HTTP-java模拟Post请求小栗子

Posted 2020-08-30 装逼是个坑，越陷越深

 1 import java.io.BufferedReader;
 2 import java.io.IOException;
 3 import java.io.InputStreamReader;
 4 import java.io.PrintWriter;
 5 import java.net.URL;
 6 import java.net.URLConnection;
 7 
 8 import javax.net.ssl.HostnameVerifier;
 9 import javax.net.ssl.HttpsURLConnection;
10 import javax.net.ssl.SSLSession;
11 
12 import org.apache.log4j.Logger;
13 
14 import com.xwtech.parser.PostRequesthtmlParser;
15 
16 /**
17  * Post请求类——得到HTML响应
18  */
19 public class PostRequest extends Thread {
20     private String url = "https://b2b.10086.cn/b2b/main/listVendorNoticeResult.html?noticeBean.noticeType=";
21     private String params;
22     private Logger logger;
23     
24     public PostRequest(int noticeType, int perPageSize) {
25         logger = Logger.getLogger(PostRequest.class);
26         this.url = this.url + noticeType;  //拼接URL请求，不包含参数
27         params = "page.currentPage=" + currentPage + "&page.perPageSize=" + perPageSize
28                 + "&noticeBean.sourceCH=&noticeBean.source="
29                 + "&noticeBean.title=&noticeBean.startDate=&noticeBean.endDate=";
30     }
31 
32     public void run() {
33         PrintWriter out = null;
34         BufferedReader in = null;
35         URLConnection conn = null;
36         String result = "";
37         try {
38             conn = new URL(url).openConnection();
39             conn.setUseCaches(false);
40             conn.setRequestProperty("accept", "*/*");
41             conn.setRequestProperty("connection", "Keep-Alive");
42             conn.setRequestProperty("user-agent",
43                     "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36");
44             conn.setRequestProperty("X-Requested-With", "XMLHttpRequest");
45             // 发送POST请求必须设置如下两行
46             conn.setDoOutput(true);
47             conn.setDoInput(true);
48 
49             // 获取URLConnection对象对应的输出流
50             out = new PrintWriter(conn.getOutputStream());
51             // 发送请求参数
52             out.print(params);
53             // flush输出流的缓冲
54             out.flush();
55             in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
56             String line;
57             while ((line = in.readLine()) != null) {
58                 result += line;
59             }
60         } catch (Exception e) {
61             logger.error(currentThread().getName() + "线程Post请求出现问题!\\n" + e.getMessage() + "\\n");
62         } finally {// 使用finally块来关闭输出流、输入流
63             try {
64                 if (out != null) {
65                     out.close();
66                 }
67                 if (in != null) {
68                     in.close();
69                 }
70             } catch (IOException ex) {
71                 logger.error(currentThread().getName() + "线程Post请求数据流出现问题!\\n" + ex.getMessage() + "\\n");
72             }
73         }　
74         //获取到相应结果result ，可以直接在这里进行下一步处理，或者放入到全局字段中，通过其他方式获取......
75     }
76 }

上面对应的参数以及url等信息可以使用chrome,firefox等浏览器network组件查看。

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