Maven package open a file (as a *File*) inside a jar package

I need to open a file which is inside a maven jar package. It a model configuration for a framework I use and a constructor of a library class requires to pass a object of type File. I can get a path to a configuration file using class loader without any problems. But -- unfortunately -- File can not read a file inside jar. So I get java.io.FileNotFoundException. Now I looking for a solution for this problem. My plan is to decompress the model configuration file and place it in a temporary directory. However, before star开发者_开发问答ting coding, I would like to learn if there is any other solution for such a problem like mine.

UPDATE: I need to read a file in runtime.

If you're doing it from a maven build, unpack the jar resource to a file using

• dependency:unpack-dependencies (if the jar is one of the project's maven dependenies)

  <plugin>
   <groupId>org.apache.maven.plugins</groupId>
   <artifactId>maven-dependency-plugin</artifactId>
   <executions>
     <execution>
      <id>unpack-dependencies</id>
      <phase>generate-resources</phase>
      <goals>
        <goal>unpack-dependencies</goal>
      </goals>
      <configuration>
        <includeGroupIds>the.groupId</includeGroupIds>
        <includeArtifactIds>the.artifactId</includeArtifactIds>
        <includes>**/path/to/your/resource.txt</includes>
        <outputDirectory>where/do/you/want/it</outputDirectory>
      </configuration>
    </execution>
   </executions>
  </plugin>
  

or use

• dependency:unpack (if the jar is no dependency, but still available as a maven artifact)

  <plugin>
   <groupId>org.apache.maven.plugins</groupId>
   <artifactId>maven-dependency-plugin</artifactId>
   <executions>
     <execution>
       <id>unpack</id>
       <phase>generate-resources</phase>
       <goals>
         <goal>unpack</goal>
       </goals>
       <configuration>
         <artifactItems>
           <artifactItem>
             <groupId>the.groupid</groupId>
             <artifactId>the.artifactid</artifactId>
             <version>the.version</version>
             <type>jar</type>
             <outputDirectory>where/do/you/want/it</outputDirectory>
             <includes>**/path/to/your/resource.txt</includes>
           </artifactItem>
         </artifactItems>
       </configuration>
     </execution>
   </executions>
  </plugin>
  

I think you should use JarInputStream, traversing through JAR entries one by one, until you find what you need. Then just read() content of the found JarEntry.