MySQL新建表

package MySQLExercise;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;

public class ExerciseSecond {
    public static final String DBDRIVER="com.mysql.jdbc.Driver";
    public static final String DBURL="jdbc:mysql://127.0.0.1:3306/javademo";
    public static final String DBUSER="root";
    public static final String DBPASS="123";
    public static void main(String args[])throws Exception {
        Connection conn = null;
        Statement stmt = null;
        BufferedReader buff=new BufferedReader(new InputStreamReader(System.in));
        String str=null;
        StringBuffer sql=new StringBuffer();
        sql.append("create table ");

        System.out.print("Please input table name : ");
        str=buff.readLine();
        sql.append(str);
        sql.append("(");
        System.out.println("Please input  field,press Enter to end: ");
        while(true){
            System.out.print("Please input filed name : ");
            str=buff.readLine();
            if("".equals(str)) break;
            sql.append(str);
        }
        sql.append(",");
        int len=sql.length();
        sql.delete(len-1,len);
        sql.append(")");

        System.out.println(sql);

        Class.forName(DBDRIVER);
        conn= DriverManager.getConnection(DBURL,DBUSER,DBPASS);
        stmt=conn.createStatement();
        stmt.execute(sql+"");
        System.out.println("New table created.");
    }

}