无为

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    xmlns:po="http://www.example.com/PO" targetNamespace="http://www.example.com/PO">

    <xsd:element name="purchaseOrder" type="PurchaseOrderType"/>
    <xsd:element name="comment" type="xsd:string"/>

    <xsd:complexType name="PurchaseOrderType">
        <xsd:sequence>
            <xsd:element name="shipTo" type="USAddress"/>
            <xsd:element name="billTo" type="USAddress"/>
            <xsd:element ref="comment" minOccurs="0"/>
            <xsd:element name="items"  type="Items"/>
        </xsd:sequence>
        <xsd:attribute name="orderDate" type="xsd:date"/>
    </xsd:complexType>

    <xsd:complexType name="USAddress">
        <xsd:sequence>
            <xsd:element name="name"   type="xsd:string"/>
            <xsd:element name="street" type="xsd:string"/>
            <xsd:element name="city"   type="xsd:string"/>
            <xsd:element name="state"  type="xsd:string"/>
            <xsd:element name="zip"    type="xsd:decimal"/>
        </xsd:sequence>
        <xsd:attribute name="country" type="xsd:NMTOKEN" fixed="US"/>
    </xsd:complexType>

    <xsd:complexType name="Items">
        <xsd:sequence>
            <xsd:element name="item" minOccurs="0" maxOccurs="unbounded">
                <xsd:complexType>
                    <xsd:sequence>
                        <xsd:element name="productName" type="xsd:string"/>
                        <xsd:element name="quantity">
                            <xsd:simpleType>
                                <xsd:restriction base="xsd:positiveInteger">
                                    <xsd:maxExclusive value="100"/>
                                </xsd:restriction>
                            </xsd:simpleType>
                        </xsd:element>
                        <xsd:element name="USPrice"  type="xsd:decimal"/>
                        <xsd:element ref="comment"   minOccurs="0"/>
                        <xsd:element name="shipDate" type="xsd:date" minOccurs="0"/>
                    </xsd:sequence>
                    <xsd:attribute name="partNum" type="po:SKU" use="required"/>
                </xsd:complexType>
            </xsd:element>
        </xsd:sequence>
    </xsd:complexType>
    <xsd:simpleType name="SKU">
        <xsd:restriction base="xsd:string">
            <xsd:pattern value="\d{3}-[A-Z]{2}"/>
        </xsd:restriction>
    </xsd:simpleType>

/**
 * Author:	Fuhwei Lwo
 */
import java.io.FileOutputStream;
import java.io.FileInputStream;
import java.io.OutputStream;

import commonj.sdo.DataObject;
import commonj.sdo.helper.DataFactory;
import commonj.sdo.helper.XMLHelper;
import commonj.sdo.helper.XSDHelper;

public class CreatePurchaseOrder {
  private static final String PO_MODEL = "po.xsd";
  private static final String PO_NAMESPACE = "http://www.example.com/PO";
  private static final String PO_XML = "po.xml";

	private static void definePOTypes() throws Exception {
	 FileInputStream fis = new FileInputStream(PO_MODEL);
	 XSDHelper.INSTANCE.define(fis, null);
	 fis.close();
	}

	public static void main(String[] args) throws Exception {
	 definePOTypes();
      
	 DataObject purchaseOrder = 
	   DataFactory.INSTANCE.create(PO_NAMESPACE, "PurchaseOrderType");
		
	 purchaseOrder.setString("orderDate", "1999-10-20");
		
	 DataObject shipTo = purchaseOrder.createDataObject("shipTo");
	 shipTo.set("country", "US");
	 shipTo.set("name", "Alice Smith");
	 shipTo.set("street", "123 Maple Street");
	 shipTo.set("city", "Mill Valley");
	 shipTo.set("state", "CA");
	 shipTo.setString("zip", "90952");
	 DataObject billTo = purchaseOrder.createDataObject("billTo");
	 billTo.set("country", "US");
	 billTo.set("name", "Robert Smith");
	 billTo.set("street", "8 Oak Avenue");
	 billTo.set("city", "Mill Valley");
	 billTo.set("state", "PA");
	 billTo.setString("zip", "95819");
	 purchaseOrder.set("comment", "Hurry, my lawn is going wild!");
		
