將數據寫入Java中的外部文件

Question

我的 BufferedReader 中有數據，但我想在外部文件中打印數據。 我怎么做？

    URL url=new URL(input);
    BufferedReader br=new BufferedReader(new InputStreamReader(url.openStream()));
    String inputLine;
    while((inputLine=br.readLine())!=null)
        System.out.println(inputLine);
    br.close();

上面的代碼對我有用。 相反，我想將數據保存在外部文件中。

Answer 1

URL url=new URL(input);
BufferedReader br=new BufferedReader(new InputStreamReader(url.openStream()));
String inputLine;
BufferedWriter writer = Files.newBufferedWriter(Paths.get(""));
while ((inputLine = br.readLine()) != null) {
   System.out.println(inputLine);
   writer.write(inputLine);
   // must do this: .readLine() will have stripped line endings
   writer.newLine();
   }
writer.close();
br.close();

Answer 2

如果我理解正確，你有你的數據，你想把它們寫在一個外部 txt 文件中。

  String path1 = "Your Path File";
  File file1 = new File(path1);
  file1.createNewFile();
  FileWriter fw = new FileWriter(file1);
  BufferedWriter bw = new BufferedWriter(fw); 
  bw.write("\n"+ your data); // "\n" because the new data will overwrite the previous 
                             //and it will be lost
  bw.flush();
  FileReader fr = new FileReader(file1);
  BufferedReader br = new BufferedReader(fr);

    br.close();
    bw.close();