Properties props = PropertiesUtil.load(resource);

// File operations with proper resource handling
try (InputStream input = ResourceUtil.getResourceAsStream("data.txt")) {
    String content = InputStreamUtil.getUTF8String(input);
}

// Resource traversal for processing multiple files
ResourceTraversalUtil.forEach("META-INF", (resource, is) -> {

								<group>${packaging.fess.group}</group>
							</mapper>
						</data>
						<!-- Add configuration files -->
						<data>
							<type>files</type>
							<paths>
								<path>${project.basedir}/src/main/assemblies/files/tomcat_config.properties</path>
								<path>${project.basedir}/src/main/assemblies/files/logging.properties</path>
							</paths>
							<dst>${packaging.fess.conf.dir}</dst>
							<mapper>

    /**
     * Creates a temporary file.
     *
     * @param prefix The prefix for the file name.
     * @param suffix The suffix for the file name.
     * @return The created temporary file.
     * @throws IORuntimeException if the file cannot be created.
     */
    public File createTempFile(final String prefix, final String suffix) {
        try {
            final File file = File.createTempFile(prefix, suffix);

        }
      }
    ```

### Posting a File ([.kt][PostFileKotlin], [.java][PostFileJava])

It's easy to use a file as a request body.

=== ":material-language-kotlin: Kotlin"
    ```kotlin
      private val client = OkHttpClient()

      fun run() {
        val file = File("README.md")

        val request = Request.Builder()

            packages, like RangeTest. The reason for this is that GWT doesn't distinguish between
            .java files in c.g.c.collect.Collect, a module that the c.g.c.base test module inherits,
            and .java files in c.g.c.collect.testModule, one that it doesn't[*]. Consequently,
            c.g.c.base.testModule transitively pulls in .java files from both modules while reading

/*
 * Copyright (C) 2015 Square, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

                logger.info("Flushed config files.");
            } else {
                logger.warn("Failed to flush config files.");
            }
        } catch (final Exception e) {
            logger.warn("Failed to flush config files.", e);
        }
    }

    /**
     * Flushes configuration files to the search engine and executes a callback.
     *

/*
 * Copyright (C) 2018 Square, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

/*
 * Copyright (C) 2018 Square, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

/*
 * Copyright (C) 2018 Square, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,