java正则表达式如何获取xml文件中指定节点的值

/**
     * 获取指定标签中的内容
     *
     * @param xml   传入的xml字符串
     * @param label 指定的标签
     */
    public static List<String> getFieldListByRegex(String xml, String label) {
        //正则表达式
        String regex = "<" + label + ">(.*?)</" + label + ">";
        Pattern pattern = Pattern.compile(regex);
        Matcher m = pattern.matcher(xml);
        //匹配的有多个
        List<String> fieldList = new ArrayList<>();
        while (m.find()) {
            if (StringUtils.isNotEmpty(m.group(1).trim())) {
                fieldList.add(m.group(1).trim());
            }
        }
        return fieldList;
    }

<areas><area>璃月</area></areas>

import org.junit.jupiter.api.Test;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class ReTest {
    @Test
    public void t1(){
        String xml = "<areas><area>璃月</area></areas>";
        Pattern compile = Pattern.compile("<area>(.*?)</area>");
        Matcher m = compile.matcher(xml);
        if (m.find()){
            System.out.println(m.group(0));
            System.out.println(m.group(1));
        }
    }
}

<area>璃月</area>
璃月

@Test
	public void t2(){
	    String xml = "<areas><area>璃月</area></areas>";
	    Pattern compile = Pattern.compile("<area>(?<area>.*?)</area>");
	    Matcher m = compile.matcher(xml);
	    if (m.find()){
	        System.out.println(m.group(0));
	        System.out.println("匿名分组:"+m.group(1));
	        System.out.println("命名分组:"+m.group("area"));
	    }
	}

<area>璃月</area>
匿名分组:璃月
命名分组:璃月

<areas><area>蒙德</area><area>璃月</area><area>稻妻</area><area>须弥</area></areas>

@Test
    public void t3(){
        String xml = "<areas><area>蒙德</area><area>璃月</area><area>稻妻</area><area>须弥</area></areas>";
        Pattern compile = Pattern.compile("<area>(?<area>.*?)</area>");
        Matcher m = compile.matcher(xml);
        int start = 0;
        while (m.find(start)){
            System.out.println(m.group(1));
            start = m.end(); // m.end() 返回当前到了哪个位置
        }
    }