Java 如何将JTextField中的数据保存到mysql数据库中?
当我尝试使用s1和s2更新数据库时,出现了一个错误。不确定这是否是问题所在,但您的stat.executeQuery。。。声明是错误的,应该是:Java 如何将JTextField中的数据保存到mysql数据库中?,java,swing,jdbc,awt,Java,Swing,Jdbc,Awt,当我尝试使用s1和s2更新数据库时,出现了一个错误。不确定这是否是问题所在,但您的stat.executeQuery。。。声明是错误的,应该是: import java.awt.Panel; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.Statement; import javax.swing.JButton; import
import java.awt.Panel;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
import com.mysql.jdbc.Connection;
public class one {
JFrame frame = new JFrame("ghar hisab");
JButton b = new JButton("save");
Panel p = new Panel();
JTextField f = new JTextField(20);
JTextField f1 = new JTextField(20);
JLabel l = new JLabel("Enter the first name");
JLabel l1 = new JLabel("Enter the first name");
String s1,s2;
String ppl;
int people;
void display() throws Exception{
p.add(l);
p.add(f);
p.add(l1);
p.add(f1);
p.add(b);
frame.setSize(400,400);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(p);
s1=f.getText();
s2=f1.getText();
Class.forName("com.mysql.jdbc.Driver");
Connection con = (Connection) DriverManager.getConnection("jdbc:mysql://localhost:3306/people","root","desire");
Statement stat = con.createStatement();
// String s3= "insert into name values s1 + s2";
// stat.executeUpdate(s3);
stat.executeQuery("insert into name (first,last) values('"s1"','"s2"')");
// ResultSet rs= stat.executeQuery("insert into name (first,last) values("arun","yadav"));
//while(rs.next()){
// System.out.println(rs.getString(1)+" "+rs.getString(2));
// }
}
}
要使用+运算符压缩带有变量的字符串。将此代码复制并粘贴到项目中,这是100%的工作 数据插入方法:
stat.executeQuery("insert into name (first,last) values('"+s1+"','"+s2+"')");
然后使用按钮调用该方法:
public void insert()
{
try {
// connection string
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection con = DriverManager
.getConnection("jdbc:mysql://localhost:3306/Project?user=root&password=root");
Statement st = con.createStatement();
st.executeUpdate("insert into Register VALUES('"
+ tf1.getText() + "','" + tf2.getText() + "','"
+ tf3.getText() + "','" + cb1.getSelectedItem()
+ "','" + tf4.getText() + "','" + tf5.getText()
+ "','" + tf6.getText() + "','" + tf7.getText()
+ "','" + tf8.getText() + "','" + tf9.getText()
+ "'," + "'" + tf10.getText() + "','"
+ tf11.getText() + "','" + tf12.getText() + "','"
+ tf13.getText() + "','" + tf14.getText() + "',"
+ "'" + tf15.getText() + "','" +tf16.getText()
+ "','" + tf17.getText() + "','" + tf18.getText()
+ "'," + "'" + tf19.getText() + "','"
+ p1.getText() + "','" + p2.getText() + "')");
JOptionPane.showConfirmDialog(null, "Your Data Has been Inserted",
"Result", JOptionPane.DEFAULT_OPTION,
JOptionPane.PLAIN_MESSAGE);
st.close();
con.close();
}
catch (Exception e1)
{
System.out.println("Exception:" + e1);
}
}
这与你的问题无关,只是更改面板p=新面板;到JPanel p=新JPanel;,请不要把AWT和SwingConsider混为一谈,要考虑接受/支持有用的答案。阅读以下内容:另请参见和,例如。
b1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
insert();
}
});