httpclient post请求例子(无参数名与带参数名的例子)，多线程并发处理

版本：4.1

• 带参数名的情况

    HttpClient httpClient = new DefaultHttpClient(); 
    HttpPost httpPost = new HttpPost(url);
//  httpPost.setHeader("Accept-Encoding", "gzip,deflate");//表示返回的数据是压缩的zip格式
    String postParam = "";//请求的参数内容
    List<NameValuePair> nvps = new ArrayList<NameValuePair>();
    nvps.add(new BasicNameValuePair("data", postParam));
    httpPost.setEntity(new UrlEncodedFormEntity(nvps,"utf-8"));
    HttpResponse response = httpClient.execute(httpPost);
    HttpEntity entity = response.getEntity();
    if (response.getStatusLine().getStatusCode() == 200) {if (entity.getContentEncoding().toString().equalsIgnoreCase("Content-Encoding: gzip")) {
                response.setEntity(new GzipDecompressingEntity(response.getEntity())); //对zip进行解压
                entity = response.getEntity();
           }
           String responseContent = EntityUtils.toString(entity);
           System.out.println("responseContent: \n" + responseContent);
   }
}

• 无参数名的情况

　　 HttpClient httpClient = new DefaultHttpClient();
    HttpPost httpPost = new HttpPost(url);
//  httpPost.setHeader("Accept-Encoding", "gzip,deflate");//表示返回的数据是压缩的zip格式
    String postParam = "";//请求的参数内容
    StringEntity paramEntity = new StringEntity(postParam);//无参数名，只是参数内容
    httpPost.setEntity(paramEntity);
    HttpResponse response = httpClient.execute(httpPost);
    HttpEntity entity = response.getEntity();
    if (response.getStatusLine().getStatusCode() == 200) {if (entity.getContentEncoding().toString().equalsIgnoreCase("Content-Encoding: gzip")) {
                response.setEntity(new GzipDecompressingEntity(response.getEntity())); //对zip进行解压
                entity = response.getEntity();
           }
           String responseContent = EntityUtils.toString(entity);
           System.out.println("responseContent: \n" + responseContent);
   }
}

• httpEntity的类结构图

Httpclient并发处理处理：主要改变Httpclient对象的生成

    /**
     * 适合多线程的HttpClient,用httpClient4.2.1实现
     * @return DefaultHttpClient
     */
    public static DefaultHttpClient getHttpClient()
    {
        // 设置组件参数, HTTP协议的版本,1.1/1.0/0.9
        HttpParams params = new BasicHttpParams();
        HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
        HttpProtocolParams.setUserAgent(params, "HttpComponents/1.1");
        HttpProtocolParams.setUseExpectContinue(params, true);      

        //设置连接超时时间
        int REQUEST_TIMEOUT = 60*1000;  //设置请求超时60秒钟
        int SO_TIMEOUT = 60*1000;       //设置等待数据超时时间60秒钟
        //HttpConnectionParams.setConnectionTimeout(params, REQUEST_TIMEOUT);
        //HttpConnectionParams.setSoTimeout(params, SO_TIMEOUT);
        params.setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, REQUEST_TIMEOUT);
        params.setParameter(CoreConnectionPNames.SO_TIMEOUT, SO_TIMEOUT);   

        //设置访问协议
        SchemeRegistry schreg = new SchemeRegistry();
        schreg.register(new Scheme("http",80,PlainSocketFactory.getSocketFactory()));
        schreg.register(new Scheme("https", 443, SSLSocketFactory.getSocketFactory()));         

        //多连接的线程安全的管理器
        PoolingClientConnectionManager pccm = new PoolingClientConnectionManager(schreg);
        pccm.setDefaultMaxPerRoute(20); //每个主机的最大并行链接数
        pccm.setMaxTotal(100);          //客户端总并行链接最大数      

        DefaultHttpClient httpClient = new DefaultHttpClient(pccm, params);
        return httpClient;
    }