Java中的数据反序列化
我试图从数组列表中读取玩家数据，但经过2小时的搜索和实验，我迷路了 下面是反序列化代码。虽然有注释，但基本上应该有一个包含播放器对象的序列化ArrayList的文件。我想反序列化该数据并将其存储在savedPlayers中，然后将savedPlayers用于一些事情 我做错了什么？Java中的数据反序列化,java,serialization,Java,Serialization,我试图从数组列表中读取玩家数据，但经过2小时的搜索和实验，我迷路了 下面是反序列化代码。虽然有注释，但基本上应该有一个包含播放器对象的序列化ArrayList的文件。我想反序列化该数据并将其存储在savedPlayers中，然后将savedPlayers用于一些事情 我做错了什么？ import java.io.*; import java.util.*; public class RoofRunnerApp { private Scanner in; // Sca
import java.io.*;
import java.util.*;
public class RoofRunnerApp {
private Scanner in; // Scanner to take playerName input.
private RoofRunnerGame gameTime;
private String filename = "gameData.txt";
public static void main (String[] args) {
System.out.println("WELCOME TO *ROOF RUNNER* \n"); // Welcomes user with game title.
RoofRunnerApp myGame = new RoofRunnerApp();
}
public RoofRunnerApp() {
// 1) Read in name from user.
in = new Scanner(System.in);
System.out.print("Please enter your name: ");
String playerName = in.next();
// 2) Create Player arrayList.
ArrayList<Player> savedPlayers = new ArrayList<Player>();
// 3) Read in Serialized Data from file.
try {
ObjectInputStream input = new ObjectInputStream(new FileInputStream(filename)); // Add file name.
savedPlayers = (ArrayList<Player>)input.readObject();
input.close();
} catch( Exception e ) {
e.printStackTrace();
return;
}
Player thisPlayer; //thisPlayer is passed to Game class.
// 4) if arraylist != empty -> Check for playerName and inputName match.
////// If there's a match -> Set thisPlayer equal to the savedPlayer, using the Player constructor.
if(savedPlayers.length() != 0)
for(int i = 0; i < savedPlayers.length(); i++)
if(playerName.equals(savedPlayers.getName())){
thisPlayer = new Player(savedPlayers[i]);
break;
}
}
else
thisPlayer = new Player(playerName); // If no match -> Set thisPlayer to new player with playerName.
RoofRunnerGame gameTime = new RoofRunnerGame(thisPlayer);
}
import java.io.*；
导入java.util.*；
公共类屋顶{
中的专用扫描仪；//用于获取playerName输入的扫描仪。
私人屋顶奔跑者游戏时间；
私有字符串filename=“gameData.txt”；
公共静态void main（字符串[]args）{
System.out.println（“欢迎使用*ROOF RUNNER*\n”）；//欢迎使用游戏标题的用户。
rootrunnerapp myGame=新的rootrunnerapp（）；
}
公共屋顶{
//1）从用户处读入名称。
in=新扫描仪（System.in）；
System.out.print（“请输入您的姓名：”）；
字符串playerName=in.next（）；
//2）创建播放器阵列列表。
ArrayList savedPlayers=new ArrayList（）；
//3）从文件中读入序列化数据。
试一试{
ObjectInputStream输入=新ObjectInputStream（新文件输入流（文件名））；//添加文件名。
savedPlayers=（ArrayList）input.readObject（）；
input.close（）；
}捕获（例外e）{
e、 printStackTrace（）；
返回；
}
Player thisPlayer；//thisPlayer被传递到游戏类。
//4）如果arraylist！=空->检查playerName和inputName是否匹配。
//////如果存在匹配->使用播放器构造函数将此播放器设置为等于savedPlayer。
如果（savedPlayers.length（）！=0）
对于（int i=0；i将此玩家设置为具有playerName的新玩家。
屋顶跑步者游戏时间=新的屋顶跑步者游戏（该玩家）；
}
import java.io.*;
import java.util.*;
public class RoofRunnerApp {
private Scanner in; // Scanner to take playerName input.
private RoofRunnerGame gameTime;
private String filename = "gameData.txt"; // File to hold Serialized Player data.
public static void main (String[] args) {
System.out.println("WELCOME TO *ROOF RUNNER* \n"); // Welcomes user with game title.
