英文:
file not found exception in java with maven
问题
我正在尝试从目录中读取日志文件：src/main/resources/example.log
文件已经存在，但是会抛出文件未找到的异常。
以下是我的代码：
public class Main {
public static void main(String[] args) throws FileNotFoundException {
// logfilepath = "src\\main\\resources\\example.log";
Input input = new CommandLineInput();
Textfilehandler textfilehandler = new Textfilehandler();
Log logvariables = new Logvariables();
Firstreadinglog firstreadinglog = new Firstreadinglog(textfilehandler, logvariables);
Logfilehandler logfilehandler = null;
Morereadinglog morereadinglog = new Morereadinglog(textfilehandler, logvariables);
LogAnalyzerApp app = new LogAnalyzerApp(textfilehandler, firstreadinglog, morereadinglog, input);
app.show();
}
}
错误信息如下：
java.io.FileNotFoundException: /example.log (文件或目录不存在) 异常出现在线程 "main" 内
java.lang.IndexOutOfBoundsException: 索引 -1 超出长度范围 0 at
java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64)
at
java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70)
at
java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:248)
at java.base/java.util.Objects.checkIndex(Objects.java:373) at
java.base/java.util.ArrayList.get(ArrayList.java:427) at
kln.se.ass2.logfile.Morereadinglog.getcurrentlogstates(Morereadinglog.java:50)
at kln.se.ass2.LogAnalyzerApp.show(LogAnalyzerApp.java:35) at
kln.se.ass2.Main.main(Main.java:29)
我按照以下方式输入了文件路径：
src\main\resources\example.log
英文:
I am trying to read the log file from the directory: src/main/resources/example.log
The file is already there but it throws file not found exception.
Here is my code:
public class Main {
public static void main(String[] args) throws FileNotFoundException {
//logfilepath = "src\\main\\resources\\example.log";
Input input=new CommandLineInput();
Textfilehandler textfilehandler = new Textfilehandler();
Log logvariables=new Logvariables();
Firstreadinglog firstreadinglog = new Firstreadinglog(textfilehandler,logvariables);
Logfilehandler logfilehandler = null;
Morereadinglog morereadinglog = new Morereadinglog(textfilehandler,logvariables);
LogAnalyzerApp app=new LogAnalyzerApp(textfilehandler,firstreadinglog,morereadinglog,input);
app.show();
}
}
And the error message is:
> java.io.FileNotFoundException: /example.log (No such file or
> directory) Exception in thread "main"
> java.lang.IndexOutOfBoundsException: Index -1 out of bounds for length
> 0 at
> java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64)
> at
> java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70)
> at
> java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:248)
> at java.base/java.util.Objects.checkIndex(Objects.java:373) at
> java.base/java.util.ArrayList.get(ArrayList.java:427) at
> kln.se.ass2.logfile.Morereadinglog.getcurrentlogstates(Morereadinglog.java:50)
> at kln.se.ass2.LogAnalyzerApp.show(LogAnalyzerApp.java:35) at
> kln.se.ass2.Main.main(Main.java:29)
I entered the file path as follows:
src\main\resources\example.log
答案1
得分: 0
你可以尝试使用Maven的资源(resource)功能，通过使用文件的完整路径，它会自动设置当前工作目录，然后你可以这样使用：
File resourcesDirectory = new File("src/main/resources/example.log");
String logfilepath = resourcesDirectory.getAbsolutePath();
英文:
You can try to use the full path of the file using resource of Maven that automatically sets the current working directory, then you can just use:
File resourcesDirectory = new File("src/main/resources/example.log");
String logfilepath = resourcesDirectory.getAbsolutePath();
答案2
得分: 0
问题是我使用Linux操作系统。我像在Windows中一样输入带有反斜杠的目录。现在我明白了。谢谢。
英文:
Problem is that I use Linux OS. I entered the directory with backslashes as in Windows. Now I figured it out. Thank you.
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