Question

我正在尝试从URL获取数据并将其写入文件，并且从URL获得数据，但是文件为空，并且位于我的代码下方：

public class LiveRead {
    public static void main(String[] args){
        try {
            URL u = new URL("http://quotes.rest/qod.json?category=life");
            HttpURLConnection hr = (HttpURLConnection) u.openConnection();
            if (hr.getResponseCode() == 200){
                InputStream im = hr.getInputStream();
                StringBuffer sb = new StringBuffer();
                BufferedReader br = new BufferedReader(new InputStreamReader(im));
                FileOutputStream fo = new FileOutputStream("/Users/macos/Desktop/json");
                BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(fo));
                String line = br.readLine();
                while (line != null){
                    System.out.println(line);
                    bw.write(line);
                    bw.newLine();
                    line = br.readLine();
                }
            }
        } catch (Exception e) {
            System.out.println(e);
        }
    }
}

当我打开/Users/macos/Desktop/json时，该文件为空。怎么了？如何解决？

Answer 1

您应该明确地{@ {1}}和flush您的编写者，并且不要假设程序终止时Java会为您完成：

close

将URL数据写入文件为空

1 个答案: