In -depth analysis of the technical principles of FS EXTRA framework in the Java class library
In -depth analysis of the technical principles of FS EXTRA framework in the Java class library
FS EXTRA is a Java class library that provides many functions for file operation and management.This article will in -depth analysis of the technical principles of the FS EXTRA framework, including its design principles, core functions and common usage.
1. Design principles
1. Simple and easy -to -use: The FS Extra framework considers the convenience of the development of the developer at the beginning of the design, so it provides a simple and intuitive API interface to reduce the learning cost and encoding difficulty of developers.
2. High configuration: The framework provides a rich configuration option to cope with different file operation requirements.Developers can configure various parameters according to their own needs, so as to flexibly implement the customization of file operations.
3. Strong scalability: The framework through modular design allows developers to easily expand functional expansion.Users can customize plug -ins, extensions and hooks to meet specific file operation requirements.
2. Core function
1. File operation: The FS EXTRA framework provides rich file operation functions, such as copying, moving, renamed, deleting files or directory.Developers can complete these operations through simply calling API without processing cumbersome underlying details.
The following is an example code for a copy of the file:
import java.io.File;
import java.io.IOException;
import org.apache.commons.io.FileUtils;
public class FileCopyExample {
public static void main(String[] args) {
File sourceFile = new File("path/to/source/file.txt");
File destFile = new File("path/to/destination/file.txt");
try {
FileUtils.copyFile(sourceFile, destFile);
System.out.println ("File replication is successful!"););
} catch (IOException e) {
System.err.println ("File copy failure:" + e.getMessage ());
}
}
}
2. File retrieval: The FS Extra framework provides a flexible file retrieval function. Developers can search for file search according to the file name, file type, file size and other conditions.At the same time, the framework also supports regular expressions and passages, making the file retrieval more flexible and powerful.
The following is a sample code search for file name:
import java.io.File;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.filefilter.WildcardFileFilter;
import org.apache.commons.io.filefilter.FileFilterUtils;
import java.io.IOException;
import java.util.Collection;
public class FileSearchExample {
public static void main(String[] args) {
File dir = new File("path/to/directory");
Collection<File> files = FileUtils.listFiles(dir, new WildcardFileFilter("*.txt"), FileFilterUtils.trueFileFilter());
for (File file : files) {
System.out.println(file.getPath());
}
}
}
3. File compression and decompression: The framework provides simple and easy -to -use file compression and decompression functions.Developers can use the API provided by the framework to compress and decompress the files and directory to support common compression formats.
Here are a sample code for file compression:
import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
import org.apache.commons.compress.archivers.tar.TarArchiveOutputStream;
import org.apache.commons.compress.utils.IOUtils;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.GZIPOutputStream;
public class FileCompressionExample {
public static void main(String[] args) {
String sourceFile = "path/to/source/file.txt";
String compressedFile = "path/to/compressed/file.tar.gz";
try (FileOutputStream fos = new FileOutputStream(compressedFile);
GZIPOutputStream gzos = new GZIPOutputStream(fos);
TarArchiveOutputStream taos = new TarArchiveOutputStream(gzos);
FileInputStream fis = new FileInputStream(sourceFile)) {
TarArchiveEntry entry = new TarArchiveEntry(sourceFile);
entry.setSize(fis.available());
taos.putArchiveEntry(entry);
IOUtils.copy(fis, taos);
taos.closeArchiveEntry();
System.out.println ("File compression is successful!");
} catch (IOException e) {
System.err.println ("File compression fails:" + e.getMessage ());
}
}
}
The above is only for some core functions. The FS EXTRA framework also provides more file operation functions and tool categories. Developers can use and expand according to specific business needs.
Third, common usage
1. File copy and move:
-Pocume files: Use the method of `Fileutils.copyfile (Source, Destination) to implement the file copy operation.
-Cop files: Use the method of `Fileutils.movefile (Source, Destination) to implement the file movement operation.
2. File delete:
-State files: Use the `FileUtils.Forcedelete (File) method to implement the file delete operation.
-State Directory: Use the `FileUtils.Deletedirectory (Directory) method to implement the delete operation of the directory.
3. File size acquisition:
-Coard the file size: Use the `FileUtils.sizeof (File) method to obtain the size of the specified file.
4. File read and write operation:
-File read: Use the method to read the content of the file as a string by using the method of using the `Fileutils.readFiletring) method.
-File writing: Use `Fileutils.WriteStringtofile (File, Data, Encoding)` method to write the specified string to the file.
The above is only a common usage example. The FS Extra framework also provides more rich file operation functions, providing more efficient and more convenient solutions.
Summary: The FS EXTRA framework is a powerful tool for file operation and management. It has the characteristics of simple and easy -to -use, height configuration, and strong scalability.Through this article, we have deeply analyzed the technical principles, core functions and common usage of the framework. We hope to help everyone better understand and apply the FS Extra framework.
