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root@VM-0-9-ubuntu:~/nyaHentaiCrawler/src/main/java/com/cn/main# javac nyaPictureMain.java
nyaPictureMain.java:3: error: package com.cn.util does not exist
import com.cn.util.HttpClientUtil;
^
nyaPictureMain.java:4: error: package org.apache.commons.io does not exist
import org.apache.commons.io.FileUtils;
^
nyaPictureMain.java:5: error: package org.apache.http does not exist
import org.apache.http.HttpEntity;
^
nyaPictureMain.java:6: error: package org.apache.http.client.methods does not exist
import org.apache.http.client.methods.CloseableHttpResponse;
^
nyaPictureMain.java:7: error: package org.apache.http.client.methods does not exist
import org.apache.http.client.methods.HttpGet;
^
nyaPictureMain.java:8: error: package org.apache.http.impl.client does not exist
import org.apache.http.impl.client.CloseableHttpClient;
^
nyaPictureMain.java:9: error: package org.apache.http.impl.client does not exist
import org.apache.http.impl.client.HttpClients;
^
nyaPictureMain.java:10: error: package org.jsoup does not exist
import org.jsoup.Jsoup;
^
nyaPictureMain.java:11: error: package org.jsoup.nodes does not exist
import org.jsoup.nodes.Document;
^
nyaPictureMain.java:12: error: package org.jsoup.nodes does not exist
import org.jsoup.nodes.Element;
^
nyaPictureMain.java:13: error: package org.jsoup.select does not exist
import org.jsoup.select.Elements;
^
nyaPictureMain.java:54: error: cannot find symbol
CloseableHttpClient httpClient = HttpClients.createDefault(); // 创建HttpClient实例
^
symbol: class CloseableHttpClient
location: class nyaPictureMain
nyaPictureMain.java:54: error: cannot find symbol
CloseableHttpClient httpClient = HttpClients.createDefault(); // 创建HttpClient实例
^
symbol: variable HttpClients
location: class nyaPictureMain
nyaPictureMain.java:55: error: cannot find symbol
HttpGet httpGet = new HttpGet(fileUrl+i+suffix); // 创建Httpget实例
^
symbol: class HttpGet
location: class nyaPictureMain
nyaPictureMain.java:55: error: cannot find symbol
HttpGet httpGet = new HttpGet(fileUrl+i+suffix); // 创建Httpget实例
^
symbol: class HttpGet
location: class nyaPictureMain
nyaPictureMain.java:58: error: cannot find symbol
CloseableHttpResponse response = null;
^
symbol: class CloseableHttpResponse
location: class nyaPictureMain
nyaPictureMain.java:60: error: cannot find symbol
HttpEntity entity = response.getEntity(); // 获取返回实体
^
symbol: class HttpEntity
location: class nyaPictureMain
nyaPictureMain.java:64: error: cannot find symbol
FileUtils.copyInputStreamToFile(inputStream, new File(intputFile+i+suffix));//引用org.apache.commons.io.FileUtils
^
symbol: variable FileUtils
location: class nyaPictureMain
nyaPictureMain.java:84: error: cannot find symbol
html = HttpClientUtil.getSource(url);
^
symbol: variable HttpClientUtil
location: class nyaPictureMain
nyaPictureMain.java:86: error: cannot find symbol
Document document = Jsoup.parse(html);
^
symbol: class Document
location: class nyaPictureMain
nyaPictureMain.java:86: error: cannot find symbol
Document document = Jsoup.parse(html);
^
symbol: variable Jsoup
location: class nyaPictureMain
nyaPictureMain.java:87: error: cannot find symbol
Element element = document.selectFirst("div.container").selectFirst("a");
^
symbol: class Element
location: class nyaPictureMain
nyaPictureMain.java:95: error: cannot find symbol
Elements picSum = document.select("div.thumb-container");
^
symbol: class Elements
location: class nyaPictureMain
23 errors

完全不懂java，百度查运行.java文件要用javac命令编译，结果试着编译了一下就报错。 请问大佬的脚本对javac版本有要求吗？