从java程序关闭特定URL的Web浏览器

我想从java程序中关闭特定URL的打开Web浏览器/浏览器选项卡。 我可以使用java中的Desktop API在Internet Explorer中打开URL。

下面是在IE中打开浏览器的代码片段

java.awt.Desktop desktop = java.awt.Desktop.getDesktop(); desktop.browse(new java.net.URI("http://www.xyzz.com")); 

现在，当我再次运行程序时，我想确保在浏览器中没有已打开上述URL的实例。 如果是这样，请关闭它并在新的TAB或浏览器窗口中再次打开它。 这可能看起来很奇怪。

我知道应该解决这个问题的基本方法是，我们需要识别进程并终止它，然后再次调用上面的代码。

任何建议都是受欢迎的。

Answer 1

我怀疑你可以用桌面做很多事情，因为你没有得到任何关于已启动过程的参考。

我过去曾经使用过这种技术（在Java 6之前没有Desktop的地方）并且因为它适用于Process，你应该能够杀掉它。

 public static void openURL(String url) { StringBuilder sb = new StringBuilder(); if (System.getProperty("os.name").indexOf("Windows")>-1) { String command = null; String urlLC = url.toLowerCase(); if (urlLC.startsWith("https")) { command = WindowsCommandRetriever.getCommandForFileType("https"); } else if (urlLC.startsWith("http")) { command = WindowsCommandRetriever.getCommandForFileType("http"); } if (command == null) { command = WindowsCommandRetriever.commandForExtension(".html"); } if (command.indexOf("%1") > -1) { sb.append(command.substring(0, command.indexOf("%1"))); sb.append(url); sb.append(command.substring(command.indexOf("%1") + "%1".length())); } else { sb.append(command).append(' '); sb.append('"'); sb.append(url); sb.append('"'); } } else { sb.append("open "); sb.append(url); } try { final Process p = Runtime.getRuntime().exec(sb.toString()); // Here you have the process. You can destroy it if you want // You need to figure out how you are going to handle this here. } catch (IOException e1) { e1.printStackTrace(); System.err.println("Error while executing " + sb.toString()); } } 

和WindowsCommandRetriever：

 /* * (c) Copyright 2010-2011 AgileBirds * * This file is part of OpenFlexo. * * OpenFlexo is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * OpenFlexo is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with OpenFlexo. If not, see . * */ public class WindowsCommandRetriever { /** * * @param extension * the file extension (with or without the preceding '.') * @return the command to execute for the specified extension or null if there are no associated command */ public static String commandForExtension(String extension) { String regKey = "HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\FileExts\\" + extension; String fileType = WinRegistryAccess.getRegistryValue(regKey, "ProgID", WinRegistryAccess.REG_SZ_TOKEN); if (fileType == null) { StringBuilder sb = new StringBuilder("cmd /C assoc "); sb.append(extension.startsWith(".") ? extension : "." + extension); ConsoleReader reader; try { Process process = Runtime.getRuntime().exec(sb.toString()); reader = new ConsoleReader(process.getInputStream()); reader.start(); process.waitFor(); reader.join(); } catch (IOException e) { e.printStackTrace(); return null; } catch (InterruptedException e) { e.printStackTrace(); return null; } String result = reader.getResult(); if (result.indexOf("=") > -1) { fileType = result.substring(result.indexOf("=") + 1).trim(); } } if (fileType == null) { return null; } return getCommandForFileType(fileType); } public static String getCommandForFileType(String fileType) { String path = "HKEY_CLASSES_ROOT\\" + fileType + "\\shell\\open\\command"; return WinRegistryAccess.getRegistryValue(path, null, WinRegistryAccess.REG_SZ_TOKEN); } } /* * (c) Copyright 2010-2011 AgileBirds * * This file is part of OpenFlexo. * * OpenFlexo is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * OpenFlexo is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with OpenFlexo. If not, see . * */ import java.io.IOException; import java.io.InputStream; import java.io.StringWriter; public class WinRegistryAccess { private static final String REGQUERY_UTIL = "reg query "; public static final String REG_SZ_TOKEN = "REG_SZ"; public static final String REG_BINARY = "REG_BINARY"; public static final String REG_DWORD_TOKEN = "REG_DWORD"; /** * Returns the value for an attribute of the registry in Windows. If you want to now the processor speed of the machine, you will pass * the following path: "HKLM\HARDWARE\DESCRIPTION\System\CentralProcessor\0" and the following attribute name: ~MHz * * @param path * - the registry path to the desired value * @param attributeName * - the name of the attribute or null for the default * @param attributeType * - the type of attribute (DWORD/SZ/...) default is REG_SZ * @return - the value for the attribute located in the given path */ public static String getRegistryValue(String path, String attributeName, String attributeType) { if (attributeType == null) { attributeType = REG_SZ_TOKEN; } try { if (!path.startsWith("\"")) { path = "\"" + path + "\""; } StringBuilder sb = new StringBuilder(); sb.append(REGQUERY_UTIL); sb.append(path); sb.append(' '); if (attributeName != null) { sb.append("/v "); sb.append(attributeName); } else { sb.append("/ve"); } Process process = Runtime.getRuntime().exec(sb.toString()); ConsoleReader reader = new ConsoleReader(process.getInputStream()); reader.start(); process.waitFor(); reader.join(); String result = reader.getResult(); int p = result.indexOf(attributeType); if (p == -1) { return null; } return result.substring(p + attributeType.length()).trim(); } catch (Exception e) { return null; } } public static class ConsoleReader extends Thread { private InputStream is; private StringWriter sw; ConsoleReader(InputStream is) { this.is = is; sw = new StringWriter(); } @Override public void run() { try { int c; while ((c = is.read()) != -1) { sw.write(c); } } catch (IOException e) { ; } } String getResult() { return sw.toString(); } } public static String getJDKHome() { String key = "\"HKEY_LOCAL_MACHINE\\SOFTWARE\\JavaSoft\\Java Development Kit\""; String currentVersionAtt = "CurrentVersion"; String javaHomeAtt = "JavaHome"; String res1 = getRegistryValue(key, currentVersionAtt, null); String res2 = getRegistryValue(key + "\\" + res1, javaHomeAtt, null); return res2; } public static void main(String s[]) { String key = "\"HKEY_LOCAL_MACHINE\\SOFTWARE\\JavaSoft\\Java Development Kit\""; String currentVersionAtt = "CurrentVersion"; String javaHomeAtt = "JavaHome"; String res1 = getRegistryValue(key, currentVersionAtt, null); String res2 = getRegistryValue(key + "\\" + res1, javaHomeAtt, null); System.out.println("CurrentVersion '" + res1 + "'"); System.out.println("JavaHome '" + res2 + "'"); } } 

Answer 2

这根本不可能，因为：

a。）你不知道desktop.browse（）启动了什么进程，

b。）你不知道browse（）开始的进程还有什么用处。

算了吧。 即使你能以某种方式破解它，它也永远无法可靠地工作。