# 20192324 2020-2021-1 《資料結構與面向物件程式設計》實驗四報告
課程:《程式設計與資料結構》
班級: 1923
姓名: 夏馨
學號:20192324
實驗教師:王志強
實驗日期:2020年10月26日
必修/選修: 必修
1.實驗內容
(一)Java Socket程式設計
1.學習藍墨雲上教材《Java和Android程式設計》“第16章 輸入/輸出 ”和“第22章 網路”,學習JavaSocket程式設計
2.結對程式設計。結對夥伴A編寫客戶端SocketClient.java,結對夥伴B編寫伺服器端。
3.截圖加學號水印上傳藍墨雲,程式碼push到碼雲,並撰寫實驗報告。
(二)Java和密碼學
參考 http://www.cnblogs.com/rocedu/p/6683948.html
以結對的方式完成Java密碼學相關內容的學習(帖子中所有程式碼和相關知識點需要學習)。提交學習成果碼雲連結和代表性成果截圖,要有學號水印。
(三)編寫有理數/複數計算器
結對程式設計,結對夥伴A編寫有理數計算器。結對夥伴B編寫複數計算器。截圖加水印上傳藍墨雲,程式碼push碼雲。
(四)遠端有理數計算器
結對程式設計,結對夥伴A程式設計實現客戶端,結果夥伴B實現伺服器端。
客戶端通過鍵盤輸入一個有理數計算的公式(例如:1/4 + 1/6 = ),並把該公式以字串的形式傳送給夥伴B(伺服器端),伺服器端根據字串計算出結果為5/12,並把結果返回給客戶端A,A收到結果後輸出結果。截圖加水印上傳藍墨雲,程式碼push碼雲。
(五)遠端複數計算器
結對程式設計,結對夥伴B程式設計實現客戶端,結果夥伴A實現伺服器端。
客戶端通過鍵盤輸入一個有理數計算的公式(例如:1/4 + 1/6 = ),並把該公式以字串的形式傳送給夥伴A(伺服器端),伺服器端根據字串計算出結果為5/12,並把結果返回給客戶端B,B收到結果後輸出結果。截圖加水印上傳藍墨雲,程式碼push碼雲。
注意實驗四(4)和實驗四(5),一個人不能僅實現客戶端,必須實現一個客戶端和伺服器,否則兩個實驗均不得分!!!
2. 實驗過程及結果
(1)Java Socket程式設計
-
伺服器
import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;public class Servertest { public static void main(String[] args) throws IOException { //1.建立一個伺服器Socket(ServerSocket)繫結指定埠 ServerSocket serverSocket=new ServerSocket(1234); //2.使用accept()方法阻止等待監聽,獲得新連線 Socket socket=serverSocket.accept(); //3.獲得輸入流 InputStream inputStream=socket.getInputStream(); BufferedReader bufferedReader=new BufferedReader(new InputStreamReader(inputStream)); //獲得輸出流 OutputStream outputStream=socket.getOutputStream(); PrintWriter printWriter=new PrintWriter(outputStream); //4.讀取使用者輸入資訊 String info=null; System.out.println("伺服器已經建立......"); while(!((info = bufferedReader.readLine()) ==null)){ System.out.println("實驗真的好難啊!!!!!:" + info); } //給客戶一個響應 String reply="Ture!!!"; printWriter.write(reply); printWriter.flush(); //5.關閉資源 printWriter.close(); outputStream.close(); bufferedReader.close(); inputStream.close(); socket.close(); serverSocket.close();
}
} -
客戶端
import java.io.*;
import java.net.Socket;public class SocketClient { public static void main(String[] args) throws IOException { //1.建立客戶端Socket連線,指定伺服器位置和埠 Socket socket = new Socket("192.168.56.1",8800); // Socket socket = new Socket("192.168.43.55",8800); //2.得到socket讀寫流 OutputStream outputStream = socket.getOutputStream(); PrintWriter printWriter = new PrintWriter(outputStream); OutputStreamWriter outputStreamWriter = new OutputStreamWriter(outputStream); //輸入流 InputStream inputStream = socket.getInputStream(); BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream,"UTF-8")); //3.利用流按照一定的操作,對socket進行讀寫操作 String info1 = " 使用者名稱:Billy,密碼:123456"; String info = new String(info1.getBytes("GBK"),"utf-8"); printWriter.write(info); printWriter.flush(); outputStreamWriter.write(info1); outputStreamWriter.flush(); socket.shutdownOutput(); //接收伺服器的響應 String reply = null; while (!((reply = bufferedReader.readLine()) ==null)){ System.out.println("接收伺服器的資訊為:" + reply); } //4.關閉資源 bufferedReader.close(); inputStream.close(); outputStreamWriter.close(); //printWriter.close(); outputStream.close(); socket.close();
