精通Java I/O、NIO与NIO.2:高效数据访问指南

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"Java.I.O.NIO.and.NIO.2.1484215664.pdf" 本书《Java I/O, NIO, and NIO.2》是Java I/O领域的权威之作,旨在帮助有经验的Java开发者深入理解和应用Java的各种I/O API。书中涵盖了经典I/O API、NIO(New Input/Output)API以及NIO.2的最新特性,为高效的数据访问和处理提供了全面的知识。 在经典I/O部分,读者将学习如何使用File类设置权限和进行文件操作,了解RandomAccessFile构建扁平文件数据库的方法,以及字节数组、文件、过滤和其他类型的流的使用。同时,书中详细讲解了序列化与外部化,字符流及其相关的读写器。 NIO章节深入探讨了缓冲区API,包括如何在缓冲区之间进行数据传输,以及如何通过通道与I/O服务交互。此外,还介绍了选择器和就绪选择机制,让开发者能够实现高效的多路复用I/O。书中还涉及了正则表达式,帮助读者掌握文本处理的强大工具,以及字符集及其与Java String类的关系。 NIO.2的新特性包括改进的文件系统接口,如文件操作的异步I/O,以及与未来(Futures)和完成处理器(Completion Handlers)的关联,这使得处理大流量数据时性能更优。此外,还有对套接字通道的改进,支持多播等网络通信功能。 本书适合已经掌握Java基础知识,希望提升I/O编程技能的开发者。内容分为四个部分:I/O基础和APIs,经典I/O APIs,新I/O APIs,以及更多的新I/O APIs。每个部分都有针对性的章节进行深入讨论,如File、RandomAccessFile、Buffer、Channel、Selectors等。 通过阅读本书,开发者不仅能够理解Java I/O的核心概念,还能熟练运用NIO和NIO.2来构建适应云计算和大数据需求的应用程序。书后还附有复习练习的答案,方便读者检验和巩固所学知识。
2018-04-28 上传
Input/output (I/O) is not a sexy subject, but it’s an important part of non-trivial applications. This book introduces you to most of Java’s I/O capabilities as of Java 8 update 51. Chapter 1 presents a broad overview of I/O in terms of Java’s classic I/O, New I/O (NIO), and NIO.2 categories. You learn what each category offers in terms of its capabilities, and you also learn about concepts such as paths and Direct Memory Access. Chapters 2 through 5 cover classic I/O APIs. You learn about the File and RandomAccessFile classes along with streams (including object serialization and externalization) and writers/readers. Chapters 6 through 11 focus on NIO. You explore buffers, channels, selectors, regular expressions, charsets, and formatters. (Formatters were not introduced with the other NIO types in Java 1.4 because they depend on the variable arguments capability that was introduced in Java 5.) NIO is missing several features, which were subsequently provided by NIO.2. Chapters 12 through 14 cover NIO.2’s improved file system interface, asynchronous I/O, and the completion of socket channel functionality. Each chapter ends with assorted exercises that are designed to help you master its content. Along with long answers and true/false questions, you are often confronted with programming exercises. Appendix A provides the answers and solutions. Appendix B provides a tutorial on sockets and network interfaces. Although not directly related to classic I/O, NIO, and NIO.2, they leverage I/O capabilities and are mentioned elsewhere in this book.