记一次java连接远程mysql数据库

用java连接远程数据库，写一个小java gui程序，写一张小表 student（number，name，sex），可以写入数据，删除数据，查询数据

主要代码：

public class TestSqlOnFrame {  2     public static void main(String[] args) {  3         frame frameOne=new frame();  4  frameOne.main();  5  }  6 }  7 
class frame extends Frame{  9     //新建组件
    Frame frameone=new Frame("my java gui");  11     
    TextField textOne=new TextField(5);  13     TextField textTwo=new TextField(5);  14     TextField textThree=new TextField(5);  15     
    Label labelOne=new Label("number");  17     Label labelTwo=new Label("name");  18     Label labelThree=new Label("sex");  19     
    Button buttonOne=new Button("set");  21     Button buttonTwo=new Button("search");  22     Button buttonThree=new Button("delete");  23     Label labelForInformation=new Label();  24     Font fconsole=new Font("Console", 0, 20);  25 
    public void main() {  27         //组件属性
        frameone.setLayout(new GridLayout(4,3));  29         frameone.setSize(600,300);  30         frameone.setLocation(300,300);  31  frameone.setFont(fconsole);  32         //组件监听器
        frameone.addWindowListener(new HandleWidows());  34         buttonOne.addActionListener(new HandleButton());  35         buttonTwo.addActionListener(new HandleButton());  36         buttonThree.addActionListener(new HandleButton());  37         //在框架里加入组件
 frameone.add(labelOne);  39  frameone.add(labelTwo);  40  frameone.add(labelThree);  41  frameone.add(textOne);  42  frameone.add(textTwo);  43  frameone.add(textThree);  44  frameone.add(buttonOne);  45  frameone.add(buttonTwo);  46  frameone.add(buttonThree);  47  frameone.add(labelForInformation);  48         frameone.add(new Label());  49         frameone.add(new Label());  50         frameone.setVisible(true);  51         
 }  53     //内部类监听动作
    class HandleButton implements ActionListener{  55         public void actionPerformed(ActionEvent e) {  56             try {  57                 //新建驱动，注册驱动
                com.mysql.jdbc.Driver driverOne=new com.mysql.jdbc.Driver();  59  DriverManager.registerDriver(driverOne);  60                 //连接的三个参数，建立连接
                String url="JDBC:Mysql://你的数据库服务器ip地址:3306/你的数据库名";  62                 String name="你的用户名";  63                 String password="你的密码";  64                 Connection conn=DriverManager.getConnection(url,name,password);  65                 //建立sql信使：
                Statement st=(Statement) conn.createStatement();  67                 String sql="";  68                 //resultset用来接收查询
 ResultSet rs;  70                 //按钮动作，分别是insert select delete
                if (e.getSource()==buttonOne) {  72                     //add to database
                    String numberWillBeAdded=textOne.getText();  74                     sql="insert into student values("+textOne.getText()  75                         +",\'"+textTwo.getText()+"\'"
                        +",\'"+textThree.getText()  77                         +"\');";  78  System.out.println(sql);  79  st.executeUpdate(sql);  80                     labelForInformation.setText(numberWillBeAdded+" added");  81  }  82                 if (e.getSource()==buttonTwo) {  83                     //search
                    sql="select * from student where number"
                            +"="+textOne.getText()+";";  86                     rs=st.executeQuery(sql);  87  System.out.println(sql);  88                     if (rs.next() == true) {  89                         labelForInformation.setText("find it!");  90                     }else{  91                         labelForInformation.setText("fail to find it");  92  }  93                     textTwo.setText("");  94                     textThree.setText("");  95                     textTwo.setText(rs.getString("name"));  96                     textThree.setText(rs.getString("sex"));  97  }  98                 if (e.getSource()==buttonThree) {  99                     //delete
                    String numberWillBeDeteled=textOne.getText(); 101                     sql="delete from student where number="
                            +textOne.getText()+";"; 103  st.executeUpdate(sql); 104                     labelForInformation.setText(numberWillBeDeteled+" deleted"); 105  } 106             } catch (SQLException e1) { 107                 // TODO: handle exception
 } 109  } 110  } 111     class HandleWidows extends WindowAdapter{ 112          public void windowClosing(WindowEvent e) { 113              System.exit(0); 114  } 115  } 116     
}

当然，记得下好mysql的驱动然后加入build path