如何使用java正则表达式删除以某个字符串开头的所有行？
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How to remove all lines that start with a certain string using java regex?
提问by Azamat Bagatov
There is a text of about 1000 characters.
有大约 1000 个字符的文本。
String text = "bla bla..................
.........................
.........................
file.....................
.........................
.........................
file.....................
.........................
Some lines start with a word "file". How can I remove ALLsuch lines? Here is what I tried
有些行以单词“file”开头。如何删除所有这些行？这是我尝试过的
text = text.replaceAll("file.*?//n", "");
采纳答案by Ibrahim Najjar
You could try the following instead:
您可以尝试以下方法：
text = text.replaceAll("(?m)^file.*", "");
(?m): Turns multi-line mode on, so that the start-of-line^anchor matches the start of each line.^: matches the start-of-line.file: Matches the literalfilesequence..*matches everything to the end of line.
(?m)：打开多行模式，以便行首^锚点与每行的开头相匹配。^: 匹配行首。file: 匹配文字file序列。.*匹配到行尾的所有内容。
So this look for any line that has the word fileat the start, then matches the entire line and replaces it with the empty string.
所以这会查找任何以单词file开头的行，然后匹配整行并将其替换为空字符串。
