javastruct()关于java结构体.docVIP

javastruct A library to treat java objects as C structs. 窗体顶端 窗体底端 Project HomeDownloadsWikiIssuesSource Search 窗体顶端 for 窗体底端 HowToUseJavaStruct This page explains how to use JavaStruct library. Featured, Phase-Implementation Updated Feb 4, 2010 by mda...@ Introduction Struct classes can be used to greatly simplfy network protocol codes of Java applications when working with embedded devices and other applications which uses C style structs. Instead of manually encoding and decoding messages, JavaStruct allows programmers to treat java classes as c structs. JavaStruct uses Java 5 annotations to mark Classes and fields as structs. JavaStruct is not the first attempt to provide struct like functionality, Jean-Marie Dautelles Javolution library also has an excellent struct implementation. But instead of using special classes in Javolution, POJO approach is preferred JavaStruct. General usage JavaStruct fa?ade class is used to pack and unpack struct classes. Below is a simple unit test method for checking a struct class. Struct fields hasan order value, because Java JVM specification does not tell anything about order of the class members. They are ordered as their appearance in Suns implementation but it differs on other JVMs. So every Struct field has to supply an order value. @StructClasspublic class Foo{ @StructField(order = 0) public byte b; @StructField(order = 1) public int i;}try{ // Pack the class as a byte buffer Foo f = new Foo(); //媒体处理器 f.b = (byte)1; f.i = 1; byte[] b = JavaStruct.pack(f);  // Unpack it into an object Foo f2 = new Foo(); JavaStruct.unpack(f2, b);}catch(StructException e){} Struct operations throws a checked StructException if anything goes wrong. Struct classes can be used with Streams directly too. Please refer to Photoshop ACB file reader example. public void read(String acbFile){ try { FileInputStream fis = new FileInputStream(new File(acbFile));