输出和读取yaml

╰+攻爆jí腚メ 2022-04-22 04:28 158阅读 0赞

### 1、引入依赖 ###

<dependency>
        <groupId>org.yaml</groupId>
        <artifactId>snakeyaml</artifactId>
        <version>1.18</version>
    </dependency>

### 2、定义对象 ###

import java.util.List;
    import java.util.Map;
    
    public class Model {
    	private Integer age;
    	private String name;
    	private Map<String, Object> params;
    	private List<String> favoriteBooks;
    
    	public Integer getAge() {
    		return age;
    	}
    
    	public void setAge(Integer age) {
    		this.age = age;
    	}
    
    	public String getName() {
    		return name;
    	}
    
    	public void setName(String name) {
    		this.name = name;
    	}
    
    	public Map<String, Object> getParams() {
    		return params;
    	}
    
    	public void setParams(Map<String, Object> params) {
    		this.params = params;
    	}
    
    	public List<String> getFavoriteBooks() {
    		return favoriteBooks;
    	}
    
    	public void setFavoriteBooks(List<String> favoriteBooks) {
    		this.favoriteBooks = favoriteBooks;
    	}
    }

### 3、输出yaml ###

@Test
    public void testDumpFile() throws IOException {
    	Model model = new Model();
    	model.setAge(12);
    	model.setName("张三");
    	List<String> list = Arrays.asList(new String[] { "aa", "bb" });
    	model.setFavoriteBooks(list);
    	Map<String, Object> params = new HashMap<>();
    	params.put("cc", "dd");
    	params.put("ee", "ff");
    	params.put("gg", "hh");
    	model.setParams(params);
    
    	DumperOptions options = new DumperOptions();
    	options.setDefaultFlowStyle(FlowStyle.BLOCK);
    	Yaml yaml = new Yaml(options);
    
    	FileWriter fw = new FileWriter(new File("d:/1.yml"));
    	yaml.dump(model, fw);
    }

### 4、解析yaml ###

@Test
    public void testParseYaml() throws FileNotFoundException {
    	Yaml yaml = new Yaml();
    	File file = new File("d:/1.yml");
    	Model model = yaml.loadAs(new FileInputStream(file), Model.class);
    	System.out.println(JSON.toJSONString(model));
    }