Java 如何用jaxb包装子列表

当尝试将customer->order 1:n关系映射到jaxb 2.2.6时，我希望 包装在单独节点“订单”中的订单列表

目前的结果是：

    <?xml version="1.0" encoding="UTF-8" standalone="yes"?> 
    <Customer>
       <id>100</id>
       <name>John Doe</name>
       <orders>
         <address>100 main street, smalltown, pa</address>
         <orderid>1100</orderid>
       </orders>
      <orders>
         <address>5 broadway, ny, ny</address>
         <orderid>1200</orderid>
       </orders> 
    </Customer>

TestCustomerWrite Junit4测试用例

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);

    }

}

---

这似乎起到了作用：

  @XmlElementWrapper(name="orders")
  @XmlElement(name="order", type=OrderJaxbDao.class)
  public List<Order> getOrders() { return orders; };

@xmlementwrapper（name=“orders”）
@xmlement（name=“order”，type=OrderJaxbDao.class）
public List getOrders（）{return orders；}；

改进的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<Order> orders=new ArrayList<Order>();

  /**
   * 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<Order> getOrders() { return orders; };

  /**
   * setter for orders
   * @param porders - new value for orders
   */
  public void setOrders(List<Order> porders) { orders=porders; };


} // CustomerJaxbDao

/**
*版权所有（C）2011-2012 BITPlan GmbH
* 
* http://www.bitplan.com
* 
*生成时间：2012-10-16 12:20使用smartGENERATOR
*/
包com.bitplan.testentity.jaxb；
导入javax.xml.bind.annotation.XmlRootElement；
导入javax.xml.bind.annotation.xmlement；
导入com.bitplan.testentity.Customer；
导入java.util.List；
导入com.bitplan.testentity.Order；
导入javax.xml.bind.annotation.XmlElementWrapper；
导入java.util.ArrayList；
/**
*面向客户的JaxB数据访问对象
*实体：集装箱测试客户
*表：客户
*/
@XmlRootElement（name=“客户”）
公共类CustomerJaxbDao实现Customer{
/**
*名字
*/
私有字符串名称；
/**
*身份证
*/
私人长id；
/**
*命令
*/
私有列表顺序=新的ArrayList（）；
/**
*名字的getter
*@returnname
*/
@xmlement（name=“name”）
公共字符串getName（）{return name；}；
/**
*名称设置器
*@param pname-名称的新值
*/
public void setName（字符串pname）{name=pname；}；
/**
*id的getter
*@returnid
*/
@xmlement（name=“id”）
public long getId（）{return id；}；
/**
*id设置器
*@param pid-id的新值
*/
public void setId（长pid）{id=pid；}；
/**
*订单获取者
*@退货订单
*/
@xmlementwrapper（name=“orders”）
@xmlement（name=“order”，type=OrderJaxbDao.class）
public List getOrders（）{return orders；}；
/**
*订单制定者
*@param porders-订单的新值
*/
公共无效设置顺序（列表顺序）{orders=porders；}；
}//CustomerJaxbDao

而不是

/**
 * getter for orders
 * @return orders
 */
@XmlElement(name="orders", type=OrderJaxbDao.class)
public List<Order> getOrders() { return orders; };

/**
*订单获取者
*@退货订单
*/
@xmlement（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<Order> getOrders() { return orders; };

/**
*订单获取者
*@退货订单
*/
@xmlement（name=“order”，type=OrderJaxbDao.class）
@xmlementwrapper（name=“orders”）
public List getOrders（）{return orders；}；

---

@xmlementwrapper

名称是包装元素（orders）的名称，

@xmlement

名称是包装（order）中每个条目元素的名称。

听起来您想在

CustomerJaxbDao

类中包装订单

@XmlElementWrapper( name="orders" )
@XmlElement(name="order", type=OrderJaxbDao.class)
public List<Order> getOrders() { return orders; };

@xmlementwrapper（name=“orders”）
@xmlement（name=“order”，type=OrderJaxbDao.class）
public List getOrders（）{return orders；}；

也许你想做什么就做什么

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);

    }

}

  @XmlElementWrapper(name="orders")
  @XmlElement(name="order", type=OrderJaxbDao.class)
  public List<Order> getOrders() { return orders; };

/**
 * 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<Order> orders=new ArrayList<Order>();

  /**
   * 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<Order> getOrders() { return orders; };

  /**
   * setter for orders
   * @param porders - new value for orders
   */
  public void setOrders(List<Order> porders) { orders=porders; };


} // CustomerJaxbDao

/**
 * getter for orders
 * @return orders
 */
@XmlElement(name="orders", type=OrderJaxbDao.class)
public List<Order> getOrders() { return orders; };

/**
 * getter for orders
 * @return orders
 */
@XmlElement(name="order", type=OrderJaxbDao.class)
@XmlElementWrapper(name="orders")
public List<Order> getOrders() { return orders; };

@XmlElementWrapper( name="orders" )
@XmlElement(name="order", type=OrderJaxbDao.class)
public List<Order> getOrders() { return orders; };