我正在尝试获取包含来自java服务器的对象的序列化ArrayList，但是当我在android应用程序中进行反序列化时会发生错误。
所以我有：
投票类
package entities;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
public class Vote implements Serializable {
private static final long serialVersionUID = 2L;
private int voteId;
private int surveyId;
private int voterId;
private List<Choice> choices;
private boolean counted;
public Vote(){
}
public Vote(int voteId,int surveyId,int voterId, boolean counted){
this.voteId=voteId;
this.surveyId=surveyId;
this.voterId=voterId;
this.choices = new ArrayList<Choice>();
this.counted=counted;
}
public void addChoice(Choice choice) {
choices.add(choice);
}
public int getVoteId() {
return voteId;
}
public void setVoteId(int voteId) {
this.voteId = voteId;
}
public int getSurveyId() {
return surveyId;
}
public void setSurveyId(int surveyId) {
this.surveyId = surveyId;
}
public int getVoterId() {
return voterId;
}
public void setVoterId(int voterId) {
this.voterId = voterId;
}
public List<Choice> getChoices() {
return choices;
}
public void setChoices(List<Choice> choices) {
this.choices = choices;
}
public boolean isCounted() {
return counted;
}
public void setCounted(boolean counted) {
this.counted = counted;
}
}
AND此对象包含选项的arraylist
选择课程
package entities;
import java.io.Serializable;
import thep.paillier.EncryptedInteger;
public class Choice implements Serializable {
private static final long serialVersionUID = 2L;
private EncryptedInteger encryptedInteger;
private int questionNumber;
private int optionNumber;
private double S;
public Choice(EncryptedInteger encryptedInteger, int questionNumber,
int optionNumber, double s) {
this.encryptedInteger = encryptedInteger;
this.questionNumber = questionNumber;
this.optionNumber = optionNumber;
S = s;
}
public EncryptedInteger getEncryptedInteger() {
return encryptedInteger;
}
public void setEncryptedInteger(EncryptedInteger encryptedInteger) {
this.encryptedInteger = encryptedInteger;
}
public int getQuestionNumber() {
return questionNumber;
}
public void setQuestionNumber(int questionNumber) {
this.questionNumber = questionNumber;
}
public int getOptionNumber() {
return optionNumber;
}
public void setOptionNumber(int optionNumber) {
this.optionNumber = optionNumber;
}
public double getS() {
return S;
}
public void setS(double s) {
S = s;
}
}
将创建arraylist的代码
@Path("/vote")
public class GenerateNumberRequest {
@POST
@Path("/GNA")
@Consumes("application/x-www-form-urlencoded")
public Response GNApost(MultivaluedMap<String, String> form,
@Context HttpServletResponse httpResponse) {
int voteId = Integer.parseInt(form.getFirst("voteId"));
String generateNumberAuthenticator = form
.getFirst("generateNumberAuthenticator");
SurveyKey key = null;
VoteAuthenticator authenticator = null;
VoterVerifierRepository voterVerifierRepository = new VoterVerifierRepository();
VoteAuthenticatorRepository voteAuthenticatorRepository = new VoteAuthenticatorRepository();
SurveyKeyRepository surveyKeyRepository = new SurveyKeyRepository();
try {
authenticator = voteAuthenticatorRepository
.getVoteAuthenticator(voteId);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
int surveyId = authenticator.getSurveyId();
SurveyCommunication surveyCommunication = new SurveyCommunication(
surveyId);
Survey survey = surveyCommunication.getSurvey();
try {
key = surveyKeyRepository.getSurveyKey(surveyId);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
List<Vote> votes = new ArrayList<Vote>();
Vote voteZero = new Vote(authenticator.getVoteId(),
authenticator.getSurveyId(), authenticator.getVoterId(), false);
Vote voteOne = new Vote(authenticator.getVoteId(),
authenticator.getSurveyId(), authenticator.getVoterId(), false);
Random random = new Random();
double s1, s2, s3;
PublicKey publicKey = key.getPublicKey();
EncryptedInteger encryptedZero = null;
EncryptedInteger encryptedOne = null;
for (Question q : survey.getAllQuestions()) {
for (Option o : q.getOptions()) {
s1 = random.nextInt() % 10000;
s2 = -(s1 * key.getX()) / key.getY();
s3 = (1 - (s1 * key.getX())) / key.getY();
try {
encryptedZero = new EncryptedInteger(BigInteger.ZERO,
publicKey);
encryptedOne = new EncryptedInteger(BigInteger.ONE,
publicKey);
} catch (BigIntegerClassNotValid e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
