Question

我有这两部分代码。

添加到arraylist不起作用，f arrylist始终为空。在输出调试窗口中，我收到的唯一消息是每个Fattura的Unparseable date：“2014-12-09 00：00：00.0”。

private ArrayList<Fattura> getFatture() throws SQLException {

    String localDb;
    String unformattedQuery;

    ArrayList<Fattura> ftt = new ArrayList<Fattura>();

    if (this.serviceSelection.getSelectedItem() == "Energia") {
        localDb = EmailCheckerGUI.DbEnergia;
        unformattedQuery = ServiceQuery.RECUPERAFATTUREENERGIA.getQuery();

    } else {
        localDb = EmailCheckerGUI.DbGas;
        unformattedQuery = ServiceQuery.RECUPERAFATTUREGAS.getQuery();
    }

    DbHandlerContext db = new DbHandlerContext(new SqlServerConcrete(EmailCheckerGUI.user, EmailCheckerGUI.pwd, localDb));

    String formattedQuery = String.format(unformattedQuery,
            BillIntervalContainer.getFormattedMinDataFatt("MM/dd/yyyy"),
            BillIntervalContainer.getFormattedMaxDataFatt("MM/dd/yyyy"),
            BillIntervalContainer.minFattNumber, BillIntervalContainer.maxFattNumber);

    ResultSet r = db.executeQuery(formattedQuery);

    while (r.next()) {
        try {

            boolean addingelement = false;
            String ioError = "";

            try {

                addingelement = ftt.add(new Fattura(r.getInt("id"), r.getString("servizio"), r.getString("email"),
                        r.getString("denominazione"), r.getString("data_fattura"), r.getString("data_scadenza"), r.getString("path_fattura"),
                        r.getInt("inviato"), r.getString("report"), r.getInt("numero_fattura"), r.getInt("id_documento")));

            } catch (IOException ex) {
                Logger.getLogger(EmailCheckerGUI.class.getName()).log(Level.SEVERE, null, ex);
                ioError = ex.getMessage();
            }

            if (!addingelement) { 
                if (!"".equals(ioError)) {
                    addToLog("Impossibile aggiungere alla lista di invii la fattura numero " + r.getString("numero_fattura"));
                } else {
                    addToLog("Impossibile aggiungere alla lista di invii la fattura numero " + r.getString("numero_fattura") + ": " + ioError);
                }
            } else {
                System.out.println(r.getString("numero_fattura"));
            }

        } catch (ParseException ex) {
            System.out.println(ex.getMessage());
        }
    }

    return ftt;
}

和

Fattura( int id, String service, String email,  
         String name, String dateBill, String dateScad, String path, 
         int sent, String report, int billNumber, int idDocument) throws ParseException, IOException{

    this.id = id;
    this.service = service;
    this.email = email;
    this.name = name;
    this.path = path;
    this.report = report;
    this.sent = sent;
    this.billNumber = billNumber;

    this.dateBill = new SimpleDateFormat("yyyy-MM-dd").parse(dateBill);
    this.dateScad = new SimpleDateFormat("yyyy-MM-dd").parse(dateScad);
    this.idDocument = idDocument;

    this.pdfDocument = new PdfValidator(null, this.name, dateBill, String.valueOf(this.billNumber), String.valueOf(0), this.path);

}

知道我哪里错了吗？感谢

Answer 1

您正在使用周年：YYYY而非年yyyy。请查看SimpleDateFormat documentation。您将找到所有模式和一些有用的示例。

现在yyyy-MM-dd只会解析2014-12-09。如果你还有时间，你应该使用如下： yyyy-MM-dd HH:mm:ss.S

Answer 2

或者您可以使用.format代替.parse：

this.dateBill  = new SimpleDateFormat("yyyy-MM-dd").format(new Date());

但请注意MM不能小写。

Java日期解析字符串（Unparseable date）

2 个答案: