我有几种情况，其中 JAXB 从 xsd 文件生成的类具有一系列类列表，其中还包含类列表。生成的类在处理这些情况时使用静态内部类，但这会导致一个类多次存在多个实例。
例如，我有一个存在于多个 xsd 文件中的 Parameter 类。在每个实例中，这个参数类都是相同的，并且包含一个键值对。当为这些 xsd 文件中的每一个生成代码时，每个生成的类都包含一个名为 Parameter 的内部类。
为了减少冗余，我从所有生成的类中删除了 Parameter 类，重新实现它，并更新了所有引用。这按预期工作
当我有另一个类（例如LogicalDevice）也在多个类中实现时，就会出现问题。LogicalDevice 包含一个 ParameterList。当LogicalDevice被提取到自己的类中，并更新引用时，只维护Parameter类中的第一个属性，其余为null。
这让我相信静态内部类有一些特别之处。
供参考的是我的xml和代码
<Jetstream xmlns="http://Jetstream.TersoSolutions.com/v1.1/GetPoliciesResponse">
<Header/>
<GetPoliciesResponse>
<PolicyList>
<Policy Id="53bb663f-7ed0-41f8-9757-90ad4e015995" Name="MyPolicy"
DeviceDefinitionId="f3536a6d-4610-4d56-82d9-54fd6602a883" >
<ParameterList>
<Parameter Name="aggregateeventscancount" Value="2"/>
<Parameter Name="aggregateeventscantime" Value="10"/>
<Parameter Name="antenna1rxsensitivity" Value="50"/>
<Parameter Name="antenna1txpower" Value="30"/>
<Parameter Name="antenna2rxsensitivity" Value="50"/>
<Parameter Name="antenna2txpower" Value="30"/>
<Parameter Name="antenna3rxsensitivity" Value="50"/>
<Parameter Name="antenna3txpower" Value="30"/>
<Parameter Name="antenna4rxsensitivity" Value="50"/>
<Parameter Name="antenna4txpower" Value="30"/>
<Parameter Name="commandpollinterval" Value="60"/>
<Parameter Name="dns" Value="0.0.0.0"/>
<Parameter Name="dooropentimelimit" Value="300"/>
<Parameter Name="gateway" Value="0.0.0.0"/>
<Parameter Name="ip" Value="0.0.0.0"/>
<Parameter Name="jetstreamdeviceurl" Value="https://us-device.tersosolutions.com/v1.0/device/"/>
<Parameter Name="lockdownhightemp" Value="127"/>
<Parameter Name="lockdownonacpowerfailure" Value="0"/>
<Parameter Name="lockdownonreaderfailure" Value="0"/>
<Parameter Name="lockdownonhightemp" Value="0"/>
<Parameter Name="logentryeventhightemp" Value="127"/>
<Parameter Name="logentryeventlowtemp" Value="-128"/>
<Parameter Name="numberofantennas" Value="4"/>
<Parameter Name="logentrylevel" Value="Warning"/>
<Parameter Name="objecteventscancount" Value="2"/>
<Parameter Name="objecteventscantime" Value="10"/>
<Parameter Name="Subnet" Value="0.0.0.0"/>
</ParameterList>
<LogicalDeviceList>
<LogicalDevice LogicalDeviceId="MyDevice">
<ParameterList>
<Parameter Name="ip" value="192.168.91.100" />
<Parameter Name="subnet" value="255.255.255.0" />
<Parameter Name="gateway" value="192.168.91.1" />
<Parameter Name="dns" value="192.168.91.2" />
</ParameterList>
</LogicalDevice>
</LogicalDeviceList>
</Policy>
</PolicyList>
</GetPoliciesResponse>
</Jetstream>
以下是修改后的生成代码，参考更新。
//
// This file was generated by the JavaTM Architecture for XML Binding(JAXB) Reference Implementation, v2.2.7
// See <a href="http://java.sun.com/xml/jaxb">http://java.sun.com/xml/jaxb</a>
// Any modifications to this file will be lost upon recompilation of the source schema.
// Generated on: 2013.09.09 at 10:24:32 AM CDT
//
package com.TersoSolutions.Jetstream.SDK.XML.Model.GetPoliciesResponse;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAnyAttribute;
import javax.xml.bind.annotation.XmlAnyElement;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;
import javax.xml.namespace.QName;
import com.TersoSolutions.Jetstream.SDK.XML.LogicalDeviceList;
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "Jetstream", propOrder = {
"header",
"getPoliciesResponse"
})
@XmlRootElement(name = "Jetstream")
public class Jetstream {
@XmlElement(name = "Header", required = true)
protected Jetstream.Header header;
@XmlElement(name = "GetPoliciesResponse", required = true)
protected Jetstream.GetPoliciesResponse getPoliciesResponse;
/**
* Gets the value of the header property.
