java搭建Socket客户端和服务端
程序员文章站
2024-03-23 09:40:22
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搭建Socket服务端
public class SocketService {
public static void main(String[] args) throws IOException{
SocketService socketService = new SocketService();
socketService.oneServer();
}
public void oneServer(){
try{
ServerSocket server=null;
try{
server=new ServerSocket(5200);
System.out.println("server start is ok...");
//创建一个ServerSocket在端口5200监听客户请求
}catch(Exception e) {
System.out.println("can not listen to:"+e);
//出错,打印出错信息
}
Socket socket=null;
try{
socket=server.accept();
//使用accept()阻塞等待客户请求,有客户
//请求到来则产生一个Socket对象,并继续执行
}catch(Exception e) {
System.out.println("Error."+e);
//出错,打印出错信息
}
String line;
BufferedReader in=new BufferedReader(new InputStreamReader(socket.getInputStream()));
//由Socket对象得到输入流,并构造相应的BufferedReader对象
PrintWriter writer=new PrintWriter(socket.getOutputStream());
//由Socket对象得到输出流,并构造PrintWriter对象
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
//由系统标准输入设备构造BufferedReader对象
System.out.println("Client:"+in.readLine());
//在标准输出上打印从客户端读入的字符串
line=br.readLine();
//从标准输入读入一字符串
while(!line.equals("end")){
//如果该字符串为 "bye",则停止循环
writer.println(line);
//向客户端输出该字符串
writer.flush();
//刷新输出流,使Client马上收到该字符串
System.out.println("Server:"+line);
//在系统标准输出上打印读入的字符串
System.out.println("Client:"+in.readLine());
//从Client读入一字符串,并打印到标准输出上
line=br.readLine();
//从系统标准输入读入一字符串
} //继续循环
writer.close(); //关闭Socket输出流
in.close(); //关闭Socket输入流
socket.close(); //关闭Socket
server.close(); //关闭ServerSocket
}catch(Exception e) {//出错,打印出错信息
System.out.println("Error."+e);
}
}
}
搭建客户端
public class SocketClient {
public static void main(String[] args) throws IOException{
try{
Socket socket=new Socket("127.0.0.1",5200);
System.out.println("client start ...");
//向本机的52000端口发出客户请求
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
//由系统标准输入设备构造BufferedReader对象
PrintWriter write=new PrintWriter(socket.getOutputStream());
//由Socket对象得到输出流,并构造PrintWriter对象
BufferedReader in=new BufferedReader(new InputStreamReader(socket.getInputStream()));
//由Socket对象得到输入流,并构造相应的BufferedReader对象
String readline;
readline=br.readLine(); //从系统标准输入读入一字符串
while(!readline.equals("end")){
//若从标准输入读入的字符串为 "end"则停止循环
write.println(readline);
//将从系统标准输入读入的字符串输出到Server
write.flush();
//刷新输出流,使Server马上收到该字符串
System.out.println("Client:"+readline);
//在系统标准输出上打印读入的字符串
System.out.println("Server:"+in.readLine());
//从Server读入一字符串,并打印到标准输出上
readline=br.readLine(); //从系统标准输入读入一字符串
} //继续循环
write.close(); //关闭Socket输出流
in.close(); //关闭Socket输入流
socket.close(); //关闭Socket
}catch(Exception e) {
System.out.println("can not listen to:"+e);//出错,打印出错信息
}
}
服务端监听多个客户端
public void manyServer() throws IOException{
boolean flag = true;
ServerSocket serverSocket = null;
serverSocket = new ServerSocket(5200);
int clientNum = 0;
while(flag){
new SocketServerTherd(serverSocket.accept(), clientNum).start();
clientNum++;
}
serverSocket.close();
}
public class SocketServerTherd extends Thread{
Socket socket = null;
int clientNum = 0;
public SocketServerTherd(Socket socket,int num){
this.socket = socket;
this.clientNum = num+1;
}
public void run(){
try{
String line;
BufferedReader in=new BufferedReader(new InputStreamReader(socket.getInputStream()));
//由Socket对象得到输入流,并构造相应的BufferedReader对象
PrintWriter writer=new PrintWriter(socket.getOutputStream());
//由Socket对象得到输出流,并构造PrintWriter对象
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
//由系统标准输入设备构造BufferedReader对象
System.out.println("Client:"+in.readLine());
//在标准输出上打印从客户端读入的字符串
line=br.readLine();
//从标准输入读入一字符串
while(!line.equals("end")){
//如果该字符串为 "bye",则停止循环
writer.println(line);
//向客户端输出该字符串
writer.flush();
//刷新输出流,使Client马上收到该字符串
System.out.println("Server:"+line);
//在系统标准输出上打印读入的字符串
System.out.println("Client:"+in.readLine());
//从Client读入一字符串,并打印到标准输出上
line=br.readLine();
//从系统标准输入读入一字符串
} //继续循环
writer.close(); //关闭Socket输出流
in.close(); //关闭Socket输入流
socket.close(); //关闭Socket
}catch(Exception e) {//出错,打印出错信息
System.out.println("Error."+e);
}
}
}
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