java、xsd 和编组：jre bug，我的错还是 xsd 问题

Java、XSD和编组：JRE Bug，我的错还是XSD问题？

xml
  
    
      
        
        
        
      
    
  

java
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement
public class Student {
  private String name;
  private int age;
  private String gender;
  // getters and setters
}

java
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
public class Main {
  public static void main(String[] args) {
    try {
      // 创建JAXBContext
      JAXBContext jaxbContext = JAXBContext.newInstance(Student.class);
      // 创建Marshaller
      Marshaller marshaller = jaxbContext.createMarshaller();
      // 设置编组属性
      marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
      // 创建学生对象
      Student student = new Student();
      student.setName("John");
      student.setAge(20);
      student.setGender("Male");
      // 编组到XML文档
      marshaller.marshal(student, System.out);
    } catch (JAXBException e) {
      e.printStackTrace();
    }
  }
}