Java读取yaml数据

YAML

YAML 数据结构可以用类似大纲的缩排方式呈现，结构通过缩进来表示，连续的项目通过减号“-”来表示，map结构里面的key/value对用冒号“:”来分隔。

下面介绍两种 Java 读取 Yaml 内容的方式：

1.SnakeYaml

忽略注释的方式，读写会导致注释丢失

• 在pom.xml加入snakeyaml依赖：

                org.yaml    snakeyaml    1.29      

• 具体java代码：

public class YamlUtils {    private static final Logger logger = LoggerFactory.getLogger(YamlUtils.class);    // yml2Map: Yaml to Map, 将yaml文件读为map    public static Map yml2Map(String path) throws FileNotFoundException {        FileInputStream fileInputStream = new FileInputStream(path);        Yaml yaml = new Yaml();        Map ret = (Map) yaml.load(fileInputStream);        return ret;    }    // map2Yml: Map to Yaml, 将map转换为yaml格式    public static void map2Yml(Map map, String path) throws IOException {        File file = new File(path);        FileWriter fileWriter = new FileWriter(file);        DumperOptions options = new DumperOptions();        options.setDefaultFlowStyle(DumperOptions.FlowStyle.BLOCK);        Yaml yaml = new Yaml(options);        yaml.dump(map, fileWriter);    } }

2.eo-yaml:

• 支持注释读写的yaml包；
• 读取的时候，生成节点，在每一个节点上保存相应的注释；
• 写入的时候，根据节点，重新添加相应的注释；

    com.amihaiemil.web    eo-yaml    4.3.5

YamlMapping team = Yaml.createYamlInput(    new File(path)).readYamlMapping();String architect = team.string("architect");YamlSequence devs = team.yamlSequence("developers");YamlSequence devops = team.yamlSequence("devops");

Map grades = new HashMap<>();grades.put("Math", 9);grades.put("CS", 10);YamlMapping student = Yaml.createYamlDump(    new Student ("John", "Doe", 20, grades)).dumpMapping();

来源地址：https://blog.csdn.net/twi_twi/article/details/129949480