cxf 结合 spring 发布web service时 不能实例化User对象的问题

问题描述

在service层中调用了Dao方法来进行数据库的操作 然后又重新了UserWebservice接口及其实现类 在实现类中直接调用service的方法domain中User类public abstract class User {private String userName;private String userPassword;private String mobile;private String email;private String nickname;private String region;private java.util.Date birthday ;private String telephone;private String address;private String postcode;private String signature;private String imageUrl;private int userID;private Set<Right> rightSet = new HashSet<Right>();//getter 和setter略@Overridepublic String toString() {return "User [userName=" + userName + ", userPassword=" + userPassword+ ", mobile=" + mobile + ", email=" + email + ", nickname="+ nickname + ", region=" + region + ", birthday=" + birthday+ ", telephone=" + telephone + ", address=" + address+ ", postcode=" + postcode + ", signature=" + signature+ ", imageUrl=" + imageUrl + ", userID=" + userID+ ", rightSet=" + rightSet.size() + "]";}}public class Member extends User {@Overridepublic boolean getIsAdmin() {// TODO Auto-generated method stubreturn false;}}public class Admin extends User {@Overridepublic boolean getIsAdmin() {// TODO Auto-generated method stubreturn true;}}Right类public class Right {private int rightID;private String name;private Set<User> userSet = new HashSet<User>();public String getName() {return name;}public void setName(String name) {this.name = name;}public int getRightID() {return rightID;}public void setRightID(int rightID) {this.rightID = rightID;}public Set<User> getUserSet() {return userSet;}public void setUserSet(Set<User> userSet) {this.userSet = userSet;}@Overridepublic String toString() {return "Right [rightID=" + rightID + ", name=" + name + ", userSet="+ userSet.size() + "]";}}发布成web service后 写了一个public class ClientTest {public static void main(String[] args) throws Exception { JaxWsProxyFactoryBean factory = new JaxWsProxyFactoryBean(); factory.setServiceClass(UserWebservice.class); factory.setAddress("http://localhost:8080/TwoTablesSSH/services/UserWebService"); UserWebservice webservice = (UserWebservice) factory.create(); ]User user = webservice.queryByID(1); System.out.println(user);}}结果出错了Exception in thread "main" org.apache.cxf.binding.soap.SoapFault: Marshalling Error: A cycle is detected in the object graph. This will cause infinitely deep XML: User [userName=admin, userPassword=admin, mobile=admin, email=admin, nickname=admin, region=null, birthday=2011-11-25 17:16:37.0, telephone=null, address=null, postcode=null, signature=null, imageUrl=null, userID=1, rightSet=4] -> Right [rightID=1, name=UpdateRight, userSet=1] -> User [userName=admin, userPassword=admin, mobile=admin, email=admin, nickname=admin, region=null, birthday=2011-11-25 17:16:37.0, telephone=null, address=null, postcode=null, signature=null, imageUrl=null, userID=1, rightSet=4]at org.apache.cxf.jaxws.JaxWsClientProxy.invoke(JaxWsClientProxy.java:141)at $Proxy30.queryByID(Unknown Source)at com.tianxiao.whut.client.ClientTest.main(ClientTest.java:22)出现了循环引用对象的问题，看网上的解决办法，将@XmlTransient放在了Right类中的@XmlTransientpublic Set<User> getUserSet() {return userSet;}结果 出现了无法实例化User的问题org.apache.cxf.interceptor.Fault: Unmarshalling Error: Unable to create an instance of com.tianxiao.whut.domain.User at org.apache.cxf.jaxb.JAXBEncoderDecoder.unmarshall(JAXBEncoderDecoder.java:801)at org.apache.cxf.jaxb.JAXBEncoderDecoder.unmarshall(JAXBEncoderDecoder.java:642)at org.apache.cxf.jaxb.io.DataReaderImpl.read(DataReaderImpl.java:156)at org.apache.cxf.interceptor.DocLiteralInInterceptor.handleMessage(DocLiteralInInterceptor.java:109)at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:263)at