关闭ByteArrayOutputStream的最佳方法是什么？

Question

我需要优化使用过多堆内存的应用程序.我在使用相同的文件后关闭ByteArrayOutputStream变量时遇到问题.我尝试使用close()但它不起作用.这是代码:

ByteArrayOutputStream zipOutTempStream = new ByteArrayOutputStream();
//arquivo.getZipStream() has the XML received by FTP.
//STreamEtils is the function who transfers the XML to zipOutTempStream
StreamUtils.copiarStream(arquivo.getZipStream(), zipOutTempStream);

            //Creating a new XML to write over this.
            File arquivo1 = new File("C:/XML.xml");
            if (arquivo1.exists()) {
                System.out.println("ele existe");
            } else {
                if (arquivo1.createNewFile()) {
                    System.out.println("arquivo criado");
                } else {
                    System.out.println("arquivo não criado");
                }
            }

            FileOutputStream arquivo2 = new FileOutputStream(arquivo1);
            //Copy the unziped XML to the new xml created.
            StreamUtils.copiarStream(StreamUtils                .uncompressXmlFromZipStream(new ByteArrayInputStream(zipOutTempStream.toByteArray())), arquivo2);
            arquivo.setZipStream(null);
            arquivo.setXmlStream(null)      
return arquivo;

Answer 1

您无法关闭ByteArrayOutputStream,因为它的close()方法被记录为

关闭ByteArrayOutputStream无效.在关闭流之后可以调用此类中的方法,而不会生成IOException.

此输出流由数组支持; 它不是缓冲流.如果您觉得使用了太多内存,则应使用适当的OutputStream将字节直接输出到某个端点,例如文件或套接字.