ruoyi如何实现检测本地文件是否发生变化并且把变化同步给后端
时间: 2024-04-29 14:25:48 浏览: 13
Ruoyi可以使用Java NIO Watch Service来检测本地文件是否有变化,并使用HTTP协议将变化同步给后端。
下面是一个简单的示例代码,演示如何使用Watch Service来监视本地文件夹,并将文件变化同步给后端:
```java
public class FileWatcher {
private WatchService watchService;
private Path directory;
private HttpClient httpClient;
public FileWatcher(Path directory, HttpClient httpClient) {
this.directory = directory;
this.httpClient = httpClient;
}
public void start() throws IOException {
this.watchService = FileSystems.getDefault().newWatchService();
this.directory.register(watchService, StandardWatchEventKinds.ENTRY_CREATE, StandardWatchEventKinds.ENTRY_MODIFY, StandardWatchEventKinds.ENTRY_DELETE);
while (true) {
WatchKey key;
try {
key = watchService.take();
} catch (InterruptedException e) {
return;
}
for (WatchEvent<?> event : key.pollEvents()) {
WatchEvent.Kind<?> kind = event.kind();
if (kind == StandardWatchEventKinds.OVERFLOW) {
continue;
}
Path filename = directory.resolve((Path) event.context());
String action = kind.name();
// 发送HTTP请求将文件变化同步给后端
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create("http://backend.com/files"))
.header("Content-Type", "application/json")
.POST(HttpRequest.BodyPublishers.ofString("{ \"filename\": \"" + filename.toString() + "\", \"action\": \"" + action + "\" }"))
.build();
HttpResponse<String> response = httpClient.send(request, HttpResponse.BodyHandlers.ofString());
System.out.println(response.body());
}
key.reset();
}
}
}
```
以上示例代码使用了Java 11中的HttpClient来发送HTTP请求。在使用时,可以创建一个FileWatcher对象,并调用start()方法来开始监视文件夹。在文件发生变化时,会发送HTTP请求将变化同步给后端。