向 ArrayList 添加元素
add elements to the ArrayList
我试图将请求的地理坐标存储在 ArrayList 中,以检查它们中的一些是否位于同一个外接圆中,但在每次请求后只是将一个元素添加到列表中!我如何管理它以在每次调用请求后将所有元素添加到 ArrayList?
接收者class:
import java.util.ArrayList;
import java.util.List;
import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
@Path("/test")
public class Receiver {
private ArrayList<LatLong> latLongList;
@POST
@Consumes(MediaType.APPLICATION_JSON)
public Response storeData(Data data) {
String macD = data.getMac();
int routeD = data.getRoute();
float latD = data.getLatitude();
float longD = data.getLongitude();
latLongList = new ArrayList<>();
latLongList.add(new LatLong(latD, longD));
System.out.println("latLondList size: " + latLongList.size());
Database db = new Database();
db.insertData(macD, routeD, latD, longD);
return Response.status(201).build();
}
}
数据class:
@Provider
public class Data {
private String mac;
private int route;
private float latitude;
private float longitude;
//getter setter constructor.
}
经纬度class:
public class LatLong {
float latitude;
float longitude;
//getter setter constructor.
}
试试这个:
public class Receiver {
private static ArrayList<LatLong> latLongList = new ArrayList<>();
@POST
@Consumes(MediaType.APPLICATION_JSON)
public Response storeData(Data data) {
String macD = data.getMac();
int routeD = data.getRoute();
float latD = data.getLatitude();
float longD = data.getLongitude();
latLongList.add(new LatLong(latD, longD));
System.out.println("latLondList size: " + latLongList.size());
Database db = new Database();
db.insertData(macD, routeD, latD, longD);
return Response.status(201).build();
}
}
编辑: 删除了第二个 latLongList
变量。
我试图将请求的地理坐标存储在 ArrayList 中,以检查它们中的一些是否位于同一个外接圆中,但在每次请求后只是将一个元素添加到列表中!我如何管理它以在每次调用请求后将所有元素添加到 ArrayList?
接收者class:
import java.util.ArrayList;
import java.util.List;
import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
@Path("/test")
public class Receiver {
private ArrayList<LatLong> latLongList;
@POST
@Consumes(MediaType.APPLICATION_JSON)
public Response storeData(Data data) {
String macD = data.getMac();
int routeD = data.getRoute();
float latD = data.getLatitude();
float longD = data.getLongitude();
latLongList = new ArrayList<>();
latLongList.add(new LatLong(latD, longD));
System.out.println("latLondList size: " + latLongList.size());
Database db = new Database();
db.insertData(macD, routeD, latD, longD);
return Response.status(201).build();
}
}
数据class:
@Provider
public class Data {
private String mac;
private int route;
private float latitude;
private float longitude;
//getter setter constructor.
}
经纬度class:
public class LatLong {
float latitude;
float longitude;
//getter setter constructor.
}
试试这个:
public class Receiver {
private static ArrayList<LatLong> latLongList = new ArrayList<>();
@POST
@Consumes(MediaType.APPLICATION_JSON)
public Response storeData(Data data) {
String macD = data.getMac();
int routeD = data.getRoute();
float latD = data.getLatitude();
float longD = data.getLongitude();
latLongList.add(new LatLong(latD, longD));
System.out.println("latLondList size: " + latLongList.size());
Database db = new Database();
db.insertData(macD, routeD, latD, longD);
return Response.status(201).build();
}
}
编辑: 删除了第二个 latLongList
变量。