java HttpClient 访问webservice并解析返回json数据

关于webservice的普及就不多说了，直接进入主题吧。

1.导包

        
            org.apache.httpcomponents
            httpclient
            4.5.6
        

        
        
            jaxen
            jaxen
            1.1.6
        

2.访问webservice

2.1访问

/**
     * 发起webservice请求
     * @param url
     * @param soap
     * @param SOAPAction
     * @return
     */
    public static String doPostSoap(String url, String soap, String SOAPAction) {
        //请求体
        String retStr = "";
        // 创建HttpClientBuilder
        HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();
        // HttpClient
        CloseableHttpClient closeableHttpClient = httpClientBuilder.build();
        HttpPost httpPost = new HttpPost(url);
        //  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(soap,
                    Charset.forName("UTF-8"));
            httpPost.setEntity(data);
            CloseableHttpResponse response = closeableHttpClient
                    .execute(httpPost);
            HttpEntity httpEntity = response.getEntity();
            if (httpEntity != null) {
                // 打印响应内容
                retStr = EntityUtils.toString(httpEntity, "UTF-8");
                System.err.println("response:" + retStr);
            }
            // 释放资源
            closeableHttpClient.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return retStr;
    }

2.2 测试

public static void main(String[] args){
        String url = "http://192.168.1.3:58080";
        //请求体
        String soap = "" +
                "" +
                "    " +
                "        " +
                "            12273" +
                "        " +
                "    " +
                "";
        String res = doPostSoap(url,soap,"");
        System.out.println(res);
    }

 返回数据：

    
        
            { "code":0, "message":"success", "data":[ { "card_id":"12273", "amount":"10.00", "trans_time":"2018-11-20 14:07:28", "status":"1" },{ "card_id":"12273", "amount":"10.00", "trans_time":"2018-11-19 14:55:54", "status":"0" },{ "card_id":"12273", "amount":"10.00", "trans_time":"2018-11-17 23:25:50", "status":"0" },{ "card_id":"12273", "amount":".01", "trans_time":"2018-11-17 16:19:03", "status":"0" },{ "card_id":"12273", "amount":".01", "trans_time":"2018-11-16 20:49:02", "status":"0" } ] }
        
    

3.解析webservice返回信息

3.1解析

/**
     * 解析webservice的返回结果
     * @param str xml内容
     * @param nodeName 需要获取的正文内容节点名
     * @return
     */
    public static String getWebservicesBody(String str,String nodeName){
        String s = "";
        try {
            Document doc = DocumentHelper.parseText(str);
            DefaultXPath xpath = new DefaultXPath("//"+nodeName);
           //下面的wsdl文件地址需要自己更改，返回数据中一般都有 
xpath.setNamespaceURIs(Collections.singletonMap("ns1","http://192.168.1.3:58080/BankYktWebSrv.wsdl"));

            List list = xpath.selectNodes(doc);
            Iterator iterator = list.iterator();
            while (iterator.hasNext()) {
                Element node = (Element) iterator.next();
                s = node.getText();
            }
        }catch (Exception e){
            e.printStackTrace();
        }
        System.err.println("Webservices result:"+s);
        return s;
    }

3.2测试

个人习惯转json

public static void main(String[] args){
        String url = "http://192.168.1.3:58080";
        //请求体
        String soap = "" +
                "" +
                "    " +
                "        " +
                "            12273" +
                "        " +
                "    " +
                "";
        String res = doPostSoap(url,soap,"");
        String formatStr = getWebservicesBody(res,"result");
        //System.out.println(formatStr);
        JSONObject json = JSONObject.parseObject(formatStr);
        System.out.println(json);
    }

测试结果图

error输出的是获取result节点的数据。

下面是转json格式的数据。

json我用的是阿里巴巴那个：com.alibaba.fastjson.JSONObject