如何更新 JTable 中的数据？ （带代码）

Question

我有一个使用 Eclipse 创建并使用 Vector 对象填充该表的 JTable。我希望在对 jtable 进行更改后更新数据库（将数据提供给我的 jtable）。我真的不知道我该怎么做。一些建议？ 我使用这段代码来填充 JTable：

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.HeadlessException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.Statement;
import java.util.Vector;
import java.util.logging.Level;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingWorker;
import javax.swing.WindowConstants;
import javax.swing.table.DefaultTableModel;

public class provemain2 {



 public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                new provemain2();
            }
        });
    }

    private final JButton button;
    private final JTable table;
    private final DefaultTableModel tableModel = new DefaultTableModel();

    public provemain2() throws HeadlessException {

        JFrame one =new JFrame();

        one.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        one.setVisible(true);

        table = new JTable(tableModel);
        one.add(new JScrollPane(table), BorderLayout.CENTER);

        button = new JButton("Load Data");
        button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                new SwingWorker<Void, Void>() {
                    @Override
                    protected Void doInBackground() throws Exception {
                        loadData();
                        return null;
                    }
                }.execute();
            }
        });
        one.add(button, BorderLayout.PAGE_START);

        one.setSize(640, 480);
    }

    private void loadData() {
        //LOG.info("START loadData method");

        button.setEnabled(false);

        try (Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/mydb", "root","psw");
                Statement stmt = conn.createStatement()) {

            ResultSet rs = stmt.executeQuery("select * from Acquirenti");
            ResultSetMetaData metaData = rs.getMetaData();

            // Names of columns
            Vector<String> columnNames = new Vector<String>();
            int columnCount = metaData.getColumnCount();
            for (int i = 1; i <= columnCount; i++) {
                columnNames.add(metaData.getColumnName(i));
            }

            // Data of the table
            Vector<Vector<Object>> data = new Vector<Vector<Object>>();
            while (rs.next()) {
                Vector<Object> vector = new Vector<Object>();
                for (int i = 1; i <= columnCount; i++) {
                    vector.add(rs.getObject(i));
                }
                data.add(vector);
            }

            tableModel.setDataVector(data, columnNames);
        } catch (Exception e) {
            //LOG.log(Level.SEVERE, "Exception in Load Data", e);
        }
        button.setEnabled(true);

        //LOG.info("END loadData method");
    }

}

Answer 1

此代码可以帮助您解决问题，

 Dbconnection obj=new Dbconnection();
       rs=obj.getAllworkers();
        Vector v1=new Vector();
        v1.addElement("ID");
        v1.addElement("NAME");
        v1.addElement("STATE");
        v1.addElement("MOB");
        Vector v3=new Vector();
        try{
        while(rs.next())
        {
            Vector v2=new Vector();
            v2.addElement(rs.getString(8));
            v2.addElement(rs.getString(2));
            v2.addElement(rs.getString(6));
            v2.addElement(rs.getString(7));
        v3.add(v2);
        }
        }catch(Exception e){}
        JTable wrkr_table=new JTable(v3, v1);

        JScrollPane scp=new JScrollPane(wrkr_table);

这里 8,2,6,7 是基于查询的适当列号

rs是结果集对象