voteZero.addChoice(new Choice(encryptedZero, q.getqID(), o
.getOptionNumaricalValue(), s2));
voteOne.addChoice(new Choice(encryptedOne, q.getqID(), o
.getOptionNumaricalValue(), s3));
}
}
votes.add(voteZero);
votes.add(voteOne);
ByteArrayOutputStream b = new ByteArrayOutputStream();
ObjectOutputStream o;
try {
o = new ObjectOutputStream(b);
o.writeObject(votes);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return Response.status(200).entity(b.toByteArray()).build();
}
}
安卓代码
package com.example.connection;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.EntityUtils;
import entities.Vote;
public class GenerateNumberConnection {
static HttpClient httpClient;
static HttpPost httpPost;
static HttpResponse response;
@SuppressWarnings("unchecked")
public static List<Vote> getVotes(String voteId, String GNA) {
httpClient = HttpObjects.getHttpClient();
httpPost = new HttpPost(
"http://192.168.100.4:8181/trustee/APP/vote/GNA");
List<Vote> votes = null;
ArrayList<NameValuePair> postParameters;
postParameters = new ArrayList<NameValuePair>();
postParameters.add(new BasicNameValuePair("voteId", voteId));
postParameters.add(new BasicNameValuePair(
"generateNumberAuthenticator", GNA));
try {
httpPost.setEntity(new UrlEncodedFormEntity(postParameters));
HttpResponse response = httpClient.execute(httpPost);
HttpEntity entity = response.getEntity();
byte[] responseByte = null;
responseByte = EntityUtils.toByteArray(entity);
ByteArrayInputStream in = new ByteArrayInputStream(responseByte);
ObjectInputStream is = new ObjectInputStream(in);
votes = (List<Vote>) is.readObject();
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return votes;
}
}
代码的痕迹
05-02 09:58:50.248: W/System.err(934): java.lang.ClassNotFoundException: sun.security.provider.Sun
05-02 09:58:50.248: W/System.err(934): at java.lang.Class.classForName(Native Method)
05-02 09:58:50.248: W/System.err(934): at java.lang.Class.forName(Class.java:251)
05-02 09:58:50.248: W/System.err(934): at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:2262)
05-02 09:58:50.268: W/System.err(934): at java.io.ObjectInputStream.readNewClassDesc(ObjectInputStream.java:1638)
05-02 09:58:50.268: W/System.err(934): at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:658)
05-02 09:58:50.268: W/System.err(934): at java.io.ObjectInputStream.readNewObject(ObjectInputStream.java:1781)
05-02 09:58:50.268: W/System.err(934): at java.io.ObjectInputStream.readNonPrimitiveContent(ObjectInputStream.java:762)
05-02 09:58:50.268: W/System.err(934): at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1981)
05-02 09:58:50.268: W/System.err(934): at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1938)
05-02 09:58:50.268: W/System.err(934): at java.io.ObjectInputStream.readFieldValues(ObjectInputStream.java:1115)
05-02 09:58:50.268: W/System.err(934): at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:455)
05-02 09:58:50.268: W/System.err(934): at java.io.ObjectInputStream.readObjectForClass(ObjectInputStream.java:1347)
05-02 09:58:50.268: W/System.err(934): at java.io.ObjectInputStream.readHierarchy(ObjectInputStream.java:1244)
05-02 09:58:50.268: W/System.err(934): at java.io.ObjectInputStream.readNewObject(ObjectInputStream.java:1833)
05-02 09:58:50.268: W/System.err(934): at java.io.ObjectInputStream.readNonPrimitiveContent(ObjectInputStream.java:762)
05-02 09:58:50.268: W/System.err(934): at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1981)
05-02 09:58:50.268: W/System.err(934): at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1938)
05-02 09:58:50.268: W/System.err(934): at java.io.ObjectInputStream.readFieldValues(ObjectInputStream.java:1115)
05-02 09:58:50.268: W/System.err(934): at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:455)
05-02 09:58:50.268: W/System.err(934): at java.io.ObjectInputStream.readObjectForClass(ObjectInputStream.java:1347)
05-02 09:58:50.268: W/System.err(934): at java.io.ObjectInputStream.readHierarchy(ObjectInputStream.java:1244)
05-02 09:58:50.278: W/System.err(934): at java.io.ObjectInputStream.readNewObject(ObjectInputStream.java:1833)
05-02 09:58:50.278: W/System.err(934): at java.io.ObjectInputStream.readNonPrimitiveContent(ObjectInputStream.java:762)
