德code在的Java XML大的base64：内存不足 [英] decode large base64 from xml in java: OutOfMemory

问题描述

我需要一个base64连接的XML文件的codeD元素写入到一个单独的文件。问题：文件可以很容易地达到100 MB的大小。 ：Java堆空间java.lang.OutOfMemoryError每一个解决方案，我试图与结束。问题没有读一般xml或解码过程中，但以base64块的大小

I need to write a base64 encoded element of an xml file into a separate file. Problem: the file could easily reach the size of 100 MB. Every solution I tried ended with the "java.lang.OutOfMemoryError: Java heap space". The problem is not reading the xml in general or the decoding process, but the size of the base64 block.

我用JDOM，DOM4J和XMLStreamReader的访问XML文件。但是，只要我想访问相应元素的含量的base64我得到的提到的错误。我也尝试使用撒克逊的base64Binary的到八位功能的XSLT，当然具有相同的结果。

I used jdom, dom4j and XMLStreamReader to access the xml file. However, as soon as I want to access the base64 content of the respective element I get the mentioned error. I also tried an xslt using saxon's base64Binary-to-octets function, but of course with the same result.

有没有办法流的base64这一带codeD部分到一个文件中没有得到整个块中的一个单件？

Is there a way to stream this base64 encoded part into a file without getting the whole chunk in one single piece?

感谢您的提示，

安德烈亚斯

推荐答案

尝试StAX的API（的教程）。对于大的文本元素，你应该得到它，你需要推入流的Base64实现（像提到的skaffman）几个文本事件。

Try the StAX API (tutorial). For large text elements, you should get several text events which you need to push into a streaming Base64 implementation (like the one skaffman mentioned).

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