如何使用tomcat和java編寫遠程文件

Question

如何使用tomcat和java編寫遠程文件。 我使用以下Java代碼：

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);

在輸出中，我得到以下結果：

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"]

並且服務器已停止。 請回應我

Answer 1

在此代碼路徑，你收out ，這大約是connextion的OutputStream的一個PrintWriter包裝，然后調用connextion.disconnect() 我懷疑.disconnect()方法試圖再次關閉流，從而導致異常或您未捕獲的某些錯誤。 我建議刪除out.close()並再試一次。

Answer 2

我使用此代碼：

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();
                } 

但是文件pervasiveSystemDescription1.txt未被修改，並且字符串（“ okkkk”）也未寫入此文件中。

謝謝您的考慮。