我的Java正则表达式没有';我不能正常工作
我编写了一个正则表达式,如下所示,它使用从字符串中提取日期:我的Java正则表达式没有';我不能正常工作,java,regex,Java,Regex,我编写了一个正则表达式,如下所示,它使用从字符串中提取日期: (Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sunday)(\*){0,2}\s+\d{1,2}\s+(January|February|March|April|May|June|July|August|September|October|November|December)\s+\d{4} 在转换为java正则表达式之前,我在这里测试了它 结果看起来没问题,符合我的要求 “
(Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sunday)(\*){0,2}\s+\d{1,2}\s+(January|February|March|April|May|June|July|August|September|October|November|December)\s+\d{4}
在转换为java正则表达式之前,我在这里测试了它
结果看起来没问题,符合我的要求
“el”对象是字符串类型的arraylist:
holiday: New Year's Day Wednesday 1 January 2014
holiday: Chinese New Year Friday 31 January 2014 Saturday 1 February 2014
holiday: Good Friday Friday 18 April 2014
holiday: Labour Day Thursday 1 May 2014
holiday: Vesak Day Tuesday 13 May 2014
holiday: Hari Raya Puasa Monday 28 July 2014
holiday: National Day Saturday 9 August 2014
holiday: Hari Raya Haji Sunday* 5 October 2014
holiday: Deepavali Thursday** 23 October 2014
holiday: Christmas Day Thursday 25 December 2014
问题是java中的一些日期缺失,一些匹配,我在这里也测试了,同样的错误
更新:
Found: Wednesday 1 January 2014
holiday: New Year's Day Wednesday 1 January 2014
Found: Saturday 1 February 2014
holiday: Chinese New Year Friday 31 January 2014 Saturday 1 February 2014
holiday: Good Friday Friday 18 April 2014
Found: Thursday 1 May 2014
holiday: Labour Day Thursday 1 May 2014
holiday: Vesak Day Tuesday 13 May 2014
holiday: Hari Raya Puasa Monday 28 July 2014
holiday: National Day Saturday 9 August 2014
Found: Sunday* 5 October 2014
holiday: Hari Raya Haji Sunday* 5 October 2014
holiday: Deepavali Thursday** 23 October 2014
Found: Thursday 25 December 2014
holiday: Christmas Day Thursday 25 December 2014
holiday:
holiday:
我的代码的完整版本:
import java.io.IOException;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
public class Tester {
/**
* @param args
* @throws IOException
*/
public static void main(String[] args) throws IOException {
updateSingaporeHolidayCalendar();
}
public static void updateSingaporeHolidayCalendar() throws IOException{
String url = "http://www.mom.gov.sg/employment-practices/leave-and-holidays/Pages/public-holidays-2014.aspx";
Document document = Jsoup.connect(url).get();
Elements holidays = document.select("#contentarea table tr");
// System.out.println("12312312");
//System.out.println("web page context: " + question);
List<String> el = new ArrayList<String>();
for(int i = 2; i < holidays.size() + 1; i++){
if((i&1) == 1) continue;
Elements threeGroup = holidays.get(i-2).getElementsByTag("td");
int j = 2;
for(Element e : threeGroup){
if(j-- != 0) continue;
j = 2;
el.add(e.text());
}
}
Pattern pattern = Pattern.compile("(Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sunday)(\\*){0,2}\\s+\\d{1,2}\\s+(January|February|March|April|May|June|July|August|September|October|November|December)\\s+\\d{4}");
//out put
for(int k = 0; k < el.size(); k++){
Matcher matcher = pattern.matcher(el.get(k));
// Check all occurrences
while (matcher.find()) {
//System.out.print("Start index: " + matcher.start());
//System.out.print(" End index: " + matcher.end());
System.out.println(" Found: " + matcher.group());
}
System.out.println("holiday: " + el.get(k));
}
}
}
已解决:
holiday: New Year's Day Wednesday 1 January 2014
holiday: Chinese New Year Friday 31 January 2014 Saturday 1 February 2014
holiday: Good Friday Friday 18 April 2014
holiday: Labour Day Thursday 1 May 2014
holiday: Vesak Day Tuesday 13 May 2014
holiday: Hari Raya Puasa Monday 28 July 2014
holiday: National Day Saturday 9 August 2014
holiday: Hari Raya Haji Sunday* 5 October 2014
holiday: Deepavali Thursday** 23 October 2014
holiday: Christmas Day Thursday 25 December 2014
正如@Pshemo所说,“您从站点获取的数据也不包含可以用HTML编写的空格,显然它不属于\s类。要解决此问题,请将每个\s替换为[\s\u00A0]以包含此字符(使用Unicode标识符编写)。”
因此,将表达式更改为:
Pattern pattern = Pattern
.compile("(Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sunday)(\\*){0,2}[\\s\u00A0]+\\d{1,2}[\\s\u00A0]+(January|February|March|April|May|June|July|August|September|October|November|December)[\\s\u00A0]+\\d{4}");
解决了这个问题。我可以肯定地说,您将错过最后两个,因为您的迭代会短停两个元素,即更改:
k < el.size() - 2
您的正则表达式看起来正常。for(int k=0;k被限制为el.size()-2
尝试删除-2以循环浏览列表中的所有元素您从站点获得的数据也包含无中断空间
,可以用HTML编写为 显然它不属于\\s
类。要解决此问题,请将每个\\s
替换为[\\s\u00A0]
以包含此字符(使用Unicode标识符写入)
所以你的正则表达式看起来像
Pattern pattern = Pattern
.compile("(Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sunday)(\\*){0,2}[\\s\u00A0]+\\d{1,2}[\\s\u00A0]+(January|February|March|April|May|June|July|August|September|October|November|December)[\\s\u00A0]+\\d{4}");
对不起,你们能不能再多谈谈你们面临的问题?为了我。。。没有最后两行,但由于您使用了size-2,我认为这是正确的。它看起来也不错。您的程序打印到控制台的输出是什么?@JasonC您尝试了我最少的代码吗?它有效吗?不,我没有JSoup。我删除最后2个的原因是我不需要它们,我认为这不是问题所在,我用java测试了“假日:耶稣受难日2014年4月18日星期五”、“假日:卫塞节2014年5月13日星期二”、“假日:2014年7月28日星期一”、“假日:2014年8月9日国庆日星期六”,“假日:迪帕瓦利星期四**2014年10月23日“我们错过了。其他的都是匹配的。@user1837485我刚刚测试了你的代码,它似乎工作得很好。请看这里。@Pshemo您的代码可以工作,等一下,我将粘贴所有完整的代码,实际上我从一个网站获取了字符串列表。@Pshemo有没有办法将外部lib导入IDEONE?@Pshemo我将代码粘贴在那里,但是JSoup.jar丢失了,+1非常有趣,使用regex非中断空格不是一个“空格”@波希米亚人:是的,这很有趣,但它很有意义,因为它不用于分隔新行标记、制表符等单词,而是用于分隔两个单词的空格,所以它是一种“字母/字符”,而不是空格:)
Pattern pattern = Pattern
.compile("(Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sunday)(\\*){0,2}[\\s\u00A0]+\\d{1,2}[\\s\u00A0]+(January|February|March|April|May|June|July|August|September|October|November|December)[\\s\u00A0]+\\d{4}");