httpClient实例

基于httpclient4.3.6写的测试客户端，使用PoolingHttpClientConnectionManager保证线程安全

public class TestHttpClient {

    /**
     *
     */
    @Test
    public void testGet() throws IOException {

        System.out.println("开始测试");
        PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();
        cm.setMaxTotal(100);
        CloseableHttpClient httpclient = HttpClients.custom()
                .setConnectionManager(cm)
                .build();

        try {
            HttpGet httpget = new HttpGet("http://localhost:8089/httpservice/httpService/testGet");
            CloseableHttpResponse response = httpclient.execute(httpget);
            try {
                InputStream is = response.getEntity().getContent();
                String result = getStreamAsString(is, "UTF-8");
                System.out.println(result);
            } finally {
                response.close();
                httpget.releaseConnection();
            }



            HttpPost httpPost = new HttpPost("http://localhost:8089/httpservice/httpService/testPost");
            List<NameValuePair> nvps = new ArrayList<NameValuePair>();
            nvps.add(new BasicNameValuePair("username", "vip"));
            nvps.add(new BasicNameValuePair("password", "secret"));
            httpPost.setEntity(new UrlEncodedFormEntity(nvps));
            CloseableHttpResponse response2 = httpclient.execute(httpPost);
            try {
                System.out.println(response2.getStatusLine());
                HttpEntity entity2 = response2.getEntity();
                // do something useful with the response body
                // and ensure it is fully consumed
                EntityUtils.consume(entity2);
            } finally {
                response2.close();
                httpPost.releaseConnection();
            }






        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            httpclient.close();
        };


    }

    private String getStreamAsString(InputStream is, String s) throws IOException {

        try {

            BufferedReader reader = new BufferedReader(new InputStreamReader(is, s), 8192);

            StringWriter writer = new StringWriter();



            char[] chars = new char[8192];

            int count = 0;

            while ((count = reader.read(chars)) > 0) {

                writer.write(chars, 0, count);

            }



            return writer.toString();

        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {

            if (is != null) is.close();

        }
        return "";
    }
}