package com.itranswarp.sample;

import java.util.StringJoiner;

public class Main {

    public static void main(String[] args) {

        String[] fields = { "name", "position", "salary" };

        String table = "employee";

        String select = buildSelectSql(table, fields);

        System.out.println(select);

        System.out.println("SELECT name, position, salary FROM employee".equals(select) ? "测试成功" : "测试失败");

    }

static String buildSelectSql(String table, String[] fields) {

    var s = new StringJoiner(", ","SELECT "," FROM employee");

    for (String field:fields) {s.add(field);}           

    return s.toString();

    }

}