RoofRunnerApp myGame = new RoofRunnerApp();
}
public RoofRunnerApp() {
// 1) Read in name from user.
in = new Scanner(System.in);
System.out.print("Please enter your name: ");
String playerName = in.next();
// 2) Create Player arrayList.
ArrayList<Player> savedPlayers = new ArrayList<Player>();
// 3) Read in Serialized Data from file.
try {
ObjectInputStream input = new ObjectInputStream(new FileInputStream(filename)); // Add file name.
savedPlayers = (ArrayList<Player>)input.readObject();
input.close();
} catch( Exception e ) {
e.printStackTrace();
return;
}
Player thisPlayer; //thisPlayer is passed to Game class.
// 4) if arraylist != empty -> Check for playerName and inputName match.
////// If there's a match -> Set thisPlayer equal to the savedPlayer, using the Player constructor.
if(savedPlayers.length() != 0)
for(int i = 0; i < savedPlayers.length(); i++)
if(playerName.equals(savedPlayers[i].getName())){
thisPlayer = new Player(savedPlayers[i]);
break;
}
}
else
thisPlayer = new Player(playerName); // If no match -> Set thisPlayer to new player with playerName.
RoofRunnerGame gameTime = new RoofRunnerGame(thisPlayer);
// After:
// Exit code in RRG
// 1) Add current Player to current ArrayList.
/*
// Create/Return player objects.
Player p = new Player(playerObject)
savedPlayers.add(p);
///// Save data to file.
ObjectOutputStream out = null;
try {
out = new ObjectOutputStream( new FileOutputStream( "myfile") ); // Add filename.
out.writeObject( savedPlayer ); //write the entire ArrayList
out.close();
} catch( IOException e ) {
e.printStackTrace();
return;
}
*/
}
}
import java.io.*；
导入java.util.*；
公共类屋顶{
中的专用扫描仪；//用于获取playerName输入的扫描仪。
私人屋顶奔跑者游戏时间；
私有字符串filename=“gameData.txt”；//保存序列化玩家数据的文件。
公共静态void main（字符串[]args）{
System.out.println（“欢迎使用*ROOF RUNNER*\n”）；//欢迎使用游戏标题的用户。
rootrunnerapp myGame=新的rootrunnerapp（）；
}
公共屋顶{
//1）从用户处读入名称。
in=新扫描仪（System.in）；
System.out.print（“请输入您的姓名：”）；
字符串playerName=in.next（）；
//2）创建播放器阵列列表。
ArrayList savedPlayers=new ArrayList（）；
//3）从文件中读入序列化数据。
试一试{
ObjectInputStream输入=新ObjectInputStream（新文件输入流（文件名））；//添加文件名。
savedPlayers=（ArrayList）input.readObject（）；
input.close（）；
}捕获（例外e）{
e、 printStackTrace（）；
返回；
}
Player thisPlayer；//thisPlayer被传递到游戏类。
//4）如果arraylist！=空->检查playerName和inputName是否匹配。
//////如果存在匹配->使用播放器构造函数将此播放器设置为等于savedPlayer。
如果（savedPlayers.length（）！=0）
对于（int i=0；i将此玩家设置为具有playerName的新玩家。
屋顶跑步者游戏时间=新的屋顶跑步者游戏（该玩家）；
//之后：
//RRG中的退出代码
//1）将当前播放器添加到当前ArrayList。
/*
//创建/返回播放器对象。
玩家p=新玩家（玩家对象）
savedPlayers.add（p）；
/////将数据保存到文件。
ObjectOutputStream out=null；
试一试{
out=newobjectoutputstream（newfileoutputstream（“myfile”）；//添加文件名。
writeObject（savedPlayer）；//写入整个ArrayList
out.close（）；
}捕获（IOE异常）{
e、 printStackTrace（）；
返回；
}
*/
}
}
import java.io.*;
import java.util.*;
public class RoofRunnerApp {
private Scanner in; // Scanner to take playerName input.
private RoofRunnerGame gameTime;
private String filename = "gameData.txt"; // File to hold Serialized Player data.
public static void main (String[] args) {
System.out.println("WELCOME TO *ROOF RUNNER* \n"); // Welcomes user with game title.
