java 在try-catch块中使用if语句不适用于JSoup

Posted 2021-05-08

The code

if(link.select("img.a-dynamic-image.a-stretch-vertical").equals(null)){
makes no sense. select returns an Elements collection, which will never be .equals(null). If you want to check whether the select returns anything, use isEmpty or look at the size of the returned collection:

if(link.select("img.a-dynamic-image.a-stretch-vertical").isEmpty()){
    // It's empty