Java基於TCP的Socket編程練習
阿新 • • 發佈:2018-03-21
net sin oar servers nbsp number 資源 tis trace
環境:Notpad ++ 6.0 + JDK 6.0.31
問題:使用套接字編寫客戶—服務器程序,實現客戶—服務器交互計算。客戶將三角形3個邊的長度發給服務器,服務器把計算出的三角形的面積返回給客戶。
解決:利用Java的Socket編程。客戶端發送數據,服務端接收數據,並進行相應的處理。
代碼:
TcpServer.java:
[java] view plain copy
- import java.io.BufferedReader;
- import java.io.InputStreamReader;
- import java.net.ServerSocket;
- import java.net.Socket;
- public class TcpServer {
- public static final int NUM = 3;
- public static void main(String args[]){
- TcpServer tcpServer = new TcpServer();
- try {
- ServerSocket server = null;
- try {
- server = new ServerSocket(4700);
- } catch (Exception e) {
- e.printStackTrace();
- }
- Socket socket = null;
- try {
- socket = server.accept();
- } catch (Exception e) {
- e.printStackTrace();
- }
- String line = "";
- double a[] = new double[NUM];
- BufferedReader is = new BufferedReader(new InputStreamReader
- (socket.getInputStream()));
- System.out.println("從客戶端接收三角形的三條邊:");
- for (int i = 0; i < a.length; i++) {
- line = is.readLine();
- a[i] = Double.parseDouble(line);
- }
- System.out.println("三角形的面積是:" + tcpServer.countarea(a));
- is.close();//關閉讀取流
- socket.close();//關閉Socket
- server.close();//關閉ServerSocket
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
- //計算三角形面積的方法
- public double countarea(double a[]){
- double area = 0.0;
- double temp = 0.0;
- double aside = 0.0;
- double bside = 0.0;
- double cside = 0.0;
- aside = a[0];
- bside = a[1];
- cside = a[2];
- temp = a[0] + a[1] + a[2];
- temp = temp / 2;
- area = Math.sqrt(temp * (temp - aside) * (temp - bside) * (temp - cside));
- return area;
- }
- }
TcpClient.java
[java] view plain copy
- import java.io.BufferedReader;
- import java.io.InputStreamReader;
- import java.io.PrintWriter;
- import java.net.Socket;
- public class TcpClient {
- public static final int NUM = 3;
- public static void main(String args[]){
- try {
- Socket socket = new Socket("127.0.0.1", 4700);
- BufferedReader sin = new BufferedReader(new InputStreamReader(System.in));
- PrintWriter os = new PrintWriter(socket.getOutputStream());
- System.out.println("從客戶端接收三角形的三條邊發送到服務器:");
- System.out.println("請輸入3條邊:");
- String readline = "";
- for (int i = 0; i < NUM; i++) {
- os.flush();
- readline = sin.readLine();
- os.println(readline);
- }
- os.close();
- socket.close();
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
- }
運行:
把客戶端程序(TcpClient.java)和服務端程序(TcpServer.java)分別編譯,再打開兩個Cmd控制臺,先運行服務端,再運行客戶端,在客戶端輸入數據,然後就可以在服務端看到結果。
運行效果截圖:
服務端:
客戶端:
資源下載 :www.makeru.com.cn/?t=12Java基於TCP的Socket編程練習