用JAVA将多值文件加载到ArrayList中

Question

我有一个包含这类内容的html" target="_blank">文件：

AccountNumber=1000，BranchName='11'，Balance=420，CustomerNumber=1

private static void loadAccounts() throws IOException, ClassNotFoundException {
static ArrayList<Account> accounts = new ArrayList<Account>();
    FileInputStream fileInputStream = new FileInputStream("AccountFile");
    ObjectInputStream objectInputStream = new ObjectInputStream(fileInputStream);
    accounts = (ArrayList<Account>) objectInputStream.readObject();
    objectInputStream.close();
}

线程“main”java.io.StreamcorreptedException：无效的流头:6163636f在java.io.objectinPutStream.ReadStreamHeader(ObjectInPutStream.java:938)在java.io.objectInPutStream.(ObjectInPutStream.(objectInPutStream.java:396)，在main.main(main.java:18)在main.loadAccounts(main.java:151)在main.main(main.java:18)

Answer 1

Java没有自动将这些行转换为account对象的解决方案，您需要自己实现。下面是一个如何使其工作的示例，假设线条模式不变：

    private static void loadAccounts() throws IOException, ClassNotFoundException {
        List<Account> accounts = new ArrayList<Account>();
        final FileReader fileReader = new FileReader("AccountFile");
        final BufferedReader bufferedReader = new BufferedReader(fileReader);
        String line = bufferedReader.readLine();

        while ( line != null) {
            final String[] split = line.split(",");
            final Map<String, String> map = new HashMap<>();
            for (String entry : split) {
                final String[] keyAndValue = entry.split("=");
                map.put(keyAndValue[0], keyAndValue[1]);
            }
            Account account = new Account();
            account.setAccountNumber(map.get("accountNumber"));
            account.setBranchName(map.get("branchName"));
            account.setBalance(map.get("balance"));
            account.setBranchName(map.get("customerNumber"));
            
            accounts.add(account);
            line = bufferedReader.readLine();
        }

        fileReader.close();
        bufferedReader.close();
    }