Admin: 1 версия

2010-06-01T06:34:52Z

1 версия

в 18:01, 31 мая 2010

2010-05-31T18:01:44Z

Новая страница

== Database Browser ==



<source lang="java">
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Vector;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableModel;
public class DatabaseBrowser extends JFrame {
protected Connection connection;
protected JComboBox catalogBox;
protected JComboBox schemaBox;
protected JComboBox tableBox;
protected JTable table = new JTable();
public static void main(String[] args) throws Exception {
new sun.jdbc.odbc.JdbcOdbcDriver();
DatabaseBrowser db = new DatabaseBrowser();
}
public DatabaseBrowser() throws Exception {
ConnectionDialog cd = new ConnectionDialog(this);
connection = cd.getConnection();
Container pane = getContentPane();
pane.add(getSelectionPanel(), BorderLayout.NORTH);
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
refreshTable();
pane.add(new JScrollPane(table), BorderLayout.CENTER);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(600, 450);
setVisible(true);
}
protected JPanel getSelectionPanel() {
JPanel panel = new JPanel();
panel.add(new JLabel("Catalog"));
panel.add(new JLabel("Schema"));
panel.add(new JLabel("Table"));
catalogBox = new JComboBox();
populateCatalogBox();
panel.add(catalogBox);
schemaBox = new JComboBox();
populateSchemaBox();
panel.add(schemaBox);
tableBox = new JComboBox();
populateTableBox();
panel.add(tableBox);
catalogBox.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent event) {
String newCatalog = (String) (catalogBox.getSelectedItem());
try {
connection.setCatalog(newCatalog);
} catch (Exception e) {
}
populateSchemaBox();
populateTableBox();
refreshTable();
}
});
schemaBox.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent event) {
populateTableBox();
refreshTable();
}
});
tableBox.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent event) {
refreshTable();
}
});
return panel;
}
protected void populateCatalogBox() {
try {
DatabaseMetaData dmd = connection.getMetaData();
ResultSet rset = dmd.getCatalogs();
Vector values = new Vector();
while (rset.next()) {
values.addElement(rset.getString(1));
}
rset.close();
catalogBox.setModel(new DefaultComboBoxModel(values));
catalogBox.setSelectedItem(connection.getCatalog());
catalogBox.setEnabled(values.size() > 0);
} catch (Exception e) {
catalogBox.setEnabled(false);
}
}
protected void populateSchemaBox() {
try {
DatabaseMetaData dmd = connection.getMetaData();
ResultSet rset = dmd.getSchemas();
Vector values = new Vector();
while (rset.next()) {
values.addElement(rset.getString(1));
}
rset.close();
schemaBox.setModel(new DefaultComboBoxModel(values));
schemaBox.setEnabled(values.size() > 0);
} catch (Exception e) {
schemaBox.setEnabled(false);
}
}
protected void populateTableBox() {
try {
String[] types = { "TABLE" };
String catalog = connection.getCatalog();
String schema = (String) (schemaBox.getSelectedItem());
DatabaseMetaData dmd = connection.getMetaData();
ResultSet rset = dmd.getTables(catalog, schema, null, types);
Vector values = new Vector();
while (rset.next()) {
values.addElement(rset.getString(3));
}
rset.close();
tableBox.setModel(new DefaultComboBoxModel(values));
tableBox.setEnabled(values.size() > 0);
} catch (Exception e) {
tableBox.setEnabled(false);
}
}
protected void refreshTable() {
String catalog = (catalogBox.isEnabled() ? catalogBox.getSelectedItem().toString() : null);
String schema = (schemaBox.isEnabled() ? schemaBox.getSelectedItem().toString() : null);
String tableName = (String) tableBox.getSelectedItem();
if (tableName == null) {
table.setModel(new DefaultTableModel());
return;
}
String selectTable = (schema == null ? "" : schema + ".") + tableName;
if (selectTable.indexOf(" ") > 0) {
selectTable = "\"" + selectTable + "\"";
}
try {
Statement stmt = connection.createStatement();
ResultSet rset = stmt.executeQuery("SELECT * FROM " + selectTable);
table.setModel(new ResultSetTableModel(rset));
} catch (Exception e) {
}
}

}
class ConnectionDialog extends JDialog {
protected JTextField useridField;
protected JTextField passwordField;
protected JTextField urlField;
protected boolean canceled;
protected Connection connect;
public ConnectionDialog(JFrame f) {
super(f, "Connect To Database", true);
buildDialogLayout();
setSize(300, 200);
}
public Connection getConnection() {
setVisible(true);
return connect;
}
protected void buildDialogLayout() {
Container pane = getContentPane();
pane.add(new JLabel("Userid:"));
pane.add(new JLabel("Password:"));
pane.add(new JLabel("URL:"));
useridField = new JTextField(10);
pane.add(useridField);
passwordField = new JTextField(10);
pane.add(passwordField);
urlField = new JTextField(15);
pane.add(urlField);
pane.add(getButtonPanel());
}
protected JPanel getButtonPanel() {
JPanel panel = new JPanel();
JButton btn = new JButton("Ok");
btn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
onDialogOk();
}
});
panel.add(btn);
return panel;
}
protected void onDialogOk() {
if (attemptConnection()) {
setVisible(false);
}
}
protected boolean attemptConnection() {
try {
connect = DriverManager.getConnection(urlField.getText(), useridField.getText(),
passwordField.getText());
return true;
} catch (Exception e) {
JOptionPane.showMessageDialog(this, "Error connecting to " + "database: " + e.getMessage());
}
return false;
}
}
class ResultSetTableModel extends AbstractTableModel {
protected Vector columnHeaders;
protected Vector tableData;
public ResultSetTableModel(ResultSet rset) throws SQLException {
Vector rowData;
ResultSetMetaData rsmd = rset.getMetaData();
int count = rsmd.getColumnCount();
columnHeaders = new Vector(count);
tableData = new Vector();
for (int i = 1; i <= count; i++) {
columnHeaders.addElement(rsmd.getColumnName(i));
}
while (rset.next()) {
rowData = new Vector(count);
for (int i = 1; i <= count; i++) {
rowData.addElement(rset.getObject(i));
}
tableData.addElement(rowData);
}
}
public int getColumnCount() {
return columnHeaders.size();
}
public int getRowCount() {
return tableData.size();
}
public Object getValueAt(int row, int column) {
Vector rowData = (Vector) (tableData.elementAt(row));
return rowData.elementAt(column);
}
public boolean isCellEditable(int row, int column) {
return false;
}
public String getColumnName(int column) {
return (String) (columnHeaders.elementAt(column));
}
}
</source>

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Admin: 1 версия

в 18:01, 31 мая 2010