XSream转换实体类，下划线不能成功转换？

Question

题目描述

题目来源及自己的思路

相关代码

实体类

@Data
@XStreamAlias("student")
public class Students {
    @XStreamAlias("name")
    @XStreamAsAttribute
    private String name;

    @XStreamAlias("age")
    @XStreamAsAttribute
    private String age;

    @XStreamAlias("mrch_id")
    @XStreamAsAttribute
    private String mrchId;

}

转化工具和测试

public class XstreamUtil {
    public static final String XmlHeader = "<?xml version=\"1.0\" encoding=\"UTF-8\"?> \n";
    public static Object toXml(Class<?> clazz, Object obj){
        Object xmlObject = null;
        //不对特殊字符进行转换，防止双下划线问题
        XStream xStream = new XStream(new Xpp3Driver(new NoNameCoder()));
        //使用传过来类的注解
        xStream.processAnnotations(clazz);
        //自动检测注解
        xStream.autodetectAnnotations(true);
        //序列化对象到xml
        xmlObject = xStream.toXML(obj);
        return XmlHeader + xmlObject;
    }

    public static Object toBean(Class<?> clazz, String xml) {
        Object xmlObject = null;
        XStream xstream = new XStream();
        //由于对象默认开启安全防护，添加这条语句解决问题。尽量限制最低权限。防止com.thoughtworks.xstream.security.ForbiddenClassException
        xstream.addPermission(AnyTypePermission.ANY);
        xstream.processAnnotations(clazz);
        xstream.autodetectAnnotations(true);
        xmlObject= xstream.fromXML(xml);
        return xmlObject;
    }
    public static void main(String[] args) {
        Students students = new Students();
        students.setAge("15");
        students.setName("张三");
        students.setMrchId("ssss");
        Object o = toXml(Students.class, students);
        System.out.println(o);
        Students o1 =(Students) toBean(Students.class,(String) o);
        System.out.println(o1);
    }
}

结果：
<?xml version="1.0" encoding="UTF-8"?>
<student name="张三" age="15" mrch_id="ssss"/>
Students(name=张三, age=15, mrchId=null)