java 中xml轉換為Bean執行個體解析（純程式碼）

最近用到，記錄一個自己寫的demo

1. 在根項目上使用@XmlRootElement註解，name為元素名

2. 子項目屬性使用@XmlElement，name為元素名

3. 若有屬性，例如<emplyee hobby="swim" >,則使用@XmlAttribute，name為屬性名稱

xml:

<?xml version="1.0" encoding="UTF-8"?><employees>    <employee>        <userId>johnsmith@company.com</userId>        <password>abc123_</password>        <name>John Smith</name>        <age>24</age>        <gender>Male</gender>    </employee>    <employee>        <userId>christinechen@company.com</userId>        <password>123456</password>        <name>Christine Chen</name>        <age>27</age>        <gender>Female</gender>    </employee></employees>

Employees:

import java.util.List;import javax.xml.bind.annotation.XmlElement;import javax.xml.bind.annotation.XmlRootElement;@XmlRootElement(name = "employees")public class Employees {    private List<Employee> eList;    @XmlElement(name = "employee")    public List<Employee> geteList() {        return eList;    }    public void seteList(List<Employee> eList) {        this.eList = eList;    }}

Employee:

import javax.xml.bind.annotation.XmlElement;public class Employee {    private String userId;    private String password;    private String name;    private String age;    private String gender;    @Override    public String toString() {        return "Employee [userId=" + userId + ", password=" + password                + ", name=" + name + ", age=" + age + ", gender=" + gender                + "]";    }    @XmlElement(name="userId")    public String getUserId() {        return userId;    }    public void setUserId(String userId) {        this.userId = userId;    }    @XmlElement(name="password")    public String getPassword() {        return password;    }    public void setPassword(String password) {        this.password = password;    }    @XmlElement(name="name")    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    @XmlElement(name="age")    public String getAge() {        return age;    }    public void setAge(String age) {        this.age = age;    }    @XmlElement(name="gender")    public String getGender() {        return gender;    }    public void setGender(String gender) {        this.gender = gender;    }}

解析類

 public static void main(String[] args) throws JAXBException {        JAXBContext context = JAXBContext.newInstance(Employees.class);        Unmarshaller createUnmarshaller = context.createUnmarshaller();        Object unmarshal = createUnmarshaller.unmarshal(                new File("D:/java/workspacedev/JavaTest/xml/employees.xml"));        Employees em = (Employees) unmarshal;        List<Employee> list = em.geteList();        for (Employee employee : list) {            System.out.println(employee);        }            }