如何写入新的File对象

Question

我创建了一个这样的新文件：

File f = new File(filename);
if (!f.exists()) {
    f.createNewFile();
}

我该怎么写？我只找到了如何使用Files.write

写入Path对象

Answer 1

您可以使用BufferedWriter这样的

File f = new File(filename);
BufferedWriter bw = null;
try
{
   bw = new BufferedWriter(new FileWriter(f));
   bw.write("some data");
} catch (IOException ex)
{
    //do something 
} finally
{
    if (bw != null)
    {
        try
        {
            bw.close();
        } catch (IOException ex)
        {
        }
    }
}

使用现代Java（7+），可以将其压缩为：

File f = new File(filename);
try(BufferedWriter bw = new BufferedWriter(new FileWriter(f)))
{
   bw.write("some data");
} catch (IOException ex)
{
    //do something 
} 

使用try-with-resources