YAML Map 互转

快来打我* 2024-03-25 23:47 90阅读 0赞

## 依赖 ##

<dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.15.1</version>
    </dependency>
    # new ObjectMapper
    
    <dependency>
        <groupId>com.fasterxml.jackson.dataformat</groupId>
        <artifactId>jackson-dataformat-yaml</artifactId>
        <version>2.14.2</version>
    </dependency>
    # new YAMLFactory()
    
    <dependency>
        <groupId>org.yaml</groupId>
        <artifactId>snakeyaml</artifactId>
        <version>2.0</version>
    </dependency>
    # new Yaml

--------------------

## Yaml To Map ##

public static Map<String, Object> yamlToMap(String yamlStr) {
        
        if (StringUtils.isBlank(yamlStr)) {
        
            return new HashMap<>();
        }
        
        Map map = new HashMap<>();
        
        try {
        
            ObjectMapper objectMapper = new ObjectMapper(new YAMLFactory());
            map = objectMapper.readValue(yamlStr, Map.class);
        } catch (JsonProcessingException e) {
        
            log.info("yamlToMap occur error {}", e.getMessage());
        }
        
        return map;
    }

public static Map<String, Object> yamlToMap2(String yamlStr) {
        
        if (StringUtils.isBlank(yamlStr)) {
        
            return new HashMap<>();
        }
        
        # 启用安全构造器
        Yaml yaml = new Yaml(new SafeConstructor(new LoaderOptions()));
        return yaml.load(yamlStr);
    }

### UT ###

@Test
    public void testYamlToMap() {
        
        String str = "---\nkey1: value1\nkey2: value2\n...\n";
        Map<String, Object> map = YamlUtils.yamlToMap(str);
        Assert.assertEquals(2, map.size());
        Assert.assertEquals("{key1=value1, key2=value2}", map.toString());
    }
    
    @Test
    public void testYamlToMap2() {
        
        String str = "---\nkey1: value1\nkey2: value2\n...\n";
        Map<String, Object> map = YamlUtils.yamlToMap2(str);
        System.out.println(map);
        Assert.assertEquals(2, map.size());
        Assert.assertEquals("{key1=value1, key2=value2}", map.toString());
    }

--------------------

## Map To Yaml ##

public static String mapToYaml(Map<String, Object> map) {
        
        if (MapUtils.isEmpty(map)) {
        
            return EMPTY;
        }
        DumperOptions dumperOptions = new DumperOptions();
        dumperOptions.setExplicitStart(true);
        dumperOptions.setExplicitEnd(true);
        Yaml yaml = new Yaml(new SafeConstructor(new LoaderOptions()), new Representer(dumperOptions), dumperOptions);
        return yaml.dumpAsMap(map);
    }

### UT ###

@Test
    public void testMapToYaml() {
        
        Map<String, Object> map = new HashMap<>();
        map.put("key1", "value1");
        map.put("key2", "value2");
        String resStr = YamlUtils.mapToYaml(map);
        Assert.assertEquals("---\nkey1: value1\nkey2: value2\n...\n", resStr);
    }