}
} -
執行結果
(二)JAVA和密碼學
(三)編寫有理數/複數計算器
- 建立分數類
import java.util.StringTokenizer;
public class Fraction {
int fenzi,fenmu;
char ch;
public Fraction(String str) {
StringTokenizer st=new StringTokenizer(str,"/",true);
this.fenzi = Integer.parseInt(st.nextToken());
this.ch=st.nextToken().charAt(0);
this.fenmu = Integer.parseInt(st.nextToken());
}
public Fraction yuefen(int fz,int fm){
int i;
for (i=2;i<=fz&&i<=fm;i++){
if(fz%i==0&&fm%i==0){
fz=fz/i;
fm=fm/i;
}
}
Fraction result=new Fraction(fz+"/"+fm);
return result;
}
public Fraction getJia(Fraction x){
int newFenmu=fenmu*x.fenmu;
int newFenzi=fenzi*x.fenmu+x.fenzi*fenmu;
return yuefen(newFenzi,newFenmu);
}
public Fraction getJian(Fraction x){
int newFenmu=fenmu*x.fenmu;
int newFenzi=fenzi*x.fenmu-x.fenzi*fenmu;
return yuefen(newFenzi,newFenmu);
}
public Fraction getCheng(Fraction x){
int newFenmu=fenmu*x.fenmu;
int newFenzi=fenzi*x.fenzi;
return yuefen(newFenzi,newFenmu);
}
public Fraction getChu(Fraction x){
int newFenmu=fenmu*x.fenzi;
int newFenzi=fenzi*x.fenmu;
return yuefen(newFenzi,newFenmu);
}
@Override
public String toString() {
return fenzi + "/" + fenmu;
}
}
-
編寫計算器
public class RationalNumberCalculator {
public static void main(String[] args) {Fraction result; Fraction frac1,frac2; if(args[0].contains("/")){ frac1=new Fraction(args[0]); } else{ frac1=new Fraction(args[0]+"/"+1); } if(args[2].contains("/")){ frac2=new Fraction(args[2]); } else{ frac2=new Fraction(args[2]+"/"+1); } char ch=args[1].charAt(0); switch (ch) { case '+': result=frac1.getJia(frac2); System.out.println(frac1+String.valueOf(ch)+frac2+"="+result); break; case '-': result=frac1.getJian(frac2); System.out.println(frac1+String.valueOf(ch)+frac2+"="+result); break; case '*': result=frac1.getCheng(frac2); System.out.println(frac1+String.valueOf(ch)+frac2+"="+result); break; case '/': result=frac1.getChu(frac2); System.out.println(frac1+String.valueOf(ch)+frac2+"="+result); break; default: System.out.println("Illegal Input"); break; }
}
} -
執行結果
(四)遠端有理數計算器
之前編寫過有理數和伺服器的程式碼,這裡可以直接用
- 伺服器
package Demo;
import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.StringTokenizer;
public class Server192324 {
private static Fraction frac2;
private static Fraction frac1;
private static String a,b;
private static char ch;
private static Fraction result = null;
public static void main(String[] args) throws IOException {
ServerSocket serverSocket=new ServerSocket(4567);
Socket socket=serverSocket.accept();
InputStream inputStream=socket.getInputStream();
BufferedReader bufferedReader=new BufferedReader(new InputStreamReader(inputStream));
OutputStream outputStream=socket.getOutputStream();
PrintWriter printWriter=new PrintWriter(outputStream);
String info=null;
System.out.println("伺服器已經建立......");
while(!((info = bufferedReader.readLine()) ==null)){
System.out.println("我是伺服器,使用者資訊為:" + info);
StringTokenizer st = new StringTokenizer(info, " ", false);
a=st.nextToken();
ch=st.nextToken().charAt(0);
b=st.nextToken();
frac1=new Fraction(a);
