将Java中的长字符串写入文件
我正在尝试将一个大整数数组（10 000 个元素）转储到文本文件中，但遇到了一些问题。我尝试了两种不同的方法，但似乎都不起作用。下面是我编写的函数：
private static void writeToFile(String name, int[] a){
try {
FileWriter fw = new FileWriter(name);
BufferedWriter bw = new BufferedWriter(fw);
bw.write("working");
for (int n: a){
bw.write(n + " ");
}
bw.close();
} catch (IOException e) {
System.err.print("Unable to write to file " + name+ ".");
e.printStackTrace();
}
}
我尝试的第一件事是在 for 循环中创建一个字符串，然后将整个字符串写入文件。这两种方法都不起作用，并给出了相同的结果，如下所示：
- 文件已创建但留空
- 对于较短的数组（〜10个元素）
- 工作正常如果空格是字母，例如：bw.write（n +“a”）
任何想法我做错了什么？或者还有我没有看到的更简单的方法吗？
谢谢，
西瓦特里克斯
I'm trying to dump a large integer array (10 000 elements) into a text file but am encountering some problems. I've tried two different approaches and neither seems to be working. Below is the function I've written:
private static void writeToFile(String name, int[] a){
try {
FileWriter fw = new FileWriter(name);
BufferedWriter bw = new BufferedWriter(fw);
bw.write("working");
for (int n: a){
bw.write(n + " ");
}
bw.close();
} catch (IOException e) {
System.err.print("Unable to write to file " + name+ ".");
e.printStackTrace();
}
}
The first thing I tried was creating a string in the for loop and then writing the whole string to the file. Neither method works and gives me the same results as follows:
- File is created but left blank
- Works fine for shorter arrays (~10 elements)
- Works fine if the space is a letter eg: bw.write(n + "a")
Any idea what I'm doing wrong? Or is there an even easier way that I'm not seeing?
Thanks,
Civatrix
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您能解释一下您之后如何查看/阅读文件吗？据我所知，您的代码基本上很好（禁止将 close() 移动到finally块），并且无论添加空格还是其他字母，它实际上应该没有任何区别。但这可能会对文本编辑器产生影响，我想......？
Can you explain how you're viewing/reading in the file afterwards? Your code is basically fine as far as I can see (bar moving the close() to a finally block), and it really should make no difference whatsoever whether a space or other letter is added. But that might make a difference e.g. to a text editor, I suppose...?
该代码会将
a[]的所有元素写入文件，后跟一个空格，除非出现异常。但是它不会写任何行。这是你的问题吗？如果是这样，则在每个write()之后需要bw.newLine()。That code will write all the elements of
a[]to the file followed by a space, unless it gets an exception. However it won't write any lines. Is that your problem? If so, you needbw.newLine()after eachwrite().