Java's PreparedStatement question mark for reference

admin · Posted on 11/20/2014 1:14:01 PM

Java source code: [mw_shl_code=java,true]import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Scanner;

public class PreparedStatement {

/**
   * @param args
   * IT Forum:www.itsvse.com
   */
public static void main(String[] args) {
// TODO Auto-generated method stub
Connection conn=null;
java.sql.PreparedStatement pstmt =null;
ResultSet rs=null;
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
conn=DriverManager.getConnection("jdbc:sqlserver://localhost:1433; database=sqlDB; ", "sa", "123");
Scanner sc=new Scanner(System.in);
System.out.println("Please enter your registered username:");
int id=sc.nextInt();
System.out.println("Please enter password:");
String pwd=sc.next();
String sql="insert into userinfo values (?,?)";
pstmt =conn.prepareStatement(sql);
pstmt.setInt(1, id);
pstmt.setString(2, pwd);
pstmt.executeUpdate();
System.out.println("Registration Successful!") );

} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
try {
if(rs!=null){rs.close(); }
if(pstmt!=null){pstmt.close(); }
if(conn!=null){conn.close(); }
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

}

}
[/mw_shl_code]

SQL Server database code:
[mw_shl_code=sql,true]create database sqlDB
go
use sqlDB
go

create table userinfo(
id int primary key,
pwd varchar(10)
)
go
select * from userinfo[/mw_shl_code]

[Source] Java's PreparedStatement question mark for reference

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