05-02 09:58:50.278: W/System.err(934): at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1981)
05-02 09:58:50.278: W/System.err(934): at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1938)
05-02 09:58:50.278: W/System.err(934): at java.io.ObjectInputStream.readFieldValues(ObjectInputStream.java:1115)
05-02 09:58:50.288: W/System.err(934): at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:455)
05-02 09:58:50.288: W/System.err(934): at java.io.ObjectInputStream.readObjectForClass(ObjectInputStream.java:1347)
05-02 09:58:50.288: W/System.err(934): at java.io.ObjectInputStream.readHierarchy(ObjectInputStream.java:1244)
05-02 09:58:50.298: W/System.err(934): at java.io.ObjectInputStream.readNewObject(ObjectInputStream.java:1833)
05-02 09:58:50.298: W/System.err(934): at java.io.ObjectInputStream.readNonPrimitiveContent(ObjectInputStream.java:762)
05-02 09:58:50.298: W/System.err(934): at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1981)
05-02 09:58:50.298: W/System.err(934): at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1938)
05-02 09:58:50.298: W/System.err(934): at java.util.ArrayList.readObject(ArrayList.java:661)
05-02 09:58:50.298: W/System.err(934): at java.lang.reflect.Method.invokeNative(Native Method)
05-02 09:58:50.298: W/System.err(934): at java.lang.reflect.Method.invoke(Method.java:515)
05-02 09:58:50.298: W/System.err(934): at java.io.ObjectInputStream.readObjectForClass(ObjectInputStream.java:1332)
05-02 09:58:50.298: W/System.err(934): at java.io.ObjectInputStream.readHierarchy(ObjectInputStream.java:1244)
05-02 09:58:50.298: W/System.err(934): at java.io.ObjectInputStream.readNewObject(ObjectInputStream.java:1833)
05-02 09:58:50.308: W/System.err(934): at java.io.ObjectInputStream.readNonPrimitiveContent(ObjectInputStream.java:762)
05-02 09:58:50.308: W/System.err(934): at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1981)
05-02 09:58:50.318: W/System.err(934): at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1938)
05-02 09:58:50.318: W/System.err(934): at java.io.ObjectInputStream.readFieldValues(ObjectInputStream.java:1115)
05-02 09:58:50.318: W/System.err(934): at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:455)
05-02 09:58:50.318: W/System.err(934): at java.io.ObjectInputStream.readObjectForClass(ObjectInputStream.java:1347)
05-02 09:58:50.318: W/System.err(934): at java.io.ObjectInputStream.readHierarchy(ObjectInputStream.java:1244)
05-02 09:58:50.328: W/System.err(934): at java.io.ObjectInputStream.readNewObject(ObjectInputStream.java:1833)
05-02 09:58:50.328: W/System.err(934): at java.io.ObjectInputStream.readNonPrimitiveContent(ObjectInputStream.java:762)
05-02 09:58:50.348: W/System.err(934): at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1981)
05-02 09:58:50.348: W/System.err(934): at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1938)
05-02 09:58:50.348: W/System.err(934): at java.util.ArrayList.readObject(ArrayList.java:661)
05-02 09:58:50.348: W/System.err(934): at java.lang.reflect.Method.invokeNative(Native Method)
05-02 09:58:50.348: W/System.err(934): at java.lang.reflect.Method.invoke(Method.java:515)
05-02 09:58:50.348: W/System.err(934): at java.io.ObjectInputStream.readObjectForClass(ObjectInputStream.java:1332)
05-02 09:58:50.348: W/System.err(934): at java.io.ObjectInputStream.readHierarchy(ObjectInputStream.java:1244)
05-02 09:58:50.358: W/System.err(934): at java.io.ObjectInputStream.readNewObject(ObjectInputStream.java:1833)
05-02 09:58:50.358: W/System.err(934): at java.io.ObjectInputStream.readNonPrimitiveContent(ObjectInputStream.java:762)
05-02 09:58:50.358: W/System.err(934): at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1981)
05-02 09:58:50.358: W/System.err(934): at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1938)
05-02 09:58:50.358: W/System.err(934): at com.example.connection.GenerateNumberConnection.getVotes(GenerateNumberConnection.java:57)
05-02 09:58:50.358: W/System.err(934): at com.example.elections.PagesValue.readWebServices(PagesValue.java:396)
05-02 09:58:50.358: W/System.err(934): at com.example.elections.PagesValue$8.onClick(PagesValue.java:265)
05-02 09:58:50.358: W/System.err(934): at android.view.View.performClick(View.java:4438)