*
* @return
* possible object is
* {@link Jetstream.Header }
*
*/
public Jetstream.Header getHeader() {
return header;
}
/**
* Gets the value of the getPoliciesResponse property.
*
* @return
* possible object is
* {@link Jetstream.GetPoliciesResponse }
*
*/
public Jetstream.GetPoliciesResponse getGetPoliciesResponse() {
return getPoliciesResponse;
}
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "GetPoliciesResponse", propOrder = {
"policyList",
"any"
})
public static class GetPoliciesResponse {
@XmlElement(name = "PolicyList", required = true)
protected Jetstream.GetPoliciesResponse.PolicyList policyList;
@XmlAnyElement(lax = true)
protected List<Object> any;
@XmlAnyAttribute
private Map<QName, String> otherAttributes = new HashMap<QName, String>();
/**
* Gets the value of the policyList property.
*
* @return
* possible object is
* {@link Jetstream.GetPoliciesResponse.PolicyList }
*
*/
public Jetstream.GetPoliciesResponse.PolicyList getPolicyList() {
return policyList;
}
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "PolicyList", propOrder = {
"policy"
})
public static class PolicyList {
@XmlElement(name = "Policy")
protected List<Jetstream.GetPoliciesResponse.PolicyList.Policy> policy;
/**
* Gets the value of the policy property.
*
* <p>
* This accessor method returns a reference to the live list,
* not a snapshot. Therefore any modification you make to the
* returned list will be present inside the JAXB object.
* This is why there is not a <CODE>set</CODE> method for the policy property.
*
* <p>
* For example, to add a new item, do as follows:
* <pre>
* getPolicy().add(newItem);
* </pre>
*
*
* <p>
* Objects of the following type(s) are allowed in the list
* {@link Jetstream.GetPoliciesResponse.PolicyList.Policy }
*
*
*/
public List<Jetstream.GetPoliciesResponse.PolicyList.Policy> getPolicy() {
if (policy == null) {
policy = new ArrayList<Jetstream.GetPoliciesResponse.PolicyList.Policy>();
}
return this.policy;
}
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "Policy", propOrder = {
"parameterList",
"logicalDeviceList",
"any"
})
public static class Policy {
@XmlElement(name = "ParameterList", required = true)
protected com.TersoSolutions.Jetstream.SDK.XML.ParameterList parameterList;
@XmlElement(name = "LogicalDeviceList", required = true)
protected LogicalDeviceList logicalDeviceList;
@XmlAnyElement(lax = true)
protected List<Object> any;
@XmlAttribute(name = "Id", required = true)
protected String id;
@XmlAttribute(name = "Name", required = true)
protected String name;
@XmlAttribute(name = "DeviceDefinitionId", required = true)
protected String deviceDefinitionId;
@XmlAnyAttribute
private Map<QName, String> otherAttributes = new HashMap<QName, String>();
/**
* Gets the value of the parameterList property.
*
* @return
* possible object is
* {@link Jetstream.GetPoliciesResponse.PolicyList.Policy.ParameterList }
*
*/
public com.TersoSolutions.Jetstream.SDK.XML.ParameterList getParameterList() {
return parameterList;
}
/**
* Gets the value of the logicalDeviceList property.
*
* @return
* possible object is
* {@link Jetstream.GetPoliciesResponse.PolicyList.Policy.LogicalDeviceList }
*
*/
public LogicalDeviceList getLogicalDeviceList() {
return logicalDeviceList;
}
/**
* Gets the value of the id property.
*
* @return
* possible object is
* {@link String }
*
*/
public String getId() {
return id;
}
/**
* Gets the value of the name property.
*
* @return
* possible object is
* {@link String }
*
*/
public String getName() {
return name;
}
/**
* Gets the value of the deviceDefinitionId property.
*
* @return
* possible object is
* {@link String }
*
*/
public String getDeviceDefinitionId() {
return deviceDefinitionId;
}
}
}
}
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "Header")
public static class Header {
@XmlAnyAttribute
private Map<QName, String> otherAttributes = new HashMap<QName, String>();
}
}
这是更新的逻辑设备
package com.TersoSolutions.Jetstream.SDK.XML;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAnyAttribute;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;
import javax.xml.namespace.QName;
import com.TersoSolutions.Jetstream.SDK.XML.Model.GetConfigurationResponse.Jetstream;
@XmlAccessorType(XmlAccessType.FIELD)
@XmlRootElement(name = "LogicalDeviceList")
public class LogicalDeviceList {
@XmlElement(name = "LogicalDevice")
protected List<LogicalDevice> logicalDevice;
/**
* Gets the value of the logicalDevice property.
*
* <p>
* This accessor method returns a reference to the live list,
* not a snapshot. Therefore any modification you make to the
* returned list will be present inside the JAXB object.
