[英]Unknown exception while deserializing using simple XML
I am deserializing data using Simple XML in Java, but i get an exception telling me: 我正在使用Java中的简单XML反序列化数据,但出现一个异常告诉我:
protokolsimulering.model.Terminal.<init>()
This is my serializing code: 这是我的序列化代码:
public void saveSimulationState(String simulationFile) {
try{
Strategy strategy = new CycleStrategy("id", "ref");
Serializer serializer = new Persister(strategy);
File result = new File(simulationFile);
serializer.write(this.sm, result);
}
catch(Exception ex)
{
System.out.println(ex.getMessage());
}
}
public void loadSimulationState(String simulationFile) {
try {
Strategy strategy = new CycleStrategy("id", "ref");
Serializer serializer = new Persister(strategy);
File source = new File(simulationFile);
this.sm = serializer.read(Simulation.class, source);
} catch (Exception ex) {
System.out.println(ex.getLocalizedMessage());
}
}
The code for Terminal.java is: Terminal.java的代码是:
package protokolsimulering.model;
import java.util.ArrayList;
import protokolsimulering.model.DataPacket.*;
public class Terminal extends Sensor {
public Terminal(int x, int y, double r) {
super(x,y,r);
learnPosition();
}
@Override
public void init() {
this.broadcast(PacketFactory.newRutePacket(this,0));
}
@Override
public void step() {
ArrayList<AbstractPacket> packetsThisStep = (ArrayList<AbstractPacket>) this.getPackages();
for(AbstractPacket p : packetsThisStep) {
if(p instanceof HalloPacket) {
// Rutningsprotokol
send(p.getSender(),PacketFactory.newRutePacket(this,0));
// Lokaliseringsprotokol
send(p.getSender(), PacketFactory.newHerPacket(this, this.getKnownPosition()));
}
}
}
} }
The entire source code can be found at: 完整的源代码可以在以下位置找到:
http://code.google.com/p/sensor-protocol-simulation/source/browse/#svn/trunk/src/protokolsimulering http://code.google.com/p/sensor-protocol-simulation/source/browse/#svn/trunk/src/protokolsimulering
The exception means the problem is related to invoking the Terminal constructor. 该异常表示问题与调用Terminal构造函数有关。
Typically, to construct objects when deserializing, a no-args contructor must be available, like this: 通常,要在反序列化时构造对象,必须有一个无参数构造器,如下所示:
public Terminal() {
...
}
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