多线程上传文件
// 客户端
public class Demo_Upload_Client {
public static void main(String[] args) throws Exception {
// 1. 提示输入要上传的文件路径,验证路径是否存在以及是否是文件夹
File file = getFile();
// 2. 发送文件到服务器
Socket socket = new Socket("127.0.0.1", 6666);
BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
PrintStream ps = new PrintStream(socket.getOutputStream());
ps.println(file.getName());
// 6. 接收结果,如果存在给予提示,程序直接退出
String result = br.readLine();// 读取结果
if ("文件存在".equals(result)) {
System.out.println("文件已经存在");
socket.close();
return;
} else {
// 7. 不存在,定义FileInputStream读取文件,写出到网络
FileInputStream fis = new FileInputStream(file);
byte[] arr = new byte[8192];
int len;
while ((len = fis.read(arr)) != -1) {
ps.write(arr, 0, len);
}
fis.close();
socket.close();
}
}
/**
* 获取文件对象
*
* @return File
*/
private static File getFile() {
Scanner sc = new Scanner(System.in);
System.out.println("请输入一个文件路径:");
while (true) {
String line = sc.nextLine();
File file = new File(line);
if (!file.exists()) {
System.out.println("路径不存在");
} else if (file.isDirectory()) {
System.out.println("必须是文件");
} else {
return file;
}
}
}
}
// 服务器
public class Demo_Upload_Server {
public static void main(String[] args) throws Exception {
// 3. 建立多线程服务器
ServerSocket ss = new ServerSocket(6666);
System.out.println("服务器启动");
// 4. 读取文件名
while (true) {
final Socket socket = ss.accept();// 接收请求
InputStream is = socket.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
PrintStream ps = new PrintStream(socket.getOutputStream());
new Thread() {
@Override
public void run() {
try {
BufferedReader br = new BufferedReader(new InputStreamReader(is));
PrintStream ps = new PrintStream(socket.getOutputStream());
String fileName = br.readLine(); // 读取文件名
File dir = new File("update");
dir.mkdir();
File file = new File(dir, fileName);
// 5. 判断文件是否已经存在
if (file.exists()) {
ps.println("文件存在");
socket.close();
return;
} else {
ps.println("不存在");
}
// 8. 定义FileOutputStream,从网络读取数据,存储到本地
FileOutputStream fos = new FileOutputStream(file);
byte[] arr = new byte[8192];
int len;
while ((len = is.read(arr)) != -1) {
fos.write(arr, 0, len);
}
fos.close();
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}.start();
}
}
}
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