WriteLocal方法报错，如何解决？(标签-爬虫|关键词-代码块)

Question

问题遇到的现象和发生背景

编写爬虫类的时候，代码中的 WriteLocal、SaveData总是标红

用代码块功能插入代码，请勿粘贴截图

import cn.edu.hfut.dmic.webcollector.model.CrawlDatums;
import cn.edu.hfut.dmic.webcollector.model.Page;
import cn.edu.hfut.dmic.webcollector.plugin.ram.RamCrawler;
import org.json.*;
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.*;


public class EvaluationInfoCrawler extends RamCrawler {//评论信息爬取并存储(主类)
    static List<String> urlArr = new ArrayList<String>( );
    static String platform;
    static String model;
    static String crawlTime;
    static double price;
    static Parser infoParser;
    public EvaluationInfoCrawler(String url){
        this.addSeed(url) ;
    }
    public void visit(Page page, CrawlDatums next) {
        String doc = page.html();
        if (!doc.isEmpty()) {
            JSONObject json = new JSONObject(doc);
            json.append("price", price);
            if ((!json.optString(" comments").isEmpty()) && (!json.optJSONArray(" conments").isNull(0))) {
                WriteLocal.write(json.toString());
                infoParser.start(json.toString(), platform, model, crawlTime);
            }
        }
    }
            public static void main( String[] args) throws Exception {
                if (args.length != 3 && args.length != 4 && args.length != 6){
                    System.err.println("Usage:java -jar EvaluationCrawler.jar <skId> <model> <localPath>");
                    System.err.println("java -jar EvaluationCrawler.jar <skld> <model> <localPath> <dbSrvIP>");
                    System.err.println(" java -jar EvaluationCrawler.jar <skld> <model> <localPath> <dlbSrvIP> <dbUser> <pwd>");
                    System.exit(2);
                }
                String skId = args[0];//商品编号(商品URL的skid)
                EvaluationInfoCrawler.model = args[1];//手机型号
                String localDir = args[2];//爬取数据解析存本地位置
                File file = new File(localDir);
                if ((!file.exists()) || file.isFile()) {
                    file.mkdirs();
                }
                EvaluationInfoCrawler.platform = "京东";
                SimpleDateFormat dateFormat = new SimpleDateFormat("yyyMMddHHmmss");
                EvaluationInfoCrawler.crawlTime = dateFormat.format(new Date());
                EvaluationInfoCrawler.infoParser = new Parser();
                EvaluationInfoCrawler.price = new PriceCrawler(skId).getPrice();
                int number = new EvaluateCountCrawler(skId).getNumber();
                if (args.length == 3) {
                    SaveData.getConnection();
                } else if (args.length == 4) {//srvIP
                    SaveData.getConnection(args[3]);
                } else if (args.length == 6) {//srvIP, user, pwd
                    SaveData.getConection(args[3], args[4], args[5]);
                } else {
                    System.exit(2);
                }
                WriteLocal.setWriter(localDir + File.separator + EvaluationInfoCrawler.crawlTime + "_ json.txt");
                for (int page = 0; page <= Math.ceil(number / 10.0) - 1; page++) {//分页--深度爬取
                    String nextUrl = "http://club.jd.com/productpage/p-" + skId + "-s-O-t-3-p-" + page + ".html";
                    new EvaluationInfoCrawler(nextUrl).start();//继续爬取下一页
                }
                if (urlArr.size() > 0) {
                    for (String url : urlArr) {
                        new EvaluationInfoCrawler(url).start();
                    }
                }
                WriteLocal.close();
                SaveData.close();
                String source = EvaluationInfoCrawler.crawlTime + "\t" + skId + "\t" + Math.ceil(number / 10.0) + "\n";
                File flagFile = new File(localDir + "/SUCCESS");
                BufferedWriter bw = new BufferedWriter(new FileWriter(flagFile, true));
                bw.write(source);
                bw.flush();
                bw.close();
            }
}

Answer 1

报红是没有导入对应的包
网上的代码，可能少了这些工具类的代码，或者少了相关jar包。