解决方案
以下示例使用 PrepareStatement 方法创建 PreparedStatement。它还使用 PreparedStatement 的 setInt 和 setString 方法来设置 PreparedStatement 的参数。
import java.sql.*;
public class jdbcConn {
public static void main(String[] args) throws Exception {
Class.forName("org.apache.derby.jdbc.ClientDriver");
Connection con = DriverManager.getConnection (
"jdbc:derby://localhost:1527/testDb","name","pass");
PreparedStatement updateemp = con.prepareStatement(
"insert into emp values(?,?,?)");
updateemp.setInt(1,23);
updateemp.setString(2,"Roshan");
updateemp.setString(3, "CEO");
updateemp.executeUpdate();
Statement stmt = con.createStatement();
String query = "select * from emp";
ResultSet rs = stmt.executeQuery(query);
System.out.println("Id Name Job");
while (rs.next()) {
int id = rs.getInt("id");
String name = rs.getString("name");
String job = rs.getString("job");
System.out.println(id + " " + name+" "+job);
}
}
}