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我想这将是一个非常基本的问题，但我一直在寻找答案几个小时，但我无法弄清楚我的代码哪里出错了。所以：我确实序列化了一个名为 SerializableObject 的对象，而不是读回它。在反序列化方法中，我得到一个临时对象，我想将其复制到另一个 new SerializeableObject，之后我想使用它，但我无法正确复制它，但是临时对象在反序列化时正确获取了值。这是我的课程： SeralizeableObject：

public class SerializableObject implements Serializable, Cloneable{

private Vector<int[]> mixMade;
private Vector<int[]> stepsMade;
private long time;
private int steps;
private int winnerState;

public SerializableObject(Vector<int[]> mixMade, Vector<int[]> stepsMade,
 long time, int steps, int winnerState) {
    this.mixMade = mixMade;
    this.stepsMade = stepsMade;
    this.time = time;
    this.steps = steps;
    this.winnerState = winnerState;
}

@Override
public String toString() {
    String str = "";
    for(int[] mixEl : mixMade){
        str += mixEl[0] + ", " + mixEl[1] + "|";
    }
    str += " mixes\n";
    for(int[] stepEl : stepsMade){
        str += stepEl[0] + ", " + stepEl[1] + "|";
    }
    str += " steps\n";
    str += "time: " + time + ", stepsnum: " + steps + ", 
winstate: " + winnerState;
    return str;
}    

@Override
public SerializableObject clone() {
    SerializableObject serObj;
    Vector<int[]> mixMadeTemp   = new Vector<int[]>();
    Vector<int[]> stepsMadeTemp   = new Vector<int[]>();
    for(int i = 0; i < mixMade.size(); ++i){
        mixMadeTemp.add(mixMade.get(i));
    }
    for(int i = 0; i < stepsMade.size(); ++i){
        stepsMadeTemp.add(stepsMade.get(i));
    }
    serObj = new SerializableObject(mixMadeTemp, stepsMadeTemp, 
time, steps, winnerstate);
    return serObj;
}

}

序列化器：

public class ObjectSerializator {

public ObjectSerializator() {

}

public void toFile(String filepath, SerializableObject serObj){
    ObjectOutputStream out;
    try{
        FileOutputStream fileOut = new FileOutputStream(filepath);
        out = new ObjectOutputStream(fileOut);
        out.writeObject(serObj);
    }catch (IOException ex) {

    }    
}

public void fromFile(String filepath, SerializableObject serObj){
    SerializableObject tempSerObj;
    try {
        FileInputStream fileIn = new FileInputStream(filepath);
        ObjectInputStream in = new ObjectInputStream(fileIn);

        tempSerObj = (SerializableObject) in.readObject();
        System.out.println(tempSerObj + "TEMP");
        serObj = tempSerObj.clone();

        in.close();
        fileIn.close();
    } catch (IOException ex) {

    } catch (ClassNotFoundException ex) {

    }
}

}

注意： serobj 引用正确地指向了良好的值，在 fromFile 方法 A filechooser 类中，用户可以从中选择要加载的文件：

public class FileChooser extends JFileChooser{

private ObjectSerializator serializator;

public FileChooser() {
    serializator = new ObjectSerializator();
}

public void load(SerializableObject serObj){
        int retValue = showOpenDialog(null);
        serializator.fromFile(getSelectedFile().getAbsolutePath(), serObj);
}}

比在我的大型机中，我从按钮操作中调用它

public void load(){
    SerializableObject serObj = new SerializableObject(new Vector<int[]>(), new 
Vector<int[]>(), 10, 10, 200);
    fileChooser.load(serObj);
    System.out.println(serObj + " LAST");
}

这是我的输出：

3, 2|4, 3| mixes

0, 0|0, 1|0, 0| steps

time: 6000, stepsnum: 3, winstate: 0TEMP

-------------------

 mixes

 steps

time: 10, stepsnum: 10, winstate: 200 LAST
4

1 回答 1

1

您反序列化的对象会丢失。

在您的fromFile方法中，您有以下行：

serObj = tempSerObj.clone();

但是serObj是该方法的一个论据。上面的行更改了局部 serObj变量，而原始对象保持不变。调用方法 ( load) 仍然持有对旧（原始）对象的引用。

您的fromFile方法不应接受 aSerializableObject作为参数；相反，它应该返回一个。然后该FileChooser.load方法也应该返回它。最后，load主框架的方法应该类似于：

public void load() {
    SerializableObject originalObject = new SerializableObject(new Vector<int[]>(), new Vector<int[]>(), 10, 10, 200);
    // Here you can do something with the newly created object, such as save it to a file.

    SerializableObject deserializedObject = fileChooser.load();
    System.out.println(deserializedObject + " LAST");
}
于 2012-04-10T11:52:40.237 回答