技術標籤：java

發票管理系統

分為查詢發票、開具發票、刪除發票、待稽核發票、稽核發票五大模組

Scanner scanner = new Scanner(System.in);
        String[] BuyerNameArray = {"胡一","胡二","胡三","胡四"};
        int[] BuyerPhoneArray = {110,120,119,991};
        String[] BuyerAddressArray = {"北京","上海"
 
,"杭州","鄭州"};
        String[] InvoiceStateArray = {"已開票","已開票","已開票","已開票"};
        int num ;
        do {
            System.out.println("********************************");
            System.out.println("-->歡迎進入HPU發票管理系統<--"
 
);
            System.out.println("1.查詢發票");
            System.out.println("2.開具發票");
            System.out.println("3.刪除發票");
            System.out.println("4.發票進入異常狀態");
            System.out.println("5.稽核發票狀態");
            System.out.println(
 
"6.退出系統");
            System.out.println("請按照1-6選擇輸入：");
            num = scanner.nextInt();
            switch (num){
                case 1:
                    System.out.println("-->開始查詢發票");
                    System.out.println("編號\t\t購方名\t購方電話\t購方地址\t發票狀態");
                    for (int i = 0; i < BuyerNameArray.length; i++) {
                        //判斷為空則不輸出
                        if (BuyerNameArray[i]!=null){
                            System.out.println((i+1)+"\t\t"+BuyerNameArray[i]+"\t\t"+BuyerPhoneArray[i]+"\t\t"+BuyerAddressArray[i]+"\t\t"+InvoiceStateArray[i]);
                        }
                    }
                    System.out.println("-->輸入0返回上一級：");
                    num = scanner.nextInt();
                    break;
                case 2:
                    System.out.println("-->提交開具發票");
                    String[] newBuyerNameArray = null;
                    int[] newBuyerPhoneArray = null;
                    String[] newBuyerAddressArray = null;
                    String[] newInvoiceStateArray = null;
                    if (BuyerNameArray[BuyerNameArray.length-1]!=null){
                        //複製老陣列中的資料，並且新陣列長度加1
                        newBuyerNameArray = Arrays.copyOf(BuyerNameArray,BuyerNameArray.length+1);
                        newBuyerPhoneArray =Arrays.copyOf(BuyerPhoneArray,BuyerPhoneArray.length+1);
                        newBuyerAddressArray = Arrays.copyOf(BuyerAddressArray,BuyerAddressArray.length+1);
                        newInvoiceStateArray = Arrays.copyOf(InvoiceStateArray,InvoiceStateArray.length+1);
                        newInvoiceStateArray[newInvoiceStateArray.length-1] = "已開具";
                        int Phone;
                        String Address;
                        //寫入購方姓名
                        System.out.println("請輸入購方姓名：");
                        String Name = scanner.next();
                        newBuyerNameArray[newBuyerNameArray.length-1] = Name;
                        //寫入購方手機號
                        System.out.println("請輸入購方手機號：");
                        Phone = scanner.nextInt();
                        newBuyerPhoneArray[newBuyerPhoneArray.length-1] = Phone;
                        //寫入購方地址
                        System.out.println("請輸入購方地址：");
                        Address = scanner.next();
                        newBuyerAddressArray[newBuyerAddressArray.length-1] = Address;
                        //將新生成的資料地址給初始化的陣列
                        BuyerNameArray = newBuyerNameArray;
                        BuyerPhoneArray = newBuyerPhoneArray;
                        BuyerAddressArray = newBuyerAddressArray;
                        InvoiceStateArray = newInvoiceStateArray;
                        System.out.println(Name+"已經提交成功");
                    }else {
                        //尋找資料中第一個為null的下標
                        int index = 0;
                        for (int i = 0; i < BuyerNameArray.length; i++) {
                            if (BuyerNameArray[i]==null){
                                index = i;
                                break;
                            }
                        }
                        //寫入購方姓名
                        System.out.println("請輸入購方姓名：");
                        String Name = scanner.next();
                        //寫入購方手機號
                        System.out.println("請輸入購方手機號：");
                        int Phone = scanner.nextInt();
                        //寫入購方地址
                        System.out.println("請輸入購方地址：");
                        String Address = scanner.next();
                        BuyerNameArray[index] = Name;
                        BuyerPhoneArray[index] = Phone;
                        BuyerAddressArray[index] = Address;
                        InvoiceStateArray[index] = "已開具";
                        System.out.println(Name+"已經提交成功");
                    }
                    System.out.println("-->輸入0返回上一級：");
                    num = scanner.nextInt();
                    break;
                case 3:
                        System.out.println("-->刪除發票");
                        System.out.println("請輸入要刪除訂單的購方名：");
                        String Name = scanner.next();
                        boolean flag = false;
                        int index = 0;
                        //判斷購方名是否存在
                        for (int i = 0; i < BuyerNameArray.length; i++) {
                            if (Name.equals(BuyerNameArray[i])){
                                flag = true;
                                index = i;
                                break;
                            }
                        }
                        if (flag){
                            //將陣列元素向前移動一位
                            for (int i = index  ; i <BuyerNameArray.length-1 ; i++) {
                                BuyerNameArray[i] = BuyerNameArray[i+1];
                                BuyerPhoneArray[i] = BuyerPhoneArray[i+1];
                                BuyerAddressArray[i] = BuyerAddressArray[i+1];
                                InvoiceStateArray[i] = InvoiceStateArray[i+1];
                            }
                            //若不將陣列中最後一位置空，會導致最後一位還是原來的值
                            BuyerNameArray[BuyerNameArray.length-1] = null;
                            BuyerPhoneArray[BuyerPhoneArray.length-1] = 0;
                            BuyerAddressArray[BuyerAddressArray.length-1] = null;
                            InvoiceStateArray[InvoiceStateArray.length-1] = null;
                            System.out.println("刪除資料成功");

