java學習

1.公司和雇員的實體類

@XmlRootElement(name="company")

public class Company {
    //   @XmlElement(name="cname")
    private String cname;
    @XmlElement(name="employee")
    private List<Employee> employees;
       public Company(String cname,List<Employee> employees){
       this.cname=cname;
       this.employees=employees;
       }
       public Company(){}
    @XmlTransient
    public List<Employee> getEmployees() {
        return this.employees;
    }

    public void setEmployees(List<Employee> employees) {
        this.employees = employees;
    }
//    public void addEmployee(Employee employee){
//     if(employees==null){
//            this.employees=new ArrayList<Employee>();
//     }
//     this.employees.add(employee);
//    }

    public String getCname() {
        return this.cname;
    }

    public void setCname(String cname) {
        this.cname = cname;
    }
   
}

@XmlType

public class Employee {
    @XmlElement(name="name")
    private String name;
    @XmlElement(name="id")
    private String id;
    public Employee(String name,String id){
        this.id=id;
        this.name=name;
    }
    public Employee(){}
 @XmlTransient
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
 @XmlTransient
    public String getId() {
        return id;
    }

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

測試類：

public class Test {
      public static void main(String[] args){
        Test.test01();
    }
    public static void test01() {
        long l=System.currentTimeMillis();
  try {
   JAXBContext ctx = JAXBContext.newInstance(Company.class);
   Marshaller marshaller = ctx.createMarshaller();
                        List<Employee> list=new ArrayList<Employee>();
                        list.add(new Employee("1","1e"));
                        list.add(new Employee("2", "2e"));
   Company c = new Company("cc",list);
                        marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
          //  marshaller.marshal( c,new FileOutputStream("src/"+l+".xml"));
    StringWriter sw = new StringWriter();
   
      marshaller.marshal(c,sw);
      System.out.println(sw.toString());
      test02(sw.toString());
  //     Unmarshaller unmarshaller = ctx.createUnmarshaller();  
     //  File file = new File("src/"+l+".xml");  
     //  Company cc = (Company)unmarshaller.unmarshal(file);  
    // //  System.out.println(cc.getCname());  
    //   System.out.println(cc.getEmployees().get(0).getName());      
    //        System.out.println(file.exists()); 
  } catch (JAXBException e) {
   e.printStackTrace();
  }
 }
     public static void test02(String xml) {
  try {
  // String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?><company><employee><name>1</name><id>1e</id></employee><employee><name>2</name><id>2e</id></employee><cname>cc</cname></company>";
   JAXBContext ctx = JAXBContext.newInstance(Company.class);
   Unmarshaller um = ctx.createUnmarshaller();
   Company stu = (Company)um.unmarshal(new StringReader(xml));
   System.out.println(stu.getEmployees().get(0).getName() +","+stu.getCname());
  } catch (JAXBException e) {
   e.printStackTrace();
  }
  
 }
        public static void test03() {
            try{
             JAXBContext context = JAXBContext.newInstance(Company.class);  
        Unmarshaller unmarshaller = context.createUnmarshaller();  
        File file = new File("src/test.xml");  
        Company c = (Company)unmarshaller.unmarshal(file);  
        System.out.println(c.getCname());  
        System.out.println(c.getEmployees().get(0).getName());
            }catch (Exception e){
           
            }
            
       // System.out.println(people.age);  
        }
}