正则表达式如何匹配一段字符中的特定句子

2014-05-20 10:21:06 875 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

前端正则表达式：精准匹配特定字符在前端开发中，经常需要对用户输入的文本、URL、表单数据等进行验证和处理。正则表达式是一种强大的工具，它可以帮助开发者精准地匹配、查找、替换特定的字符模式。本文的目的就是详细介绍如何在前端使用正则表达式来精准匹配特定字符，范围涵盖正则表达式的基本概念、核心算法、实际应用案例以及相关的工具和资源。本文将按照以下结构进行组织：首先介绍正则表达式的核心概念与联系，包括原理和架构；接着阐述核心算法原理和具体操作步骤，并使用Python代码进行详细说明；然后引入数学模型和公式来帮助理解正则表达式的匹配过程；阅读详情

E/Trace (17215): error opening trace file: No such file or directory (2)
W/dalvikvm(17215): Refusing to reopen boot DEX '/system/framework/hwframework.jar'
E/dalvikvm(17215): GC_CONCURRENT freed 150K, 7% free 8511K/9095K, paused 11ms+12ms, total 41ms
E/Trace (17232): error opening trace file: No such file or directory (2)
W/dalvikvm(17232): Refusing to reopen boot DEX '/system/framework/hwframework.jar'
E/dalvikvm(17232): GC_CONCURRENT freed 162K, 7% free 8532K/9095K, paused 2ms+2ms, total 18ms
W/System.err(17232): Invalid int: ""
E/Trace (17580): error opening trace file: No such file or directory (2)
W/dalvikvm(17580): Refusing to reopen boot DEX '/system/framework/hwframework.jar'
E/dalvikvm(17580): GC_CONCURRENT freed 175K, 7% free 8519K/9095K, paused 2ms+1ms, total 18ms
I/TestRunner(17580): started: TST_05_GroupEPP

这是一段日志，E 是错误日志 W是警告日志， I是所有日志。问题是怎么用正则选出错误日志呀（E开头的）。

正则不太熟啊，

...全文

【学习python】re 正则表达式匹配特定词性的conll，提取句子主干（主谓宾） ------------------找寻特定内容-------------------------------&gt;&gt;&gt; # -*- coding: utf-8 -*-&gt;&gt;&gt; import re&gt;&gt;&gt; pattern = re.compile(u'[白蓝绿黄][A-Z][A-Z0-9]{5}')&gt;&gt;&gt; match = patter... 阅读详情

昵称不能为空噢噢噢噢

C# 111,128 成员 642,537 内容

+ 关注 + 加入社区

切换为时间正序

郑州高新区WPF小王子 2014-05-20

打赏
举报

可以使用File读取你的日志。



 string path =@"D:\ceshi.txt";

           string[] fileArray = File.ReadAllLines(path, Encoding.UTF8);

           string[] errroLines = fileArray.Where(p => p.IndexOf("E/") == 0).ToArray();

q107770540 2014-05-20

打赏
举报

foreach(Match m in Regex.Matches(log,"(?m)^E/.+"))
{
   //m.Value
}

q107770540 2014-05-20

打赏
举报

结果：

E/Trace   (17215): error opening trace file: No such file or directory (2)
E/dalvikvm(17215): GC_CONCURRENT freed 150K, 7% free 8511K/9095K, paused 11ms+12ms, total 41ms
E/Trace   (17232): error opening trace file: No such file or directory (2)
E/dalvikvm(17232): GC_CONCURRENT freed 162K, 7% free 8532K/9095K, paused 2ms+2ms, total 18ms
E/Trace   (17580): error opening trace file: No such file or directory (2)
E/dalvikvm(17580): GC_CONCURRENT freed 175K, 7% free 8519K/9095K, paused 2ms+1ms, total 18ms

q107770540 2014-05-20

打赏
举报

foreach(Match m in Regex.Matches(log,"E/.+"))
{
   //m.Value
}

youzelin 2014-05-20

打赏
举报


string errorMessages = 
@"
    E/Trace   (17215): A1 error opening trace file: No such file or directory (2)
    W/dalvikvm(17215): Refusing to reopen boot DEX '/system/framework/hwframework.jar'
    E/dalvikvm(17215): A2 GC_CONCURRENT freed 150K, 7% free 8511K/9095K, paused 11ms+12ms, total 41ms
    E/Trace   (17232): A3 error opening trace file: No such file or directory (2)
    W/dalvikvm(17232): Refusing to reopen boot DEX '/system/framework/hwframework.jar'
    E/dalvikvm(17232): A4 GC_CONCURRENT freed 162K, 7% free 8532K/9095K, paused 2ms+2ms, total 18ms
    W/System.err(17232): Invalid int: ""
    E/Trace   (17580): A5 error opening trace file: No such file or directory (2)
    W/dalvikvm(17580): Refusing to reopen boot DEX '/system/framework/hwframework.jar'
    E/dalvikvm(17580): A6 GC_CONCURRENT freed 175K, 7% free 8519K/9095K, paused 2ms+1ms, total 18ms
    I/TestRunner(17580): started: TST_05_GroupEPP
";
Regex regex = new Regex(@"(?:E/\w+\s*\(\d+\):\s*)(.*)\r\n", RegexOptions.IgnoreCase | RegexOptions.Multiline);
foreach (Match errorMessage in regex.Matches(errorMessages))
{
    Console.WriteLine("\"{0}\"", errorMessage.Groups[1].Value);
}

正则表达式如何匹配一段字符中的特定句子

相关推荐