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读取YAML文件并转换为Map的处理流程如下：

代码解释

import java.io.File;
import java.io.FileInputStream;
import java.util.Iterator;
import java.util.Map;
import org.yaml.snakeyaml.Yaml;
public class YAMLTest {
    public static void main(String[] args) throws Exception {
        // 读取YAML文件
        Yaml yaml = new Yaml();
        File file = new File("D:/test.yaml");
        Object load = yaml.load(new FileInputStream(file));
        // 另一种常见方法：直接读取资源文件
        // InputStream io = Thread.currentThread().getContextClassLoader().getResourceAsStream("application.yml");
        // Object load = yaml.load(io);
        System.out.println("加载结果：\n" + yaml.dump(load));
        System.out.println(" ############################################################################# ");
        // 将YAML文件转换为Map
   
    
        Map
    
      map = (Map
     
      ) yaml.load(new FileInputStream(file));
        System.out.println("转换后的Map:\n" + yaml.dump(map));
        System.out.println(" ############################################################################# ");
        // 遍历Map中的键值对
        Iterator
      
       
        > entryIterator = map.entrySet().iterator();
        while (entryIterator.hasNext()) {
            Map.Entry
        
          entry = entryIterator.next(); String key = entry.getKey(); Object value = entry.getValue(); if (key.equals("ip") || key.equals("port")) { String valueStr = (String) value; System.out.println("键值对：" + key + "：" + valueStr); } else { System.out.println("这是一个嵌套的Map结构，处理方式如下："); if (key.equals("server")) { Map
         
           subMap = (Map
          
           ) value; Iterator
           
            
             > subEntryIterator = subMap.entrySet().iterator(); while (subEntryIterator.hasNext()) { Map.Entry
             
               subEntry = subEntryIterator.next(); String subKey = subEntry.getKey(); Object subValue = subEntry.getValue(); if (subKey.equals("port2")) { System.out.println("子键：" + subKey + "：" + subValue); } } } else { System.out.println("普通键值对：" + key + "：" + value); } } System.out.println(" ############################################################################# "); } } }
             
            
           
          
         
        
       
      
     
    
   

运行结果展示

ip: 192.168.102.31
port: 7788
spring:
  application: {name: cruncherserver: {port2: 9000}}
monitor_nic:
  nic: {name: ethA, slot: 0, cpu: 0}
#############################################################################
这一行用于分隔代码输出和解释段
键值对：ip: 192.168.102.31
键值对：port: 7788
这是一个嵌套的Map结构，处理方式如下：
普通键值对：spring: {application={name=cruncher}}
键值对：server: {port=9000}
键值对：monitor_nic: {nic={name=ethA, slot=0, cpu=0}}

Maven依赖说明

   
    
    
        
     
      org.yaml
     
        
     
      snakeyaml
     
        
     
      1.26
     
    
    
   

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