相关疑难解决方法(0)

I'm looking for a way to replace a string in a file without reading the whole file into memory. Normally I would use a Reader and Writer, i.e. something like the following:

public static void replace(String oldstring, String newstring, File in, File out)
    throws IOException {

    BufferedReader reader = new BufferedReader(new FileReader(in));
    PrintWriter writer = new PrintWriter(new FileWriter(out));
    String line = null;
    while ((line = reader.readLine()) != null)
        writer.println(line.replaceAll(oldstring,newstring));

    // I'm aware of the potential for resource leaks here. Proper …