frac2=new Fraction(b);
switch (ch)
{
case '+':
result=frac1.getJia(frac2);
break;
case '-':
result=frac1.getJian(frac2);
break;
case '*':
result=frac1.getCheng(frac2);
break;
case '/':
result=frac1.getChu(frac2);
break;
default:
break;
}
}
String reply=frac1+String.valueOf(ch)+frac2+"="+result;
printWriter.write(reply);
printWriter.flush();
printWriter.close();
outputStream.close();
bufferedReader.close();
inputStream.close();
socket.close();
serverSocket.close();
}
}
- 客戶端
package Demo;
import java.io.*;
import java.net.Socket;
public class SocketClient2 {
public static void main(String[] args) throws IOException {
//1.建立客戶端Socket連線,指定伺服器位置和埠
Socket socket = new Socket("",4567);
// Socket socket = new Socket("172.16.43.187",8800);
//2.得到socket讀寫流
OutputStream outputStream = socket.getOutputStream();
// PrintWriter printWriter = new PrintWriter(outputStream);
OutputStreamWriter outputStreamWriter = new OutputStreamWriter(outputStream);
//輸入流
InputStream inputStream = socket.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream,"UTF-8"));
//3.利用流按照一定的操作,對socket進行讀寫操作
String info1 = " 1/4 + 1/6";
// String info = new String(info1.getBytes("GBK"),"utf-8");
// printWriter.write(info);
// printWriter.flush();
outputStreamWriter.write(info1);
outputStreamWriter.flush();
socket.shutdownOutput();
//接收伺服器的響應
String reply = null;
while (!((reply = bufferedReader.readLine()) ==null)){
System.out.println("接收伺服器的資訊為:" + reply);
}
//4.關閉資源
bufferedReader.close();
inputStream.close();
outputStreamWriter.close();
//printWriter.close();
outputStream.close();
socket.close();
}
}
- 執行結果
(五)遠端複數計算器
-
複數類
package Demo;
import java.util.StringTokenizer;
public class Complex{
private int RealPart;
private int ImagePart;
private char ch;//建構函式
public Complex(){}
public Complex(String str){
StringTokenizer st=new StringTokenizer(str,".",true);
this.RealPart=Integer.parseInt(st.nextToken());
this.ch=st.nextToken().charAt(0);
this.ImagePart=Integer.parseInt(st.nextToken());
}//返回
public double getRealPart(){
return RealPart;
}public double getImagePart(){
return ImagePart;
}//接收
public void setRealPart(int realPart){
RealPart=realPart;
}public void setImagePart(int imagePart){
ImagePart=imagePart;
}//重寫函式toString
public String toString(){
return RealPart + "." + ImagePart;
}public boolean equals(Object a){
if (a==this){
return true;
}
else{
return false;
}
}// 定義公有方法:加減乘除
public Complex ComplexAdd(Complex a){
Complex b = new Complex((this.RealPart+a.RealPart)+"."+(this.ImagePart+a.ImagePart));
return b;
}
public Complex ComplexSub(Complex a){
Complex b = new Complex((this.RealPart-a.RealPart)+"."+(this.ImagePart-a.ImagePart));
return b;
}
public Complex ComplexMulti(Complex a){
Complex b = new Complex((this.RealParta.RealPart-this.ImageParta.ImagePart)+"."+(this.ImageParta.RealPart+this.RealParta.ImagePart));
return b;
}
public Complex ComplexDiv(Complex a){
double scale = a.getRealPart()a.getRealPart() + a.getImagePart()a.getImagePart();
Complex b = new Complex((a.getRealPart() / scale)+"."+
