BufferedReader更改读取文件的内容

import java.io.*;

public class FileContentModifier {
    public static void main(String[] args) {
        try {
            // Step 1: Create File object
            File file = new File("path/to/file.txt");

            // Step 2: Create FileReader object
            FileReader fileReader = new FileReader(file);

            // Step 3: Create BufferedReader object
            BufferedReader bufferedReader = new BufferedReader(fileReader);

            // Step 4: Read file content and modify
            String line;
            StringBuilder contentBuilder = new StringBuilder();
            while ((line = bufferedReader.readLine()) != null) {
                // Modify the content here (e.g., replace specific text)
                line = line.replace("oldText", "newText");
                contentBuilder.append(line).append("\n");
            }
            bufferedReader.close();

            // Step 5: Create FileWriter object
            FileWriter fileWriter = new FileWriter(file);

            // Step 6: Write modified content to file
            fileWriter.write(contentBuilder.toString());
            fileWriter.close();
            
            System.out.println("File content modified successfully.");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}