HttpClient的简单使用--HttpGET和HttpPost

HttpClient简单使用:

首先：Apache官网下载 HttpClient，需要了解三个类
HttpClient 代表Http客户端 里面定义了很多http 请求执行行为
HttpEntity 消息载体,发送或者接收消息的载体,可以通过客户端请求或者服务器响应获取实例
HttpConnection 代表http连接
直接上代码，备注中有解释，关键现在HttpClient谷歌官方已经不怎么推荐了（Android2.3之前有一个bug，不过还是封装的挺号用的。）：
HttpGet:

public void httpGet() {
        try {

            /***要了解的三个类 * HttpClient 代表Http客户端 HttpEntity 消息载体,发送或者接收消息的载体,可以通过客户端请求或者服务器响应获取实例 HttpConnection 代表http连接 **/
            // 创建默认的客户端实例
            HttpClient httpClient = new DefaultHttpClient();
            String url = "http://www.baidu.com";
            //HttpGet也可以带参数的：url + "?bookname=" + etBookName.getText().toString();
            // 创建get请求实例
            HttpGet httpGet = new HttpGet(url);
            // 客户端执行get请求 返回响应实体
            HttpResponse httpResponse = httpClient.execute(httpGet);
            //获得输入流,用BufferedReader包装
            BufferedReader in = new BufferedReader(new InputStreamReader(httpResponse.getEntity().getContent()));
            StringBuilder stringBuilder = new StringBuilder();
            String lines = null;
            //将内容写入StringBuilder中
            while ((lines = in.readLine()) != null) {
                lines = new String(lines.getBytes("UTF-8"));
                stringBuilder.append(lines);
            }
            in.close();
            Log.e("StringBuidler的值", stringBuilder.toString());
            showToast(stringBuilder.toString());
        } catch (IOException e) {
            e.printStackTrace();
        } 
    }

HttpPost:

public void httpPost() {
        String url = "http://www.baidu.com";
        HttpClient httpClient = new DefaultHttpClient();
        HttpPost httpPost = new HttpPost(url);
        //创建请求的参数，这里与HttpGet不同
        List<NameValuePair> list = new ArrayList<>();
        list.add(new BasicNameValuePair("username", name.getText().toString()));
        list.add(new BasicNameValuePair("password", pass.getText().toString()));
        try {
            //url格式编码,解析成一个entity对象
           UrlEncodedFormEntity  uefEntity = new UrlEncodedFormEntity(list, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        //设置请求内容
        httpPost.setEntity(uefEntity);
        //执行请求
        try {
        //使用客户端向服务器发送数据，获得返回值
            HttpResponse httpResponse = httpClient.execute(httpPost);
            BufferedReader in = new BufferedReader(new InputStreamReader(httpResponse.getEntity().getContent()));
            StringBuilder stringBuilder = new StringBuilder();
            String lines = null;
            //将内容写入StringBuilder中
            while ((lines = in .readLine()) != null) {
                lines = new String(lines.getBytes("UTF-8"));
                stringBuilder.append(lines);
            }
            in .close();
            Log.e("StringBuidler的值", stringBuilder.toString());
            showToast(stringBuilder.toString());
        } catch (IOException e) {
            e.printStackTrace();
        }

    }