httpClient

使用httpClient访问网络数据 

在build.gradle文件中需要写
 useLibrary 'org.apache.http.legacy'
当同时使用httpUrlConnection和httpClient访问数据时
在用httpclient是会出现
         javax.net.ssl.SSLException: hostname in certificate didn't match:!= <*.sinaapp.com> OR <*.sinaapp.com> OR
      即     *主机名和证书里面的不匹配    的错误
  需要在请求前添加一行代码
 SSLSocketFactory.getSocketFactory().setHostnameVerifier(newAllowAllHostnameVerifier());

SSLSocketFactory.getSocketFactory().setHostnameVerifier(new AllowAllHostnameVerifier());

get请求

HttpClient client = new DefaultHttpClient();String path = "网络路径";HttpGet httpGet = new HttpGet(path);HttpResponse httpResponse = client.execute(httpGet);int statusCode = httpResponse.getStatusLine().getStatusCode();if (statusCode == 200){    InputStream inputStream = httpResponse.getEntity().getContent();

    }

post请求

//有一个请求的http客户端对象
HttpClient client = new DefaultHttpClient();

String path = "http://v.juhe.cn/toutiao/index";
//指定请求方式的对象
HttpPost httpPost = new HttpPost(path);

 //创建传递参数的集合....并且把传递的参数放到集合中
 List<BasicNameValuePair> params = new ArrayList<>();

params.add(new BasicNameValuePair("type","top"));
params.add(new BasicNameValuePair("key","597b4f9dcb50e051fd725a9ec54d6653"));

//创建一个请求实体内容的对象,,,,UrlEncodedFormEntity支持url编码,并且支持form格式
//list<? extends NameValuePair> params 要给服务器传递的参数,,,所有的参数需要放到集合里面,string encoding指定编码字符集

HttpEntity entity = new UrlEncodedFormEntity(params,"utf-8");
//http协议中,post请求方式,请求的参数是在请求的实体内容中....setEntity设置请求实体内容的对象
httpPost.setEntity(entity);

//执行post请求
HttpResponse httpResponse = client.execute(httpPost);

//获取
int statusCode = httpResponse.getStatusLine().getStatusCode();
if (statusCode == 200){
    //获取到响应的字节流
    InputStream inputStream = httpResponse.getEntity().getContent();

    }