Java 从AccessDB中提取数据时出现问题
我试图从access db中提取数据,并用以下代码填充Java 从AccessDB中提取数据时出现问题,java,swing,jdbc,jtable,Java,Swing,Jdbc,Jtable,我试图从access db中提取数据,并用以下代码填充 String[] tableColumnsName = {"col 1","col 2","col 3"}; DefaultTableModel aModel = (DefaultTableModel) jTable2.getModel(); aModel.setColumnIdentifiers(tableColumnsName); try { // the query r
String[] tableColumnsName = {"col 1","col 2","col 3"};
DefaultTableModel aModel = (DefaultTableModel) jTable2.getModel();
aModel.setColumnIdentifiers(tableColumnsName);
try {
// the query
rs = db.query("SELECT * FROM Students ");
} catch (SQLException ex) {
Logger.getLogger(RegisterGUI.class.getName()).log(Level.SEVERE, null, ex);
}
// Loop through the ResultSet and transfer in the Model
java.sql.ResultSetMetaData rsmd = null;
try {
rsmd = rs.getMetaData();
} catch (SQLException ex) {
Logger.getLogger(RegisterGUI.class.getName()).log(Level.SEVERE, null, ex);
}
//int colNo = rsmd.getColumnCount();
try {
while(rs.next()){
Object[] objects = new Object[10];
// tanks to umit ozkan for the bug fix!
for(int i=0;i<10;i++){
objects[i]=rs.getObject(i+1);
}
aModel.addRow(objects);
}
} catch (SQLException ex) {
Logger.getLogger(RegisterGUI.class.getName()).log(Level.SEVERE, null, ex);
}
jTable2.setModel(aModel);
}//GEN-LAST:event_jButton2ActionPerformed
String[]tableColumnsName={“第1列”、“第2列”、“第3列”};
DefaultTableModel aModel=(DefaultTableModel)jTable2.getModel();
aModel.setColumnIdentifiers(tableColumnsName);
试一试{
//询问
rs=db.query(“从学生中选择*);
}catch(SQLException-ex){
Logger.getLogger(RegisterGUI.class.getName()).log(Level.SEVERE,null,ex);
}
//循环遍历结果集并在模型中传输
java.sql.ResultSetMetaData rsmd=null;
试一试{
rsmd=rs.getMetaData();
}catch(SQLException-ex){
Logger.getLogger(RegisterGUI.class.getName()).log(Level.SEVERE,null,ex);
}
//int colNo=rsmd.getColumnCount();
试一试{
while(rs.next()){
Object[]objects=新对象[10];
//坦克到umit ozkan进行错误修复!
对于(inti=0;i,您正在对数据进行大量假设,并在使用完资源后将其保留为打开状态
首先,您应该使用ResultSetMetaData
构建TableModel
列信息,然后您应该使用它从ResultSet
构建行数据,例如
DefaultTableModel aModel = new DefaultTableModel();
try (ResultSet rs = db.query("SELECT * FROM Students ")) {
ResultSetMetaData rsmd = rs.getMetaData();
for (int col = 0; col < rsmd.getColumnCount(); col++) {
aModel.addColumn(rsmd.getColumnName(col + 1));
}
while (rs.next()) {
Object[] value = new Object[rsmd.getColumnCount()];
for (int col = 0; col < rsmd.getColumnCount(); col++) {
value[col] = rs.getObject(col + 1);
}
aModel.addRow(value);
}
} catch (SQLException ex) {
Logger.getLogger(RegisterGUI.class.getName()).log(Level.SEVERE, null, ex);
}
jTable2.setModel(model);
DefaultTableModel aModel=新的DefaultTableModel();
try(ResultSet rs=db.query(“从学生中选择*)){
ResultSetMetaData rsmd=rs.getMetaData();
for(int col=0;col
现在,我要构建一个实用方法,它可以接受您的查询(或表名),并返回TableModel
我得到一个错误java.sql.SQLException:[Microsoft][ODBC Driver Manager]无效的描述符索引