RoofRunnerApp myGame = new RoofRunnerApp();
}
public RoofRunnerApp() {
// 1) Read in name from user.
in = new Scanner(System.in);
System.out.print("Please enter your name: ");
String playerName = in.next();
// 2) Create Player arrayList.
ArrayList<Player> savedPlayers = new ArrayList<Player>();
// 3) Read in Serialized Data from file.
try {
ObjectInputStream input = new ObjectInputStream(new FileInputStream(filename)); // Add file name.
savedPlayers = (ArrayList<Player>)input.readObject();
input.close();
} catch( Exception e ) {
e.printStackTrace();
return;
}
Player thisPlayer; //thisPlayer is passed to Game class.
// 4) if arraylist != empty -> Check for playerName and inputName match.
////// If there's a match -> Set thisPlayer equal to the savedPlayer, using the Player constructor.
if(savedPlayers.length() != 0)
for(int i = 0; i < savedPlayers.length(); i++)
if(playerName.equals(savedPlayers[i].getName())){
thisPlayer = new Player(savedPlayers[i]);
break;
}
}
else
thisPlayer = new Player(playerName); // If no match -> Set thisPlayer to new player with playerName.
RoofRunnerGame gameTime = new RoofRunnerGame(thisPlayer);
// After:
// Exit code in RRG
// 1) Add current Player to current ArrayList.
/*
// Create/Return player objects.
Player p = new Player(playerObject)
savedPlayers.add(p);
///// Save data to file.
ObjectOutputStream out = null;
try {
out = new ObjectOutputStream( new FileOutputStream( "myfile") ); // Add filename.
out.writeObject( savedPlayer ); //write the entire ArrayList
out.close();
} catch( IOException e ) {
e.printStackTrace();
return;
}
*/
}
}
import java.io.*；
导入java.util.*；
公共类屋顶{
中的专用扫描仪；//用于获取playerName输入的扫描仪。
私人屋顶奔跑者游戏时间；
私有字符串filename=“gameData.txt”；//保存序列化玩家数据的文件。
公共静态void main（字符串[]args）{
System.out.println（“欢迎使用*ROOF RUNNER*\n”）；//欢迎使用游戏标题的用户。
rootrunnerapp myGame=新的rootrunnerapp（）；
}
公共屋顶{
//1）从用户处读入名称。
in=新扫描仪（System.in）；
System.out.print（“请输入您的姓名：”）；
字符串playerName=in.next（）；
//2）创建播放器阵列列表。
ArrayList savedPlayers=new ArrayList（）；
for (Player player : players) {
// do something with each Player
}
import java.io.*;
import java.util.*;
public class RoofRunnerApp {
private Scanner in; // Scanner to take playerName input.
private RoofRunnerGame gameTime;
private String filename = "gameData.txt"; // File to hold Serialized Player data.
public static void main (String[] args) {
System.out.println("WELCOME TO *ROOF RUNNER* \n"); // Welcomes user with game title.
RoofRunnerApp myGame = new RoofRunnerApp();
}
public RoofRunnerApp() {
// 1) Read in name from user.
in = new Scanner(System.in);
System.out.print("Please enter your name: ");
String playerName = in.next();
// 2) Create Player arrayList.
ArrayList<Player> savedPlayers = new ArrayList<Player>();
// 3) Read in Serialized Data from file.
try {
ObjectInputStream input = new ObjectInputStream(new FileInputStream(filename)); // Add file name.
savedPlayers = (ArrayList<Player>)input.readObject();
input.close();
} catch( Exception e ) {
e.printStackTrace();
return;
}
boolean notFound = true;
Player thisPlayer; //thisPlayer is passed to Game class.
// 4) if arraylist != empty -> Check for playerName and inputName match.
////// If there's a match -> Set thisPlayer equal to the savedPlayer, using the Player constructor.
if(savedPlayers.size() != 0){
for(int i = 0; i < savedPlayers.size(); i++){
if(playerName.equals(savedPlayers.get(i).getName())){
thisPlayer = new Player(savedPlayers.get(i));
notFound = false;
break;
}
}
}
if(savedPlayers.size() == 0 || notFound)
thisPlayer = new Player(playerName); // If no match -> Set thisPlayer to new player with playerName.
RoofRunnerGame gameTime = new RoofRunnerGame(thisPlayer);
}