版权声明：小白一枚，敬请指导！ https://blog.csdn.net/super_lu_sir/article/details/86495161
public class Algorithem {
public static void main(String[] args){
double[] xy = Algorithem.trilateration(12641371.971, 4138703.5211, 6, 12641381.9026, 4138706.4714, 6, 12641370.7839, 4138708.7705, 6);
System.out.println(xy[0]+"::"+xy[1]);
}
public static double[] trilateration(double x1,double y1,double d1, double x2, double y2,double d2, double x3, double y3, double d3)
{
double []d={0.0,0.0};
double a11 = 2*(x1-x3);
double a12 = 2*(y1-y3);
double b1 = Math.pow(x1,2)-Math.pow(x3,2) +Math.pow(y1,2)-Math.pow(y3,2) +Math.pow(d3,2)-Math.pow(d1,2);
double a21 = 2*(x2-x3);
double a22 = 2*(y2-y3);
double b2 = Math.pow(x2,2)-Math.pow(x3,2) +Math.pow(y2,2)-Math.pow(y3,2) +Math.pow(d3,2)-Math.pow(d2,2);
d[0]=(b1*a22-a12*b2)/(a11*a22-a12*a21);
d[1]=(a11*b2-b1*a21)/(a11*a22-a12*a21);
return d;
}
}