outputstream | 易学教程

How to use HttpsURLConnection through proxy by setProperty?

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Network environment: Https Client<=============>Proxy Server<==============>Https Server 192.168.17.11<-----extranet------>192.168.17.22 10.100.21.10<----intranet----->10.100.21.11 ps: Http Client without default gateway, but it can ping to 10.100.21.11 Description: OS: Ubuntu 12.04 on 3 hosts Https Client: Implement with java(openjdk-6).Have one network-interface. Proxy Server: Apache2.2.Have two network-interfaces. Https Server: Tomcat6.Have one network-interface. I use two method to implement httpsurlconnection through proxy: (For facilitate I do not write down about ssl handle function for

java.lang.IllegalStateException: Already using output stream [closed]

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windchill GUI on client side browser when a user clicks on a button particular pdf file should gets downloaded on his system.I have achieved this by using the following code. <body> <% String pdfname= session.getAttribute("pdfname").toString(); String Pdfpath= session.getAttribute("pdfpath").toString(); File f =new File(Pdfpath); Boolean flag=false; if(f.exists()) { BufferedInputStream filein = null; BufferedOutputStream out2=null; try { File file = new File(Pdfpath);//specify the file path byte b[] = new byte[1048576]; int len = 0; filein = new BufferedInputStream(new FileInputStream(file));

Java - System.out effect on performance

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I've seen this question and it's somewhat similar. I would like to know if it really is a big factor that would affect the performance of my application. Here's my scenario. I have this Java webapp that can upload thousands of data from a Spreadsheet which is being read per row from top to bottom. I'm using System.out.println() to show on the server's side on what line the application is currently reading. - I'm aware of creating a log file. In fact, I'm creating a log file and at the same time, displaying the logs on the server's prompt. Is there any other way of printing the current data on

How do I write to an OutputStream using DefaultHttpClient?

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How do I get an OutputStream using org.apache.http.impl.client.DefaultHttpClient ? I'm looking to write a long string to an output stream. Using HttpURLConnection you would implement it like so: HttpURLConnection connection = (HttpURLConnection)url.openConnection(); OutputStream out = connection.getOutputStream(); Writer wout = new OutputStreamWriter(out); writeXml(wout); Is there a method using DefaultHttpClient similar to what I have above? How would I write to an OutputStream using DefaultHttpClient instead of HttpURLConnection ? e.g DefaultHttpClient client = new DefaultHttpClient();

Is there a Null OutputStream in Java?

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I need to specify an OutputStream for an API I'm using, but I don't actually have a need for the output. Does Java have an OutputStream equivalent to > /dev/null ? Jon Java doesn't it would seem but Apache Commons IO does. Take a look at the following: https://commons.apache.org/proper/commons-io/javadocs/api-2.5/org/apache/commons/io/output/NullOutputStream.html Hope that helps. /**Writes to nowhere*/ public class NullOutputStream extends OutputStream { @Override public void write(int b) throws IOException { } } haylem It's not mentioned yet, so I'll also add Guava 's ByteStreams .

Java Process with concurrent Input/Output Streams

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问题 I am trying to create a sort of console/terminal that allows the user to input a string, which then gets made into a process and the results are printed out. Just like a normal console. But I am having trouble managing the input/output streams. I have looked into this thread, but that solution sadly doesn't apply to my problem. Along with the standard commands like "ipconfig" and "cmd.exe", I need to be able to run a script and use the same inputstream to pass some arguments, if the script is

How to upload a Java OutputStream to AWS S3

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问题 I create PDF docs in memory as OutputStream s. These should be uploaded to S3. My problem is that it's not possible to create a PutObjectRequest from an OutputStream directly (according to this thread in the AWS dev forum). I use aws-java-sdk-s3 v1.10.8 in a Dropwizard app. The two workarounds I can see so far are: Copy the OutputStream to an InputStream and accept that twice the amount of RAM is used. Pipe the OutputStream to an InputStream and accept the overhead of an extra thread (see

Is there a way to make PHP progressively output as the script executes?

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问题 So I'm writing a disposable script for my own personal single use and I want to be able see how the process is going. Basically I'm processing a couple of thousand media releases and sending them to our new CMS. So I don't hammer the CMS, I'm making the script sleep for a couple of seconds after every 5 requests. I would like - as the script is executing - to be able to see my echo s telling me the script is going to sleep or that the last transaction with the webservice was successful. Is

How to write array to OutputStream in Java?

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问题 I want to send more than one random value though Socket . I think array is the best way to send them. But I don't know how to write an array to Socket OutputStream ? My Java class: import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; import java.net.Socket; import java.io.*; import java.util.Random; public class NodeCommunicator { public static void main(String[] args) { try { Socket nodejs = new Socket("localhost", 8181); Random randomGenerator = new

How to convert an InputStream to a DataHandler?

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I'm working on a java web application in which files will be stored in a database. Originally we retrieved files already in the DB by simply calling getBytes on our result set: byte[] bytes = resultSet.getBytes(1); ... This byte array was then converted into a DataHandler using the obvious constructor: dataHandler=new DataHandler(bytes,"application/octet-stream"); This worked great until we started trying to store and retrieve larger files. Dumping the entire file contents into a byte array and then building a DataHandler out of that simply requires too much memory. My immediate idea is to