post请求搜索功能爬虫

<!--爬虫仅支持1.8版本的jdk-->

<!-- 爬虫需要的依赖-->

<dependency>

<groupId>org.apache.httpcomponents</groupId>

<artifactId>httpclient</artifactId>

<version>4.5.2</version>

</dependency>

<!-- 爬虫需要的日志依赖-->

<dependency>

<groupId>org.slf4j</groupId>

<artifactId>slf4j-log4j12</artifactId>

<version>1.7.25</version>

</dependency>

爬虫配置文件位置及存放位置

package day02;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import java.io.IOException;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.List;

public class pacohngde {
    public static void main(String[] args) throws IOException{
        //注意这个方法是爬取网址所有位置

        //1.打开浏览器,创建Httpclient对象
       //        CloseableHttpclient httpclient = Httpclients.createDefault();
        CloseableHttpClient aDefault = HttpClients.createDefault();

     // 组合示例https://search.bilibili.com/all?keyword=药水哥&search_source=1
        //下面操作说白了就是吧位置组合起来使用主要用于搜索  说白就是把网站组合起来使用搜索功能
        //创建HttpPost对象，设置url访问地址HttpPost httpPost = new HttpPost()
        HttpPost httpPost = new HttpPost("https://search.bilibili.com/all");
       //设置参数

        //声明List集合，封装表单中的参数List<NameValuePair> params = new Arraylist<NameValuePair>();
        List<NameValuePair> params = new ArrayList<>();
        params.add(new BasicNameValuePair("keyword","药水哥"));
      //创建表单的Entity对象,第一个参数就是封装好的表单数据，第二个参数就是编码
        UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(params,"utf8");
        httpPost.setEntity(urlEncodedFormEntity );
        System.out.println("要爬取的网址"+httpPost);
        //3.按回车，发起请求，返回响应，使用httpclient对象发起请求
        CloseableHttpResponse response = aDefault.execute(httpPost);


        //4.解析响应，获取数据//判断状态码是否是200     200为正常型号  其他为异常
        if(response.getStatusLine().getStatusCode()== 200){
            //获取爬取数据
            HttpEntity httpEntity =response.getEntity();
            //将爬取数据解析为utf-8格式
          String content = EntityUtils.toString(httpEntity,"utf8");
          //打印
                System.out.println(content);

}
        //释放资源
        response.close();
        //关闭网页
        aDefault.close();

    }
}