正文
java代码坐标转平面,java绘制坐标系
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java中怎么将经纬度转换为平面坐标，用的是j
地图Web服务API为开发者提供http接口，即开发者通过http形式发起检索请求，获取返回json或xml格式的检索数据。
用java 发起http请求
用java 解析json/xml数据
应该ok吧
用java编写平面坐标类Point并测试
运行结果：
public class Pointtest {
public static void main(String[] args) {
Point point1 = new Point(0,0);
Point point2 = new Point(5,5);
Point point3 = new Point(5,5);
System.out.println(point1.equals(point2));
System.out.println(point2.equals(point3));
System.out.println(Point.distance(point1,point2));
System.out.println(Point.distance(point1,5,5));
System.out.println(Point.distance(0,0,5,5));
}
}
class Point{
private int x;
private int y;
public Point() {
super();
// TODO Auto-generated constructor stub
}
public Point(int x, int y) {
super();
this.x = x;
this.y = y;
}
public int getX() {
return x;
}
public void setX(int x) {
this.x = x;
}
public int getY() {
return y;
}
public void setY(int y) {
this.y = y;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + x;
result = prime * result + y;
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Point other = (Point) obj;
if (x != other.x)
return false;
if (y != other.y)
return false;
return true;
}
public String toString() {
return "Point [x=" + x + ", y=" + y + "]";
}
public static double distance(int x, int y,int a,int b) {
return Math.sqrt((Math.pow((x-a), 2)+Math.pow((y-b), 2)));
}
public static double distance(Point p,int a,int b) {
return Math.sqrt((Math.pow((p.getX()-a), 2)+Math.pow((p.getY()-b), 2)));
}
public static double distance(Point a,Point b) {
return Math.sqrt((Math.pow((a.getX()-b.getX()), 2)+Math.pow((a.getY()-b.getY()), 2)));
}
}
经纬度转平面坐标系java代码
定一个原点。 定一个比例尺 然后根据点与原点的距离，得到坐标，再通过与原点的坐标比，得到距离，再转成经纬度
