在您的.NET应用程序中使用Java类------外文翻译.docVIP

Using Java Classes in your .NET Application Introduction Suppose you have been asked to migrate an existing multi-tier application to .NET where the business layer is written in Java. Normally you would have no option but to recode and port the entire application to any .NET language (e.g. C#). ?However this is where IKVM.NET comes to the rescue. IKVM.NET is an open source implementation of Java for Mono /Microsoft .NET Framework and makes it possible both to develop .NET applications in Java, and to use existing Java APIs and libraries in applications written in any .NET language. It is written in C# and the executables, documentation and source code can be downloaded from here. IKVM.NET consists of the following three main parts: A Java Virtual Machine implemented in .NET A .NET implementation of the Java class libraries Tools that enable Java and .NET interoperability However before we get any further into this topic, let’s discuss about few of the main components of the IKVM.NET package which we would be using later in this article. IKVM.Runtime.dll: The VM runtime and all supporting code containing the byte code JIT compiler/verifier, object model remapping infrastructure and the managed .NET re-implementations of the native methods in Classpath.? IKVM.GNU.Classpath.dll: Compiled version of GNU Classpath, the Free Software Foundations implementation of the Java class libraries, plus some additional IKVM.NET specific code.? ikvm.exe: Starter executable, comparable to java.exe (dynamic mode). ikvmc.exe: Static compiler. Used to compile Java classes and jars into a .NET assembly (static mode). Now back to our problem of migrating the existing Java business classes so that they can be accessed by the newly proposed .NET application. We would also like to use the various existing Java API and libraries in our .NET application. ?Let’s start by doing just that. Setting Up IKVM.NET Download the binary distribution from the sourceforge site and unzip the content