hh的mm正则表达式匹配:mm:字符串中的ss [英] Java Regular Expression Matching for hh:mm:ss in String
问题描述
我正在解析一个文件,它有基于时间的条目。格式如下:
I am parsing a file and it has time based entries in it. format is like:
00:02:10-XYZ:Count=10
00:04:50-LMK:Count=3
这里我想要的是从字符串行中提取时间值
Here what I want is to extract the time value from string line
我搜索过很多链接但找不到我想要的东西,最终我写了这段代码。
I have searched many links and couldn't find out the thing what I want, eventually I have written this code.
Pattern pattern = Pattern.compile("((?i)[0-9]{1,2}:??[0-9]{0,2}:??[0-9]{0,2})"); //(?i)[0-9]{1,2}:??[0-9]{0,2}:??[0-9]{0,2} //\\d{1,2}:\\d{1,2}:\\d{1,2}
Matcher matcher;
List<String> listMatches;
下面是我应用逻辑的循环
Below is the loop where I apply logic
for(int x = 0; x < file_content.size(); x++)
{
matcher= pattern.matcher(file_content.get(x));
listMatches = new ArrayList<String>();
while(matcher.find())
{
listMatches.add(matcher.group(1));
break;
}
}
我希望matcher.find()给出如果它在第一次迭代中返回[00:02:10],在第二次迭代中返回[00:04:50]。
I want when "matcher.find()" gives true it returns me [00:02:10] in first iteration and [00:04:50] in 2nd iterations.
推荐答案
看起来像一个不必要的复杂模式....为什么不只是(如果你正在逐行处理):
Seems like an unnecessarily complicated pattern.... why not just (if you are doing line-by-line processing):
"^(\\d\\d:\\d\\d:\\d\\d)"
如果您正在进行多行处理,您将需要使用:
If you are doing multi-line processing you will want to use:
"(?m)^(\\d\\d:\\d\\d:\\d\\d)"
以下是一些示例代码和输出:
Here's some example code and output:
public static void main(String[] args) {
final Pattern pattern = Pattern.compile("(?m)^(\\d\\d:\\d\\d:\\d\\d)");
final Matcher matcher= pattern.matcher("00:02:10-XYZ:Count=10\n00:04:50-LMK:Count=3");
while(matcher.find())
{
System.out.printf("[%s]\n", matcher.group(1));
}
}
输出
[00:02:10]
[00:04:50]
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