Advanced Concepts in File Reading with Spring Boot

How to Read Files in Spring Boot: A Guide to Secure and Efficient Methods

Now that we’ve covered the basics, let’s dive deeper into advanced techniques and considerations for file reading in Spring Boot. This includes handling large files, asynchronous file processing, and securing sensitive data.

1. Handling Large Files

For large files, reading them entirely into memory can cause performance bottlenecks or even application crashes. Instead, you can process files in a memory-efficient way using streams.

Using Buffered Streams

Buffered streams read data in chunks, reducing memory consumption.

import java.io.BufferedReader;
import java.io.FileReader;

public class LargeFileReader {
    public void readLargeFile(String filePath) throws Exception {
        try (BufferedReader reader = new BufferedReader(new FileReader(filePath))) {
            String line;
            while ((line = reader.readLine()) != null) {
                processLine(line);
            }
        }
    }
    private void processLine(String line) {
        // Process each…