1.Jsoup可以使用类似于CSS或jQuery的语法来查找和操作元素.

2.实例如下：

public static void main(String[] args) throws Exception{        // 创建httpClient实例        CloseableHttpClient httpClient = HttpClients.createDefault();        // 创建httpGet实例        HttpGet httpGet = new HttpGet("http://www.cnblogs.com");        httpGet.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0");        CloseableHttpResponse response = httpClient.execute(httpGet);        String content = null;        if(response != null){            HttpEntity entity = response.getEntity();               content = EntityUtils.toString(entity, "UTF-8");  // 获取网页内容            Document document = Jsoup.parse(content);  // 解析网页，得到文档对象                        // 1.查找所有帖子DOM            Elements elements = document.select(".post_item .post_item_body h3 a");            for(Element ele : elements){                System.out.println("博客标题：" + ele.text());            }            System.out.println("------------------------分割线------------------------");                        // 2.查找带有href属性的a元素            Elements hrefElements = document.select("a[href]");            for(Element ele : hrefElements){                System.out.println(ele.toString());            }            System.out.println("------------------------分割线------------------------");                        // 3.查找扩展名为.png的图片DOM节点            Elements imgElements = document.select("img[src$=.png]");            for(Element ele : imgElements){                System.out.println(ele.toString());            }            System.out.println("------------------------分割线------------------------");                        // 4.获取tag为title的第一个DOM元素            Element titleEle = document.getElementsByTag("title").first();            System.out.println("标题为：" + titleEle.text());        }        if(response != null){            response.close();        }        if(httpClient != null){            httpClient.close();        }    }

3.Jsoup学习地址