HttpClient 请求方式

最新推荐文章于 2022-08-09 18:27:07 发布

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本文介绍了一个简单的HTTP请求示例，包括GET和POST两种方法。通过示例代码展示了如何使用DefaultHttpClient进行HTTP请求，并且详细说明了请求过程中的关键步骤。

使用client需要在build.gradle中添加

 useLibrary 'org.apache.http.legacy'

1.请求方法创建
new Thread(new Runnable() {
    @Override
    public void run() {
        postNews("top","c1885686ef47f19bcb45e39c4447e040");
    }
}).start();

2.详细请求
/**
 * post请求
 */
private void postNews(String type,String key) {

    HttpClient client=new DefaultHttpClient();

    HttpPost httpPost=new HttpPost(POSTURL);

    String result=null;

    try {
        //封装传递参数的集合
        ArrayList<NameValuePair> nameValuePair=new ArrayList<>();
        //往这个集合中添加你要传递的参数
        nameValuePair.add(new BasicNameValuePair("type",type));
        nameValuePair.add(new BasicNameValuePair("key",key));
        //创建传递参数封装
        UrlEncodedFormEntity entity=new UrlEncodedFormEntity(nameValuePair,"UTF-8");
        //将实体对象传入HttpHost
        httpPost.setEntity(entity);

        //调用第一步中创建好的实例
        HttpResponse httpResponse = client.execute(httpPost);

        //响应
        int statusCode = httpResponse.getStatusLine().getStatusCode();
        String reasonPhrase = httpResponse.getStatusLine().getReasonPhrase();

        if(200==statusCode){
            //得到返回的实体对象
            HttpEntity httpEntity=httpResponse.getEntity();

            InputStream inputStream=httpEntity.getContent();

            ByteArrayOutputStream byteArrayOutputStream=new ByteArrayOutputStream();

            int len=0;

            byte[] buffer=new byte[1024];

            while((len=inputStream.read(buffer))!=-1){

                byteArrayOutputStream.write(buffer,0,len);

            }

            result=byteArrayOutputStream.toString();

            System.out.println(result);

            pauseData(result);
              }


    } catch (Exception e) {
        e.printStackTrace();
    }

}

/**
 * get请求
 */
private void getNews() {

    //接受字符串
    StringBuffer result=new StringBuffer();

    //创建httpclient对象
    HttpClient client= new DefaultHttpClient();

    HttpGet httpGet=new HttpGet(GETURL);

    try {

        //发起请求,拿到HttpResponse对象
        HttpResponse httpResponse=client.execute(httpGet);

        //得到响应码,和响应消息
        int statusCode = httpResponse.getStatusLine().getStatusCode();
        String reasonPhrase = httpResponse.getStatusLine().getReasonPhrase();

        if(200==statusCode){
            //得到返回的实体类
            HttpEntity entity = httpResponse.getEntity();

            //得到实体内容
            InputStream inputStream = entity.getContent();

            BufferedReader bufferedReader=new BufferedReader(new InputStreamReader(inputStream));

            String line=null;

            while((line=bufferedReader.readLine())!=null){
                result.append(line);
            }

            System.out.println(result.toString());

        }

    } catch (Exception e) {
        e.printStackTrace();
    }



}