好的,我做了一个新的更新 Jtable 代码,但它不起作用,你能帮我理解为什么吗?
代码如下:
private void update(){
DefaultTableModel modelo = new DefaultTableModel();
try{
Connection lig;
lig = DriverManager.getConnection("jdbc:mysql://localhost/bdteste","root","");
PreparedStatement inst;
inst = (PreparedStatement) lig.createStatement();
ResultSet res;
res = inst.executeQuery("SELECT * FROM pessoa");
while(res.next()){
int id = res.getInt("ID");
String descriçao = res.getString("Descriçao");
double montante = res.getDouble("Montante");
String categoria = res.getString("Categoria_Extrato");
model.addRow(new Object[]{id, descriçao, montante, categoria});
}
res.close();
inst.close();
lig.close();
}
catch(SQLException ex){
JOptionPane.showMessageDialog(null, "Erro na base de dados!");
}
recdadostbl.setModel(modelo);
}
事情是这样的: Me inserting the data Error1
最佳答案
我想我找到了问题的解决方案。
当我进入表格面板时,我删除所有表格 model.setRowCount(0);
,然后使用此方法再次插入所有新旧数据,
public void updatetbl()
{
try {
Connection lig;
lig = DriverManager.getConnection("jdbc:mysql://localhost/financas","root","");
Statement inst;
inst = lig.createStatement();
ResultSet res = inst.executeQuery("SELECT * FROM extrato");
while(res.next()){
int id = res.getInt("ID");
String descriçao = res.getString("Descriçao");
double montante = res.getDouble("Montante");
String categoria = res.getString("Categoria_Extrato");
model.addRow(new Object[]{id, descriçao, montante, categoria});
}
}
catch(SQLException ex){
JOptionPane.showMessageDialog(null,"Base de Dados Indisponivel"+ex );
}
}
关于java - 当我更新 JTable 中的数据库时,我得到多个项目,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/44661820/