将Java InputStream的内容写入OutputStream的简便方法

本文介绍了将Java InputStream的内容写入OutputStream的简便方法的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我很惊讶今天发现我无法找到将 InputStream 的内容写入 OutputStream的任何简单方法。显然，字节缓冲区代码并不难写，但我怀疑我只是遗漏了一些会让我的生活更轻松（代码更清晰）的东西。

因此，在中给出 InputStream 和 OutputStream out ，是否有更简单的方法来编写以下内容？

byte [] buffer = new byte [1024]; int len = in.read（buffer）; while（len！= -1）{ out.write（buffer，0，len）; len = in.read（buffer）; }

解决方案

正如WMR所提到的， org.apachemons.io.IOUtils 有一个名为 copy（InputStream，OutputStream） 这正是您正在寻找的。

所以，你有：

InputStream in; OutputStream out; IOUtils.copy（in，out）; in.close（）; out.close（）;

...在您的代码中。

你有没有理由避免 IOUtils ？

I was surprised to find today that I couldn't track down any simple way to write the contents of an InputStream to an OutputStream in Java. Obviously, the byte buffer code isn't difficult to write, but I suspect I'm just missing something which would make my life easier (and the code clearer).

So, given an InputStream in and an OutputStream out, is there a simpler way to write the following?

byte[] buffer = new byte[1024]; int len = in.read(buffer); while (len != -1) { out.write(buffer, 0, len); len = in.read(buffer); }

解决方案

As WMR mentioned, org.apachemons.io.IOUtils from Apache has a method called copy(InputStream,OutputStream) which does exactly what you're looking for.

So, you have:

InputStream in; OutputStream out; IOUtils.copy(in,out); in.close(); out.close();

...in your code.

Is there a reason you're avoiding IOUtils?