发送一个整数值,然后用java将整个文件从客户端发送到服务器
基本上,这就是我所做的:- 客户端发送一个整数值,然后用java将整个文件从客户端发送到服务器,java,file-upload,client-server,Java,File Upload,Client Server,基本上,这就是我所做的:- 客户端 public class Client { public String uploadFile(String filePath,int language) throws Exception { Socket sock = new Socket("127.0.0.1", 25000); // make the file object from filepath File myFile = new Fil
public class Client {
public String uploadFile(String filePath,int language) throws Exception {
Socket sock = new Socket("127.0.0.1", 25000);
// make the file object from filepath
File myFile = new File(filePath);
// send the integer 'language'
OutputStream os = sock.getOutputStream();
OutputStreamWriter osw = new OutputStreamWriter(os);
BufferedWriter bw = new BufferedWriter(osw);
bw.write(language);
bw.flush();
// send the file data
byte[] mybytearray = new byte[(int) myFile.length()];
BufferedInputStream bis = new BufferedInputStream(new FileInputStream(
myFile));
bis.read(mybytearray, 0, mybytearray.length);
os.write(mybytearray, 0, mybytearray.length);
os.flush();
bis.close();
// get the reply
InputStream is = sock.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String message = br.readLine();
sock.close();
return message;
}
}
服务器端:-
void connectToNewClient(Socket sock) throws IOException,
InterruptedException {
// get the integer 'language'
InputStream is = sock.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String language = br.readLine();
// Read file data sent by client and store in server
byte[] mybytearray = new byte[50000];
FileOutputStream fos = new FileOutputStream("Main.txt");
BufferedOutputStream bos = new BufferedOutputStream(fos);
int bytesRead = is.read(mybytearray, 0, mybytearray.length);
bos.write(mybytearray, 0, bytesRead);
bos.close();
// give back response
OutputStream os = sock.getOutputStream();
OutputStreamWriter osw = new OutputStreamWriter(os);
BufferedWriter bw = new BufferedWriter(osw);
bw.write(response);
bw.flush();
sock.close();
}
所以我的问题是,当我只从客户端发送文件或只发送整数时,我可以在服务器端接收它们,但是,当我尝试同时发送它们时,我在服务器端没有接收到任何东西。我猜我搞乱了这么多writer对象和数据流对象。请帮我找出哪里出了问题。非常感谢。
注意:我删除了几行我认为与我的问题无关的代码。您将流包装在BufferedWriter中,这通常是一件好事,原因有很多。代码中的奇怪之处在于,您将该编写器用于整数,而将未包装的输出流用于文件。我怀疑这两个写操作不能在不重新实例化写入程序的情况下使用
我建议您只使用一个编写器重构代码。我会选择更通用的,它允许您发送实现可序列化接口的对象(您的场景已经满足此约束)。您可以通过ObjectInputStream直接接收对象。是否尝试关闭OutputStreamWriter?