如何用jaxb包装子列表
当试图映射客户 – >订单1：n关系与jaxb 2.2.6我想得到包含在单独节点“订单”中的订单列表。
目前的结果是：
100 John Doe 100 main street, smalltown, pa 1100 5 broadway, ny, ny 1200 但我想得到：
100 John Doe 100 main street, smalltown, pa 1100 5 broadway, ny, ny 1200
需要改变什么才能得到这个结果？
相关的源代码有：
- 客户界面
- CustomerJaxbDao实现
- 订单界面
- OrderJaxbDao实现
- TestCustomerWrite Junit4 Testcase
并使用此jaxb实现：
com.sun.xml.bind jaxb-impl 2.2.6
客户界面：
/** * Copyright (C) 2011-2012 BITPlan GmbH * * http://www.bitplan.com * * generated: 2012-10-15 15:12 with smartGENERATOR */ package com.bitplan.testentity; import java.util.List; import com.bitplan.testentity.Order; /** * interface for Customer */ public interface Customer { // >>>{interface}{Customer}{Customer} // no implementation yet !!! // <<<{interface}{Customer}{Customer} /** * getter for name * @return name */ public String getName(); /** * setter for name * @param pname - new value for name */ public void setName(String pname); /** * getter for id * @return id */ public long getId(); /** * setter for id * @param pid - new value for id */ public void setId(long pid); /** * getter for orders * @return orders */ public List getOrders(); /** * setter for orders * @param porders - new value for orders */ public void setOrders(List porders); } // Customer
订单界面：
/** * Copyright (C) 2011-2012 BITPlan GmbH * * http://www.bitplan.com * * generated: 2012-10-15 at 23:59 with smartGENERATOR */ package com.bitplan.testentity; /** * interface for Order */ public interface Order { // >>>{interface}{Order}{Order} // no implementation yet !!! // <<<{interface}{Order}{Order} /** * getter for orderid * @return orderid */ public long getOrderid(); /** * setter for orderid * @param porderid - new value for orderid */ public void setOrderid(long porderid); /** * getter for shipping address * @return address */ public String getAddress(); /** * setter for shipping address * @param paddress - new value for shipping address */ public void setAddress(String paddress); } // Order
CustomerJaxbDao实现
/** * Copyright (C) 2011-2012 BITPlan GmbH * * http://www.bitplan.com * * generated: 2012-10-15 at 23:51 with smartGENERATOR */ package com.bitplan.testentity.jaxb; import javax.xml.bind.annotation.XmlRootElement; import javax.xml.bind.annotation.XmlElement; import com.bitplan.testentity.Order; import com.bitplan.testentity.Customer; import java.util.List; import java.util.ArrayList; /** * JaxB Data access object for Customer * Entity: Customer for container testentity * Table: Customer */ @XmlRootElement(name="Customer") public class CustomerJaxbDao implements Customer { /** * name */ private String name; /** * id */ private long id; /** * orders */ private List orders=new ArrayList(); /** * getter for name * @return name */ @XmlElement(name="name") public String getName() { return name; }; /** * setter for name * @param pname - new value for name */ public void setName(String pname) { name=pname; }; /** * getter for id * @return id */ @XmlElement(name="id") public long getId() { return id; }; /** * setter for id * @param pid - new value for id */ public void setId(long pid) { id=pid; }; /** * getter for orders * @return orders */ @XmlElement(name="orders", type=OrderJaxbDao.class) public List getOrders() { return orders; }; /** * setter for orders * @param porders - new value for orders */ public void setOrders(List porders) { orders=porders; }; } // CustomerJaxbDao
OrderJaxbDao实现
/** * Copyright (C) 2011-2012 BITPlan GmbH * * http://www.bitplan.com * * generated: 2012-10-15 with smartGENERATOR */ package com.bitplan.testentity.jaxb; import javax.xml.bind.annotation.XmlRootElement; import javax.xml.bind.annotation.XmlElement; import com.bitplan.testentity.Order; /** * JaxB Data access object for Order * Entity: Order for container testentity * Table: Order */ @XmlRootElement(name="Order") public class OrderJaxbDao implements Order { /** * orderid */ private long orderid; /** * shipping address */ private String address; /** * getter for orderid * @return orderid */ @XmlElement(name="orderid") public long getOrderid() { return orderid; }; /** * setter for orderid * @param porderid - new value for orderid */ public void setOrderid(long porderid) { orderid=porderid; }; /** * getter for shipping address * @return address */ @XmlElement(name="address") public String getAddress() { return address; }; /** * setter for shipping address * @param paddress - new value for shipping address */ public void setAddress(String paddress) { address=paddress; }; } // OrderJaxbDao
