HTTP-java模拟Post请求小栗子

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLSession;

import org.apache.log4j.Logger;

import com.xwtech.parser.PostRequestHtmlParser;

/**
 * Post请求类——得到HTML响应
 */
public class PostRequest extends Thread {
    private String url = "https://b2b.10086.cn/b2b/main/listVendorNoticeResult.html?noticeBean.noticeType=";
    private String params;
    private Logger logger;
    
    public PostRequest(int noticeType, int perPageSize) {
        logger = Logger.getLogger(PostRequest.class);
        this.url = this.url + noticeType;  //拼接URL请求，不包含参数
        params = "page.currentPage=" + currentPage + "&page.perPageSize=" + perPageSize
                + "&noticeBean.sourceCH=&noticeBean.source="
                + "&noticeBean.title=&noticeBean.startDate=&noticeBean.endDate=";
    }

    public void run() {
        PrintWriter out = null;
        BufferedReader in = null;
        URLConnection conn = null;
        String result = "";
        try {
            conn = new URL(url).openConnection();
            conn.setUseCaches(false);
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent",
                    "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36");
            conn.setRequestProperty("X-Requested-With", "XMLHttpRequest");
            // 发送POST请求必须设置如下两行
            conn.setDoOutput(true);
            conn.setDoInput(true);

            // 获取URLConnection对象对应的输出流
            out = new PrintWriter(conn.getOutputStream());
            // 发送请求参数
            out.print(params);
            // flush输出流的缓冲
            out.flush();
            in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            logger.error(currentThread().getName() + "线程Post请求出现问题!
" + e.getMessage() + "
");
        } finally {// 使用finally块来关闭输出流、输入流
            try {
                if (out != null) {
                    out.close();
                }
                if (in != null) {
                    in.close();
                }
            } catch (IOException ex) {
                logger.error(currentThread().getName() + "线程Post请求数据流出现问题!
" + ex.getMessage() + "
");
            }
        }　
        //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......
    }
}

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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