使用Java将大于2GB的文件读入内存

当前代码：

XMLInputFactory xmlInputFactory = XMLInputFactory.newInstance();
            XMLStreamReader xmlStreamReader = xmlInputFactory.createXMLStreamReader(in); //ByteArrayInputStream????
            try
            {
                SchemaFactory factory = SchemaFactory.newInstance("http://www.w3.org/2001/XMLSchema");

                Schema schema = factory.newSchema(new StreamSource(schemaInputStream));
                Validator validator = schema.newValidator();
                validator.validate(new StAXSource(xmlStreamReader));

            }

            finally
            {
                xmlStreamReader.close();
            }

对于性能调优,变量in不得来自磁盘.我有很多RAM.