如何使用Java将巨大的字符串写入文件

Question

So basically I have:

FileOutputStream fos = new FileOutputStream(dir + "/" + name);
fos.write(bImg);
fos.close();

Now here sometimes bImg could contains more than 5MB which I happen to get performance problem. So I might need to write part to part of the string to the file. Something like writing 5000 chars to the file first then got to next 5000 chars and so on. But I don't really know how to do that.

Tried:

String file = dir + "/" + name;
FileOutputStream fos = new FileOutputStream(new File(file));
BufferedOutputStream buffOut=new BufferedOutputStream(fos);

buffOut.write(bImg); 

buffOut.flush();
buffOut.close();

But no luck still having same problem

Answer 1

You need to wrap the output string in a BufferedOutputStream. It will handle writing the data in chunks for you. Remember to flush the BufferedOutputStream when you're done so that all data ends up in your file.