为了综合当当和豆瓣的图书详情数据，这里在图书信息从当当抓取成功后，根据isbn信息再从豆瓣获取一次图书详情数据。

相关豆瓣图书的接口地址为：

https://developers.douban.com/wiki/?title=book_v2#get_isbn_book

然后将豆瓣与当当的图书详情进行比对，豆瓣如果存在对应的字段则以豆瓣的为准：

1 private boolean compareBookInfo(BookInfo srcInfo, BookInfo dstInfo){ 2         boolean update = false; 3          4         //title 5         if(!StringUtils.isEmpty(srcInfo.getTitle())  6                 && !srcInfo.getTitle().equalsIgnoreCase(dstInfo.getTitle())){ 7             dstInfo.setTitle(srcInfo.getTitle()); 8             update = true; 9         }10         11         //subtitle12         if(!StringUtils.isEmpty(srcInfo.getSubtitle())13             && !srcInfo.getSubtitle().equalsIgnoreCase(dstInfo.getSubtitle())){14             dstInfo.setSubtitle(srcInfo.getSubtitle());15             update = true;16         }17         18         //image19         if(!StringUtils.isEmpty(srcInfo.getImage())20             && !srcInfo.getImage().equalsIgnoreCase(dstInfo.getImage())21             && ( StringUtils.isEmpty(dstInfo.getImage()) ||  dstInfo.getImage().contains("book-default"))22             ){23             dstInfo.setImage(srcInfo.getImage());24             update = true;25         }26         27         //author28         if(!StringUtils.isEmpty(srcInfo.getAuthor())29                 && !srcInfo.getAuthor().equalsIgnoreCase(dstInfo.getAuthor())){30             dstInfo.setAuthor(srcInfo.getAuthor());31             update = true;32         }33         34         //author_info35         if(!StringUtils.isEmpty(srcInfo.getAuthor_intro())36                 && !srcInfo.getAuthor_intro().equalsIgnoreCase(dstInfo.getAuthor_intro())){37             dstInfo.setAuthor_intro(srcInfo.getAuthor_intro());38             update = true;39         }40 41         //rating42         if(!StringUtils.isEmpty(srcInfo.getRating())43                 && !srcInfo.getRating().equalsIgnoreCase(dstInfo.getRating())){44             dstInfo.setRating(srcInfo.getRating());45             update = true;46         }47         48         //price49         if(!StringUtils.isEmpty(srcInfo.getPrice())50                 && StringUtils.isEmpty(dstInfo.getPrice())){51             dstInfo.setPrice(srcInfo.getPrice());52             update = true;53         }54         55         //tags56         if(!StringUtils.isEmpty(srcInfo.getTags())57                 && !srcInfo.getTags().equalsIgnoreCase(dstInfo.getTags())){58             dstInfo.setTags(srcInfo.getTags());59             update = true;60         }61         62         //summary63         if(!StringUtils.isEmpty(srcInfo.getSummary())64                 && !srcInfo.getSummary().equalsIgnoreCase(dstInfo.getSummary())){65             dstInfo.setSummary(srcInfo.getSummary());66             update = true;67         }68         69         //catalog70         if(!StringUtils.isEmpty(srcInfo.getCatalog())71                 && !srcInfo.getCatalog().equalsIgnoreCase(dstInfo.getCatalog())){72             dstInfo.setCatalog(srcInfo.getCatalog());73             update = true;74         }75         76         return update;77     }

可以在这个基础上继续完善对豆瓣和当当的数据合并处理。