* This is why there is not a <CODE>set</CODE> method for the logicalDevice property.
*
* <p>
* For example, to add a new item, do as follows:
* <pre>
* getLogicalDevice().add(newItem);
* </pre>
*
*
* <p>
* Objects of the following type(s) are allowed in the list
* {@link Jetstream.GetConfigurationResponse.LogicalDeviceList.LogicalDevice }
*
*
*/
public List<LogicalDevice> getLogicalDevice() {
if (logicalDevice == null) {
logicalDevice = new ArrayList<LogicalDevice>();
}
return this.logicalDevice;
}
@XmlAccessorType(XmlAccessType.FIELD)
@XmlRootElement(name = "LogicalDevice")
public static class LogicalDevice {
@XmlElement(name = "ParameterList")
protected com.TersoSolutions.Jetstream.SDK.XML.ParameterList parameterList;
@XmlAttribute(name = "DeviceDefinitionId")
protected String deviceDefinitionId;
@XmlAttribute(name = "DeviceSerialNumber")
protected String deviceSerialNumber;
@XmlAttribute(name = "Health")
protected String health;
@XmlAttribute(name = "LogicalDeviceId", required = true)
protected String logicalDeviceId;
@XmlAttribute(name = "Region")
protected String region;
@XmlAttribute(name = "PolicyId")
protected String policyId;
@XmlAnyAttribute
private Map<QName, String> otherAttributes = new HashMap<QName, String>();
/**
* Gets the value of the deviceDefinitionId property.
*
* @return
* possible object is
* {@link String }
*
*/
public String getDeviceDefinitionId() {
return deviceDefinitionId;
}
/**
* Gets the value of the deviceSerialNumber property.
*
* @return
* possible object is
* {@link String }
*
*/
public String getDeviceSerialNumber() {
return deviceSerialNumber;
}
/**
* Gets the value of the health property.
*
* @return
* possible object is
* {@link String }
*
*/
public String getHealth() {
return health;
}
/**
* Gets the value of the logicalDeviceId property.
*
* @return
* possible object is
* {@link String }
*
*/
public String getLogicalDeviceId() {
return logicalDeviceId;
}
/**
* Gets the value of the region property.
*
* @return
* possible object is
* {@link String }
*
*/
public String getRegion() {
return region;
}
/**
* Gets the value of the policyId property.
*
* @return
* possible object is
* {@link String }
*
*/
public String getPolicyId() {
return policyId;
}
/**
* Gets the value of the parameterList property.
*
* @return
* possible object is
* {@link Jetstream.GetPoliciesResponse.PolicyList.Policy.LogicalDeviceList.LogicalDevice.ParameterList }
*
*/
public com.TersoSolutions.Jetstream.SDK.XML.ParameterList getParameterList() {
return parameterList;
}
}
}
最后是 Parameter 类
@XmlAccessorType(XmlAccessType.FIELD)
@XmlRootElement(name = "ParameterList")
public class ParameterList {
@XmlElement(name = "Parameter", required = true)
protected List<com.TersoSolutions.Jetstream.SDK.XML.Parameter> parameter;
@XmlAnyAttribute
private Map<QName, String> otherAttributes = new HashMap<QName, String>();
/**
* Gets the value of the parameter property.
*
* <p>
* This accessor method returns a reference to the live list,
* not a snapshot. Therefore any modification you make to the
* returned list will be present inside the JAXB object.
* This is why there is not a <CODE>set</CODE> method for the parameter property.
*
* <p>
* For example, to add a new item, do as follows:
* <pre>
* getParameter().add(newItem);
* </pre>
*
*
* <p>
* Objects of the following type(s) are allowed in the list
* {@link Jetstream.LogEntryEvent.LogEntryList.LogEntry.ParameterList.Parameter }
*
*
*/
public List<com.TersoSolutions.Jetstream.SDK.XML.Parameter> getParameter() {
if (parameter == null) {
parameter = new ArrayList<com.TersoSolutions.Jetstream.SDK.XML.Parameter>();
}
return this.parameter;
}
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "Parameter")
public static class Parameter {
@XmlAttribute(name = "Name", required = true)
protected String name;
@XmlAttribute(name = "Value", required = true)
protected String value;
@XmlAnyAttribute
private Map<QName, String> otherAttributes = new HashMap<QName, String>();
/**
* Gets the value of the name property.
*
* @return
* possible object is
* {@link String }
*
*/
public String getName() {
return name;
}
/**
* Gets the value of the value property.
*
* @return
* possible object is
* {@link String }
*
*/
public String getValue() {
return value;
}
}
}
重申正在发生的事情。Policy 静态类中包含的 Parameter 数据按预期存在，但 LogicalDevice 下的 Parameter 数据仅包含键，所有值数据都设置为 null。
有谁知道为什么我会因这些更改而丢失数据，或者是什么使静态类变得必要。