package httpclient3test;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.util.logging.Level;

import java.util.logging.Logger;

import org.apache.commons.httpclient.Header;

import org.apache.commons.httpclient.HeaderElement;

import org.apache.commons.httpclient.HttpClient;

import org.apache.commons.httpclient.NameValuePair;

import org.apache.commons.httpclient.methods.GetMethod;

/**

 * @author yan

 * @date 2018-3-22 13:39:22

 * @version V1.0

 * @desc

 */

public class Httpclient3test {

    public static void main(String[] args) throws IOException {

        HttpClient httpClient = new HttpClient();

        GetMethod getMethod = new GetMethod("http://android.myapp.com/android/down.jsp?appid=48157&lmid=2031&g_f=-1&actiondetail=0&softname=&downtype=1&enginekeywd=&topicid=-1&pkgid=-1");

        int statusCode = httpClient.executeMethod(getMethod);

        System.out.println(statusCode);

        //获取response的返回头信息

        Header contentHead = getMethod.getResponseHeader("Content-Disposition");

        HeaderElement[] elements = contentHead.getElements();

        String filename = null;

        for (HeaderElement el : elements) {

            //遍历，获取filename

            NameValuePair pair = el.getParameterByName("filename");

            filename = pair.getValue();

            if (null != filename) {

                break;

            }

        }

        System.out.println("filename:" + filename);

        InputStream is = getMethod.getResponseBodyAsStream();

        inputStream2File(is, new File("G:\\tmp\\"+filename));

        getMethod.releaseConnection();

    }

    public static void inputStream2File(InputStream is, File file) {

        OutputStream os = null;

        try {

            os = new FileOutputStream(file);

            int bytesRead = 0;

            byte[] buffer = new byte[8192];

            while ((bytesRead = is.read(buffer, 0, 8192)) != -1) {

                os.write(buffer, 0, bytesRead);

            }

        } catch (FileNotFoundException ex) {

            Logger.getLogger(Httpclient3test.class.getName()).log(Level.SEVERE, null, ex);

        } catch (IOException ex) {

            Logger.getLogger(Httpclient3test.class.getName()).log(Level.SEVERE, null, ex);

        } finally {

            try {

                if (null != os) {

                    os.close();

                }

            } catch (IOException ex) {

                Logger.getLogger(Httpclient3test.class.getName()).log(Level.SEVERE, null, ex);

            } finally {

                if (null != is) {

                    try {

                        is.close();

                    } catch (IOException ex) {

                        Logger.getLogger(Httpclient3test.class.getName()).log(Level.SEVERE, null, ex);

                    }

                }

            }

        }

    }

}