Question

我正在尝试将audio file从服务器转移到客户端并将其写入另一个文件。 server正在从客户端读取文件，但它正在连续忽略新行读取文件的内容。例如，有一个文本，如“我正在做客户端服务器程序”，在文件的下一行文本是“在Java中”。服务器读作“我正在做客户端服务器编程Java”。我的问题是如何逐行阅读内容..

我的代码如下......

*

服务器

**try
{
`   try
        {
            System.out.println("Im server waiting for client request");
            ss=new ServerSocket(2005);
            Socket s=ss.accept();

             InputStream is = s.getInputStream( );//Input Stream
             BufferedReader fileRead =new BufferedReader(new       InputStreamReader(is));
             String fname = fileRead.readLine( );


            OutputStream os = s.getOutputStream( );//socket output stream
             PrintWriter pw = new PrintWriter(os, true);

             BufferedReader br = new BufferedReader(new FileReader(fname) );//read File

             String str;//initiating string and StringBuffer

             StringBuilder sb=new StringBuilder();

            while((str = br.readLine()) !=  null) // reading line-by-line from file
            {
                sb.append(str);//append to stringBuffer sb

            }
            System.out.println("The string is in server" +sb);

            pw.println(sb);
            pw.flush();
            pw.close();
            is.close();
            fileRead.close();
        os.close();
        pw.close();
        br.close();

        }
        catch(Exception e)
        {
            e.getMessage();
            e.getStackTrace();
            e.getSuppressed();
        }`
The Client side::

    try {
            System.out.println("Im client ..sending request");
            Socket s=new Socket("127.0.0.1",2005);//Initiate Socket

            System.out.println("Enter filename");


            BufferedReader bw=new BufferedReader(new InputStreamReader(System.in));//Take fileName from keyBoard

            String filename=bw.readLine();//Read filename into  a string

            OutputStream dout=new DataOutputStream(s.getOutputStream());//output Stream
            PrintWriter pw=new PrintWriter(dout,true);

            pw.println(filename);//write filename to socket

            InputStream is = s.getInputStream( );//Input Stream
            BufferedReader in =new BufferedReader(new InputStreamReader(is));
            String clstr;
            StringBuilder sd=new StringBuilder();
            while((clstr=in.readLine())!=null)
            {
                sd.append(clstr);
             //clstr=in.readLine();//Read String From socket into "clstr" string

            }
             System.out.println("The string in client is" +sd);

            File f=new File("A://music/kin.txt");//Open a file

            if(!f.exists())
                f.createNewFile();//if not existed create it

            try
            {
            //PrintWriter bf=new PrintWriter(new FileWriter(f)); //Write to a file
                BufferedWriter bf=new BufferedWriter(new FileWriter(f));
            //bf.append(clstr);
            //bf.write(sd);
            bf.append(sd);
            bf.flush();
            bf.close();
            }
            catch(Exception e)
            {
                e.getMessage();
                e.getSuppressed();
                e.getStackTrace();
            }

            System.out.println("The Content written is" +sd);

            bw.close();
            pw.close();
        dout.close();
        in.close();
        is.close();

        } catch (UnknownHostException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

Answer 1

您的描述还不清楚，但我怀疑这是问题所在：

while((str = br.readLine()) !=  null) // reading line-by-line from file
{
    sb.append(str);//append to stringBuffer sb
}

来自readLine() 的返回值不包含换行符......并且您不会在StringBuilder中添加一个换行符。因此，如果您收到以下行：

“第一”
“第二”
“第三”

结果将是“第一次第二次”。您只需要自己添加适当的换行符：

// Or whatever line break you want
String lineBreak = System.getProperty("line.separator");
while((str = br.readLine()) != null)
{
    sb.append(str);
    sb.append(lineBreak);
}

请注意，如果您确实尝试传输此类音频文件，则不应该 - 音频文件是二进制数据，因此您应该只读取{ {1}};不要使用InputStream，因为它是为 text 数据而设计的。

Java :: server中的Client Server程序不能逐行读取文件中的文本

1 个答案: