[英]Loop only returns first row
我试图将数据库的结果加载到一个jtable中,但是当我运行代码时,它只显示第一行,然后出错,没有发现数据异常。 这是我的代码;
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
String url = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb, *.accdb)};DBQ=" + "C:\\Users\\PMatope.FMBMW.000\\Documents\\Library.accdb";
conn = DriverManager.getConnection(url, "", "");
st = conn.createStatement();
ResultSet rs = st.executeQuery("SELECT ID,full_name,sex,course,contact,email FROM Person");
ResultSetMetaData data = rs.getMetaData();
DefaultTableModel model = (DefaultTableModel) jTable1.getModel();
// jTable1.setModel(model);
while (rs.next()) {
String id,fname,sex,course,contact,email;
id = rs.getString("ID");
fname = rs.getString("full_name");
sex = rs.getString("sex");
course = rs.getString("course");
contact = rs.getString("contact");
email = rs.getString("email");
model.addRow(new Object[] {id,fname,sex,course,contact,email});
model.fireTableDataChanged();
JOptionPane.showMessageDialog(null, rs.getString("sex"));
}
} catch (Exception e) {
JOptionPane.showMessageDialog(null,"Message: "+ e.getMessage());
}
你需要初始化
DefaultTableModel model = (DefaultTableModel) jTable1.getModel();
在您的while循环中
首先声明您的表模型,并为每个循环时间创建一个新实例。
例如。 :
DefaultTableModel model = null;
// jTable1.setModel(model);
while (rs.next()) {
model = (DefaultTableModel) jTable1.getModel();
String id,fname,sex,course,contact,email;
id = rs.getString("ID");
fname = rs.getString("full_name");
sex = rs.getString("sex");
course = rs.getString("course");
contact = rs.getString("contact");
email = rs.getString("email");
model.addRow(new Object[] {id,fname,sex,course,contact,email});
model.fireTableDataChanged();
JOptionPane.showMessageDialog(null, rs.getString("sex"));
}
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