三维计算三角形边角

import java.math.BigDecimal;import java.util.ArrayList;import java.util.Arrays;import java.util.List;class XYZ{private String X;private String Y;private String Z;public String getX() {return X;}public void setX(String x) {X = x;}public String getY() {return Y;}public void setY(String y) {Y = y;}public String getZ() {return Z;}public void setZ(String z) {Z = z;}}public class Calum {@SuppressWarnings("unchecked")public List getData(String[] XYZ){ //坐标格式为x,y,z字符串如1,2,3List list=new ArrayList();List line=new ArrayList();//储存边长for(int i=0;i<XYZ.length;i++){XYZ xyz=new XYZ();xyz.setX( XYZ[i].split(",")[0]);xyz.setY( XYZ[i].split(",")[1]);xyz.setZ( XYZ[i].split(",")[2]);list.add(xyz);}if(list.size()>1){for(int i=0;i<list.size();i++){XYZ xyz=(XYZ) list.get(i);XYZ xyz2;if(i==list.size()-1){xyz=(XYZ) list.get(0);xyz2=(XYZ) list.get(i);}else {xyz2=(XYZ) list.get(i+1);}Stringx=subData(xyz.getX(),xyz2.getX());Stringy=subData(xyz.getY(),xyz2.getY());Stringz=subData(xyz.getZ(),xyz2.getZ());Double linedot=addData(x, y, z);line.add(Math.sqrt(linedot));}}return line;}public String subData(String data,String data1){BigDecimal big=new BigDecimal(data);BigDecimal big2=new BigDecimal(data1);BigDecimal big3=big.subtract(big2);//差值return big3.multiply(big3).toString();//返回差值的平方}public String subData2(String data,String data1){BigDecimal big=new BigDecimal(data);BigDecimal big2=new BigDecimal(data1);return big.subtract(big2).toString();//返回差值}public String mutilData(String data,String data1){BigDecimal big=new BigDecimal(data);BigDecimal big2=new BigDecimal(data1);return big.multiply(big2).toString();//返回平方}public String divideData(String data,String data1){BigDecimal big=new BigDecimal(data);BigDecimal big2=new BigDecimal(data1);return big.divide(big2,5).toString();//返回商}public String addsubData(String data,String data1,String data2){//三角形(a2+b2-c2）值BigDecimal big=new BigDecimal(data);BigDecimal big2=new BigDecimal(data1);BigDecimal big3=new BigDecimal(data2);//差值returnbig.add(big2).subtract(big3).toString();}public Double addData(String data,Stringdata1,String data2){BigDecimal big=new BigDecimal(data);BigDecimal big2=new BigDecimal(data1);BigDecimal big3=new BigDecimal(data2);returnbig.add(big2).add(big3).doubleValue();//返回和}@SuppressWarnings("unchecked")public Double acos(String a,String b,String c){String a2=mutilData(a, a);String b2=mutilData(b, b);String c2=mutilData(c, c);String ab=mutilData(a,b);ab=mutilData(ab, "2");String result=divideData(addsubData(a2, b2, c2), ab);Doubleangle=Math.acos(Double.parseDouble(result))* 180/Math.PI;return angle;}public String angle(List line){String result="";if(line.size()==3){//三角形计算各个角度String a=line.get(0).toString();String b=line.get(1).toString();String c=line.get(2).toString();Double C=acos(a, b, c);Double B=acos(a, c, b);Double A=acos(c, b,a);System.out.println("边长"+a+"对应的角度为"+A.toString()+",边长"+b+"对应的角度为"+B.toString());System.out.println("边长"+c+"对应角度为"+C.toString());result=A.toString()+"-"+B.toString()+"-"+C .toString();//海伦-秦九韶公式:S=√[p(p-a)(p-b)(p-c)],//其中p=(a+b+c)/2求三角形面积String p=divideData(addData(a, b, c).toString(),"2");String p1=subData2(p, a);String p2=subData2(p, b);String p3=subData2(p, c);Strings=mutilData(mutilData(mutilData(p,p1),p2),p3);s=Math.sqrt(Double.parseDouble(s))+"";System.out.println("面积为"+s);String aline=divideData(mutilData(s, "2"),a);String bline=divideData(mutilData(s, "2"),b);String cline=divideData(mutilData(s, "2"),c);System.out.println("边长"+a+"对应的高为"+aline+",边长"+b+"对应的高为"+bline+",边长"+c+"对应的高为"+cline);}//Math.acos(a);return result;}public static void main(String[] args) { String[] XYZ={"1,4,3","1,2,6","1,6,6"};System.out.println("扫描仪传入的三个坐标是"+Arrays.toString(XYZ));List line= new Calum().getData(XYZ);//根据传入的坐标计算获取三角形三条边System.out.println("三角形边长分别为"+line.toString());new Calum().angle(line);}}。