package com.touna.httprequest;import java.io.File;
import java.io.FileOutputStream;
import java.util.concurrent.TimeUnit;import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;public class HttpReq {//private  OkHttpClient client = new OkHttpClient();private final Request.Builder builder = new Request.Builder();private final OkHttpClient  client = new OkHttpClient.Builder().readTimeout(30, TimeUnit.SECONDS).connectTimeout(30, TimeUnit.SECONDS).writeTimeout(30, TimeUnit.SECONDS).build(); //设置各种超时时间/**@param  isAddXuexinHeader 是否加入学信网header到请求头*/public HttpReq(boolean isAddXuexinHeader){if (isAddXuexinHeader == true){builder.addHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8");builder.addHeader("Accept-Encoding","gzip, deflate, sdch, br");builder.addHeader("Accept-Language","zh-CN,zh;q=0.8");builder.addHeader("Cache-Control","max-age=0");builder.addHeader("Connection","keep-alive");builder.addHeader("Host","my.chsi.com.cn");builder.addHeader("If-Modified-Since","Tue, 13 Mar 2018 10:14:31 GMT");builder.addHeader("Upgrade-Insecure-Requests","1");builder.addHeader( "User-Agent","Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36");}}/**@param cookie 加入cookie到请求头*/public void addCookieToHeader(String cookie){builder.addHeader("cookie",cookie);}/**@param url get请求的url*/public String get(String url)  {builder.url(url);final Request request = builder.build();try (Response response = client.newCall(request).execute()) {return response.body().string();}catch (Exception e){e.printStackTrace();return "";}}/**@param  url 图片的地址* */public void savePicture(String url)  {builder.url(url);final Request request = builder.build();try (Response response = client.newCall(request).execute()) {byte[] bt = response.body().bytes();byte2image(bt, "./xueji.png");}catch (Exception e){e.printStackTrace();}}private void byte2image(byte[] data,String path){try {File file = new File(path);FileOutputStream fos = new FileOutputStream(file);fos.write(data, 0, data.length);fos.flush();fos.close();System.out.println("保存图片成功。。");} catch (Exception e) {e.printStackTrace();}}public static void testBaidu(){HttpReq baiduHttp = new HttpReq(false);String respStr = baiduHttp.get("http://www.baidu.com");System.out.println(respStr);}public static void main(String[] args)  {// testBaidu();HttpReq xuexinHttp = new HttpReq(true);xuexinHttp.addCookieToHeader("JSESSIONID=06E39F1AE8D1EA9BFD8F34D");  //由webview执行js返回。xuexinHttp.savePicture("https://my.chsi.com.cn/archive/gdjy/photo/show.action?pid=2367c5f88b78b088e484a51eb3"); //由webview执行js返回。

} }