java怎样联接数据库

Question

package jsp;
import java.sql.*; // JDBC package
public class sql_data {
String url = "jdbc:inetdae:192.168.2.70?sql7=true"; // use your hostname and port number 
String login = "sa"; // use your login here
String password =""; // use your password here
public Connection connection = null;
public Statement st = null;
public ResultSet rs = null;
public sql_data(){
　try {
　　Class.forName("com.inet.tds.TdsDriver").newInstance(); 
　　DriverManager.setLoginTimeout(10);
　} catch(Exception e) {
　e.printStackTrace();
}
}public void sqlclose() {
　try { 
　　st.close();
　　connection.close();
　}
　catch(SQLException ex) { 
　　System.err.println("sqlclose: " + ex.getMessage());
　}
}public ResultSet executeQuery(String sql) { 
　try {
　　connection = DriverManager.getConnection(url,login,password);
　　connection.setCatalog( "register");
　　st = connection.createStatement();
　　rs = st.executeQuery(sql);
　} 
　catch(SQLException ex) { 
　　System.err.println("aq.executeQuery: " + ex.getMessage());
　}
　return rs;
}
} 
 

Answer 1

楼上的方法可行！！
还有这个
import java.io.*;
import java.util.*;
import java.sql.*;
import java.lang.*;public class DBConnect {
  private String jdbcDriver=null;
  private String jdbcURL=null;
  private String userName=null;
  private String password=null;   public DBConnect() {
jdbcDriver="sun.jdbc.odbc.JdbcOdbcDriver";
jdbcURL="jdbc:odbc:shihong";
userName="system ";
password="manager";
  }
  public Connection getConnection(){
Connection connection=null;
try{
  Class.forName(jdbcDriver);
  connection=DriverManager.getConnection(jdbcURL,userName,password);
}catch(Exception e){
  System.out.println(e);
}
return connection;
  }
}

Answer 2

用JBuilder的DataBase远程管理，DBView

Answer 3

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.sql.*;
public class JavaDb 
{
  private boolean packFrame = false;  public JavaDb() 
  {
      Frame2 frame = new Frame2();
      frame.validate();    
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    Dimension frameSize = frame.getSize();
    if (frameSize.height > screenSize.height) {
      frameSize.height = screenSize.height;
    }
    if (frameSize.width > screenSize.width) {
      frameSize.width = screenSize.width;
    }
    frame.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2);
    frame.setVisible(true);
  }  
  public static void main(String[] args) 
  {    new JavaDb();
  }
}
class Frame2 extends JFrame {
        private JPanel contentPane;
        private BorderLayout borderLayout1 = new BorderLayout();
        private JScrollPane jScrollPane1 = new JScrollPane();
        private JTextArea jTextArea1 = new JTextArea();
        private JButton jButton1 = new JButton();        //Construct the frame
        public Frame2() {
                enableEvents(AWTEvent.WINDOW_EVENT_MASK);
                try {
                        jbInit();
                }
                catch(Exception e) {
                        e.printStackTrace();
                }
                System.out.println("Tested with SQL Server 7.0, Northwind database");
                System.out.println("if it works, it is written by masterz, otherwise I don't know who write it");
        }
        //Component initialization
        private void jbInit() throws Exception  {
                
                contentPane = (JPanel) this.getContentPane();
                contentPane.setLayout(borderLayout1);
                this.setSize(new Dimension(400, 300));
                this.setTitle("How to connect SQL server database");
                jTextArea1.setText("jTextArea1");
                jButton1.setText("jButton1");
                jButton1.addActionListener(new java.awt.event.ActionListener() {
                        public void actionPerformed(ActionEvent e) {
                                jButton1_actionPerformed(e);
                        }
                });
                contentPane.add(jScrollPane1, BorderLayout.CENTER);
                contentPane.add(jButton1, BorderLayout.NORTH);
                jScrollPane1.getViewport().add(jTextArea1, null);
        }
        //Overridden so we can exit when window is closed
        protected void processWindowEvent(WindowEvent e) {
                super.processWindowEvent(e);
                if (e.getID() == WindowEvent.WINDOW_CLOSING) {
                        System.exit(0);
                }
        } void processConn(Connection con,String fieldname) throws SQLException
{
        Statement st = con.createStatement();
        ResultSet res = st.executeQuery("select * from employees");
        String line = "";
        while (res.next())
          line = line + res.getString(fieldname)+"\n";
        jTextArea1.setText(line);
              con.close();
}
        void jButton1_actionPerformed(ActionEvent e2) {
                try
                {                        processConn(getConn(),"notes");
                }
                catch(Exception e)
                {
                        e.printStackTrace();
                }        }
        Connection getConn() throws SQLException,ClassNotFoundException
        {
                Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
                DriverManager.setLoginTimeout(10);
                
                Connection connection = DriverManager.getConnection("jdbc:odbc:Driver={SQL Server};Server=192.168.0.2;Database=Northwind","sa","sa");
//                Connection connection = DriverManager.getConnection("jdbc:odbc:Driver={SQL Server};Server=cell;Database=Northwind","sa","sa");
                connection.setCatalog( "northwind");
                return connection;
        }
}