10.29

学习了数据的更新操作
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;

public class JavaMySQLUpdateExample {
public static void main(String[] args) {
try {
Class.forName("com.mysql.cj.jdbc.Driver");
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/mydatabase", "username", "password");
String sql = "UPDATE mytable SET column2 =? WHERE column1 =?";
PreparedStatement ps = con.prepareStatement(sql);
ps.setString(1, "newValue");
ps.setString(2, "searchValue");
ps.executeUpdate();
con.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}