mock需要哪些知识点

最新推荐文章于 2025-03-05 20:29:59 发布

我是一个测试Q

最新推荐文章于 2025-03-05 20:29:59 发布

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本文链接：https://blog.youkuaiyun.com/j476091245/article/details/106531342

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监听配置文件的更新：commons-vfs

VFS

The main entry point for the VFS. Used to create {@link FileSystemManager} instances.

FileSystemManager

A FileSystemManager manages a set of file systems. This interface is used to locate a {@link FileObject} by name from one of those file systems.

A file system manager can recognise several types of file names

Absolute URI(file:/c:/somefile)

Absolute local file name(/home/someuser/a-file)

Relative path(../somefile)

FileSystemManager fsManager = VFS.getManager();
FileObject directoryObject = fsManager.resolveFile(absoluteDirectory.toURI());
DefaultFileMonitor fileMonitor = new DefaultFileMonitor(new VfsFileListener(listener));
fileMonitor.addFile(directoryObject);
fileMonitor.setRecursive(this.recursive);
if (started) {
    System.out.println("started");
    fileMonitor.start();
}

监听配置文件的更新：commons-io

可以用于实现配置文件的热部署

功能由三个组件组成:

监听器 FileAlterationListener

用于实现文件改变时触发的行为。

观察者 FileAlterationObserver

用于观察文件的改变，通知注册的监听器执行相应的事件。

监视器 FileAlterationMonitor

通过一线程，每间隔一段时间调用一次注册的观察者检查文件。

FileAlterationListener
public class FileAlterationReload extends FileAlterationListenerAdaptor {
    @Override
    public void onFileChange(File file) {
        System.out.println("文件改变了："+file.getName());
    }
    @Override
    public void onDirectoryChange(File directory) {
        System.out.println("onDirectoryChange："+directory.getName());
    }
}

FileAlterationObserver fileAlterationObserver = new FileAlterationObserver(new File(System.getProperty("user.dir")+"\\src\\test\\properties"));
FileAlterationListener fileAlterationListener =new FileAlterationReload();
//注册监听器
fileAlterationObserver.addListener(fileAlterationListener);
FileAlterationMonitor fileAlterationMonitor = new FileAlterationMonitor();
//注册观察者
fileAlterationMonitor.addObserver(fileAlterationObserver);
//启动监听
try {
    fileAlterationMonitor.start();
    System.out.println("開始監聽");
    //让主线程别这么快结束。
    Thread.sleep(1000000);
} catch (Exception e) {
    e.printStackTrace();
}

动态更新运行环境信息-Introspector

//找到field 的setter方法
BeanInfo beanInfo = Introspector.getBeanInfo(getClass(), Object.class);
System.out.println("findSetter-fieldLength:"+beanInfo.getPropertyDescriptors().length);
for (PropertyDescriptor propertyDescriptor : beanInfo.getPropertyDescriptors()) {
    if (propertyDescriptor.getName().equals(fieldName)) {
        method = propertyDescriptor.getWriteMethod();
break;
}
  return method;
//更新field的value
Method method = findSetter(fieldName);
  if (method != null) {
       if (newValue != null && !newValue.getClass().equals(method.getParameterTypes()[0])) {
      newValue = JSON.parseObject(newValue.toString(), method.getParameterTypes()[0]);
                }
                method.setAccessible(true);
                method.invoke(this, newValue);
                success = true;
else {
                Field field = ReflectionUtils.findField(this.getClass(), fieldName);
                if (field != null && (isPrimitive(field.getType()) || field.getType().equals(String.class))) {
                    field.setAccessible(true);
                    if (newValue != null && !newValue.getClass().equals(field.getType())) {
                        newValue = JSON.parseObject(newValue.toString(), field.getType());
                    }
                    field.set(this, newValue);
                    success = true;
后续再根据业务重置服务

----待续