	 DataObject items = purchaseOrder.createDataObject("items");
		
	 DataObject item1 = items.createDataObject("item");
	 item1.set("partNum", "872-AA");
	 item1.set("productName", "Lawnmower");
	 item1.setInt("quantity", 1);
	 item1.setString("USPrice", "148.95");
	 item1.set("comment", "Confirm this is electric");
		
	 DataObject item2 = items.createDataObject("item");
	 item2.set("partNum", "926-AA");
	 item2.set("productName", "Baby Monitor");
	 iteim2.setInt("quantity", 1);
	 item2.setString("USPrice", "39.98");
	 item2.setString("shipDate", "1999-05-21");
		
	 OutputStream stream = new FileOutputStream(PO_XML);
	 XMLHelper.INSTANCE.save(purchaseOrder, PO_NAMESPACE, "purchaseOrder", stream);
	}
}

<?xml version="1.0" encoding="ASCII"?>
<po:purchaseOrder xmlns:po="http://www.example.com/PO" orderDate="1999-10-20">
  <shipTo country="US">
    <name>Alice Smith</name>
    <street>123 Maple Street</street>
    <city>Mill Valley</city>
    <state>CA</state>
    <zip>90952</zip>
  </shipTo>
  <billTo country="US">
    <name>Robert Smith</name>
    <street>8 Oak Avenue</street>
    <city>Mill Valley</city>
    <state>PA</state>
    <zip>95819</zip>
  </billTo>
  <comment>Hurry, my lawn is going wild!</comment>
  <items>
    <item partNum="872-AA">
      <productName>Lawnmower</productName>
      <quantity>1</quantity>
      <USPrice>148.95</USPrice>
      <comment>Confirm this is electric</comment>
    </item>
    <item partNum="926-AA">
      <productName>Baby Monitor</productName>
      <quantity>1</quantity>
      <USPrice>39.98</USPrice>
      <shipDate>1999-05-21</shipDate>
    </item>
  </items>
</po:purchaseOrder>

/**
/**
 * Author:	Fuhwei Lwo
 */
import java.io.FileInputStream;
import java.util.List;

import commonj.sdo.DataObject;
import commonj.sdo.helper.XMLDocument;
import commonj.sdo.helper.XMLHelper;
import commonj.sdo.helper.XSDHelper;


public class ReadPurchaseOrder {
 private static final String PO_MODEL = "po.xsd";
 private static final String PO_XML = "po.xml";

	private static void definePOTypes() throws Exception {
	  FileInputStream fis = new FileInputStream(PO_MODEL);
	  XSDHelper.INSTANCE.define(fis, null);
	  fis.close();
        }

	public static void main(String[] args) throws Exception {
 	  definePOTypes();

 	  FileInputStream fis = new FileInputStream(PO_XML);

 	  XMLDocument xmlDoc = XMLHelper.INSTANCE.load(fis);

 	  DataObject purchaseOrder = xmlDoc.getRootObject();
 	  
           System.out.println("Order date: " + purchaseOrder.get("orderDate"));
          System.out.println("Comment: " + purchaseOrder.get("comment"));

 	  DataObject shipTo = purchaseOrder.getDataObject("shipTo");
 	  System.out.println("Ship to name: " + shipTo.get("name"));

	  DataObject billTo = purchaseOrder.getDataObject("billTo");
           System.out.println("Bill to name: " + billTo.get("name"));
          System.out.println();

            DataObject items = purchaseOrder.getDataObject("items");
            List itemList = items.getList("item");
            for (int i=0; i<itemList.size(); i++) {
        
		       DataObject item = (DataObject)itemList.get(i);
			
		       System.out.println("Part num: " + item.get("partNum"));S
		      System.out.println("Product name: " + item.get("productName"));
    } // for
  }
}