请求webService的几种方式

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最新推荐文章于 2024-01-15 20:18:20 发布

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分类专栏： java，webservice 文章标签： xml web service

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本文提供了两种使用Java发送HTTP POST请求的方法：一种是通过HttpURLConnection发送XML格式的数据；另一种是利用HttpClient库发送SOAP请求。

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第一种，使用HttpURLConnection，post请求。需要传入路径以及xml报文，返回结果报文。

public String sendPost(String url, String param) {
        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        OutputStream ous = null;
        try {
            URL realUrl = new URL(url);
            HttpURLConnection conn = (HttpURLConnection) realUrl.openConnection();
            conn.setRequestMethod("POST");
            conn.setAllowUserInteraction(true);
            conn.setRequestProperty("content-type", "application/xml");
            conn.setDoOutput(true);
            conn.setDoInput(true);
            ous = conn.getOutputStream();
            ous.write(param.getBytes());
            ous.flush();
            in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        }catch (Exception e) {
            e.printStackTrace();
        }
        finally{
            try{
                if(ous!=null){
                   ous.close();
                }
                if(in!=null){
                    in.close();
                }
            }
            catch(IOException ex){
                ex.printStackTrace();
            }
        }
        return result;
   }

第二种，使用client方式，post请求，我使用的是 httpclient-cache-4.1.2.jar，httpcore-4.3.jar，httpmime-4.3.1.jar。

public static String doPostSoap(String postUrl, String soapXml, String soapAction) {
         String retStr = "";
         // 创建HttpClientBuilder
         HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();
         // HttpClient
         CloseableHttpClient closeableHttpClient = httpClientBuilder.build();
         HttpPost httpPost = new HttpPost(postUrl);
                 // 设置请求和传输超时时间
         RequestConfig requestConfig = RequestConfig.custom()
                 .setSocketTimeout(socketTimeout)
                 .setConnectTimeout(connectTimeout).build();
         httpPost.setConfig(requestConfig);
         try {
             httpPost.setHeader("Content-Type", "text/xml;charset=UTF-8");
             httpPost.setHeader("SOAPAction", soapAction);
             StringEntity data = new StringEntity(soapXml,Charset.forName("UTF-8"));
             httpPost.setEntity(data);
             CloseableHttpResponse response = closeableHttpClient.execute(httpPost);
             HttpEntity httpEntity = response.getEntity();
             if (httpEntity != null) {
                 retStr = EntityUtils.toString(httpEntity, "UTF-8");
                 System.out.println(retStr);
             }
             // 释放资源
             closeableHttpClient.close();
         }catch (Exception e) {
         }
         return retStr;
     }
}