如何使用tomcat和java编写远程文件

Question

how to write a remote file using the tomcat and java. I use this java code :

HttpURLConnection connexion = null;    
try {
URL("http://localhost:8080/GeneralSemanticWebService/Models/pervasiveSystemDescription1.txt");
System.out.println("Connexion a l'url ...");
connexion = (HttpURLConnection) url.openConnection();
connexion.setAllowUserInteraction(true);
connexion.setDoOutput(true);
connexion.setRequestProperty("Content-Length", (""+ texte.length()));
connexion.setRequestProperty("Content-Type", "RDF/XML-ABBREV");
PrintWriter out = new PrintWriter(connexion.getOutputStream());
if (connexion.getResponseCode() != HttpURLConnection.HTTP_OK) {
System.out.println(connexion.getResponseMessage());
} else {
System.out.println("Ecriture ...");
out.write("okkkk");
out.close();}   
} catch (Exception e) {
e.printStackTrace();
} finally {
connexion.disconnect();
}
System.exit(0);

In the output I have this result :

INFOS: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
janv. 06, 2015 6:27:32 PM org.apache.coyote.AbstractProtocol start
INFOS: Starting ProtocolHandler ["http-nio-8080"]
janv. 06, 2015 6:27:32 PM org.apache.coyote.AbstractProtocol start
INFOS: Starting ProtocolHandler ["ajp-nio-8009"]
janv. 06, 2015 6:27:32 PM org.apache.catalina.startup.Catalina start
INFOS: Server startup in 54713 ms
Connexion a l'url ...
Ecriture ...
janv. 06, 2015 6:27:44 PM org.apache.coyote.AbstractProtocol pause
INFOS: Pausing ProtocolHandler ["http-nio-8080"]

and the server is stopped. Please respond me

Answer 1

In this code path, you are closing out , which is a PrintWriter wrapper around connextion's OutputStream, then calling connextion.disconnect() . I suspect that the .disconnect() method attempts to close the stream again, causing an exception or some error you're not capturing. I suggest to remove the out.close() and try again.

Answer 2

I used this code :

HttpURLConnection connexion = null;    

try {

URL url = new URL("http://localhost:8080/GeneralSemanticWebService/Models/pervasiveSystemDescription1.txt");

System.out.println("Connexion a l'url ...");

        connexion = (HttpURLConnection) url.openConnection();



connexion.setAllowUserInteraction(true);
                connexion.setDoOutput(true);
                connexion.setRequestProperty("Content-Length", (""+ texte.length()));
                connexion.setRequestProperty("Content-Type", "RDF/XML-ABBREV");
                PrintWriter out = new PrintWriter(connexion.getOutputStream());
                if (connexion.getResponseCode() != HttpURLConnection.HTTP_OK) {
                System.out.println(connexion.getResponseMessage());
                } else {
                System.out.println("Ecriture ...");
                out.write("okkkk");
                }   
                } catch (Exception e) {
                e.printStackTrace();
                } 

But the file pervasiveSystemDescription1.txt is not modified, and the String ("okkkk") is not written in this file.

Thank you for your consideration.