BufferedReader，csv，如何将int作为参数传递(参数是一个对象)

Question

我正试图将通过缓冲读取器提供的文件中的字符串转换为所需对象(卡片、对象)的链接，作为创建新对象(购买)的参数。

1. 我的卡片存储在一个哈希图中
2. 我购买的东西存储在一个哈希图中
3. 我的卡在启动时使用缓冲读卡器加载到程序中
4. 我购买的将在启动时使用缓冲读取器加载到程序中

错误为

找不到适合put(int，cards)的方法
方法Map.put(Integer，purchase)不适用
(参数不匹配；卡片无法转换为purchase(参数不匹配；卡无法转换为购买)

这是我的购买类别：

public class purchase
{
int receiptId;
cards cards1;
int time;
private double men; 
private double women;
private double kids;
private double home;
private double sport;
public purchase(int receiptId, cards cards1, double men, double women, double kids, double home, double sport)
{
this.receiptId = receiptId;
this.cards1 = cards1;
this.men = men;
this.women = women;
this.kids = kids;
this.home = home;
this.sport = sport;
}

以下是HashMap的创建：

private static HashMap<Integer, purchase> purchaseMap = new HashMap<Integer, purchase>(); 
private static HashMap<Integer, cards> map = new HashMap<Integer, cards>();

这是一种类型的卡代码(basicCard扩展RegisteredCard，RegisteredCards扩展cards)。

public class basicCard extends registeredCards
{
private String name;
private String email;
double balance;
int id;
double points;
public basicCard(String name, String email, double balance, int id, double points)
{
super(name, email, balance, id, points);
this.name = name;
this.email = email;
this.balance = balance;
this.id = id;
this.points = points;   
}

这是卡片的csv.txt文件

b,basictestnew1,[e-mail],0.0,1,0.0
p,basictestnew1,[e-mail],0.0,2,0.0
a,0.0,3,0.0

这是购买的csv.txt文件

1,null,10.0,10.0,10.0,10.0,10.0
2,1,10.0,10.0,10.0,10.0,10.0,10.0
3,2,10.0,10.0,10.0,10.0,10.0,10.0

以下是卡和购买的BufferedReaders

try 
{
BufferedReader in = new BufferedReader(new FileReader("cardData.txt")); 
String line;
line = in.readLine ();
while (line != null)   
{
String[] field = line.split(",");
if ( field[0] .equals("b") )
{
basicCard b2 = new basicCard(field[1], field[2], Double.parseDouble(field[3]), Integer.parseInt(field[4]), Double.parseDouble(field[5]));
System.out.println("Basic card created after BufferedReader split");
map.put(b2.getid(), b2);
cardsList.add(b2.getid()); 
line = in.readLine ();
}
else if ( field[0] .equals("p") )
{    
premiumCard p2 = new premiumCard(field[1], field[2], Double.parseDouble(field[3]), Integer.parseInt(field[4]), Double.parseDouble(field[5]));
System.out.println("Premium card created after BufferedReader split"); 
map.put(p2.getid(), p2);
cardsList.add(p2.getid());
line = in.readLine();
}
else if ( field[0] .equals("a") )
{     
anonCard a2 = new anonCard(Double.parseDouble(field[1]),Integer.parseInt(field[2]),Double.parseDouble(field[3]));    
System.out.println("Anon card created after buffered reader split");
map.put(a2.getid(), a2);
cardsList.add(a2.getid()); 
line = in.readLine();
}
}
in.close ();
BufferedReader in1 = new BufferedReader(new FileReader("purchaseData.txt")); 
String line1; 
line1 = in1.readLine();
while (line1 != null )
{
String[] field1 = line.split(",");
int cardInt; 
int receiptId;
receiptId = Integer.parseInt(field1[0]); 
cards cards3;
cardInt = Integer.parseInt(field1[1]);
cards3 = map.get(cardInt);
purchase p2 = new purchase(Integer.parseInt(field1[0]), map.get(cardInt), Double.parseDouble(field1[2]), Double.parseDouble(field1[3]), Double.parseDouble(field1[4]), Double.parseDouble(field1[5]), Double.parseDouble(field1[6]));
purchaseMap.put(receiptId, cards3);
}
in1.close(); 
}
catch (IOException e) 
{
System.out.println(e.getMessage()); 
}

Answer 1

您的代码

BufferedReader in1 = new BufferedReader(new FileReader("purchaseData.txt")); 
String line1; 
line1 = in1.readLine();
while (line1 != null )
{
String[] field1 = line.split(",");
int cardInt; 
int receiptId;
receiptId = Integer.parseInt(field1[0]); 
cards cards3;
cardInt = Integer.parseInt(field1[1]);
cards3 = map.get(cardInt);
purchase p2 = new purchase(Integer.parseInt(field1[0]), map.get(cardInt), Double.parseDouble(field1[2]), Double.parseDouble(field1[3]), Double.parseDouble(field1[4]), Double.parseDouble(field1[5]), Double.parseDouble(field1[6]));
purchaseMap.put(receiptId, cards3);
}

在这里，您试图将cards3对象(即卡片类型)放入purchaseMap中，其中purchaseMap允许放置购买类型对象。

如果您的代码类似于purchaseMap.put(receiptId，p2)，则不会出现错误

其中p2是购买类型对象。

只需将卡片3替换为p2即可。

你的代码应该像下面的

BufferedReader in1 = new BufferedReader(new FileReader("purchaseData.txt")); 
String line1; 
line1 = in1.readLine();
while (line1 != null )
{
String[] field1 = line.split(",");
int cardInt; 
int receiptId;
receiptId = Integer.parseInt(field1[0]); 
cards cards3;
cardInt = Integer.parseInt(field1[1]);
cards3 = map.get(cardInt);
purchase p2 = new purchase(Integer.parseInt(field1[0]), map.get(cardInt), Double.parseDouble(field1[2]), Double.parseDouble(field1[3]), Double.parseDouble(field1[4]), Double.parseDouble(field1[5]), Double.parseDouble(field1[6]));
purchaseMap.put(receiptId, p2);
}