我的代码抛出java.io.NotSerializableException。为什么?谢谢!
private void test3() {
Element3 element3=new Element3();
ObjectToBytes3(element3);
}
private class Element3 implements Serializable{
int code=0;
}
//-----------------------------------
private void ObjectToBytes3(Element3 elem){
ByteArrayOutputStream bos = new ByteArrayOutputStream();
ObjectOutputStream out = null;
try {
out = new ObjectOutputStream(bos);
out.writeObject(elem);
byte[] myBytes = bos.toByteArray();
}
catch (Exception e) {myPrint("exception",e.toString());}
finally {
try{
out.flush();
out.close();
bos.close();
}
catch (Exception e) {}
}
}
输出和堆栈如下: 2674,25 ObjToBytes: 2674,32异常:java.io.NotSerializableException:java.util.concurrent.ThreadPoolExecutor stack = java.io.NotSerializableException:java.util.concurrent.ThreadPoolExecutor at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1164) at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518) at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483) at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158) at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518) at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483) at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158) 在java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
这很有趣,但下面的代码可以正常使用
================================
class My implements Serializable{
byte a=1;
int b=88;
String s="ggg";
private My(byte a1, int b1,String s1) {
a=a1;
b=b1;
s=s1;
}
}
private void test() {
My my=new My((byte)5,10,"jjj");
ObjectToBytesTest(my);
}
//-----------------------------------
private void ObjectToBytesTest(My my){
ByteArrayOutputStream bos = new ByteArrayOutputStream();
ObjectOutputStream out = null;
try {
out = new ObjectOutputStream(bos);
out.writeObject(element);
byte[] myBytes = bos.toByteArray();
}
catch (Exception e) {print("exception",e.toString());}
finally {
try{
out.flush();
out.close();
bos.close();
}
catch (Exception e) {}
}
}
答案 0 :(得分:2)
因为Element3实例elem具有对outter对象的隐式引用。
序列化Element3时使用Serializable接口的默认动作,它将序列化outter对象,而outter对象没有实现Serializable接口,因此会抛出java.io.NotSerializableException。
异常将引用未实现Serializable接口的outter对象类。
在我的代码中,它是:java.io.NotSerializableException: serializable.ObjectToBytesTest
要解决这个问题,你应该将Element3类移出outter类,如下所示:
public class ObjectToBytesTest {
private void ObjectToBytes3() { ... }
}
class Element3 implements Serializable {
int code=0;
}
或者就像您的解决方案(我的类实现Serializable接口),但我认为不建议使用此解决方案。