrimarykeyUtil {
    
    private static int ext=100;

    public static synchronized String getPrimaryId(){
        SimpleDateFormat sdf =new SimpleDateFormat("yyyyMMddHHmmssSSS");
        String orderid = sdf.format(new Date());
        if(ext >999){
            ext = 100;
        } else {
            ext++;
        }
        String rand ="";
        for(int i=0;i<10;i++){
            Random rm = new Random();
            rand +=rm.nextInt(10);
        }
        return orderid + ext + rand;
    }
    
    
    public static synchronized String getPrimaryId(String prefix){
        SimpleDateFormat sdf =new SimpleDateFormat("yyyyMMddHHmmssSSS");
        String orderid = sdf.format(new Date());
        if(ext >999){
            ext = 100;
        } else {
            ext++;
        }
        String rand ="";
        for(int i=0;i<10;i++){
            Random rm = new Random();
            rand +=rm.nextInt(10);
        }
        return prefix+"_"+orderid + ext + rand;
    }
    
    public static void main(String[] args) {
        System.out.println(getPrimaryId("menu"));
    }
    
    public static synchronized String getFileDirectory(){
        SimpleDateFormat formats =new SimpleDateFormat("yyyyMMddHHmmssSSS");
        return formats.format(new Date());
    }
    
    
    /**
     * 创建模板页面ID
     * @param templatePageID
     * @return
     */
    public static String createTemplatePageID(String templatePageID)
    {
        String newPageId = null;
        try {
            if(templatePageID != null){
                String []temp = templatePageID.split("-");
                DecimalFormat decimalFormat = new DecimalFormat("00");
                long number = (Long) decimalFormat.parse(temp[1]);
                number++;
                newPageId = decimalFormat.format(number);
            }else{
                newPageId = "01";
            }
        } catch (Exception e) {
            throw new  RuntimeException(e.getMessage());
        }
        return newPageId;
    }
    

}