今天遇到个需求,需要从0000001开始计数,代码如下:
public class phone { public static void main(String[] args) throws IOException { FileWriter writer = new FileWriter(new File("C:\\Users\\mohe\\Desktop\\1.csv")); // int str =1000000; int aa=1; System.out.println(); for (int i =0;i<=5000000;i++){ int a=aa+i; writer.write(new DecimalFormat("0000000").format(a)+"\n"); //格式化数字位数,缺的自动补全0后写入文件里,“\n”是换行符 } writer.close(); } }