在Eclipse和Java中执行期间的不同相对文件路径

Question

I have implemented a Java class that handles files of .txt-Format by relative paths. It works all well during execution in Eclipse. But if I'm executing the (unchanged) compiled file in the Java JRE outside of Eclipse, I'm getting a java.io.FileNotFoundException.

I implemented new File(".").getCanonicalPath() and found the source of my problem:

Executed in Eclipse I get returned: C:\\Users\\xy\\git\\Project\\Project

Executed in Java 8 JRE I get returned: C:\\Users\\xy\\git\\Project\\Project\\bin

I thought of a workaround, but handling two different code versions for development and deployment seems an unnecessary source of errors to me.

So my question is how to fix the problem. I would prefer a hint how to reconfigure Eclipse.

Thanks in advance Threx

Answer 1

There are many ways:

1. do not put your text file in the /bin, point to another more static path
2. load the file into classpath
3. use combination of System.getProperties("user.dir") and if-else statement
4. use maven, ref: Maven add properties file to jar file

Answer 2

The solution lies in adapting the configuration of Eclipse.

Under Run | Run Configurations… | slide Arguments there is the entry "Working directory" . By default it is set to ${workspace_loc: ProjectName}. After changing it to ${workspace_loc:ProjectName/bin} the java.io.FileNotFoundException-warnings are gone and everything works as intended.

Now Eclipse and the JRE outside of Eclipse work with the same path and no more redundant code with workarounds is needed.