Table is not created in java-mySQL

Question

I used mySQL workbench to create a database named testdb. Then I connect to it by Database>Connect to Database. Then I write some code in java (eclipse) to

1. Get connection to database
2. Create a table in the database.

The output of code shows that the connection and create table is done.

But When I return to mySQL, I don't see any table in the database. Can anyone help me about why table isn't created?

package database;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;

public class main {

    public static void main(String[] args) throws Exception {
        // TODO Auto-generated method stub
        getConnection();
        createTable();
    }

    public static void createTable() throws Exception {
        try {
            Connection con = getConnection();
            PreparedStatement create = con.prepareStatement("CREATE TABLE IF NOT EXISTS tablename(id int NOT NULL AUTO_INCREMENT, first varchar(255), last varchar(255), PRIMARY KEY(id)");
            create.executeUpdate();
        }catch(Exception e) {System.out.println(e);}
        finally {
            System.out.println("Function complete.");
            };

    }

    public static Connection getConnection() throws Exception{

        try {
            String driver = "com.mysql.jdbc.Driver";
            String url = "jdbc:mysql://localhost:3306/testdb";
            String username = "root";
            String password = "00000";
            Class.forName(driver);
            Connection conn = DriverManager.getConnection(url, username, password);
            System.out.println("Connected");
            return conn;
        } catch(Exception e) {System.out.println(e);}

        return null;    
        }


}

Here is the output:

Connected

Connected

java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1

Function complete.

Answer 1

您的sql语句中缺少括号) ，正确的是

 "CREATE TABLE IF NOT EXISTS tablename(id int NOT NULL AUTO_INCREMENT, first varchar(255), last varchar(255), PRIMARY KEY(id))"