httpclient 3.1和4.1 请求的区别

最新推荐文章于 2023-12-18 22:36:29 发布

最新推荐文章于 2023-12-18 22:36:29 发布 · 355 阅读

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#java #http #httpclient

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本文详细对比了HTTP客户端3.1与4.1在进行POST请求时的不同实现方式，并通过代码示例展示了如何使用这两个版本的库来模拟Web服务请求。

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Httpclient 3.1和httpclient 4.1 在post请求中的不同。
下面的示例将httpclient请求模拟webservices请求。

3.1 包名：commons-httpclient-3.1.jar


  public static EnvelopeDocument call(String soapString, String endpoint, int timeout)
        throws SOAException
    {
        EnvelopeDocument resDoc = null;
        PostMethod post = null;
        HttpClient httpclient = new HttpClient();
        try
        {
            HttpClientParams params = new HttpClientParams();
            params.setSoTimeout(timeout * 1000);
            httpclient.setParams(params);
            post = new PostMethod(endpoint);
            org.apache.commons.httpclient.methods.RequestEntity entity = new StringRequestEntity(soapString, "text/xml", "UTF-8");
            post.setRequestEntity(entity);
            int result = httpclient.executeMethod(post);
            String res;
            if(result != 200)
            {
                res = post.getResponseBodyAsString();
                throw new SOAException(ErrorCode.CALL_WEB_SERVICE_ERROR, "Web Service Server returns HTTP code " + result + "\n" + res);
            }
            res = post.getResponseBodyAsString();
            try
            {
                resDoc = org.xmlsoap.schemas.soap.envelope.EnvelopeDocument.Factory.parse(res);
            }
            catch(XmlException xe)
            {
                throw new SOAException(ErrorCode.PARSE_RESPONSE_XML_ERROR, "Parsing web service response soap message error", xe);
            }
        }
        catch(SOAException e)
        {
            e.printStackTrace();
            throw e;
        }
        catch(Exception e)
        {
            e.printStackTrace();
            throw new SOAException(ErrorCode.CALL_WEB_SERVICE_ERROR, "call web service error" + e.getMessage(), e);
        }
        return resDoc;
    }

4.1 包名：httpclient-4.1.jar


public static String requestWebservice(String url, String xmlParam)
			throws ClientProtocolException, IOException {
		Validate.notNull(url, "请求url");
		Validate.notNull(xmlParam, "符合webservice标准的xml字符串");

		String responseContent = "";

		HttpClient httpClient = new DefaultHttpClient();
		byte[] b = xmlParam.getBytes("utf-8");
		HttpPost httpPost = new HttpPost(url);
		if (url.indexOf("RushRepairService") != -1) {
			b = xmlParam.getBytes("GBK");
		}
		InputStream is = new ByteArrayInputStream(b, 0, b.length);
		HttpEntity re = new InputStreamEntity(is, b.length);
		httpPost.setEntity(re);

		HttpResponse response = httpClient.execute(httpPost);

		if (200 != response.getStatusLine().getStatusCode()) {
			throw new RuntimeException("http返回状态"
					+ response.getStatusLine().getStatusCode());
		}

		HttpEntity entity = response.getEntity();

		String inputLine = "";
		InputStreamReader in = new InputStreamReader(entity.getContent());
		BufferedReader reader = new BufferedReader(in);
		while ((inputLine = reader.readLine()) != null) {
			responseContent += inputLine;
		}
		reader.close();

		httpClient.getConnectionManager().shutdown();
		return responseContent;
	}