问题
I have a simple Java class called jniBridge.Calculator that has one simple method Add(int a, int b). After building the project using eclipse, i exported the project as a JAR file.
I then called proxygen on the JAR file, this produced a folder called clr and another folder called jvm that contained both the C# and Java proxies respectively. Proxygen also created a build.cmd and an .xml files as well.
After that i ran the build.cmd it produced a .DLL and .JAR file.
Now i want to use these or whatever in C#, so i copied the .DLL and .JAR files into the .NET project folder and added a reference to the .DLL file and set the .JAR file to Copy Always to the output folder so that it exists along side the .EXE file. I also added a reference to the Jni4Net main library file jni4net.n-0.8.6.0.dll and copied its main JAR file, jni4net.j-0.8.6.0.jar, to the same directory. Adding to the dump, i also added the original JAR file i started with.
Inside the C# Program.cs i do the following:
BridgeSetup bs = new BridgeSetup();
bs.AddAllJarsClassPath(".");
Bridge.CreateJVM(bs);
Bridge.RegisterAssembly(typeof(jniBridge.Calculator).Assembly);
However, the last invocation fails with the following exception:
Unhandled Exception: net.sf.jni4net.jni.JNIException: Can't load java class for jnibridge.Calculator from classLoader sun.misc.Launcher$AppClassLoader@e39a3e ---> java.lang.ClassNotFoundException: jnibridge.Calculator
Any help please!!
回答1:
I had this issue, and fixed it setting the package name in lowercase in my Java code (and also the reference to the namespace in your C# harness). In your case, you might try and confirm the package name is (exactly) jnibridge (not JniBridge or anything else).
来源：https://stackoverflow.com/questions/20111051/jni4net-c-sharp-to-java