public class StringLearn1 {    public static void main(String[] args){        //请使用StringBuilder构造一个INSERT语句：                String[] fields = { "name", "position", "salary" };                String table = "employee";                String insert = buildInsertSql(table, fields);                System.out.println(insert);                String s = "INSERT INTO employee (name, position, salary) VALUES (?, ?, ?)";                System.out.println(s.equals(insert) ? "测试成功" : "测试失败");    }    static String buildInsertSql(String table,String[] fields){        String Scentens = "INSERT INTO %s (%s) VALUES (?, ?, ?)";        return String.format(Scentens, table, String.join(", ", fields));    }}