[英]how to retrive the data from database and show on JLabel in netbeans
我正在Netbeans中进行项目,并希望在从JComboBox
选择员工时在JLabel
上显示员工详细信息。
我尝试过...但是对框架没有影响。
private void formWindowOpened(java.awt.event.WindowEvent evt) {
try {
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://localhost:3306/tnpcb","root","");
String sql="select curr_no,receive_date from tapal where user_id='"+jComboBox1.getSelectedItem()+"'";
pst=con.prepareStatement(sql);
rs=pst.executeQuery();
while(rs.next())
{
System.out.println("hi22");
jLabel1.setText(rs.getString("curr_no"));
jLabel1.setText(rs.getString("receive_date"));
}
}
catch(ClassNotFoundException | SQLException e)
{
}
}
尝试用try和catch包围我们的代码
试试{pst = con.prepareStatement(sql);
rs=pst.executeQuery();
while(rs.next())
{
System.out.println("hi22");
jLabel1.setText(rs.getString("curr_no"));
jLabel1.setText(rs.getString("receive_date"));
}
} catch(Exception e){}
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