org.apache.cxf.endpoint.ClientImpl.onMessage(ClientImpl.java:797)at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.handleResponseInternal(HTTPConduit.java:1626)at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.handleResponse(HTTPConduit.java:1493)at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.close(HTTPConduit.java:1401)at org.apache.cxf.transport.AbstractConduit.close(AbstractConduit.java:56)at org.apache.cxf.transport.http.HTTPConduit.close(HTTPConduit.java:648)at org.apache.cxf.interceptor.MessageSenderInterceptor$MessageSenderEndingInterceptor.handleMessage(MessageSenderInterceptor.java:62)at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:263)at org.apache.cxf.endpoint.ClientImpl.doInvoke(ClientImpl.java:533)at org.apache.cxf.endpoint.ClientImpl.invoke(ClientImpl.java:463)at org.apache.cxf.endpoint.ClientImpl.invoke(ClientImpl.java:366)at org.apache.cxf.endpoint.ClientImpl.invoke(ClientImpl.java:319)at org.apache.cxf.frontend.ClientProxy.invokeSync(ClientProxy.java:88)at org.apache.cxf.jaxws.JaxWsClientProxy.invoke(JaxWsClientProxy.java:134)at $Proxy31.queryByID(Unknown Source)at com.tianxiao.whut.client.ClientTest.main(ClientTest.java:22)Caused by: javax.xml.bind.UnmarshalException - with linked exception:[javax.xml.bind.UnmarshalException: Unable to create an instance of com.tianxiao.whut.domain.User - with linked exception:[java.lang.InstantiationException]]at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.handleStreamException(UnmarshallerImpl.java:434)at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:371)at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:348)at org.apache.cxf.jaxb.JAXBEncoderDecoder.unmarshall(JAXBEncoderDecoder.java:778)... 20 moreCaused by: javax.xml.bind.UnmarshalException: Unable to create an instance of com.tianxiao.whut.domain.User - with linked exception:[java.lang.InstantiationException]at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.handleEvent(UnmarshallingContext.java:662)at com.sun.xml.bind.v2.runtime.unmarshaller.Loader.reportError(Loader.java:258)at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.createInstance(UnmarshallingContext.java:629)at com.sun.xml.bind.v2.runtime.unmarshaller.StructureLoader.startElement(StructureLoader.java:185)at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext._startElement(UnmarshallingContext.java:501)at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.startElement(UnmarshallingContext.java:480)at com.sun.xml.bind.v2.runtime.unmarshaller.StAXStreamConnector.handleStartElement(StAXStreamConnector.java:247)at com.sun.xml.bind.v2.runtime.unmarshaller.StAXStreamConnector.bridge(StAXStreamConnector.java:181)at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:369)... 22 moreCaused by: javax.xml.bind.UnmarshalException: Unable to create an instance of com.tianxiao.whut.domain.User - with linked exception:[java.lang.InstantiationException]... 31 moreCaused by: java.lang.InstantiationExceptionat sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(Unknown Source)at java.lang.reflect.Constructor.newInstance(Unknown Source)at com.sun.xml.bind.v2.ClassFactory.create0(ClassFactory.java:122)at com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.createInstance(ClassBeanInfoImpl.java:282)at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.createInstance(UnmarshallingContext.java:623)... 