import java.util.Vector; import java.sql.*; import javax.swing.table.AbstractTableModel; import javax.swing.event.TableModelEvent;public class JDBCAdapter extends AbstractTableModel { Connection connection; Statement statement; ResultSet resultSet; String[] columnNames = {}; Vector rows = new Vector(); ResultSetMetaData metaData; public JDBCAdapter(String url, String driverName, String user, String passwd) { try { Class.forName(driverName); System.out.println("Opening db connection"); connection = DriverManager.getConnection(url, user, passwd); statement = connection.createStatement(); } catch (ClassNotFoundException ex) { System.err.println("Cannot find the database driver classes."); System.err.println(ex); } catch (SQLException ex) { System.err.println("Cannot connect to this database."); System.err.println(ex); } } public void executeQuery(String query) { if (connection == null || statement == null) { System.err.println("There is no database to execute the query."); return; } try { resultSet = statement.executeQuery(query); metaData = resultSet.getMetaData(); int numberOfColumns = metaData.getColumnCount(); columnNames = new String[numberOfColumns]; // Get the column names and cache them. // Then we can close the connection. for(int column = 0; column < numberOfColumns; column++) { columnNames[column] = metaData.getColumnLabel(column+1); } // Get all rows. rows = new Vector(); while (resultSet.next()) { Vector newRow = new Vector(); for (int i = 1; i <= getColumnCount(); i++) { newRow.addElement(resultSet.getObject(i)); } rows.addElement(newRow); } // close(); Need to copy the metaData, bug in jdbc:odbc driver. fireTableChanged(null); // Tell the listeners a new table has arrived. } catch (SQLException ex) { System.err.println(ex); } } public void close() throws SQLException { System.out.println("Closing db connection"); resultSet.close(); statement.close(); connection.close(); } protected void finalize() throws Throwable { close(); super.finalize(); } ////////////////////////////////////////////////////////////////////////// // // Implementation of the TableModel Interface // ////////////////////////////////////////////////////////////////////////// // MetaData public String getColumnName(int column) { if (columnNames[column] != null) { return columnNames[column]; } else { return ""; } } public Class getColumnClass(int column) { int type; try { type = metaData.getColumnType(column+1); } catch (SQLException e) { return super.getColumnClass(column); } switch(type) { case Types.CHAR: case Types.VARCHAR: case Types.LONGVARCHAR: return String.class; case Types.BIT: return Boolean.class; case Types.TINYINT: case Types.SMALLINT: case Types.INTEGER: return Integer.class; case Types.BIGINT: return Long.class; case Types.FLOAT: case Types.DOUBLE: return Double.class; case Types.DATE: return java.sql.Date.class; default: return Object.class; } } public boolean isCellEditable(int row, int column) { try { return metaData.isWritable(column+1); } catch (SQLException e) { return false; } } public int getColumnCount() { return columnNames.length; } // Data methods public int getRowCount() { return rows.size(); } public Object getValueAt(int aRow, int aColumn) { Vector row = (Vector)rows.elementAt(aRow); return row.elementAt(aColumn); } public String dbRepresentation(int column, Object value) { int type; if (value == null) { return "null"; } try { type = metaData.getColumnType(column+1); } catch (SQLException e) { return value.toString(); } switch(type) { case Types.INTEGER: case Types.DOUBLE: case Types.FLOAT: return value.toString(); case Types.BIT: return ((Boolean)value).booleanValue() ? "1" : "0"; case Types.DATE: return value.toString(); // This will need some conversion. default: return "\""+value.toString()+"\""; } } public void setValueAt(Object value, int row, int column) { try { String tableName = metaData.getTableName(column+1); // Some of the drivers seem buggy, tableName should not be null. if (tableName == null) { System.out.println("Table name returned null."); } String columnName = getColumnName(column); String query = "update "+tableName+ " set "+columnName+" = "+dbRepresentation(column, value)+ " where "; // We don't have a model of the schema so we don't know the // primary keys or which columns to lock on. To demonstrate // that editing is possible, we'll just lock on everything. for(int col = 0; col<getColumnCount(); col++) { String colName = getColumnName(col); if (colName.equals("")) { continue; } if (col != 0) { query = query + " and "; } query = query + colName +" = "+ dbRepresentation(col, getValueAt(row, col)); } System.out.println(query); System.out.println("Not sending update to database"); // statement.executeQuery(query); } catch (SQLException e) { // e.printStackTrace(); System.err.println("Update failed"); } Vector dataRow = (Vector)rows.elementAt(row); dataRow.setElementAt(value, column); } }
import java.sql.*;
import javax.swing.table.AbstractTableModel;
import javax.swing.event.TableModelEvent;public class JDBCAdapter extends AbstractTableModel {
Connection connection;
Statement statement;
ResultSet resultSet;
String[] columnNames = {};
Vector rows = new Vector();
ResultSetMetaData metaData; public JDBCAdapter(String url, String driverName,
String user, String passwd) {
try {
Class.forName(driverName);
System.out.println("Opening db connection"); connection = DriverManager.getConnection(url, user, passwd);
statement = connection.createStatement();
}
catch (ClassNotFoundException ex) {
System.err.println("Cannot find the database driver classes.");
System.err.println(ex);
}
catch (SQLException ex) {
System.err.println("Cannot connect to this database.");
System.err.println(ex);
}
} public void executeQuery(String query) {
if (connection == null || statement == null) {
System.err.println("There is no database to execute the query.");
return;
}
try {
resultSet = statement.executeQuery(query);
metaData = resultSet.getMetaData(); int numberOfColumns = metaData.getColumnCount();
columnNames = new String[numberOfColumns];
// Get the column names and cache them.
