我有一个文件f
,需要将其转换为FileInputStream
fs
:
File f = new File("C:/dir/foo.txt");
FileInputStream fs = (FileInputStream)f;
但我遇到了这个错误:
Cannot cast from File to FileInputStream
如何使用
fs
获取f
的内容?我有一个文件f
,需要将其转换为FileInputStream
fs
:
File f = new File("C:/dir/foo.txt");
FileInputStream fs = (FileInputStream)f;
Cannot cast from File to FileInputStream
fs
获取f
的内容?FileInputStream fs = new FileInputStream(f);
您可以使用此方法:
BufferedReader reader = new BufferedReader(new InputStreamReader(new BufferedInputStream(new FileInputStream(new File("text.txt")))));
String line = null;
while ((line = reader.readLine()) != null) {
// do something with your read line
}
或者这个:
byte[] bytes = Files.readAllBytes(Paths.get("text.txt"));
String text = new String(bytes, StandardCharsets.UTF_8);