public class HelloWorld {
    public static void main(String[] args) {
        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) {
        // TODO:        String s = String.join(", ",fields);
        return "INSERT INTO "+table+" ("+s+") VALUES (?, ?, ?)";
    }
}