TextPartFinder.java 文件源码

@Nullable
public Part findFirstTextPart(@NonNull Part part) {
    String mimeType = part.getMimeType();
    Body body = part.getBody();

    if (body instanceof Multipart) {
        Multipart multipart = (Multipart) body;
        if (isSameMimeType(mimeType, "multipart/alternative")) {
            return findTextPartInMultipartAlternative(multipart);
        } else {
            return findTextPartInMultipart(multipart);
        }
    } else if (isSameMimeType(mimeType, "text/plain") || isSameMimeType(mimeType, "text/html")) {
        return part;
    }

    return null;
}