如何将输出写入控制台和文件？

Question

我必须输出方法 sayHello() 两次。输出应该写入控制台，并且一次写入文件。我写了一些代码，但我没有成功。

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;

public class Utility {

    public static void main(String[] args){
        try(OutputStream src = new FileOutputStream("C:/Users/baum/Documents/TestText.txt");
        InputStream dest = new FileInputStream("C:/Users/baum/Documents/TestText.txt")){
        sayHello(src, dest);
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
}

    public static void sayHello(OutputStream src, InputStream dest)throws IOException{

        String t = "Hello World!!!";
        OutputStreamWriter out = new OutputStreamWriter(src);
        InputStreamReader in = new InputStreamReader(dest);

        out.write(t.toCharArray());

        out.flush();
        in.close();
    }
}

Answer 1

try {
    for (String line : Files.readAllLines(Paths.get("C:\path\to\text.txt"))) {
        System.out.println(line);
    }
} catch (IOException e) {
    e.printStackTrace();
}

这也许是更好的方法

如何将输出写入控制台和文件？

How to write the output to console and file?

java

io

fileinputstream

fileoutputstream