需求，递归输出某个目录下的所有日志文件，我们可以使用
commons-io进行处理，避免重复造轮子。
使用
依赖
compile group: 'commons-io', name: 'commons-io', version: '2.6'
测试
@Test
public void testFilters(){
String outFilePath = "./logdir2";
String fileFilters[] = {".log"};
IOFileFilter[] ioFileFilters = new IOFileFilter[fileFilters.length];
for (int i = 0; i < fileFilters.length; i++) {
ioFileFilters[i] = FileFilterUtils.suffixFileFilter(fileFilters[i]);
}
File file = new File(outFilePath);
if (file.isDirectory()) {
IOFileFilter foldFilter = FileFilterUtils.and(
FileFilterUtils.directoryFileFilter(),
HiddenFileFilter.VISIBLE);
IOFileFilter fileFilter = FileFilterUtils.and(ioFileFilters);
Collection<File> logFiles = FileUtils.listFiles(file, fileFilter, foldFilter);
for (File file1 : logFiles) {
System.out.println(file1.getName());
}
}
}
