用Castor进行java到xml的绑定

最新推荐文章于 2021-02-23 22:00:33 发布

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#java #xml #import #class #nokia #vector

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本文通过具体示例介绍如何使用Castor框架实现Java类与XML文档之间的相互转换，包括创建Inventory和Product类，并演示了串行化与反串行化的全过程。

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从Java类到XML的过程称为“串行化”，反之的过程成为“反串行化”。

Castor是绑定Java类和XML文档的框架名称。

比如我有一个Inventory类，用来描述产品目录：

import java.util.*;

public class Inventory {
    private String company;
    private Vector products = new Vector();

    public Inventory() {}

    public void setCompany(String company) {
        this.company = company;
    }

    public String getCompany() {
        return this.company;
    }

    public void addProduct(Product product) {
        products.add(product);
    }

    public Vector getProducts() {
        return this.products;
    }
}

还有一个Product类，用来描述产品信息：

public class Product {
    private String name;
    private String description;

    public Product() {}

    public void setName(String name) {
        this.name = name;
    }

    public String getName() {
        return this.name;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public String getDescription() {
        return this.description;
    }

    public String toString() {
        return "name: " + name + ", description: " + description;
    }

}

下面用InventoryManager类进行串行化/反串行化

import org.exolab.castor.mapping.*;
import org.exolab.castor.types.*;
import org.exolab.castor.xml.*;
import java.io.*;
import java.util.*;

public class InventoryManager {

    /**
     * @param args
     */
    public static void main(String[] args) {
        new InventoryManager();

    }

    public InventoryManager() {
        Inventory inventory = new Inventory();
        inventory.setCompany("ibm");

        Product product = new Product();
        product.setName("nokia");
        product.setDescription("handphone");

        inventory.addProduct(product);

        try {
            // 串行化，生成inventory.xml文件
            Writer writer = new FileWriter("inventory.xml");
            Marshaller.marshal(inventory, writer);

            // 反串行化，读取inventory.xml文件，生成inventory对象
            Unmarshaller unmarshaller = new Unmarshaller(Inventory.class);

            inventory = (Inventory)unmarshaller.unmarshal(new FileReader("inventory.xml"));

            // 打印对象信息
            System.out.println(inventory.getCompany());

            Vector products = inventory.getProducts();
            for (int i = 0; i < products.size(); i++) {
                product = (Product)products.get(i);
                System.out.println(product);
            }

        } catch(IOException ex) {
            System.out.println(ex);
        } catch (MarshalException ex) {
            System.out.println(ex);
        } catch (ValidationException ex) {
            System.out.println(ex);
        }

    }

}