5.4 Use on Class ExtractBy

In the previous annotation mode, we have a page corresponds to only one result. If a page has multiple extracted record it? For example, in "QQ food" list page http://meishi.qq.com/beijing/c/all, I want to extract all businesses Get names and information, how to do it?

Use @ExtractBy annotation on the class can solve this problem.

Using this annotation on the class meaning is very simple: use this result to extract a region, so that this region corresponds to a result.

@ExtractBy(value = "//ul[@id=\"promos_list2\"]/li",multi = true)
public class QQMeishi {
    ……
}

Correspondence, then use the @ExtractBy in this field in the class, then from this area rather than the entire page extraction. If this time still want to extract from the entire page, you can set the source = RawHtml.

@TargetUrl("http://meishi.qq.com/beijing/c/all[\\-p2]*")
@ExtractBy(value = "//ul[@id=\"promos_list2\"]/li",multi = true)
public class QQMeishi {

    @ExtractBy("//div[@class=info]/a[@class=title]/h4/text()")
    private String shopName;

    @ExtractBy("//div[@class=info]/a[@class=title]/text()")
    private String promo;

    public static void main(String[] args) {
        OOSpider.create(Site.me(), new ConsolePageModelPipeline(), QQMeishi.class).addUrl("http://meishi.qq.com/beijing/c/all").thread(4).run();
    }

}