outputstream

问题 Following code is used to insert data in the database. When application is launched, following code is executed. After RecentDBManager is executed, when I PULL database from emulator memory, it shows no record in FavoriteScrip table. When I logged InsertStmt in setData method, it works fine. It shows insert into FavoriteScrip(sym,cmp,chg) values ('value1','value2','value3') but it is not getting inserted in table... In main class rdbM = new RecentDBManager(CompanyView.this); try { if (!rdbM

问题 I know I can gzip the output stream by using something like.. OutputStream outA = response.getOutputStream(); outWriter = new PrintWriter(new GZIPOutputStream(outA), false); response.setHeader("Content-Encoding", "gzip"); outWriter.println(.....); outWriter.close(); in a JSP, but is it possible to write it as: OutputStream outA = response.getOutputStream(); outWriter = new PrintWriter(new GZIPOutputStream(outA), false); response.setHeader("Content-Encoding", "gzip"); %> ... I know this is

问题 I want to be able to create a new Blob object and then write to it. Originally, my general plan for this was as follows: Create a new blob (null, because there's no Blob constructor) Create a new OutputStream and set it to blob.setBinaryStream(0) Write to the output stream. However, I get a NullPointerException when I try to execute this code. Is there a different way I should be going about this? Any help would be appreciated. Thanks! ~B 回答1: java.sql.Blob is an interface and not a class,

问题 I am sending images through sockets using ByteArrayOutputStreams like this. ImageIO.write(image, "gif", byteArrayO); byte [] byteArray = byteArrayO.toByteArray(); Connection.pw.println("" + byteArray.length); int old = Connection.client.getSendBufferSize(); Connection.client.setSendBufferSize(byteArray.length); Connection.client.getOutputStream().write(byteArray, 0, byteArray.length); Everything works OK, the image is like 130kb in the end, and I receive it like this int nbrToRead = Integer

问题 I have a car with a bluetooth interface that I connect to using my android app. Robot is programmed so that when he gets a digit 1-5, he makes an action. 1 - drive forward 2 - drive backward 3 - turn left 4 - turn right 5 - stop I have 5 buttons in my app. Their events' look like this public void button1(View view){ socket.write("1"); } where socket is the class that holds BluetoothSocket and makes a connection and has write function: public void write(String signal) { try { OutputStream

问题 i got the image from post response PostMethod post = new PostMethod(action); HttpClient httpClient = createHttpClient(); ........ httpClient.executeMethod(post); try { log.info("post successfully"); String contentType = post.getResponseHeader("Content-type").getValue(); int contentLength = (int) post.getResponseContentLength(); byte[] responseBody = FileUtils.convertInputStreamtoByteArray(post.getResponseBodyAsStream()); log.info("get response sucessfully : size "+ responseBody.length +"

问题 I have read a lot of the questions/replies to java socket programming, but none of them apply to my current issue. I have written a basic java ssl socket program, whose sole purpose (for the moment) is to establish an ssl connection between the client and server and send one signed message by the client. If the message gets verified by the server, it should reply accordingly with (true!) or otherwise with (false!). I get stuck after the handshake pase, when the client sends a "message" to the

问题 I am having some trouble using the redirected input/output of a process. Originally, I had two applications communicating over tcp/ip. The server tells the client to open up cmd.exe and then gives commands to the client that the client has to redirect to the cmd.exe process. Then the client reads the output and sends it back to the server. Basically I was creating a way to use the command line remotely. The problem is it that it works for the first command and then nothing afterwards. I was

问题 So I'm trying to write my encoded buffered image to an output stream but I can't get any data to come through on the stream... Could anyone tell me what I'm doing wrong and why I can't see any output? I would expect that when I call the write.encodeVideo method that it encode's video into my ByteArrayOutputStream... is that assumption wrong? ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); // video parameters final int videoStreamIndex = 0; final int videoStreamId = 0; final

问题 I am doing two succssive calls to my servlet from android in this way: //FIRST CONNECTION URL url = new URL("http://172.16.32.160:8080/xyz/check_availability"); HttpURLConnection connection =(HttpURLConnection) url.openConnection(); connection.setDoOutput(true); ObjectOutputStream out=new ObjectOutputStream(connection.getOutputStream()); String a="xya"; String b="xsw"; out.writeObject(a); out.flush(); ObjectInputStream in=new ObjectInputStream(connection.getInputStream()); String s=(String)