1. 一个Yaml工厂

public class YamlFactory {public static YamlUtil get(){return new YamlUtil();}
}

2.Yaml工具类

@Slf4j
public class YamlUtil {private Yaml yaml;public YamlUtil() {yaml = new Yaml(new Representer() {@Overrideprotected NodeTuple representJavaBeanProperty(Object javaBean, Property property, Object propertyValue,Tag customTag) {return propertyValue == null ? null: super.representJavaBeanProperty(javaBean, property, propertyValue, customTag);}});}public <T> T loadAs(String yaml, Class<T> type) {return this.yaml.loadAs(yaml, type);}public boolean write(Object obj, String path) {try (Writer writer = this.writer(path)) {this.dump(obj, writer);} catch (IOException e) {log.error("写入文件【{}】失败！", path);return false;}return true;}public boolean yamlFile(@NonNull Object obj, @NonNull String path) {try (Writer writer = this.writer(path)) {String yamlStr = this.yaml.dumpAsMap(obj);writer.write(yamlStr);writer.flush();log.info("写入文件: success, 文件路径:【{}】 ", path);} catch (IOException e) {log.error("写入文件: failed, 文件路径:【{}】 ", path);return false;}return true;}private void dump(Object obj, Writer writer) {this.yaml.dump(obj, writer);}private Writer writer(String path) {try {File file = new File(path);if (!file.exists()) {file.createNewFile();}return new PrintWriter(file);} catch (IOException e) {throw new RuntimeException(e);}}
}

3. 测试类

public class Test {public static void main1(String[] args) throws IOException {//String yamlStr = "name: John\nhobby:\n  - A\n  - B\n  - C\nscores:\n  chinese: 66\n  math: 61";//Me me = yaml.loadAs(yamlStr, Me.class);//System.out.println(me);ArrayList<String> hobby = new ArrayList<>();hobby.add("唱歌");hobby.add("跳舞");hobby.add("跑步");hobby.add("画画");HashMap<String, String> scores = new HashMap<>();scores.put("语文","88");scores.put("数学","91");scores.put("英语","56");ArrayList<Parent> parents = new ArrayList<>();parents.add(new Parent("111","mather"));parents.add(new Parent("222","father"));Me me_ = new Me("John", hobby, scores,parents);String filePath = "D:/test.yml";YamlFactory.get().yamlFile(me_,filePath);}public static void main(String[] args) {String path = "";//YamlFactory.get().yamlFile()}
}
@Data
@AllArgsConstructor
class Me{public String name;public List<String> hobby;public Map<String ,String> scores;public List<Parent> parents;
}@Data
@AllArgsConstructor
class Parent {public String name;public String role;
}

4. 完成 ！ OK