Java JAXB解析属性位于单行上的xml文件

我有一个特定的xml文件（正是这种格式），我正试图用JAXB解析它 因为所有属性都在一行上，所以它看不到它们，并且在我的主函数中，所有字段都返回为null。如何正确解析xml的格式

<?xml version="1.0" encoding="UTF-8"?>
<employees>
<employee firstName="Asya" id="2" lastname="Olshansky"/>
</employees>

员工代码：

@XmlRootElement(name = "employees")
@XmlAccessorType(XmlAccessType.FIELD)
public class Employees {
    @XmlElement(name = "employee")
    List<Employee> employees = null;

    public List<Employee> getEmployees() {
        return employees;
    }

    public void setEmployees(List<Employee> list) {
        this.employees = list;
    }

}

尝试：

Employee.java:

public class Employee implements Serializable {
 
    private static final long serialVersionUID = 1L;
 
    private Integer id;
    private String firstName;
    private String lastName;
 
    public Employee() {
        super();
    }
    
    public Employee(Integer id, String firstName, String lastName) {
        super();
        this.id = id;
        this.firstName = firstName;
        this.lastName = lastName;
    }

    @XmlAttribute(name="id")
    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    @XmlAttribute(name="firstName")
    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    @XmlAttribute(name="lastname")
    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    @Override
    public String toString() {
        return "Employee [id=" + id + ", firstName=" + firstName + ", lastName=" + lastName + "]";
    }
   }

@XmlRootElement(name="employees")
public class Employees {
    
    List<Employee> employees;
    
    public Employees() {}
    
    public Employees(List<Employee> employees) {
        super();
        this.employees = employees;
    }

    @XmlElement(name="employee")
    public List<Employee> getEmployees() {
        return employees;
    }

    public void setEmployees(List<Employee> list) {
        this.employees = list;
    }

}

Employees.java:

public class Employee implements Serializable {
 
    private static final long serialVersionUID = 1L;
 
    private Integer id;
    private String firstName;
    private String lastName;
 
    public Employee() {
        super();
    }
    
    public Employee(Integer id, String firstName, String lastName) {
        super();
        this.id = id;
        this.firstName = firstName;
        this.lastName = lastName;
    }

    @XmlAttribute(name="id")
    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    @XmlAttribute(name="firstName")
    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    @XmlAttribute(name="lastname")
    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    @Override
    public String toString() {
        return "Employee [id=" + id + ", firstName=" + firstName + ", lastName=" + lastName + "]";
    }
   }

@XmlRootElement(name="employees")
public class Employees {
    
    List<Employee> employees;
    
    public Employees() {}
    
    public Employees(List<Employee> employees) {
        super();
        this.employees = employees;
    }

    @XmlElement(name="employee")
    public List<Employee> getEmployees() {
        return employees;
    }

    public void setEmployees(List<Employee> list) {
        this.employees = list;
    }

}

@XmlRootElement（name=“employees”）
公营雇员{
列出员工名单；
公职人员（）{}
公共雇员（名单雇员）{
超级（）；
这是。雇员=雇员；
}
@xmlement（name=“employee”）
公开名单{
返回员工；
}
公众雇员（名单）{
这是一份员工名单；
}
}

输出：

public class Employee implements Serializable {
 
    private static final long serialVersionUID = 1L;
 
    private Integer id;
    private String firstName;
    private String lastName;
 
    public Employee() {
        super();
    }
    
    public Employee(Integer id, String firstName, String lastName) {
        super();
        this.id = id;
        this.firstName = firstName;
        this.lastName = lastName;
    }

    @XmlAttribute(name="id")
    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    @XmlAttribute(name="firstName")
    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    @XmlAttribute(name="lastname")
    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    @Override
    public String toString() {
        return "Employee [id=" + id + ", firstName=" + firstName + ", lastName=" + lastName + "]";
    }
   }

@XmlRootElement(name="employees")
public class Employees {
    
    List<Employee> employees;
    
    public Employees() {}
    
    public Employees(List<Employee> employees) {
        super();
        this.employees = employees;
    }

    @XmlElement(name="employee")
    public List<Employee> getEmployees() {
        return employees;
    }

    public void setEmployees(List<Employee> list) {
        this.employees = list;
    }

}

注意：

public class Employee implements Serializable {
 
    private static final long serialVersionUID = 1L;
 
    private Integer id;
    private String firstName;
    private String lastName;
 
    public Employee() {
        super();
    }
    
    public Employee(Integer id, String firstName, String lastName) {
        super();
        this.id = id;
        this.firstName = firstName;
        this.lastName = lastName;
    }

    @XmlAttribute(name="id")
    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    @XmlAttribute(name="firstName")
    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    @XmlAttribute(name="lastname")
    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    @Override
    public String toString() {
        return "Employee [id=" + id + ", firstName=" + firstName + ", lastName=" + lastName + "]";
    }
   }

@XmlRootElement(name="employees")
public class Employees {
    
    List<Employee> employees;
    
    public Employees() {}
    
    public Employees(List<Employee> employees) {
        super();
        this.employees = employees;
    }

    @XmlElement(name="employee")
    public List<Employee> getEmployees() {
        return employees;
    }

    public void setEmployees(List<Employee> list) {
        this.employees = list;
    }

}

Main

中没有更改

更新了

员工

和

员工

课程

在

Employee

中添加了

@xmldattribute

，以映射属性名称和getter/setter

在

Employees

中添加了

@xmlement

，以映射

Employees

标记和构造函数中的每个

Employees

元素

---

你能解释一下为什么用@XmlAttribute代替@XmlElement吗？或者你能重定向到一个我可以阅读的来源吗it@Asa

@xmldattribute

在您的案例中用于属性，即

id

、

firstname

等，

@xmldelement

在您的案例中用于指示元素名称，即

employee

。让我知道如果你成功了是的成功了！我在哪里可以阅读更多关于它的信息以了解何时使用什么？