button.addMouseListener(new MouseAdapter(){
    @Override public void mouseEntered(MouseEvent e){
         button.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
    }
    @Override public mouseExited(MouseEvent e){
         button.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
    }
});
button.addActionListener(new ActionListener(){
    @Override public void actionPerformed(ActionEvent e){
        // 使用 java.awt.Desktop 的browse 方法打开浏览器浏览此连接
    }
});