我是一个初学者,我试图找到一种在MySQL数据库列中插入新条目时自动创建jbutton的方法。该按钮的文本将从数据库中的条目中拉出。我已经弄清楚了如何从表中提取信息以用作jbutton文本,但是,我觉得必须有一种更简单的方法来做到这一点。关于这两个问题有什么想法吗?我在下面包括了我的代码片段。谢谢!
public class JuniorSkills extends javax.swing.JFrame {
/**
* Creates new form JuniorSkills
*/
public JuniorSkills() throws ClassNotFoundException {
initComponents();
Connection conn = null;
Statement statement = null;
ResultSet rs = null;
try {
Class.forName("com.mysql.jdbc.Driver");
conn=DriverManager.getConnection("jdbc:mysql://localhost:3306/simlab","root","password");
System.out.println("Connected to database");
statement = conn.createStatement();
rs = statement.executeQuery("SELECT * FROM skill_table WHERE class='junior'");
int count = 0;
while(rs.next())
{
count++;
String gotit = rs.getString(1);
//System.out.println(gotit);
if(count==1)
{
Skill1.setText(rs.getString(1));
}
else if(count==2)
{
skill2.setText(rs.getString(1));
}
else if(count==3)
{
skill3.setText(rs.getString(1));
}
else if(count==4)
{
skill4.setText(rs.getString(1));
}
else if(count==5)
{
Skill5.setText(rs.getString(1));
}
else if(count==6)
{
skill6.setText(rs.getString(1));
}
else if(count==7)
{
Skill7.setText(rs.getString(1));
}
else if(count==8)
{
Skill8.setText(rs.getString(1));
}
else if(count==9)
{
Skill9.setText(rs.getString(1));
}
else if(count==10)
{
Skill10.setText(rs.getString(1));
}
}
} catch (SQLException ex) {
Logger.getLogger(JuniorSkills.class.getName()).log(Level.SEVERE, null, ex);
}
}
最佳答案
如果只有固定数量的行,则可以创建JButton
的数组
private JButton[] myFixedListOfButtons;
//...//
myFixedListOfButtons = new JButton[10];
//...//
while(rs.next())
{
String gotit = rs.getString(1);
if (count < myFixedListOfButtons.length)
{
myFixedListOfButtons[count].setText(gotit);
}
count++;
}
或者,如果行数可变,则只需根据需要创建按钮
removeAll(); // remove all the old buttons...
while(rs.next())
{
String gotit = rs.getString(1);
JButton btn = new JButton(gotit);
add(btn);
}
关于java - 使用MySQL数据库条目创建Jbutton,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/15512824/