In this example, we use Apache Commons IO to append to a file.
We need below dependency:
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.5</version>
</dependency>
Java append to file with Apache Commons IO
Let's create a sample.txt file under "src/main/resources" folder and add some content to it. Now, below program will append "Append some data" string to "sample.txt" file.
import java.io.File;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import org.apache.commons.io.FileUtils;
public class JavaAppendFileApacheCommons {
public static void main(String[] args) throws IOException {
String fileName = "src/main/resources/sample.txt";
File file = new File(fileName);
FileUtils.writeStringToFile(file, "Append some data", StandardCharsets.UTF_8, true);
}
}
We append to the file with the FileUtils.writeStringToFile() method. The last append parameter determines whether to append to a file.
Apache Commons IO
Java
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