Java JSON 之 Xml 转 JSON 字符串

http://www.verejava.com/?id=16998704382152

下载依赖 jar 包   

json.jar 
dom4j-1.6.1.jar 
jaxen-1.1-beta-6.jar 

product.xml 

<product>
  <id>1</id>
  <name>电脑</name>
  <quantity>2</quantity>
  <price>4000</price>
</product>




package com.json19;

import java.io.File;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import org.json.JSONArray;

import com.json18.Product;

public class Test
{
    public static void main(String[] args)
    {
        List<Product> productList=new ArrayList<Product>();
        //SAXReader 读取  product.xml
        SAXReader reader=new SAXReader();
        try
        {
            Document doc=reader.read(new File("product.xml"));
            //根据路径 /data/product 获得 所有的 product element 元素集合
            List<Element> elementList=doc.selectNodes("/data/product");
            for(int i=0;i<elementList.size();i++)
            {
                /*
                 <product>
                    <id>1</id>
                    <name>电脑</name>
                    <quantity>2</quantity>
                    <price>4000</price>
                </product>
                 */
                Product product=new Product();
                Element element=elementList.get(i);
                //获得 product 下面的子元素
                Iterator<Element> childIter=element.elementIterator();
                while(childIter.hasNext())
                {
                    Element childElement=childIter.next();
                    if("id".equals(childElement.getName()))
                    {
                        product.setId(Integer.parseInt(childElement.getText()));
                    }else if("name".equals(childElement.getName()))
                    {
                        product.setName(childElement.getText());
                    }else if("quantity".equals(childElement.getName()))
                    {
                        product.setQuantity(Integer.parseInt(childElement.getText()));
                        
                    }else if("price".equals(childElement.getName()))
                    {
                        product.setPrice(Double.parseDouble(childElement.getText()));
                    }
                }
                
                //prodcut 存入 productList
                productList.add(product);
            }
            
            //productList 转化成  JSON 字符串
            JSONArray jsonArray=new JSONArray(productList);
            System.out.println(jsonArray.toString());
            
        } catch (DocumentException e)
        {
            e.printStackTrace();
        }
    }
}





package com.json20;

public class Product
{
    //产品(编号,产品名称,数量,价格)
    private int id;
    private String name;
    private int quantity;
    private double price;
    
    public Product(int id, String name, int quantity, double price)
    {
        super();
        this.id = id;
        this.name = name;
        this.quantity = quantity;
        this.price = price;
    }
    public Product()
    {
        super();
        this.id=100;
        System.out.println("物产构造方法调用");
    }
    public int getId()
    {
        return id;
    }
    public void setId(int id)
    {
        this.id = id;
    }
    public String getName()
    {
        return name;
    }
    public void setName(String name)
    {
        this.name = name;
    }
    public int getQuantity()
    {
        return quantity;
    }
    public void setQuantity(int quantity)
    {
        this.quantity = quantity;
    }
    public double getPrice()
    {
        return price;
    }
    public void setPrice(double price)
    {
        this.price = price;
    }
    
    
}

http://www.verejava.com/?id=16998704382152