05-02 09:58:50.358: W/System.err(934): at android.view.View$PerformClick.run(View.java:18422)
05-02 09:58:50.358: W/System.err(934): at android.os.Handler.handleCallback(Handler.java:733)
05-02 09:58:50.358: W/System.err(934): at android.os.Handler.dispatchMessage(Handler.java:95)
05-02 09:58:50.358: W/System.err(934): at android.os.Looper.loop(Looper.java:136)
05-02 09:58:50.358: W/System.err(934): at android.app.ActivityThread.main(ActivityThread.java:5017)
05-02 09:58:50.358: W/System.err(934): at java.lang.reflect.Method.invokeNative(Native Method)
05-02 09:58:50.358: W/System.err(934): at java.lang.reflect.Method.invoke(Method.java:515)
05-02 09:58:50.358: W/System.err(934): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
05-02 09:58:50.358: W/System.err(934): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
05-02 09:58:50.368: W/System.err(934): at dalvik.system.NativeStart.main(Native Method)
05-02 09:58:50.368: W/System.err(934): Caused by: java.lang.NoClassDefFoundError: sun/security/provider/Sun
05-02 09:58:50.368: W/System.err(934): ... 73 more
05-02 09:58:50.368: W/System.err(934): Caused by: java.lang.ClassNotFoundException: Didn't find class "sun.security.provider.Sun" on path: DexPathList[[zip file "/data/app/com.example.elections-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.example.elections-1, /system/lib]]
05-02 09:58:50.388: W/System.err(934): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
05-02 09:58:50.388: W/System.err(934): at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
05-02 09:58:50.388: W/System.err(934): at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
05-02 09:58:50.388: W/System.err(934): ... 73 more
05-02 09:58:50.758: D/AndroidRuntime(934): Shutting down VM
05-02 09:58:50.758: W/dalvikvm(934): threadid=1: thread exiting with uncaught exception (group=0xb1a39ba8)
05-02 09:58:50.808: E/AndroidRuntime(934): FATAL EXCEPTION: main
05-02 09:58:50.808: E/AndroidRuntime(934): Process: com.example.elections, PID: 934
05-02 09:58:50.808: E/AndroidRuntime(934): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.elections/com.example.elections.HomePage}: java.lang.NullPointerException
05-02 09:58:50.808: E/AndroidRuntime(934): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
05-02 09:58:50.808: E/AndroidRuntime(934): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
05-02 09:58:50.808: E/AndroidRuntime(934): at android.app.ActivityThread.access$800(ActivityThread.java:135)
05-02 09:58:50.808: E/AndroidRuntime(934): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
05-02 09:58:50.808: E/AndroidRuntime(934): at android.os.Handler.dispatchMessage(Handler.java:102)
05-02 09:58:50.808: E/AndroidRuntime(934): at android.os.Looper.loop(Looper.java:136)
05-02 09:58:50.808: E/AndroidRuntime(934): at android.app.ActivityThread.main(ActivityThread.java:5017)
05-02 09:58:50.808: E/AndroidRuntime(934): at java.lang.reflect.Method.invokeNative(Native Method)
05-02 09:58:50.808: E/AndroidRuntime(934): at java.lang.reflect.Method.invoke(Method.java:515)
05-02 09:58:50.808: E/AndroidRuntime(934): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
05-02 09:58:50.808: E/AndroidRuntime(934): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
05-02 09:58:50.808: E/AndroidRuntime(934): at dalvik.system.NativeStart.main(Native Method)
05-02 09:58:50.808: E/AndroidRuntime(934): Caused by: java.lang.NullPointerException
05-02 09:58:50.808: E/AndroidRuntime(934): at com.example.elections.HomePage.onCreate(HomePage.java:53)
05-02 09:58:50.808: E/AndroidRuntime(934): at android.app.Activity.performCreate(Activity.java:5231)
05-02 09:58:50.808: E/AndroidRuntime(934): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
05-02 09:58:50.808: E/AndroidRuntime(934): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
05-02 09:58:50.808: E/AndroidRuntime(934): ... 11 more
05-02 09:58:55.218: D/gralloc_goldfish(1074): Emulator without GPU emulation detected.
05-02 10:00:31.428: D/dalvikvm(1074): GC_FOR_ALLOC freed 139K, 6% free 3246K/3452K, paused 30ms, total 37ms
我花了很多时间搜索，但我找不到任何东西。
编辑一个：
EncryptedInteger类here
答案 0 :(得分：1)
我猜测EncryptedInteger实例指向sun.security.provider.Sun的实例。由于sun.security.provider.Sun不在您的Android应用程序的类路径中，因此它不知道如何对其进行反序列化并将其炸毁。
我认为它是SecureRandom中的EncryptedInteger。