                        }else {
                            System.out.println("此購方名不存在，請輸入0");
                        }
                    System.out.println("-->輸入0返回上一級：");
                    num = scanner.nextInt();
                    break;
                case 4:
                        System.out.println("-->發票進入異常狀態");
                        System.out.println("請輸入要異常訂單的購方名：");
                         Name = scanner.next();
                         flag = false;
                         index = 0;
                        //判斷購方名是否存在
                        for (int i = 0; i < BuyerNameArray.length; i++) {
                            if (Name.equals(BuyerNameArray[i])){
                                flag = true;
                                index = i;
                                break;
                            }
                        }
                        if (flag){
                            //
                            if ("異常".equals(InvoiceStateArray[index])){
                                System.out.println("發票本身就為異常狀態！");
                            }else {
                                InvoiceStateArray[index] = "異常";
                                System.out.println("發票進入異常狀態！");
                            }
                        }else {
                            System.out.println("該訂單不存在！");
                        }
                    System.out.println("-->輸入0返回上一級：");
                    num = scanner.nextInt();
                    break;
                case 5:
                    System.out.println("-->稽核發票");
                    System.out.println("請輸入要稽核異常訂單的購方名：");
                    Name = scanner.next();
                    flag = false;
                    index = 0;
                    //判斷購方名是否存在
                    for (int i = 0; i < BuyerNameArray.length; i++) {
                        if (Name.equals(BuyerNameArray[i])){
                            flag = true;
                            index = i;
                            break;
                        }
                    }
                    if (flag){
                        //
                        if ("已開具".equals(InvoiceStateArray[index])){
                            System.out.println("發票處於已開具狀態！");
                        }else {
                            InvoiceStateArray[index] = "已開具";
                            System.out.println("發票稽核成功，已開具狀態！");
                        }
                    }else {
                        System.out.println("該訂單不存在！");
                    }
                    System.out.println("-->輸入0返回上一級：");
                    num = scanner.nextInt();
                    break;
                case 6:
                    System.out.println("-->推出系統");
                    break;
            }
        }while (num==0);
    

查詢發票：

開具發票：


刪除發票：

進入異常狀態：


稽核異常狀態：

注：此為雛形，後期隨緣改動！