Question

我有2个文件如下：

1.txt
first|second|third
fourth|fifth|sixth

2.txt
first1|second1|third1
fourth1|fifth1|sixth1

现在我想加入他们：

first|first1|second1|third1|second|third
fourth|fourth1|fifth1|sixth1|fifth|sixth

我尝试使用扫描仪但无法加入它们。任何建议。

Scanner scanner = new Scanner(new File(("F:\\1.txt")));
Scanner scanner2 = new Scanner(new File(("F:\\2.txt")));

while(scanner.hasNext()) {
   while(scanner2.hasNext()) {
   system.out.println(scanner.next() + "|" + scanner2.next() + "|");
}

//输出

first|second|third|first1|second1|third1|
fourth|fifth|sixth|fourth1|fifth1|sixth1|

Answer 1

    Scanner scanner = new Scanner(new File(("F:\\1.txt")));
    Scanner scanner2 = new Scanner(new File(("F:\\2.txt")));
    String[] line1, line2, res;
            while (scanner.hasNext() && scanner2.hasNext()) {
                line1 = scanner.next().split("\\|");
                line2 = scanner2.next().split("\\|");
                int len = Math.min(line1.length,line2.length);
                res= new String[line1.length + line2.length];
                for(int index = 0, counter = 0; index < len; index++){
                    res[counter++] = line1[index];
                    res[counter++] = line2[index];
                }
                if(line1.length > line2.length){
                    for(int jIndex = 2*line2.length, counter = 0;jIndex < (line1.length+line2.length);jIndex++  ){
                        res[jIndex] = line1[line2.length + (counter++)];
                    }
                }else if(line2.length > line1.length){
                    for(int jIndex = 2*line1.length, counter = 0;jIndex < (line1.length+line2.length);jIndex++  ){
                        res[jIndex] = line2[line1.length + (counter++)];
                    }
                }
                String result = Arrays.asList(res).toString().replaceAll("(^\\[|\\]$)", "").replace(", ", "|");
                System.out.println(result);
            }
            scanner.close();
            scanner2.close();

如果两行包含相同数量的令牌，您可以放弃if条件

这将输出为，

first|first1|second|second1|third|third1
fourth|fourth1|fifth|fifth1|sixth|sixth1

和

String[] line1, line2, res;
            while (scanner.hasNext() && scanner2.hasNext()) {
                line1 = scanner.next().split("\\|");
                line2 = scanner2.next().split("\\|");
                res= new String[line1.length + line2.length];
                int counter = 0;
                res[counter++] = line1[0];
                for(int index = 0; index < line2.length; index++){
                    res[counter++] = line2[index];
                }
                for(int index = 1; index < line1.length; index++){
                    res[counter++] = line1[index];
                }
                String result = Arrays.asList(res).toString().replaceAll("(^\\[|\\]$)", "").replace(", ", "|");
                System.out.println(result);
            }
            scanner.close();
            scanner2.close();

将输出

first|first1|second1|third1|second|third
fourth|fourth1|fifth1|sixth1|fifth|sixth

使用扫描仪连接文件

1 个答案: