如何使用掩码从 JFormatedTextField 插入日期

Question

我正在开发一个应用程序，其中有一些 JFormatedTextFields 具有掩码格式（##/##/#### 为 dd/MM/YYYY）。我正在尝试将这些日期插入数据库，但显示错误 "Error Converting data type nvarchar to Date" Error Converting data type nvarchar to Date

但我在我的 sql 过程中找不到任何问题，因为如果我运行使用 sql 查询分析器的过程它正在工作，但如果我尝试从应用程序执行它显示错误

这是我的所有代码

sql 程序

if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[Proc_set_ExamDeclaration]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[Proc_set_ExamDeclaration]
GO

SET QUOTED_IDENTIFIER ON 
GO
SET ANSI_NULLS ON 
GO


CREATE  Procedure [dbo].[Proc_set_ExamDeclaration]
                     (
                    @SchoolCode nvarchar (10),
                    @ClassCode nvarchar (4),
                    @GroupName nvarchar(50),
                    @ExamCode nvarchar (4),
                    @RegistationFess numeric(38,2),
                    @RegistatinStartDate date,
                    @RegistatinEndDate date,
                    @ExamStartDate date,
                    @ExamStatus nvarchar(10)
                    )
as

BEGIN
-- Insert statements for procedure here
Declare @RFirst as Date, @REnd as Date, @EStart as Date
set @RFirst = CONVERT(varchar, @RegistatinStartDate, 103)
set @REnd = CONVERT(varchar, @RegistatinEndDate, 103)
set @EStart = CONVERT(varchar, @ExamStartDate, 103)
IF NOT EXISTS (SELECT * FROM [dbo].[ExamDeclaration] where ClassCode = @ClassCode AND GroupName = @GroupName AND ExamCode = @ExamCode AND ExamStatus = 'Active')
BEGIN
INSERT INTO ExamDeclaration (SchoolCode, ClassCode,GroupName,ExamCode,RegistationFess,RegistatinStartDate,RegistatinEndDate,ExamStartDate,ExamStatus)
VALUES (@SchoolCode, @ClassCode,@GroupName,@ExamCode,@RegistationFess,@RFirst,@REnd,@EStart,@ExamStatus)
END
ELSE 
Update ExamDeclaration 
set RegistationFess = @RegistationFess,
RegistatinStartDate = @RFirst,
RegistatinEndDate = @REnd,
ExamStartDate = @EStart,
ExamStatus = @ExamStatus
Where ClassCode = @ClassCode AND GroupName=@GroupName AND ExamCode = @ExamCode
END

GO
SET QUOTED_IDENTIFIER OFF 
GO
SET ANSI_NULLS ON 
GO

这里是 java 代码

    String School_Code = txt_SchoolCode.getText();
    String ClassCode = txt_ClassCode.getText();
    String groupName = com_groupname.getSelectedItem().toString();
    String examCode = txt_ExamCode.getText();
    String fees = txt_fees.getText();        
    String RStart = txt_RStart.getText();//((JTextField) txt_RStart.getDateEditor().getUiComponent()).getText();
    String REnd = txt_REnd.getText();//((JTextField) txt_REnd.getDateEditor().getUiComponent()).getText();
    String EStart = txt_ExamStart.getText();//((JTextField) txt_ExamStart.getDateEditor().getUiComponent()).getText();        
    String Estatus = com_eStatus.getSelectedItem().toString();
    if(ClassCode.isEmpty() && examCode.isEmpty() && fees.isEmpty() /*&& RStart.isEmpty() && REnd.isEmpty() && EStart.isEmpty()*/){JOptionPane.showMessageDialog(null, "All Fields are Required !!");}
    else{
        try{
            String sqlExamD = "Exec Proc_set_ExamDeclaration ?,?,?,?,?,?,?,?,?";
            pst=conn.prepareStatement(sqlExamD);
            pst.setString(1, School_Code);
            pst.setString(2, ClassCode);
            pst.setString(3, groupName);
            pst.setString(4, examCode);
            pst.setString(5, fees);
            pst.setString(6, RStart);
            pst.setString(7, REnd);
            pst.setString(8, EStart);
            pst.setString(9, Estatus);

            pst.execute();
            JOptionPane.showMessageDialog(null, "Saved Successfuly");
            btn_new.doClick();

        }catch(Exception e){
            JOptionPane.showMessageDialog(null, e);
        }
    }

知道我的代码中的问题在哪里吗？

我正在使用 java netbeans 和 sql server 2008

谢谢。

Answer 1

在我看来，您将 Java 中的日期变量分配为字符串，但实际上将它们定义为日期：

String RStart = txt_RStart.getText();
...
@RegistatinStartDate date

然后您尝试将 date 转换为 varchar，但又将其分配回日期？

Declare @RFirst as Date
...
set @RFirst = CONVERT(varchar, @RegistatinStartDate, 103)

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