java.util.Scanner未到文件结尾，hasNext跟hasNextLine()返回false

Question

java.util.Scanner未到文件结尾，hasNext跟hasNextLine()返回false,使用默认分割符。import java.io.*;
public class Scans
{
    public static void main(String[] args)throws FileNotFoundException{
        
        
        PrintWriter pw=new PrintWriter(new File("ttttt.txt"));
        Scanner  sc=new Scanner(new File(Scans.class.getResource("").getPath()+"rt1.txt"));
        //sc.useDelimiter("\\r*\\n");
        
        while(sc.hasNext()){
            pw.print(sc.nextLine()+"$$$$$$$");
            System.out.println(sc.hasNext());
            if(sc.hasNext())pw.print("\n");
        }
        pw.flush();
    }
}
//下面是r1.txt
/**
Extraction Rules (HTML/Web)
Target Code
Type
Page Encoding
Query Method
Login Method
Portal Address :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0001&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0002&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0004&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0005&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0006&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0007&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0008&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0009&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0010&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0011&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0011&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0012&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0013&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0014&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0015&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0016&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0017&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0018&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0019&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0022&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0023&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0023&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0024&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0025&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0026&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0027&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0029&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0030&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0031&dbcode=CLKM&json=&t=%/~ :/%http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0003&dbcode=CLKM&json=&t=%/~
List Regex :/%(?#title)(?i)href="([^"]+)"[^>]*>[^<>]+</a></p>%/~ :/%(?i)setFrame\('([^']+)'\)%/~ :/%[post](?#post)(?#title)(?#accept)(?i)^(?=[\w\W]*?(?:<form[^>]*action="|<PARENT_URL>:\s*)(?<action>[^"<>\s]*)["<])(?=[\w\W]*?name="drpField"[^>]*VALUE="(?<drpField>[^"]*)"|[\W\w])(?=[\w\W]*?name="__EVENTVALIDATION"[^>]*VALUE="(?<__EVENTVALIDATION>[^"]*)"|[\W\w])(?=[\w\W]*?name="__VIEWSTATE"[^>]*VALUE="(?<__VIEWSTATE>[^"]*)"|[\W\w])[\w\W]*href="javascript:KnsPager.go\((?<__CALLBACKPARAM>\d+),'(?<__CALLBACKID>[^']+)'\)" >Next</a>%/~
Data Regex :/%(?#title)(?i)href="([^"]+)"[^>]*>\s*[^<>]+</a>\s*</td%/~
Sublink Regex
Metadata Regex title:/%(?i)href="[^"]+"[^>]*>\s*([^<>]+)</a>\s*</td[^>]*<%/~ author:/%(?i)\【?Author\s*in\s*Chinese\】?(?:<(?!/p)[^>]*>|\s)*<a[^>]*>([^<>]*?)</a>(\；)(?:(?:<(?!/p)[^>]*>|\s)*<a[^>]*>([^<>]*?)</a>(\；))?(?:(?:<(?!/p)[^>]*>|\s)*<a[^>]*>([^<>]*?)</a>)?(?:(?:<(?!/p)[^>]*>|\s)*<a[^>]*>([^<>]*?)</a>(\；))?(?:(?:<(?!/p)[^>]*>|\s)*<a[^>]*>([^<>]*?)</a>)?%/~ datepublished:/%(?i)Author\s*information[\w\W]+?(\d{4})%/~ Publisher:/%(?i)href="[^"]+"[^>]*>([^<>]+)</a></p>%/~

Result:0 Status:Running Display top:

List URL -- http://eng.oversea.cnki.net/law/navi/CLKMissue.aspx?dbcode=CLKM&dbPrefix=CLKT&pykm=GGUDU
List URL -- http://eng.oversea.cnki.net/law/navi/CLKMissue.aspx?dbcode=CLKM&dbPrefix=CLKT&pykm=GGZSU
List URL -- size = 2
start...
access : http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0001&dbcode=CLKM&json=&t=
List URL -- http://eng.oversea.cnki.net/law/navi/CLKMissue.aspx?dbcode=CLKM&dbPrefix=CLKT&pykm=GANHU
List URL -- http://eng.oversea.cnki.net/law/navi/CLKMissue.aspx?dbcode=CLKM&dbPrefix=CLKT&pykm=GAHCC
List URL -- size = 2
access : http://eng.oversea.cnki.net/law/navi/clkb_ifmlist.aspx?navitype=area&navi=0002&dbcode=CLKM&json=&t=
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loadimg
*/

Answer 1

 while(sc.hasNextLine()){
            pw.print(sc.nextLine()+"$$$$$$$");        }试试

Answer 2

sc.hasNextLine()跟hasNext()是一样的结果，在第8行的位置就返回false了。后面的都没读取

Answer 3

确实奇怪
那你用BufferedReader & FileReader 吧

Answer 4

谢谢，我的目的不是要读取这个文件，我是想搞清楚sacnner这个类。这个地方不能理解，也许是个非常2b 的错误，不过还是求高手指点

Answer 5

试了一下２楼的方法，能全部输出。jdk1.6
末尾最好加上pw.close()；