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.xmlSAXReader 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 productListproductList.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