Java基于TCP的Socket编程练习
环境:Notpad ++ 6.0 + JDK 6.0.31
问题:使用套接字编写客户—服务器程序,实现客户—服务器交互计算。客户将三角形3个边的长度发给服务器,服务器把计算出的三角形的面积返回给客户。
解决:利用Java的Socket编程。客户端发送数据,服务端接收数据,并进行相应的处理。
代码:
TcpServer.java:
- 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("从客户端接收三角形的三条边:");
- for (int i = 0; i < a.length; i++) {
- line = is.readLine();
- a[i] = Double.parseDouble(line);
- }
- System.out.println("三角形的面积是:" + tcpServer.countarea(a));
- is.close();//关闭读取流
- socket.close();//关闭Socket
- server.close();//关闭ServerSocket
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
- //计算三角形面积的方法
- 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
- 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("从客户端接收三角形的三条边发送到服务器:");
- System.out.println("请输入3条边:");
- 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();
- }
- }
- }
运行:
把客户端程序(TcpClient.java)和服务端程序(TcpServer.java)分别编译,再打开两个Cmd控制台,先运行服务端,再运行客户端,在客户端输入数据,然后就可以在服务端看到结果。
运行效果截图:
服务端:
客户端:
资源下载 :www.makeru.com.cn/?t=12