// Then we can close the connection.
for(int column = 0; column < numberOfColumns; column++) {
columnNames[column] = metaData.getColumnLabel(column+1);
} // Get all rows.
rows = new Vector();
while (resultSet.next()) {
Vector newRow = new Vector();
for (int i = 1; i <= getColumnCount(); i++) {
newRow.addElement(resultSet.getObject(i));
}
rows.addElement(newRow);
}
// close(); Need to copy the metaData, bug in jdbc:odbc driver.
fireTableChanged(null); // Tell the listeners a new table has arrived.
}
catch (SQLException ex) {
System.err.println(ex);
}
} public void close() throws SQLException {
System.out.println("Closing db connection");
resultSet.close();
statement.close();
connection.close();
} protected void finalize() throws Throwable {
close();
super.finalize();
} //////////////////////////////////////////////////////////////////////////
//
// Implementation of the TableModel Interface
//
////////////////////////////////////////////////////////////////////////// // MetaData public String getColumnName(int column) {
if (columnNames[column] != null) {
return columnNames[column];
} else {
return "";
}
} public Class getColumnClass(int column) {
int type;
try {
type = metaData.getColumnType(column+1);
}
catch (SQLException e) {
return super.getColumnClass(column);
} switch(type) {
case Types.CHAR:
case Types.VARCHAR:
case Types.LONGVARCHAR:
return String.class; case Types.BIT:
return Boolean.class; case Types.TINYINT:
case Types.SMALLINT:
case Types.INTEGER:
return Integer.class; case Types.BIGINT:
return Long.class; case Types.FLOAT:
case Types.DOUBLE:
return Double.class; case Types.DATE:
return java.sql.Date.class; default:
return Object.class;
}
} public boolean isCellEditable(int row, int column) {
try {
return metaData.isWritable(column+1);
}
catch (SQLException e) {
return false;
}
} public int getColumnCount() {
return columnNames.length;
} // Data methods public int getRowCount() {
return rows.size();
} public Object getValueAt(int aRow, int aColumn) {
Vector row = (Vector)rows.elementAt(aRow);
return row.elementAt(aColumn);
} public String dbRepresentation(int column, Object value) {
int type; if (value == null) {
return "null";
} try {
type = metaData.getColumnType(column+1);
}
catch (SQLException e) {
return value.toString();
} switch(type) {
case Types.INTEGER:
case Types.DOUBLE:
case Types.FLOAT:
return value.toString();
case Types.BIT:
return ((Boolean)value).booleanValue() ? "1" : "0";
case Types.DATE:
return value.toString(); // This will need some conversion.
default:
return "\""+value.toString()+"\"";
} } public void setValueAt(Object value, int row, int column) {
try {
String tableName = metaData.getTableName(column+1);
// Some of the drivers seem buggy, tableName should not be null.
if (tableName == null) {
System.out.println("Table name returned null.");
}
String columnName = getColumnName(column);
String query =
"update "+tableName+
" set "+columnName+" = "+dbRepresentation(column, value)+
" where ";
// We don't have a model of the schema so we don't know the
// primary keys or which columns to lock on. To demonstrate
// that editing is possible, we'll just lock on everything.
for(int col = 0; col<getColumnCount(); col++) {
String colName = getColumnName(col);
if (colName.equals("")) {
continue;
}
if (col != 0) {
query = query + " and ";
}
query = query + colName +" = "+
dbRepresentation(col, getValueAt(row, col));
}
System.out.println(query);
System.out.println("Not sending update to database");
// statement.executeQuery(query);
}
catch (SQLException e) {
// e.printStackTrace();
System.err.println("Update failed");
}
Vector dataRow = (Vector)rows.elementAt(row);
dataRow.setElementAt(value, column); }
}
我说一下编程实现的思想把
用JTable +Vector来实现
Vector来放你要显示的字段植
用JTable实现表格显示