读取远程Excel文件

Question

I have an Excel file that looks like this:

What I'm trying to do now is supply the DEST_NAME_DISPLAY and retrieve the DEST_ID.

As you might have noticed, this file contains a lot of destination, so I don't want to loop over them all to find a DEST_ID. Is this possible? If it is, how?

Answer 1

Since the file rarely changes you can read it into a Map.

For example like this: How to group the values which are in excel to a HashMap

Afterwards, you can get the value like this:

Map<String, Integer> map = ... // from file
Integer value = map.get(key);

Edit: BackSlash points out, a database is better because the data will remain after the application quits. Of course it is a little harder to set up, but worth considering if you need persistance.

Answer 2

In java8 you can use the functional programming features to get it done.Following is the psuedo code written in javascript.

var myColumnDefs = [
    {key:"Tokyo", value:"2211"},
    {key:"Akihabara", value:"2211"},
    {key:"Kyoto",value:"3344"}]
var input = "Kyoto"
var p = myColumnDefs.filter(function(x){ return x.key==input }).map(function(x){return x.value});
alert(p);

The following is the longer version which is written in Java 8

import java.util.Arrays;
class Location{
    public String areaCode;
    public String areaName;
    public String otherInfo;

    public Location(String areaName,String areaCode,String otherInfo){
        this.areaCode = areaCode;
        this.areaName = areaName;
        this.otherInfo = otherInfo;
    }

}
public class Main {

  public static void main(String[] args) {
    Location[] locations = {
        new Location("Tokyo","2211","TK"),
        new Location("Akihabara","2211","AHR"),
        new Location("Kyoto","3344","KT")
    };
    String input = "Tokyo";
    Location[] output =(Location[]) Arrays.stream(locations).filter(x->x.areaName.equals(input)).toArray(size -> new Location[size]);

    System.out.println(output[0].areaCode);


  }
}