TestCustomerWrite Junit4 Testcase
package com.bitplan.storage.jaxb; import static org.junit.Assert.*; import java.io.StringWriter; import javax.xml.bind.JAXBContext; import javax.xml.bind.JAXBException; import javax.xml.bind.Marshaller; import org.junit.Test; import com.bitplan.testentity.Customer; import com.bitplan.testentity.Order; import com.bitplan.testentity.jaxb.CustomerJaxbDao; import com.bitplan.testentity.jaxb.OrderJaxbDao; /** * * @author wf * */ public class TestCustomerWrite { @Test public void test() throws JAXBException { Customer customer=new CustomerJaxbDao(); customer.setId(100); customer.setName("John Doe"); long orderid=1000; String[] addresses={"100 main street, smalltown, pa","5 broadway, ny, ny"}; for (String address:addresses) { Order order=new OrderJaxbDao(); order.setAddress(address); order.setOrderid(orderid+=100); customer.getOrders().add(order); } JAXBContext jaxbContext = JAXBContext.newInstance(CustomerJaxbDao.class); Marshaller jaxbMarshaller = jaxbContext.createMarshaller(); // output pretty printed jaxbMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true); StringWriter sw=new StringWriter(); jaxbMarshaller.marshal(customer, sw); System.out.println(sw); } }
代替
/** * getter for orders * @return orders */ @XmlElement(name="orders", type=OrderJaxbDao.class) public List getOrders() { return orders; };
你需要
/** * getter for orders * @return orders */ @XmlElement(name="order", type=OrderJaxbDao.class) @XmlElementWrapper(name="orders") public List getOrders() { return orders; };
@XmlElementWrapper名称是包装元素（orders）的名称，@ @XmlElement名称是包装器（order）中每个条目元素的名称。
这似乎可以解决问题：
@XmlElementWrapper(name="orders") @XmlElement(name="order", type=OrderJaxbDao.class) public List getOrders() { return orders; };
改进了CustomerJaxbDao
/** * Copyright (C) 2011-2012 BITPlan GmbH * * http://www.bitplan.com * * generated: 2012-10-16 12:20 with smartGENERATOR */ package com.bitplan.testentity.jaxb; import javax.xml.bind.annotation.XmlRootElement; import javax.xml.bind.annotation.XmlElement; import com.bitplan.testentity.Customer; import java.util.List; import com.bitplan.testentity.Order; import javax.xml.bind.annotation.XmlElementWrapper; import java.util.ArrayList; /** * JaxB Data access object for Customer * Entity: Customer for container testentity * Table: Customer */ @XmlRootElement(name="Customer") public class CustomerJaxbDao implements Customer { /** * name */ private String name; /** * id */ private long id; /** * orders */ private List orders=new ArrayList (); /** * getter for name * @return name */ @XmlElement(name="name") public String getName() { return name; }; /** * setter for name * @param pname - new value for name */ public void setName(String pname) { name=pname; }; /** * getter for id * @return id */ @XmlElement(name="id") public long getId() { return id; }; /** * setter for id * @param pid - new value for id */ public void setId(long pid) { id=pid; }; /** * getter for orders * @return orders */ @XmlElementWrapper(name="orders") @XmlElement(name="order", type=OrderJaxbDao.class) public List getOrders() { return orders; }; /** * setter for orders * @param porders - new value for orders */ public void setOrders(List porders) { orders=porders; }; } // CustomerJaxbDao
听起来您想要在CustomerJaxbDao类中包装Order。
@XmlElementWrapper( name="orders" ) @XmlElement(name="order", type=OrderJaxbDao.class) public List getOrders() { return orders; };
可能做你想要的。