-
Notifications
You must be signed in to change notification settings - Fork 1
Expand file tree
/
Copy pathFileDialogClient.java
More file actions
executable file
·57 lines (50 loc) · 2.01 KB
/
Copy pathFileDialogClient.java
File metadata and controls
executable file
·57 lines (50 loc) · 2.01 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package ftpclient;
import java.io.*;
import java.net.*;
public class FileDialogClient {
//套接字程序设计.
private Socket socket = null;
//用于字节和字符之间转换用的变量.
private PrintWriter pw;
private BufferedReader br;
public FileDialogClient(String ip, String port) throws IOException {
socket = new Socket(ip, Integer.parseInt(port));
//主动向服务器发起连接,实现TCP中三次握手的过程。
//若不成功(网络问题,地址错误,服务器资源紧张等),抛出错误，其错误信息交由调用者处理。
//若成功,做下面两件事情。
OutputStream socketOut = socket.getOutputStream();
pw = new PrintWriter(new OutputStreamWriter(socketOut, "GB2312"), true);
//得到网络输出字节流地址,并装饰成网络输出字符流
InputStream socketIn = socket.getInputStream();
br = new BufferedReader(new InputStreamReader(socketIn, "GB2312"));
//得到网络输入字节流地址,并装饰成网络输入字符流
}
public void send(String msg) {
pw.println(msg);
//输出字符流，由Socket调用系统底层函数，经网卡发送字节流。
}
public String receive() {
String msg;
try {
msg = br.readLine();
//从网络输入字符流中读信息,每次只能接收一行信息.
//若不够一行(无行结束符),该语句阻塞(阻塞语句),直到条件满足,程序才往下运行
} catch (IOException ex) {
msg = null;
}
return msg;
}
public void close() {
try {
if (socket != null) {
socket.close();//实现四次握手断开.
}
} catch (IOException ex) {
}
}
//模块内测试与运行，需先运行TCPServer。
}