【发布时间】：2016-07-28 11:14:47
【问题描述】：
我无法将 jDateChooser 的日期插入到我的 oracle 数据库中。下面是staffDisplay 类中的动作事件。
`public void saveButtonPressed(ActionEvent e){
try{
int result = staff.addStaff(
firstNameTextField.getText(),
lastNameTextField.getText(),
dateOfBirthDateChooser.getDate(),
departmentTextField.getText(),
Double.parseDouble(salaryTextField.getText()),
startDateDateChooser.getDate(),
Boolean.parseBoolean(fullTimeTextField.getText()));
if(result == 1){//it worked
JOptionPane.showMessageDialog(this,"Staff Member Added Successfully");
}else{//didn't work
JOptionPane.showMessageDialog(this, "Error Occured - Staff member was not added");
}`
这是准备好的语句在不同的类中。
`public class StaffQueries {
private static final String URL = "jdbc:oracle:thin:@localhost:1521:xe";
private static final String USERNAME = "xxx";
private static final String PASSWORD = "xxx";
private Connection con;
private PreparedStatement insert = null;
public StaffQueries() {
try{
Class.forName("oracle.jdbc.driver.OracleDriver");
con = DriverManager.getConnection(URL,USERNAME,PASSWORD);
System.out.println("Drivers loaded and connection made");
insert = con.prepareStatement("INSERT INTO STAFF " + "(StaffID, FirstName, LastName, DateOfBirth, Department, Salary, StartDate, Fulltime)"
+ "VALUES(ColmStaffSequence.NextVal,?,?,?,?,?,?,?)");
}catch(SQLException e){
System.out.println("something went wrong with the DataBase");
e.printStackTrace();
System.exit(1);
}catch(Exception e){
System.out.println("something went wrong when loading the drivers");
e.printStackTrace();
System.exit(2);
}
}
public int addStaff(String fn, String ln, Date dob, String d, double sal, Date sd, boolean ft){
int results = 0;
try{
//fill in the missing parameters for the prepared insert statement
insert.setString(1, fn);
insert.setString(2, ln);
insert.setDate(3, dob);
insert.setString(4, d);
insert.setDouble(5, sal);
insert.setDate(6, sd);
insert.setBoolean(7, ft);
//execute the prepared insert statement
results = insert.executeUpdate();
} catch (SQLException e){
e.printStackTrace();
close();
}
return results;
}`
有错误信息说
`Exception in thread "AWT-EventQueue-0" java.lang.Error: Unresolved compilation problem:
The method addStaff(java.lang.String, java.lang.String, java.sql.Date, java.lang.String, double, java.sql.Date, boolean) in the type StaffQueries is not applicable for the arguments (java.lang.String, java.lang.String, java.util.Date, java.lang.String, double, java.util.Date, boolean)`
所以我认为插入到 jdatechooser 的日期输入为 java.util.date，我需要它是 java.sql.date？如果这是问题？如果是这样，我如何将其转换为 java.sql.date？谢谢。
【问题讨论】：
-
在 StaffQueries 中将导入从
java.sql.Date更改为java.util.Date -
我改变了这个并且出现了一个新的异常。
java.lang.ClassCastException: java.util.Date cannot be cast to java.sql.Date。我理解为什么 util.date 不能转换为 sql.date 但我不知道如何在代码中更正这一点。你有什么建议吗？
标签： java oracle java.util.date