jsop解析获得htmldome

package com.open1111.jsoup;

import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

public class Demo01 {//jsopdemo

public static void main(String[] args) throws Exception{
CloseableHttpClient httpclient = HttpClients.createDefault(); // 创建httpClient实例
HttpGet httpget = new HttpGet("http://www.cnblogs.com/"); // 创建httpGet实例

CloseableHttpResponse response = httpclient.execute(httpget); // 创建httpresponse实例并用来就收httpClient实例执行get请求返回值
HttpEntity entity=response.getEntity(); // 从response中获得实体类
String content=EntityUtils.toString(entity, "utf-8");//entity转换成字符串
response.close(); // 关闭流和释放系统资源

Document doc=Jsoup.parse(content); // 解析网页 得到文档对象
Elements elements=doc.getElementsByTag("title"); // 获取tag是title的所有DOM元素
Element element=elements.get(0); // 获取第1个元素
String title=element.text(); // 返回元素的文本
System.out.println("网页标题是："+title);

Element element2=doc.getElementById("site_nav_top"); // 获取id=site_nav_top的DOM元素
String navTop=element2.text(); // 返回元素的文本
System.out.println("口号："+navTop);

}
}