java.io.NotSerializableException错误

运行我的应用程序后，我遇到了不可序列化的异常错误。java.io.NotSerializableException错误

错误堆栈显示以下内容：

SEVERE: IOException while loading persisted sessions: java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: br.dao.DriverManagerDAOFactory 
java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: br.dao.DriverManagerDAOFactory 
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350) 
    at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1963) 
    at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1887) 
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1770) 
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1346) 
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:368) 
    at org.apache.catalina.session.StandardSession.readObject(StandardSession.java:1496) 
    at org.apache.catalina.session.StandardSession.readObjectData(StandardSession.java:998) 
    at org.apache.catalina.session.StandardManager.doLoad(StandardManager.java:394) 
    at org.apache.catalina.session.StandardManager.load(StandardManager.java:321) 
    at org.apache.catalina.session.StandardManager.start(StandardManager.java:648) 
    at org.apache.catalina.core.ContainerBase.setManager(ContainerBase.java:446) 
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4631) 
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799) 
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779) 
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:601) 
    at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:675) 
    at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:601) 
    at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:502) 
    at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1317) 
    at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:324) 
    at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142) 
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1065) 
    at org.apache.catalina.core.StandardHost.start(StandardHost.java:840) 
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057) 
    at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463) 
    at org.apache.catalina.core.StandardService.start(StandardService.java:525) 
    at org.apache.catalina.core.StandardServer.start(StandardServer.java:754) 
    at org.apache.catalina.startup.Catalina.start(Catalina.java:595) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:616) 
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) 
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414) 
Caused by: java.io.NotSerializableException: br.dao.DriverManagerDAOFactory 
    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1180) 
    at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1528) 
    at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1493) 
    at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1416) 
    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174) 
    at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:346) 
    at org.apache.catalina.session.StandardSession.writeObject(StandardSession.java:1572) 
    at org.apache.catalina.session.StandardSession.writeObjectData(StandardSession.java:1015)

所以我做了以下希望能纠正问题：

class DriverManagerDAOFactory extends DAOFactory implements Serializable{ 
    private String url; 
    private String username; 
    private String password; 

    DriverManagerDAOFactory(String url, String username, String password) { 
     this.url = url; 
     this.username = username; 
     this.password = password; 
    } 

    Connection getConnection() throws SQLException { 
     return DriverManager.getConnection(url, username, password); 
    } 
}

即使这样，我实现了序列化后，错误仍然出现。 ..什么线索关于这？：/

来源

2011-11-23 ShaunK

有没有原因，你没有'serialVersionUID'？你的编译器应该警告你。 – Kane

你的超级DAOFactory是可序列化的吗？您的更改是否也正确地在课程路径中找到？软件可能使用较早的jar/classes运行。

来源

2011-11-23 16:10:17

哦哇，谢谢...我的daofactory是不可序列化.. doh ..谢谢！现在没事了！ – ShaunK

连接不应该也不能被序列化。出于类似的原因，您的DAOFactory不可序列化。我想这个问题是因为你的工厂对象被引用/存储在你的会话中，因此当你的会话被序列化时，你的DAOFactory也会被序列化，导致异常。你应该仔细看看为什么你的会话应该包含你的工厂对象。

来源

2011-11-23 16:21:24 Drona

Humm okay哇，我拿出序列号为我的daofactory和DriverManagerDAOFactory，并且我再次运行我的应用程序，没有错误...这太奇怪了.. – ShaunK

java.io.NotSerializableException错误

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