我正在尝试执行这个程序, http: //java.sun.com/developer/technicalArticles/ThirdParty/WebCrawler/WebCrawler.java 在我参考这个页面后,程序编译没有任何错误, http://www.velocityreviews.com /forums/t146972-web-crawler.html
但是在使用命令“appletviewer WebCrawler.html”执行时,我得到了这个异常..
Exception in thread "Thread-4"
java.security.AccessControlException:access denied(java.net.SocketPermission java.sun.com:80 connect,resolve)
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:323)
at java.security.AccessController.checkPermission(AccessController.java:546)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
at java.lang.SecurityManager.checkConnect(SecurityManager.java:1034)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
at sun.net.www.http.HttpClient.<init>(HttpClient.java:233)
at sun.net.www.http.HttpClient.New(HttpClient.java:306)
at sun.net.www.http.HttpClient.New(HttpClient.java:323)
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:860)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:801)
at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:726)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1049)
at java.net.URL.openStream(URL.java:1010)
at WebCrawler.robotSafe(WebCrawler.java:139)
at WebCrawler.run(WebCrawler.java:235)
at java.lang.Thread.run(Thread.java:619)
我如何使它工作。?