我需要从日志中收集信息,不幸的是这些信息没有放在一起,但之间还有其他条目。
例如,我想知道谁是 child 的 parent 。日志看起来像
[Mar-27-2019 20:17:32]*** Started pregnancy for Bella Goth with Vladimir Goth.
[Mar-27-2019 20:17:32]*** Started adoption of Ninon Caron for Jacqueline Leduc and Don Lothario.
[Mar-27-2019 20:17:32]*** Started adoption of Emile François for Marion Boyer and Paolo Rocca.
[Mar-27-2019 20:17:32]Started 4 pregnancies
[Mar-27-2019 20:17:32]*** Started pet pregnancy for Josie with Bartholomiaou A. Bittlebun Senior.
[Mar-27-2019 20:17:32]*** Started pet pregnancy for Blue with Tempête Romeo.
[Mar-27-2019 20:17:32]Started 2 pet pregnancies
[Mar-27-2019 20:17:32]Checking for random marriage
(...)
[Mar-28-2019 09:54:54]Nancy Landgraab delivered 1 baby.
[Mar-28-2019 09:54:54] Female delivered:
[Mar-28-2019 09:54:54] * Zélie Landgraab
[Mar-28-2019 09:54:54]Nancy Landgraab delivered 1 baby.
[Mar-28-2019 09:54:54]Bella Goth delivered 1 baby.
[Mar-28-2019 09:54:54] Female delivered:
[Mar-28-2019 09:54:54] * Jessica Goth
[Mar-28-2019 09:54:54]Bella Goth delivered 1 baby.
所以我需要一起收集的是:
[Mar-27-2019 20:17:32]*** Started pregnancy for Bella Goth with Vladimir Goth.
[Mar-28-2019 09:54:54]Bella Goth delivered 1 baby.
[Mar-28-2019 09:54:54] Female delivered:
[Mar-28-2019 09:54:54] * Jessica Goth
[Mar-28-2019 09:54:54]Bella Goth delivered 1 baby.
在Java中有什么简单的方法可以做到这一点吗?
最佳答案
例如,我们可以设计一些表达式来查看哪些单词可能位于所需的行中,例如:
^(?=.*(?:delivered|\*\*\*\s+Started\s+pregnancy)).*$
然后我们会收集这些行。
演示
该表达式在 this demo 的右上角面板中进行了解释如果您想探索/简化/修改它。
测试
import java.util.regex.Matcher;
import java.util.regex.Pattern;
final String regex = "^(?=.*(?:delivered|\\*\\*\\*\\s+Started\\s+pregnancy)).*$";
final String string = "[Mar-27-2019 20:17:32]*** Started pregnancy for Bella Goth with Vladimir Goth.\n"
+ "[Mar-27-2019 20:17:32]*** Started adoption of Ninon Caron for Jacqueline Leduc and Don Lothario.\n"
+ "[Mar-27-2019 20:17:32]*** Started adoption of Emile François for Marion Boyer and Paolo Rocca.\n"
+ "[Mar-27-2019 20:17:32]Started 4 pregnancies\n"
+ "[Mar-27-2019 20:17:32]*** Started pet pregnancy for Josie with Bartholomiaou A. Bittlebun Senior.\n"
+ "[Mar-27-2019 20:17:32]*** Started pet pregnancy for Blue with Tempête Romeo.\n"
+ "[Mar-27-2019 20:17:32]Started 2 pet pregnancies\n"
+ "[Mar-27-2019 20:17:32]Checking for random marriage\n"
+ "(...)\n"
+ "[Mar-28-2019 09:54:54]Nancy Landgraab delivered 1 baby.\n"
+ "[Mar-28-2019 09:54:54] Female delivered:\n"
+ "[Mar-28-2019 09:54:54] * Zélie Landgraab\n"
+ "[Mar-28-2019 09:54:54]Nancy Landgraab delivered 1 baby.\n"
+ "[Mar-28-2019 09:54:54]Bella Goth delivered 1 baby.\n"
+ "[Mar-28-2019 09:54:54] Female delivered:\n"
+ "[Mar-28-2019 09:54:54] * Jessica Goth\n"
+ "[Mar-28-2019 09:54:54]Bella Goth delivered 1 baby.";
final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
final Matcher matcher = pattern.matcher(string);
while (matcher.find()) {
System.out.println("Full match: " + matcher.group(0));
for (int i = 1; i <= matcher.groupCount(); i++) {
System.out.println("Group " + i + ": " + matcher.group(i));
}
}
正则表达式电路
jex.im可视化正则表达式:
关于java - 如何使用正则表达式收集日志的不同部分,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/57078524/