(- a.getImagePart() / scale));
return b;
}
} -
伺服器
package Demo;
import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.StringTokenizer;
public class Server192324_1 {
private static Complex cplx1;
private static Complex cplx2;
private static String a,b;
private static char ch;
private static Complex result = null;
public static void main(String[] args) throws IOException {
//1.建立一個伺服器Socket(ServerSocket)繫結指定埠
ServerSocket serverSocket=new ServerSocket(8809);
//2.使用accept()方法阻止等待監聽,獲得新連線
Socket socket=serverSocket.accept();
//3.獲得輸入流
InputStream inputStream=socket.getInputStream();
BufferedReader bufferedReader=new BufferedReader(new InputStreamReader(inputStream));
//獲得輸出流
OutputStream outputStream=socket.getOutputStream();
PrintWriter printWriter=new PrintWriter(outputStream);
//4.讀取使用者輸入資訊
String info=null;
System.out.println("伺服器已經建立......");
while(!((info = bufferedReader.readLine()) ==null)) {
System.out.println("我是伺服器,使用者資訊為:" + info);
StringTokenizer st = new StringTokenizer(info, " ", false);
a = st.nextToken();
ch = st.nextToken().charAt(0);
b = st.nextToken();
cplx1 = new Complex(a);
cplx2 = new Complex(b);
switch (ch) {
case '+':
result = cplx1.ComplexAdd(cplx2);
break;
case '-':
result = cplx1.ComplexSub(cplx2);
break;
case '*':
result = cplx1.ComplexMulti(cplx2);
break;
case '/':
result = cplx1.ComplexDiv(cplx2);
break;
default:
break;
}
}
//給客戶一個響應
String reply=cplx1+String.valueOf(ch)+cplx2+"="+result;
printWriter.write(reply);
printWriter.flush();
//5.關閉資源
printWriter.close();
outputStream.close();
bufferedReader.close();
inputStream.close();
socket.close();
serverSocket.close();
}
}
- 客戶端
import java.io.*;
import java.net.Socket;
public class SocketClient3 {
public static void main(String[] args) throws IOException {
//1.建立客戶端Socket連線,指定伺服器位置和埠
Socket socket = new Socket("",8809);
// Socket socket = new Socket("172.16.43.187",8800);
//2.得到socket讀寫流
OutputStream outputStream = socket.getOutputStream();
// PrintWriter printWriter = new PrintWriter(outputStream);
OutputStreamWriter outputStreamWriter = new OutputStreamWriter(outputStream);
//輸入流
InputStream inputStream = socket.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream,"UTF-8"));
//3.利用流按照一定的操作,對socket進行讀寫操作
String info1 = " 4.8 * 5.6";
// String info = new String(info1.getBytes("GBK"),"utf-8");
// printWriter.write(info);
// printWriter.flush();
outputStreamWriter.write(info1);
outputStreamWriter.flush();
socket.shutdownOutput();
//接收伺服器的響應
String reply = null;
while (!((reply = bufferedReader.readLine()) ==null)){
System.out.println("接收伺服器的資訊為:" + reply);
}
//4.關閉資源
bufferedReader.close();
inputStream.close();
outputStreamWriter.close();
//printWriter.close();
outputStream.close();
socket.close();
}
}
- 執行結果
3. 實驗過程中遇到的問題和解決過程
- 問題1:結對伺服器和客戶端傳送資訊時總是飄紅
- 問題1解決方案:cmd中找到自己的ip地址後輸入host中且連在一個wifi下解決了
- 問題2:密碼學習比較困難
- 問題2解決方案:參照連結的學習方法與自己網上搜索課外資料慢慢學習
其他(感悟、思考等)
- java真的太難了,頭皮發麻
- 至此實驗結束,java學習便告一段落了,自己可能學到的東西並沒有想象中的多,但還是都敲了一下程式碼,下網在下一階段的學習中能更認真努力一些。