July 2012
Intermediate to advanced
496 pages
17h 50m
Polish
Content preview from Tomcat. Przewodnik encyklopedyczny. Wydanie IIBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Nadawanie uprawnień do plików
Wiele aplikacji WWW korzysta z systemu plików w celu zapisywania w nim danych i wczytywania ich. Jeśli serwer Tomcat załaduje się z aktywnym narzędziem SecurityManager, nie umożliwi ono aplikacjom WWW odczytywania i zapisywania ich własnych plików danych. Aby aplikacje te mogły działać pod kontrolą narzędzia SecurityManager, trzeba im nadać odpowiednie uprawnienia.
Przykład 6-1 prezentuje prosty serwlet HttpServlet, który próbuje w systemie plików utworzyć plik tekstowy i wyświetla komunikat informujący o tym, czy operacja zapisu powiodła się.
Przykład 6-1. Zapisywanie pliku przez serwlet
package com.oreilly.tomcat.servlets; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.PrintWriter; ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.