Question

我是Java语言的新手，我有一个项目要做。我需要一些帮助来完成我的任务，这并不难，但我真的不明白。我拥有这个XML文件

<LOCATION_PROPERTIES NAME="STN10">
       <LOCATION ID="10" TYPE="P+D" X="52380" Y="24020" ANGLE="90" PICK_BANK="2" PICK_TABLE="10" PICK_MOD="0" PICK_DRV="N->P" DROP_BANK="2" DROP_TABLE="11" DROP_MOD="0" DROP_DRV="N->P"/>
   <SEGMENT_PROPERTIES>
       <NEXT_LOCATION NAME="X535" BANK="3" TABLE="127" MOD="0" DRV="P->P" INITIAL_SPEED="600" SPEED="504" LENGTH="8052" STOP="CS"/>
   </SEGMENT_PROPERTIES>
</LOCATION_PROPERTIES>

<LOCATION_PROPERTIES NAME="STN11">
      <LOCATION ID="11" TYPE="P+D" X="53280" Y="24020" ANGLE="90" PICK_BANK="2" PICK_TABLE="10" PICK_MOD="0" PICK_DRV="N->P" DROP_BANK="2" DROP_TABLE="11" DROP_MOD="0" DROP_DRV="N->P"/>
   <SEGMENT_PROPERTIES>
      <NEXT_LOCATION NAME="X535" BANK="3" TABLE="58" MOD="0" DRV="P->P" INITIAL_SPEED="600" SPEED="502" LENGTH="7893" STOP="CS"/>
   </SEGMENT_PROPERTIES>
</LOCATION_PROPERTIES>

<LOCATION_PROPERTIES NAME="STN12">
      <LOCATION ID="12" TYPE="P+D" X="54180" Y="24020" ANGLE="90" PICK_BANK="2" PICK_TABLE="10" PICK_MOD="0" PICK_DRV="N->P" DROP_BANK="2" DROP_TABLE="11" DROP_MOD="0" DROP_DRV="N->P"/>
   <SEGMENT_PROPERTIES>
      <NEXT_LOCATION NAME="X534" BANK="3" TABLE="59" MOD="0" DRV="P->P" INITIAL_SPEED="600" SPEED="600" LENGTH="4267" STOP="CS"/>
   </SEGMENT_PROPERTIES>
 </LOCATION_PROPERTIES>

 <LOCATION_PROPERTIES NAME="X535">
    <LOCATION ID="535" TYPE="MOVE" X="54090" Y="33800" ANGLE="90"/>
  <SEGMENT_PROPERTIES>
    <NEXT_LOCATION NAME="X536" BANK="1" TABLE="88" MOD="0" DRV="P->P" INITIAL_SPEED="1200" SPEED="1200" LENGTH="3013" STOP="CS"/>
    <NEXT_LOCATION NAME="STN19" BANK="2" TABLE="65" MOD="0" DRV="P->N" INITIAL_SPEED="1043" SPEED="468" LENGTH="5438" STOP="CS"/>
    <NEXT_LOCATION NAME="STN20" BANK="2" TABLE="66" MOD="0" DRV="P->N" INITIAL_SPEED="1200" SPEED="513" LENGTH="6338" STOP="CS"/>
    <NEXT_LOCATION NAME="STN22" BANK="2" TABLE="198" MOD="0" DRV="P->N" INITIAL_SPEED="1200" SPEED="587" LENGTH="8138" STOP="CS"/>
    <NEXT_LOCATION NAME="STN21" BANK="2" TABLE="67" MOD="0" DRV="P->N" INITIAL_SPEED="1200" SPEED="552" LENGTH="7238" STOP="CS"/>
   </SEGMENT_PROPERTIES>
 </LOCATION_PROPERTIES>

我成功地向所有下一个地点展示了所有车站和时间。它给了我：

出发站：STN10。抵达：X535 ---时间：16秒

出发站：STN11 抵达：X535 ---时间：16秒

... //等等，很多

出发站：X535 抵达：X536 ---时间：2秒抵达：STN19 ---时间：12秒抵达：STN20 ---到达时间：12秒 ...... //等

我需要做的是显示从一个站到另一个站的时间。有点像这样：

出发站：STN10 抵达：X535 ---时间：16秒抵达：X536 ---时间：2秒到货：X537 --- ...... 到货：STN26 ---总时间：...... ...... //等

但是现在我有点陷入困境，我认为我必须以递归方式进行，但我不知道如何继续。

目前，这是我的java代码，但我需要创建更多我认为的函数。

public static int onestep4all()
{
    //int cpt = 0;
    int timeonestep = 0;
    List <Element> location_properties = root.getChildren("LOCATION_PROPERTIES");
    for (Element loc :  location_properties)
    {
        if(loc.getAttributeValue("NAME").startsWith("STN")== true)
        {
            System.out.println("-------------------------------------------------");
            System.out.println("            Departure Station : "+loc.getAttributeValue("NAME"));
            List <Element> segment_properties = loc.getChildren("SEGMENT_PROPERTIES");
            for (Element seg : segment_properties)
            {
                List <Element> next_location = seg.getChildren("NEXT_LOCATION");
                for (Element next: next_location)
                {
                    System.out.print("Arrival : " +next.getAttributeValue("NAME"));
                    int L = Integer.parseInt(next.getAttributeValue("LENGTH"));
                    int S = Integer.parseInt(next.getAttributeValue("SPEED"));
                    timeonestep = L/S;
                    System.out.println("  ---  Time to go : "+timeonestep+" seconds");                                
                }
            }
        }
    }
    return timeonestep;
}

谢谢大家的帮助。

XML和Java简单的任务

0 个答案: