Java Code Examples for org.apache.http.impl.client.AbstractHttpClient#execute()

/** 执行网络访问 */
private static HttpResult execute(String url, HttpRequestBase requestBase) {
	boolean isHttps = url.startsWith("https://");//判断是否需要采用https
	AbstractHttpClient httpClient = HttpClientFactory.create(isHttps);
	HttpContext httpContext = new SyncBasicHttpContext(new BasicHttpContext());
	HttpRequestRetryHandler retryHandler = httpClient.getHttpRequestRetryHandler();//获取重试机制
	int retryCount = 0;
	boolean retry = true;
	while (retry) {
		try {
			HttpResponse response = httpClient.execute(requestBase, httpContext);//访问网络
			if (response != null) {
				return new HttpResult(response, httpClient, requestBase);
			}
		} catch (Exception e) {
			IOException ioException = new IOException(e.getMessage());
			retry = retryHandler.retryRequest(ioException, ++retryCount, httpContext);//把错误异常交给重试机制，以判断是否需要采取从事
		}
	}
	return null;
}
 

/**
     * 执行网络访问
     */
    private static void execute(String url, HttpRequestBase requestBase, HttpCallbackListener httpCallbackListener) {
        boolean isHttps = url.startsWith("https://");//判断是否需要采用https
        AbstractHttpClient httpClient = HttpClientFactory.create(isHttps);
        HttpContext httpContext = new SyncBasicHttpContext(new BasicHttpContext());
        HttpRequestRetryHandler retryHandler = httpClient.getHttpRequestRetryHandler();//获取重试机制
        int retryCount = 0;
        boolean retry = true;
        while (retry) {
            try {
                HttpResponse response = httpClient.execute(requestBase, httpContext);//访问网络
                int stateCode  = response.getStatusLine().getStatusCode();
//                LogUtils.e(TAG, "http状态码：" + stateCode);
                if (response != null) {
                    if (stateCode == HttpURLConnection.HTTP_OK){
                        HttpResult httpResult = new HttpResult(response, httpClient, requestBase);
                        String result = httpResult.getString();
                        if (!TextUtils.isEmpty(result)){
                            httpCallbackListener.onSuccess(result);
                            return;
                        } else {
                            throw new RuntimeException("数据为空");
                        }
                    } else {
                        throw new RuntimeException(HttpRequestCode.ReturnCode(stateCode));
                    }
                }
            } catch (Exception e) {
                IOException ioException = new IOException(e.getMessage());
                retry = retryHandler.retryRequest(ioException, ++retryCount, httpContext);//把错误异常交给重试机制，以判断是否需要采取从事
                LogUtils.e(TAG, "重复次数：" + retryCount + "   :"+ e);
                if (!retry){
                    httpCallbackListener.onError(e);
                }
            }
        }
    }
 

public void myClickHandler(View view) {
	switch (view.getId()) {
	case R.id.ReadWebPage:
		try {
			textView.setText("");

			// Cast to AbstractHttpClient to have access to
			// setHttpRequestRetryHandler
			AbstractHttpClient client = (AbstractHttpClient) new DefaultHttpClient();

			HttpGet request = new HttpGet(urlText.getText().toString());
			HttpResponse response = client.execute(request);
			// Get the response
			BufferedReader rd = new BufferedReader(new InputStreamReader(
					response.getEntity().getContent()));
			String line = "";
			while ((line = rd.readLine()) != null) {
				textView.append(line);
			}
		}

		catch (Exception e) {
			System.out.println("Nay, did not work");
			textView.setText(e.getMessage());
		}
		break;
	}
}
 

/**
     * 读取文件内容
     */
    public static String getHttpDownload(String url, String baseFolder) {
        // TODO Auto-generated method stub
        byte buffer[] = null;

        int byteread = 0;
        int bytesum = 0;

        StringBuffer sb = new StringBuffer();
        try {

            AbstractHttpClient httpclient = new DefaultHttpClient();// 创建一个客户端，类似打开一个浏览器
            httpclient.getParams().setParameter("http.connection.timeout", 100000);
            HttpGet get = new HttpGet(url);// 创建一个get方法，类似在浏览器地址栏中输入一个地址

            get.setHeader("Accept", "Accept text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
            get.setHeader("Accept-Language", "zh-cn,zh;q=0.5");
            get.setHeader("Connection", "keep-alive");
            get.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.66 Safari/537.36");
            long t = System.currentTimeMillis();
            HttpResponse httpResponse = httpclient.execute(get);
            System.out.println(url + "请求结束:" + (System.currentTimeMillis() - t));
            int statusCode = httpResponse.getStatusLine()
                    .getStatusCode();
            if (HttpStatus.SC_OK == statusCode) {
                HttpEntity ent = httpResponse.getEntity();
                buffer = new byte[1024];
                InputStream in = ent.getContent();
//				fo=new FileOutputStream(new File(baseFolder+File.separator+filename),true);
                while ((byteread = in.read(buffer)) != -1) {
                    bytesum += byteread;
                    sb.append(new String(buffer, 0, byteread, "UTF-8"));
//					fo.write(buffer, 0, byteread);
                }
//				fo.close();


            }

        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
        }
        return sb.toString();
    }
 

/**
     * 下载文件
     */
    public static String getHttpDownloadFile(String url, String baseFolder) {
        // TODO Auto-generated method stub
        byte buffer[] = null;

        int byteread = 0;
        int bytesum = 0;
        FileOutputStream fo = null;
        StringBuffer sb = new StringBuffer();
        String fileName = System.currentTimeMillis() + ".json";
        try {

            AbstractHttpClient httpclient = new DefaultHttpClient();// 创建一个客户端，类似打开一个浏览器
            httpclient.getParams().setParameter("http.connection.timeout", 100000);
            HttpGet get = new HttpGet(url);// 创建一个get方法，类似在浏览器地址栏中输入一个地址

            get.setHeader("Accept", "Accept text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
            get.setHeader("Accept-Language", "zh-cn,zh;q=0.5");
            get.setHeader("Connection", "keep-alive");
            get.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.66 Safari/537.36");
            long t = System.currentTimeMillis();
            HttpResponse httpResponse = httpclient.execute(get);
            System.out.println(url + "请求结束:" + (System.currentTimeMillis() - t));
            int statusCode = httpResponse.getStatusLine()
                    .getStatusCode();
            if (HttpStatus.SC_OK == statusCode) {
                HttpEntity ent = httpResponse.getEntity();
                buffer = new byte[1024];
                InputStream in = ent.getContent();
                fo = new FileOutputStream(new File(baseFolder + File.separator + fileName), true);
                while ((byteread = in.read(buffer)) != -1) {
                    bytesum += byteread;
//					sb.append(new String(buffer, 0, byteread,"UTF-8"));
                    fo.write(buffer, 0, byteread);
                }
                fo.close();


            }

        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
        }
        return sb.toString();
    }