Question

我正在尝试获取一个类（objectfactory.java）的所有数据对象（单独的变量，而不是其函数等），并且还调用本身的方法，这些方法创建了其他类的实例。相同的包，这样，列出给定包中所有类中的所有对象。（从透视的角度来看，这些是由JAXB创建的类）。

也就是说，我基本上想要做的是，迭代，并列出所有数据对象：

Objectfactory, and then,
- Person
- Name
- Url
- Link
- Personnel

类。

这是objectFactory类：

@XmlRegistry
public class ObjectFactory {

    private final static QName _Given_QNAME = new QName("", "given");
    private final static QName _Email_QNAME = new QName("", "email");
    private final static QName _Family_QNAME = new QName("", "family");

    /**
     * Create a new ObjectFactory that can be used to create new instances of schema derived classes for package: schema
     * 
     */
    public ObjectFactory() {
    }
    public Person createPerson() {
        return new Person();
    }

    public Name createName() {
        return new Name();
    }

    public Url createUrl() {
        return new Url();
    }

    public Link createLink() {
        return new Link();
    }

    public Personnel createPersonnel() {
        return new Personnel();
    }

    @XmlElementDecl(namespace = "", name = "given")
    public JAXBElement<String> createGiven(String value) {
        return new JAXBElement<String>(_Given_QNAME, String.class, null, value);
    }
    @XmlElementDecl(namespace = "", name = "email")
    public JAXBElement<String> createEmail(String value) {
        return new JAXBElement<String>(_Email_QNAME, String.class, null, value);
    }

    @XmlElementDecl(namespace = "", name = "family")
    public JAXBElement<String> createFamily(String value) {
        return new JAXBElement<String>(_Family_QNAME, String.class, null, value);
    }

}

我可以直接直到，直到ObjectFactory中的字段和方法使用Java Reflections。（getDeclaredFields（））等。

但是，对于其他类，我只能手动到达他们的对象。（例如，对于Class Link）

ObjectFactory factory= new ObjectFactory();
Field[] fields = factory.createLink().getClass().getDeclaredFields();

        Field[] fields1 = factory.createPerson().getClass().getDeclaredFields();

        for (Field f1 : fields1) {
            System.out.println("field name = " + f1.getName()); 
        }

但是，我想在运行时为objectfactory中的所有类执行此操作，而不是通过调用“createPerson（）”来手动执行此操作。

我尝试过这样的事情;

ObjectFactory factory= new ObjectFactory();
  Method[] methods = factory.getClass().getDeclaredMethods();
     for (Method m : methods) {
System.out.println("Class name = " + m.getName()); 
        Field[] subfields = m.getClass().getDeclaredFields();


        for (Field sf : subfields) {
            System.out.println("entities = " + sf.getName()); 
        }
        System.out.println("\n\n");

    }

但这不起作用。

我的预期输出是这样的：

Class name = ObjectFactory
    field name = _Given_QNAME
    field name = _Email_QNAME
    field name = _Family_QNAME

Class name = Person
    field name = Name
    field name = Age
    field name = Sex

Class name = Personnel
    field name = address
 ...

依旧......

我该怎么做？

Answer 1

public void getAllClassAndFields() {
    ObjectFactory objectFactory = new ObjectFactory();
    Method[] methods = objectFactory.getClass().getDeclaredMethods();
    for (Method method : methods) {
        try {
            // Check if method have XmlElementDecl annotation
            XmlElementDecl annotation = method.getAnnotation(XmlElementDecl.java);
            if (annotation == null) {
                // Invoke method only if it is not annoatated with XmlElementDecl 
                Object object = method.invoke(objectFactory, new Object[] {});
                System.out.println("Class Name = " + object.getClass().getName());
                printFileds(object);
            }

        } catch (Exception e) {
          // I used Exception to keep it simple, instead use appropriate exception types here 
        } 
    }
}

public static void printFileds(Object obj) {
    Field[] fields = obj.getClass().getFields();
    for (Field field : fields) {
        System.out.println("Field Name = " + field.getName());
    }
}

Answer 2

不确定你为什么要这样做？
但请尝试以下代码

public class RelectionTestCases {
public static final String INDENT = "    ";

public static void main(String[] args) throws IllegalArgumentException, IllegalAccessException, InvocationTargetException {
    ObjectFactory factory = new ObjectFactory();

    Field[] fields = ObjectFactory.class.getDeclaredFields();

    // Fields
    System.out.println(ObjectFactory.class.getName());
    for (Field field : fields) {
        System.out.println(INDENT + field.getName());
    }

    // Method
    Method[] methods = ObjectFactory.class.getDeclaredMethods();
    for (Method method : methods) {

        if (method.getReturnType().equals(JAXBElement.class)) {
            continue;
        }

        Object object = method.invoke(factory, null);
        System.out.println(object.getClass().getName());

        Field[] subFields = object.getClass().getDeclaredFields();

        for (Field field : subFields) {
            System.out.println(INDENT + field.getName());
        }
    }
}

}

如何使用Java迭代类及其成员类的对象

2 个答案: