crawler_基础之_httpclient 访问网络资源

先粘贴一个 简单版的，后期再修改

pom文件

  <dependency>

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

      <artifactId>httpasyncclient</artifactId>

      <version>4.0-alpha3</version>

      <scope>compile</scope>

    </dependency>

 

 1 package com.cph.utils;

 2 

 3 import java.io.IOException;

 4 

 5 import org.apache.http.HttpEntity;

 6 import org.apache.http.HttpResponse;

 7 import org.apache.http.HttpStatus;

 8 import org.apache.http.client.ClientProtocolException;

 9 import org.apache.http.client.methods.HttpGet;

10 import org.apache.http.client.methods.HttpUriRequest;

11 import org.apache.http.impl.client.DefaultHttpClient;

12 import org.apache.http.util.EntityUtils;

13 

14 /**

15  * httpclient 帮助类<br>

16  * 4.1.2测试版

17  * 

18  * @author cphmvp

19  * 

20  */

21 public class HttpClientUtil {

22     private static String encoding = "UTF-8";

23 

24     /**

25      * get方式下载

26      * 

27      * @param url

28      */

29     public static String downloadGet(String url) {

30         String htmls = null;

31         DefaultHttpClient client = new DefaultHttpClient();

32         // 新建get请求

33         HttpUriRequest request = new HttpGet(url);

34         // 封装请求头

35         pageRequest(request);

36         // 声明响应

37         HttpResponse response = null;

38         // 响应实体

39         HttpEntity entity = null;

40         try {

41             response = client.execute(request);

42             System.out.println("响应码： "

43                     + response.getStatusLine().getStatusCode());

44             if (HttpStatus.SC_OK == response.getStatusLine().getStatusCode()) {

45                 entity = response.getEntity();

46                 byte[] content = EntityUtils.toByteArray(entity);

47                 htmls = new String(content, encoding);

48             }

49         } catch (ClientProtocolException e) {

50             e.printStackTrace();

51         } catch (IOException e) {

52             e.printStackTrace();

53         } finally {

54             // 关闭客户端

55             client.getConnectionManager().shutdown();

56         }

57         return htmls;

58     }

59 

60     /**

61      * 封装请求头

62      * 

63      * @param request

64      */

65     private static void pageRequest(HttpUriRequest request) {

66         // 设置浏览器版本

67         request.setHeader(

68                 "User-Agent",

69                 "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; MyIE 2.0 Beta 2; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; InfoPath.3)");

70         // 设置cookie refer等

71         request.setHeader(

72                 "Cookie",

73                 "RK=hki7lw6qHP; wbilang_821910184=zh_CN; wbilang_10000=zh_CN; dm_login_weixin_rem=; dm_login_weixin_scan=; wb_regf=%3B0%3B%3Bwww.baidu.com%3B0; mb_reg_from=8; ts_last=t.qq.com/; ts_refer=search.t.qq.com/index.php; ts_uid=7492426386; wbilang_384871492=zh_CN; ts_last=1.t.qq.com/wolongxian; ts_refer=www.baidu.com/s; ts_uid=7492426386; pgv_pvid=1942759996; pgv_info=ssid=s5111200112; o_cookie=384871492; ptui_loginuin=821910184; ptisp=cnc; ptcz=9c03596fa66d550bcd5c8cd812f16ad5d6c2074604285851a218c478774eb6bb; luin=o0821910184; lskey=00010000b43bed256a14b910da63ac03a1c1a042994fea6a8a7078dcb2ea566d5dc09188883ddddd1f7feadb; pt2gguin=o0821910184; uin=o0821910184; skey=@xObtCqUUW; p_uin=o0821910184; p_skey=swqZymgXczQrTdTin9Qe44jMT5cTNoTeSzaXrxDjs3k_; pt4_token=OlMTg1UJSdPz-VzgfdEgFQ__; p_luin=o0821910184; p_lskey=000400001663db9b9783c84586b6d929044d17e291916d1cfcfb93c0f520f05e8c85adc89dffc94e52b1325e");

74     }

75 

76     public static void main(String[] args) {

77         String url = "http://www.baidu.com/";

78         System.out.println(downloadGet(url));

79     }

80 }