Java中的目录侦听器

您可以使用JNotify

JNotify是一个Java库，允许Java应用程序侦听文件系统事件，例如：创建文件已修改文件已重命名文件已删除文件支持的平台

Windows（2000或更高版本）Windows注释支持INofity的Linux（2.6.14或更高版本）Linux注释Mac OS
X（10.5或更高版本）Mac OS注释

更多信息 ：

从这里下载JNotify

解压缩该zip文件，然后根据平台将.dll / .so放入您的lib路径中。并

jnotify-0.93.jar

样例代码：

package org.life.java.stackoverflow.questions;import net.contentobjects.jnotify.JNotify;import net.contentobjects.jnotify.JNotifyListener;public class JNotifyDemo {    public void sample() throws Exception {        // path to watch        String path = System.getProperty("user.home");        // watch mask, specify events you care about,        // or JNotify.FILE_ANY for all events.        int mask = JNotify.FILE_CREATED     | JNotify.FILE_DELETED     | JNotify.FILE_MODIFIED     | JNotify.FILE_RENAMED;        // watch subtree?        boolean watchSubtree = true;        // add actual watch        int watchID = JNotify.addWatch(path, mask, watchSubtree, new Listener());        // sleep a little, the application will exit if you        // don't (watching is asynchronous), depending on your        // application, this may not be required        Thread.sleep(1000000);        // to remove watch the watch        boolean res = JNotify.removeWatch(watchID);        if (!res) { // invalid watch ID specified.        }    }    class Listener implements JNotifyListener {        public void fileRenamed(int wd, String rootPath, String oldName,     String newName) { print("renamed " + rootPath + " : " + oldName + " -> " + newName);        }        public void fileModified(int wd, String rootPath, String name) { print("modified " + rootPath + " : " + name);        }        public void fileDeleted(int wd, String rootPath, String name) { print("deleted " + rootPath + " : " + name);        }        public void fileCreated(int wd, String rootPath, String name) { print("created " + rootPath + " : " + name);        }        void print(String msg) { System.err.println(msg);        }    }    public static void main(String[] args) throws Exception {        new JNotifyDemo().sample();    }}

输出：

modified C:documents and Settingsjigar: LOCALS~1Tempetilqs_4s8ywsvyukghK0uDxRopmodified C:documents and Settingsjigar : LOCALS~1Tempetilqs_4s8ywsvyukghK0uDxRopmodified C:documents and Settingsjigar : LOCALS~1Tempoutput1295531079119modified C:documents and Settingsjigar : Local SettingsApplication DataGoogleChromeUser DataDefaultdeleted C:documents and Settingsjigar : Local SettingsApplication DataGoogleChromeUser DataDefaultCachef_001ea9created C:documents and Settingsjigar : Local SettingsApplication DataGoogleChromeUser DataDefaultCachef_001eaemodified C:documents and Settingsjigar : LOCALS~1Tempetilqs_04gchL79ZJrpClZIqiommodified C:documents and Settingsjigar : LOCALS~1Tempetilqs_04gchL79ZJrpClZIqiommodified C:documents and Settingsjigar : Local SettingsApplication DataGoogleChromeUser DataDefaultCachemodified C:documents and Settingsjigar : Local SettingsApplication DataGoogleChromeUser DataDefaultCachef_001eaemodified C:documents and Settingsjigar : Local SettingsApplication DataGoogleChromeUser DataDefaultCachef_001eaemodified C:documents and Settingsjigar : LOCALS~1Tempoutput1295531079119modified C:documents and Settingsjigar : Local SettingsApplication DataGoogleChromeUser DataDefaultCurrent Sessiondeleted C:documents and Settingsjigar : Local SettingsApplication DataGoogleChromeUser DataDefaultCachef_001ea8created C:documents and Settingsjigar : Local SettingsApplication DataGoogleChromeUser DataDefaultCachef_001eafmodified C:documents and Settingsjigar : Local SettingsApplication DataGoogleChromeUser DataDefaultCachemodified C:documents and Settingsjigar : LOCALS~1Tempetilqs_04gchL79ZJrpClZIqiommodified C:documents and Settingsjigar : LOCALS~1Tempetilqs_04gchL79ZJrpClZIqiommodified C:documents and Settingsjigar : Local SettingsApplication DataGoogleChromeUser DataDefaultCachef_001eafmodified C:documents and Settingsjigar : Local SettingsApplication DataGoogleChromeUser DataDefaultCachef_001eaf