/**
     * 校驗時間格式為2018-01-02
     * @param time
     * @return
     */
    public boolean validationTimeFormat(String time) {
        boolean bool = false;
        Pattern pattern = Pattern.compile("[0-9]*");
        if(time != null && time.length() == 10) {
            //校驗前四位是否為數字
            if
 
(pattern.matcher(time.substring(0, 4)).matches()) {
                //校驗第五位是-
                if("-".indexOf(time.substring(4, 5))!=-1) {
                    //校驗第6,7位是否為數字
                    if(pattern.matcher(time.substring(5,7)).matches()) {
                        //校驗第8位是否為-
                        if
 
("-".indexOf(time.substring(7, 8))!=-1) {
                            //校驗第9,10位是否為數字
                            if(pattern.matcher(time.substring(8, 10)).matches()) {
                                bool = true;
                            }
                        }
                    }
                }
            }
            
        }
        
 
return bool;
    }

註釋：負數正則表達“^-?[0-9]+”，所有數字正則表示式“-?[0-9]+.?[0-9]+”