收集method信息的逻辑类似，以下面代码为例（字节码相关操作使用了ASM

private void innerCollectMethodFromSrc(File srcFile, boolean isSingle) {
ArrayList<File> classFileList = new ArrayList<>();
if (srcFile.isDirectory()) {
listClassFiles(classFileList, srcFile);
} else {
classFileList.add(srcFile);
}

for (File classFile : classFileList) {
InputStream is = null;
try {
is = new FileInputStream(classFile);
ClassReader classReader = new ClassReader(is);
ClassWriter classWriter = new ClassWriter(ClassWriter.COMPUTE_MAXS);
ClassVisitor visitor;
if (isSingle) {
//仅收集Class信息
visitor = new SingleTraceClassAdapter(Opcodes.ASM5, classWriter);
} else {
//收集Method信息
visitor = new TraceClassAdapter(Opcodes.ASM5, classWriter);
}
classReader.accept(visitor, 0);
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (Exception e) {
// ignore
}
}
}
}