Java 讀寫YAML

要自定義格式要另外新增class而不要將class置於某個class內

SnakeYAML Maven：

<dependency>
 <groupId>org.yaml</groupId>
 <artifactId>snakeyaml</artifactId>
 <version>1.21</version>
</dependency>

User.class：

/**User*/
public class User{

    /**name*/
    private String name;
    /**age*/
    private int age;

    /**
     * @param name Name
     */
    public void setName(String name){this.name=name;}
    /**
     * @return name
     */
    public String getName(){return this.name;}
    /**
     * @param age Age
     */
    public void setAge(int age){this.age=age;}
    /**
     * @return age
     */
    public int getAge(){return this.age;}
    
}

user.yaml：

{age: 20, name: cyfang}

Java Code：

import org.yaml.snakeyaml.Yaml;

import java.io.FileWriter;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class MyTest {
    public  static void main(String []args) throws IOException {

        //Write yaml
        String path = MyTest.class.getResource("").getPath()+"user.yaml";
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("name", "cyfang");
        map.put("age", 20);
        FileWriter writer = new FileWriter(path);

        Yaml yaml = new Yaml();
        yaml.dump(map, writer);
        writer.flush();
        writer.close();

        //read yaml
        User user = yaml.loadAs(MyTest.class.getResourceAsStream("user.yaml"), User.class);
        System.out.printf("%s %d\n",user.getName(), user.getAge());    
    }
}

執行結果：

參考資料：
https://www.baeldung.com/java-snake-yaml