java - Reading files from Resources folder of a Nested jars of a spring boot Jar - Stack Overflow

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I have a use case where I need to refer to configuration files from various nested JARs within a Spring Boot fat JAR

 public void searchConfFiles() throws Exception {
    PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();

    // Search for all .conf files in the nested JARs
    Resource[] resources = resolver.getResources("classpath:/BOOT-INF/lib/**/*.conf");


    System.out.println("resoucre length"+resources.length);
    for (Resource resource : resources) {
        if (resource.exists()) {
            try (InputStream inputStream = resource.getInputStream()) {
                String content = new String(inputStream.readAllBytes(), StandardCharsets.UTF_8);
                System.out.println("Found .conf file: " + resource.getURI());
                System.out.println(content);
            }
        }
    }
}

It is displaying a resource length of 0, even though the .conf files are included. The approach should work when running the application using the jar command, gradlew bootRun, or the maven command.

Does Spring provide a solution for this ?

Any other alternatives ?

I have a use case where I need to refer to configuration files from various nested JARs within a Spring Boot fat JAR

 public void searchConfFiles() throws Exception {
    PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();

    // Search for all .conf files in the nested JARs
    Resource[] resources = resolver.getResources("classpath:/BOOT-INF/lib/**/*.conf");


    System.out.println("resoucre length"+resources.length);
    for (Resource resource : resources) {
        if (resource.exists()) {
            try (InputStream inputStream = resource.getInputStream()) {
                String content = new String(inputStream.readAllBytes(), StandardCharsets.UTF_8);
                System.out.println("Found .conf file: " + resource.getURI());
                System.out.println(content);
            }
        }
    }
}

It is displaying a resource length of 0, even though the .conf files are included. The approach should work when running the application using the jar command, gradlew bootRun, or the maven command.

Does Spring provide a solution for this ?

Any other alternatives ?

• java
• spring
• spring-boot
• multi-module
• uberjar

Share Improve this question Follow asked 13 hours ago Deepu VarmaDeepu Varma 2144 bronze badges

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1 Answer 1

Sorted by: Reset to default 1

Those jars are in classpath so you can use resolver.getResources("classpath:/*.conf").

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