Java class library: shallow analysis of the technical principle of simple YAML framework
Java class library: shallow analysis of the technical principle of simple YAML framework
Summary: Yaml (also known as Yaml Ain'T Markup Language) is a human readable data serialization format that is widely used in configuration files and data exchange.This article will introduce the technical principles of a simple Java YAML class library and provide related Java code examples.
introduction:
With the rapid development of software development, configuration files and data exchange become more and more important.As a simple and easy -to -read data serialization format, YAML played an important role in this regard.The YAML class library based on the Java language allows us to easily analyze and generate YAML files.This article will explore a simple technical principle of a simple YAML framework and provide examples of Java code to help us understand.
1. The basic concept of YAML
1. YAML syntax: YAML uses a python -style indentation hierarchical structure.It uses a space to shrink in to indicate the hierarchical relationship, use the colon to indicate the key value pair, and use the fragments to indicate the array.YAML also supports comments and embedded objects.
2. YAML data type: YAML supports a variety of data types, including scales (string, numbers, Boolean values, etc.), sequence (array) and mapping (key value pair).
3. YAML specification: YAML standard specifications consist of YAML grammar rules, YAML tags, and YAML transfers.
2. YAML class library in Java
Java provides a variety of YAML libraries, such as Snakeyaml and Yamlbeans.In this article, we will use the Snakeyaml library as an example.
Third, the technical principles of the Snakeyaml library
1. Import the Snakeyaml library: Using the Snakeyaml library in the Java project, you need to introduce related dependencies first.
<dependency>
<groupId>org.yaml</groupId>
<artifactId>snakeyaml</artifactId>
<version>1.27</version>
</dependency>
2. Analyze YAML file: Use the Snakeyaml library to easily analyze the YAML file and convert it to the Java object.The following example demonstrates how to analyze the yaml file:
import org.yaml.snakeyaml.Yaml;
public class YamlParser {
public static void main(String[] args) {
Yaml yaml = new Yaml();
String yamlString = "key: value";
Object data = yaml.load(yamlString);
System.out.println(data);
}
}
3. Generate yaml file: Snakeyaml library also allows us to generate the corresponding YAML file according to the Java object.The following example demonstrates how to generate YAML files:
import org.yaml.snakeyaml.Yaml;
public class YamlGenerator {
public static void main(String[] args) {
Yaml yaml = new Yaml();
Object data = new object (); // replace it with the actual Java object
String yamlString = yaml.dump(data);
System.out.println(yamlString);
}
}
Fourth, summary
This article briefly introduces the basic concepts of YAML, and discusses a simple technical principle of Snakeyaml Snakeyaml.By analyzing and generating examples of YAML files, we can better understand how to use YAML class libraries in the Java project.In practical applications, we can choose the appropriate YAML class library according to the needs of the project and make customized development according to the specific situation.I hope this article can provide some help to readers to understand and use the YAML class library.
references:
1. Snakeyaml official website: https://bitbucket.org/asomov/snakeyaml/wiki/home
