Guava (GOOGLE Common Libraares) input/output framework
Guava (GOOGLE Common Libraares) input/output framework
Guava is a collection of open source Java libraries developed by Google, which aims to provide efficient and convenient Java programming tools.One of the main modules is the input/output framework of Guava. It provides a set of functional tools and classes to simplify and improve the input and output operations in the Java program.
In Java programming, input and output operations are very common tasks, involving file reading and writing, database connection, network communication, and so on.Guava's input/output framework provides some tools to make these operations easier to achieve and manage.
Below are some of the main features and functions of the Guava input/output framework:
1. File operation: GUAVA provides a set of tools for file operations, including file reading, writing, copying, deleting, and moving.It also provides higher -level file processing functions, such as recursive search, filtration and operation files and directory.
The following code example shows how to read files with Guava and print its content:
import com.google.common.io.Files;
import java.io.File;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.List;
public class FileExample {
public static void main(String[] args) throws IOException {
File file = new File("path/to/file.txt");
List<String> lines = Files.readLines(file, StandardCharsets.UTF_8);
for (String line : lines) {
System.out.println(line);
}
}
}
2. Byte flow operation: GUAVA provides a set of tools for processing byte running.These tools can easily read, write, and convert the byte running.It also provides some high -level functions such as compression and decomposition of bytes.
The following code example shows how to use GUAVA to write the byte array to the file:
import com.google.common.io.Files;
import java.io.File;
import java.io.IOException;
public class ByteStreamExample {
public static void main(String[] args) throws IOException {
byte[] data = "Hello, Guava!".getBytes();
File file = new File("path/to/file.txt");
Files.write(data, file);
}
}
3. Character flow operation: Guava provides a set of tools for processing character streams.These tools can easily read, write and convert character streams.It also provides some high -level functions such as character coding and decoding.
The following code example shows how to use Guava to write the string to the file:
import com.google.common.base.Charsets;
import com.google.common.io.Files;
import java.io.File;
import java.io.IOException;
public class CharStreamExample {
public static void main(String[] args) throws IOException {
String content = "Hello, Guava!";
File file = new File("path/to/file.txt");
Files.write(content, file, Charsets.UTF_8);
}
}
Summary: GUAVA's input/output framework provides a set of convenient and powerful tools and classes for Java programmers to simplify and improve input and output operations.Whether it is file operation, byte flow operation or character stream operation, Guava provides flexible and efficient solutions.By learning and using Guava's input/output framework, developers can easily handle the input and output tasks in the Java program.
