Java中的read()和readline()方法

read()把字节读取成字符，按字符进行读取输出流，
readline()按行读取，直到读到空格或者换行符停止。
这俩可以互换使用，readline速度略慢，直接写两个使用的例子吧：

            //本地调用命令行时，按字符读取
            Runtime run = Runtime.getRuntime ();       
            Process process = run.exec ( cmd );
            InputStream in = process.getInputStream ();
            StringBuffer out = new StringBuffer ();
            byte[] b = new byte[8192];
            for (int n; (n = in.read ( b )) != -1; ) {
                out.append ( new String ( b, 0, n ) );
            }
            System.out.println ( out.toString () );
            in.close ();
            process.destroy ();
        

            //远程调用linux时，按行读取
            InputStream stdout = new StreamGobbler ( session.getStdout () );
            BufferedReader br = new BufferedReader ( new InputStreamReader ( stdout ) );
            String line;
            String result=null;
            while ((line = br.readLine ()) != null) {
                if (line.contains ( "copied" )) {
                    result = "yes";
                    break;
                } else
                    result = null;
            }