Java 四舍五入并小数点后保存两位，千分位分隔

import java.text.DecimalFormat;

public class FileTest {
   public static void main(String[] args) {
       DecimalFormat df = new DecimalFormat("#,##0.00");
       System.out.println(df.format(12345.626));
       System.out.println(df.format(12345.6));
   }
}