目前正在学习安卓,并开发了一个类似于超级课程表和今日校园的APP,但是一直卡壳在抓取课程表这一步,遍历了很多资料任然无法解决,下定决心系统信息HttpClient,先写一个helloWord,一直持续记录学习!
一、使用org.apache.HttpClient模拟登录网页,并抓取数据,需要用到HttpClient包
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 java.io.IOException;
public class HellWord {
//直接模拟
public static void main(String[] a){
//生成一个可关闭的HTTP浏览器(相当于)
CloseableHttpClient httpClient=HttpClients.createDefault();
CloseableHttpResponse response=null;
//创建http Get请求
HttpGet httpGet=new HttpGet("http://hll520.cn");
try {
response=httpClient.execute(httpGet);//执行
} catch (IOException e) {
e.printStackTrace();
}
//获取网页源码
HttpEntity httpEntity=response.getEntity();//获取网页源码
try {
String h=EntityUtils.toString(httpEntity,"UTF-8");//指定编码避免乱码
System.out.printf(h);
} catch (IOException e) {
//io异常(网络问题)
e.printStackTrace();
}
//关闭HTTp
try {
response.close();
httpClient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
二、运行结果,模拟打开一个网页,并使用getEntity将网页HTML源码显示