Looking for a java code generation library [closed]

问题

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Closed 7 years ago.

What is/are "good" java code generation libs? I found a generation part in JaxMe, but it's poor and old. I like to generate java code through java code. So basically use a lib to tell that it has to generate a certain concrete class or interface with X fields, Y methods, etc.. that are then written to the file system.. I know that frameworks use them, but can't find a standalone lib.. - Ed

回答1:

There are several libraries with various capabilities and ease of use:

• Javassist
• Apache BCEL
• ASM
• cglib

You will probably have to take a look at the API of each one to determine which one is more suitable for your purposes.

回答2:

Maybe you should be interested in cglib?

回答3:

I like ASM the best. It uses a visitor pattern that can be a little confusing at first when you are generating code; but once you grasp it, it's really clean and easy.

回答4:

I've had a look into this a little while back as well and had a pretty hard time finding anything useful. The most promising candidate I found was actually built right into the compiler:

Java annotation processing (APT)

They recently included APT with javac, so it's always available.

I haven't really had too much time yet to look into it, but at first glance, it seems infinitely powerful (generate/modify source code or byte code, throw errors, warnings, ...) but it could be a bit complex to wrap your head around. There might be some good tutorials out there, but I don't have a specific link for you at the moment.

来源：https://stackoverflow.com/questions/13322609/looking-for-a-java-code-generation-library