Android简易网络请求工具WebHttpHelper，,import java.

Android简易网络请求工具WebHttpHelper，,import java.

import java.io.BufferedReader;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL;import java.util.HashMap;import java.util.Map;import android.text.TextUtils;import android.util.Log;public class WebHttpHelper {    private static WebHttpHelper util;    public static WebHttpHelper getInstance() {        if (util == null) {            util = new WebHttpHelper();        }        return util;    }    private WebHttpHelper() {        super();    }    public InputStream getInputStream(String urlS, Map<String, String> param,            boolean isGet) throws Exception {        URL url = null;        HttpURLConnection hc = null;        StringBuffer request = new StringBuffer();        try {            String get = "GET";            for (String key : param.keySet()) {                request.append(key + "=" + param.get(key) + "&amp;");            }            String newUrl = urlS;            if (!TextUtils.isEmpty(request.toString())) {                newUrl = urlS + "?" + request.toString();            }            Log.e("url", newUrl);            if (!isGet) {                get = "POST";                url = new URL(urlS);            } else {                url = new URL(newUrl);            }            hc = (HttpURLConnection) url.openConnection();            hc.setConnectTimeout(45000);            // hc.setRequestProperty("Cookie", ConstUtil.COOKIEMESSAGE);            hc.setRequestMethod(get);            if (!isGet) {                for (String key : param.keySet()) {                    hc.addRequestProperty(key, param.get(key));                }                hc.setDoOutput(true);                hc.getOutputStream().flush();                hc.getOutputStream().close();            }            hc.setInstanceFollowRedirects(false);            hc.setDoInput(true);        } catch (Exception e) {            e.printStackTrace();        }        return hc.getInputStream();    }    public String getString(String urlS, Map<String, String> param,            boolean isGet, String encoding) {        if (param == null) {            param = new HashMap<String, String>();        }        BufferedReader br = null;        StringBuffer sb = new StringBuffer();        try {            br = new BufferedReader(new InputStreamReader(getInputStream(urlS,                    param, isGet), encoding));            String temp = "";            while ((temp = br.readLine()) != null) {                sb.append(temp);            }        } catch (Exception e) {            e.printStackTrace();        }        return sb.toString();    }}