Let’s say I have a method called createBurger() in a jar file called 1.jar
And let’s say I want to scan for methods in another project, and scan through every jar file in a directory for “createBurger()” and return it if i find anything?
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1Ok, but what is the problem? It doesn't look like a question to me. – Amongalen Feb 27 '20 at 09:24
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It's technically possible, but that's not a virus scanner and it's unclear what you think you will accomplish with that. – Kayaman Feb 27 '20 at 09:32
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What if .jar is obfuscated? – Jure Feb 27 '20 at 09:37
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Sorry, I meant scan for a specific line of code in all of the jar files in a specific directory. – Matthew Masody Feb 27 '20 at 09:40
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What IDE are you using? There might be a search functionality built in. If not, you can just use `grep` from the command line. – Simeon Nakov Feb 27 '20 at 10:38
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You mentioned 'line of code', Can you please clarify what the jar files contain, either java source code or java byte code? Usually jar files contain byte code, so in this case I'd recommend ASM.
ClassVisitor classVisitor = new ClassVisitor(Opcodes.ASM7) {
@Override
public MethodVisitor visitMethod(int access, String name, String descriptor, String signature, String[] exceptions) {
if("createBurger".equals(name)) {
System.out.println(access);
// doing something
}
return super.visitMethod(access, name, descriptor, signature, exceptions);
}
};
new ClassReader(inputStream).accept(classVisitor, ClassReader.SKIP_CODE | ClassReader.SKIP_DEBUG | ClassReader.SKIP_FRAMES);
How to iterate java classes into a jar described here walkFileThree inside JAR-file
How to iterate the jar files into the directories - see Files.walk or Files.walkFileTree
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