28 moreException in thread "main" org.apache.cxf.interceptor.Fault: Unmarshalling Error: Unable to create an instance of com.tianxiao.whut.domain.User at org.apache.cxf.jaxws.JaxWsClientProxy.invoke(JaxWsClientProxy.java:141)at $Proxy31.queryByID(Unknown Source)at com.tianxiao.whut.client.ClientTest.main(ClientTest.java:22)Caused by: javax.xml.bind.UnmarshalException - with linked exception:[javax.xml.bind.UnmarshalException: Unable to create an instance of com.tianxiao.whut.domain.User - with linked exception:[java.lang.InstantiationException]]at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.handleStreamException(UnmarshallerImpl.java:434)at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:371)at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:348)at org.apache.cxf.jaxb.JAXBEncoderDecoder.unmarshall(JAXBEncoderDecoder.java:778)at org.apache.cxf.jaxb.JAXBEncoderDecoder.unmarshall(JAXBEncoderDecoder.java:642)at org.apache.cxf.jaxb.io.DataReaderImpl.read(DataReaderImpl.java:156)at org.apache.cxf.interceptor.DocLiteralInInterceptor.handleMessage(DocLiteralInInterceptor.java:109)at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:263)at org.apache.cxf.endpoint.ClientImpl.onMessage(ClientImpl.java:797)at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.handleResponseInternal(HTTPConduit.java:1626)at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.handleResponse(HTTPConduit.java:1493)at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.close(HTTPConduit.java:1401)at org.apache.cxf.transport.AbstractConduit.close(AbstractConduit.java:56)at org.apache.cxf.transport.http.HTTPConduit.close(HTTPConduit.java:648)at org.apache.cxf.interceptor.MessageSenderInterceptor$MessageSenderEndingInterceptor.handleMessage(MessageSenderInterceptor.java:62)at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:263)at org.apache.cxf.endpoint.ClientImpl.doInvoke(ClientImpl.java:533)at org.apache.cxf.endpoint.ClientImpl.invoke(ClientImpl.java:463)at org.apache.cxf.endpoint.ClientImpl.invoke(ClientImpl.java:366)at org.apache.cxf.endpoint.ClientImpl.invoke(ClientImpl.java:319)at org.apache.cxf.frontend.ClientProxy.invokeSync(ClientProxy.java:88)at org.apache.cxf.jaxws.JaxWsClientProxy.invoke(JaxWsClientProxy.java:134)... 2 moreCaused by: javax.xml.bind.UnmarshalException: Unable to create an instance of com.tianxiao.whut.domain.User - with linked exception:[java.lang.InstantiationException]at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.handleEvent(UnmarshallingContext.java:662)at com.sun.xml.bind.v2.runtime.unmarshaller.Loader.reportError(Loader.java:258)at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.createInstance(UnmarshallingContext.java:629)at com.sun.xml.bind.v2.runtime.unmarshaller.StructureLoader.startElement(StructureLoader.java:185)at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext._startElement(UnmarshallingContext.java:501)at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.startElement(UnmarshallingContext.java:480)at com.sun.xml.bind.v2.runtime.unmarshaller.StAXStreamConnector.handleStartElement(StAXStreamConnector.java:247)at com.sun.xml.bind.v2.runtime.unmarshaller.StAXStreamConnector.bridge(StAXStreamConnector.java:181)at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:369)... 22 moreCaused by: javax.xml.bind.UnmarshalException: Unable to create an instance of com.tianxiao.whut.domain.User - with linked exception:[java.lang.InstantiationException]... 31 moreCaused by: java.lang.InstantiationExceptionat sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(Unknown Source)at java.lang.reflect.Constructor.newInstance(Unknown Source)at com.sun.xml.bind.v2.ClassFactory.create0(ClassFactory.java:122)at com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.createInstance(ClassBeanInfoImpl.java:282)at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.createInstance(UnmarshallingContext.java:623)... 28 more请教各位大虾，这是怎么回事 ，好像变糟糕了 ！！！

解决方案

jaxb提供了有这种扩展。（CycleRecoverable接口） 解决循环引用问题，你试试：public abstract class User implements CycleRecoverable{//... public Object onCycleDetected(Context arg0) {　　Company temp = new Company ();　　temp.setId(id);　　return temp;　　}}public class Right { }
解决方案二：
在你循环引用的对象中都实现CycleRecoverable 接口，实现onCycleDetected 方法，当出现循环引用时，使用一个temp对象替换当前的this

时间： 2024-10-26 07:25:28

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