netbeansでコンソールからデータを取得する方法は？

Question

sparqlを使用している私のデータを取得するJavaプログラムは、netbeansの出力領域にテーブル出力を与えます。このステートメント

ResultSetFormatter.out（System.out、results、query1）;

私は出力エリアからこのテーブルを取って、jframe.howを使ってテキストエリアに表示する必要があります。私はそれを達成できますか？出力エリアからデータを取得する方法を教えてください。

Answer 1

あなたはあなたの目標をラウンドで達成しようとしていると思います。私が正しく理解していれば、ResultSetをJTableに出力しようとしています。

java2s

/* 
Java Swing, 2nd Edition 
By Marc Loy, Robert Eckstein, Dave Wood, James Elliott, Brian Cole 
ISBN: 0-596-00408-7 
Publisher: O'Reilly 
*/ 
// DatabaseTest.java 
//Let's try to make one of these databases work with a JTable for ouptut. 
// 

import java.awt.BorderLayout; 
import java.awt.GridLayout; 
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 javax.swing.JButton; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JPanel; 
import javax.swing.JScrollPane; 
import javax.swing.JTable; 
import javax.swing.JTextField; 
import javax.swing.table.AbstractTableModel; 

public class DatabaseTest extends JFrame { 

    JTextField hostField; 

    JTextField queryField; 

    QueryTableModel qtm; 

    public DatabaseTest() { 
    super("Database Test Frame"); 
    setDefaultCloseOperation(EXIT_ON_CLOSE); 
    setSize(350, 200); 

    qtm = new QueryTableModel(); 
    JTable table = new JTable(qtm); 
    JScrollPane scrollpane = new JScrollPane(table); 
    JPanel p1 = new JPanel(); 
    p1.setLayout(new GridLayout(3, 2)); 
    p1.add(new JLabel("Enter the Host URL: ")); 
    p1.add(hostField = new JTextField()); 
    p1.add(new JLabel("Enter your query: ")); 
    p1.add(queryField = new JTextField()); 
    p1.add(new JLabel("Click here to send: ")); 

    JButton jb = new JButton("Search"); 
    jb.addActionListener(new ActionListener() { 
     public void actionPerformed(ActionEvent e) { 
     qtm.setHostURL(hostField.getText().trim()); 
     qtm.setQuery(queryField.getText().trim()); 
     } 
    }); 
    p1.add(jb); 
    getContentPane().add(p1, BorderLayout.NORTH); 
    getContentPane().add(scrollpane, BorderLayout.CENTER); 
    } 

    public static void main(String args[]) { 
    DatabaseTest tt = new DatabaseTest(); 
    tt.setVisible(true); 
    } 
} 

//QueryTableModel.java 
//A basic implementation of the TableModel interface that fills out a Vector of 
//String[] structures from a query's result set. 
// 

class QueryTableModel extends AbstractTableModel { 
    Vector cache; // will hold String[] objects . . . 

    int colCount; 

    String[] headers; 

    Connection db; 

    Statement statement; 

    String currentURL; 

    public QueryTableModel() { 
    cache = new Vector(); 
    new gsl.sql.driv.Driver(); 
    } 

    public String getColumnName(int i) { 
    return headers[i]; 
    } 

    public int getColumnCount() { 
    return colCount; 
    } 

    public int getRowCount() { 
    return cache.size(); 
    } 

    public Object getValueAt(int row, int col) { 
    return ((String[]) cache.elementAt(row))[col]; 
    } 

    public void setHostURL(String url) { 
    if (url.equals(currentURL)) { 
     // same database, we can leave the current connection open 
     return; 
    } 
    // Oops . . . new connection required 
    closeDB(); 
    initDB(url); 
    currentURL = url; 
    } 

    // All the real work happens here; in a real application, 
    // we'd probably perform the query in a separate thread. 
    public void setQuery(String q) { 
    cache = new Vector(); 
    try { 
     // Execute the query and store the result set and its metadata 
     ResultSet rs = statement.executeQuery(q); 
     ResultSetMetaData meta = rs.getMetaData(); 
     colCount = meta.getColumnCount(); 

     // Now we must rebuild the headers array with the new column names 
     headers = new String[colCount]; 
     for (int h = 1; h <= colCount; h++) { 
     headers[h - 1] = meta.getColumnName(h); 
     } 

     // and file the cache with the records from our query. This would 
     // not be 
     // practical if we were expecting a few million records in response 
     // to our 
     // query, but we aren't, so we can do this. 
     while (rs.next()) { 
     String[] record = new String[colCount]; 
     for (int i = 0; i < colCount; i++) { 
      record[i] = rs.getString(i + 1); 
     } 
     cache.addElement(record); 
     } 
     fireTableChanged(null); // notify everyone that we have a new table. 
    } catch (Exception e) { 
     cache = new Vector(); // blank it out and keep going. 
     e.printStackTrace(); 
    } 
    } 

    public void initDB(String url) { 
    try { 
     db = DriverManager.getConnection(url); 
     statement = db.createStatement(); 
    } catch (Exception e) { 
     System.out.println("Could not initialize the database."); 
     e.printStackTrace(); 
    } 
    } 

    public void closeDB() { 
    try { 
     if (statement != null) { 
     statement.close(); 
     } 
     if (db != null) { 
     db.close(); 
     } 
    } catch (Exception e) { 
     System.out.println("Could not close the current connection."); 
     e.printStackTrace(); 
    } 
    } 
} 

のこの例の礼儀を参照してください。