Use the Circe YAML framework to implement the data durable in the Java class library
Use the Circe YAML framework to implement the data durable in the Java class library
Overview:
Data persistence is a very important concept in computer science.It refers to saving the data into a certain lasting storage medium so that the data can be retained when the application is closed or restored.In Java development, we can use various persistent technologies, such as relational databases, file storage, cache, etc.This article will introduce how to use the Circe YAML framework to achieve the duration of data in the Java class library to provide readers with an example code to better understand.
Introduction to Circe YAML framework:
Circe YAML is a Java library that is used to sequence the Java object to YAML format and the derivative sequences into the Java object.YAML (Yaml Ain't Markup Language) is a human readable data serialization format, which is very suitable for configuration files and cross -language data exchange.
Example scene:
Suppose we are developing a student information management system. In this system, we need to keep the students' basic information for a long time.This information includes students' names, age, gender, etc.
Example code:
First, we need to introduce the dependency item of the Circe Yaml library in the pom.xml file of the project:
<dependency>
<groupId>io.github.java-yaml</groupId>
<artifactId>circe-yaml</artifactId>
<version>1.14</version>
</dependency>
Then we create a Student class to represent student information:
public class Student {
private String name;
private int age;
private String gender;
// Eliminate the constructor, Getter, and Setter method
@Override
public String toString() {
return "Student{" +
"name='" + name + '\'' +
", age=" + age +
", gender='" + gender + '\'' +
'}';
}
}
Next, we write a method to save student information to the yaml file:
import io.circe.syntax._
import io.circe.yaml.syntax._
import java.nio.file.Files;
import java.nio.file.Paths;
public class DataPersistenceUtil {
public static void saveStudentToFile(Student student, String filePath) throws IOException {
String yaml = student.asJson.asYaml.spaces2();
Files.write(Paths.get(filePath), yaml.getBytes());
System.out.println ("Student information has been saved to the file:" + filepath);
}
}
Finally, we can call the above method in the main program to save student information:
public class Main {
public static void main(String[] args) {
Student Student = New Student ("Zhang San", 18, "Male");
try {
DataPersistenceUtil.saveStudentToFile(student, "student.yaml");
} catch (IOException e) {
e.printStackTrace();
}
}
}
When we run the above code, student information will be saved in a Yaml file named "Student.yaml".After viewing the content of the file, we can see the following:
yaml
name: "Zhang San"
age: 18
Gender: "Man"
In this way, we successfully use the Circe Yaml framework to achieve the durable data in the Java library.
Summarize:
In this article, we introduced how to use the Circe YAML framework to achieve durable data in the Java library.By introducing the dependency item of the Circe Yaml library, create a Java object and serialize it into YAML format, we can save the data into the Yaml file.This method can easily persist data and deepen and read when needed.It is hoped that this article will help readers when realizing data persistence.
