我正尝试使用Java JDBC更新我的表。但我不知道如何使用准备好的语句来调用我的主键。我尝试为我的数据库的列创建一个USER_ID
对象,但不知道从何处开始。我将如何确定我是否已经更新了我的数据库?如何获得执行select语句的主键
INSERT
private void addBtnActionPerformed(java.awt.event.ActionEvent evt) {
String inputEmployee = employeeTf.getText();
String inputDepartment = departmentTf.getText();
if(inputEmployee.isEmpty() && inputDepartment.isEmpty()){
JOptionPane.showMessageDialog(null, "Please fill up!");
}
else if(inputEmployee.isEmpty()){
JOptionPane.showMessageDialog(null, "Please enter your username");
}
else if(inputDepartment.isEmpty()){
JOptionPane.showMessageDialog(null, "Please enter your password");
}
else{
String myQuery = "INSERT INTO SAMPLE (EMPLOYEENAME,DEPARTMENT) VALUES (?,?)";
try(Connection con = DBUtilities.getConnection(DBType.JDBC);
PreparedStatement myPs = con.prepareStatement(myQuery);
){
myPs.setString(1, employeeTf.getText());
myPs.setString(2, departmentTf.getText());
myPs.executeUpdate();
System.out.print("Record is inserted");
} catch (SQLException ex) {
DBUtilities.processException(ex);
}
}
}
在这里,如果我插入一个新值,它会载入新值的数据库。
SELECT
private void searchBtnActionPerformed(java.awt.event.ActionEvent evt) {
String searchEmployee = searchName.getText(); //SWING COMPONENTS
String searchDept = searchDepartment.getText();//SWING COMPONENTS
String selectQuery = "SELECT EMPLOYEENAME,DEPARTMENT FROM SAMPLE WHERE USER_ID = ?";
try {
Connection con = DBUtilities.getConnection(DBType.JDBC);
PreparedStatement myPs = con.prepareStatement(selectQuery,ResultSet.CONCUR_UPDATABLE,ResultSet.TYPE_SCROLL_INSENSITIVE);
ResultSet myRs = myPs.executeQuery();
while(myRs.next()){
String name = myRs.getString(1);
String department = myRs.getString(2);
}
} catch (SQLException ex) {
DBUtilities.processException(ex);
}
}
SCREENSHOT
填写字段searchName后和searchDepartment文本框。正如你在这里看到的,我在这里点击“搜索”按钮。 我想searchName和searchDepartment的值将打印出employeeTf和departmentTf 的文本字段我怎么会在这里使用的setText?
张贴您的摆动部件定义 – Musaddique
已编辑摆动部件。谢谢。请再次检查我的帖子。 – Francisunoxx