java 调用webService接口

最新推荐文章于 2024-10-11 18:06:40 发布

milieu-mills

最新推荐文章于 2024-10-11 18:06:40 发布

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分类专栏：个人学习整合文章标签： java 调用webService接口

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本文介绍了两种使用HTTP客户端调用WebService接口的方法。一种是通过直接设置URL和POST请求方式发送SOAP消息；另一种则是利用PoolingHttpClientConnectionManager进行连接管理和HttpPost发送请求。

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由于项目中使用webService接口，因此学习了下如何调用webService接口。

一、使用httpClient调用webService接口：

   public static String executeWebService(String urls,String soapXml) throws IOException {
           //设置url，不是WSDL地址
           //URL url = new URL("http://127.0.0.1:8080/Service/ServiceHello");
           URL url = new URL(urls);
           //通过url获取连接
           HttpURLConnection connection = (HttpURLConnection) url.openConnection();

//设置请求类型：POST请求
           connection.setRequestMethod("POST");
           //设置数据格式，我这里是xml类型
           connection.setRequestProperty("content-type", "text/xml;charset=utf-8");
           connection.setDoInput(true);
           connection.setDoOutput(true)；

//设置连接超时
           connection.setConnectTimeout(3000);
//第四步：组织SOAP数据，发送请求
           OutputStream os = connection.getOutputStream();
           os.write(soapXml.getBytes());
           //获取响应信息
           int responseCode = connection.getResponseCode();
           //检查是否请求成功,判断是否响应成功
           if(HttpURLConnection.HTTP_OK == responseCode){//
               InputStream is = connection.getInputStream();
               InputStreamReader inputStream= new InputStreamReader(is);
               BufferedReader buffered= new BufferedReader(isr);
               StringBuilder stringBuilder= new StringBuilder();
               String result= null;
               while(null != (result= buffered.readLine())){
                   stringBuilder.append(result);
               }
               is.close();
               inputStream.close();
               buffered.close();
               //返回结果xml字符串
               return sb.toString();
           }
           os.close();
           return null;
   }

二、使用另一种httpClient：

   public static String execute(String uri,String requestXml) throws Exception {
       long startTime = System.currentTimeMillis();
       PoolingHttpClientConnectionManager cm = null;

       CloseableHttpClient httpClient = null;
HttpEntity httpEntity = null;
HttpRequestBase request = null;
String responseBody = "";
   cm = new PoolingHttpClientConnectionManager();
   //路由最大连接数
   cm.setDefaultMaxPerRoute(2);
   //总最大连接
   cm.setMaxTotal(2);
   //得到连接池
   httpClient = HttpClients.custom().build();

// HashMap<String, String> headers = new HashMap<String, String>();
request=new HttpPost(uri);
//request.addHeader("User-Agent", "Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.2.6) Gecko/20100625Firefox/3.6.6 Greatwqs");
//request.addHeader("Accept","text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
//请求头：接受语言环境
// request.addHeader("Accept-Language","zh-cn,zh;q=0.5");
//请求头：保持连接
// request.addHeader("connection", "close");
       //request.addHeader("connection", "Keep-Alive");
       //request.addHeader("user-agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
CloseableHttpResponse httpResponse;
//TODO强制转换成POST设置请求参数
// String st=new String(requestXml.getBytes("iso8859-1"),"utf-8");
HttpPost post=(HttpPost)request;
//构建消息实体

StringEntity entity=new StringEntity(requestXml,"utf-8");
//entity.setContentEncoding("utf-8");
//entity.setContentType("application/xml");
//设置请求头
post.addHeader("Content-type", "text/xml");
//ByteArrayEntity entity = new ByteArrayEntity(requestXml.getBytes("utf-8"));
//设置请求实体
post.setEntity(entity);
       try {
           httpResponse = httpClient.execute(post);
   httpEntity = httpResponse.getEntity();
   if (httpEntity != null) {
   responseBody = EntityUtils.toString(httpEntity);
   }
       } catch (Exception e) {
           e.printStackTrace();
   if(request != null){
       request.abort();
   }
   throw new Exception("请求异常："+e.getMessage());
   } finally {
   if (httpEntity != null) {
   try {
   EntityUtils.consumeQuietly(httpEntity);
   } catch (Exception e) {
   throw new Exception("请求异常："+e.getMessage());
   }
   }
   }
   return null;
   }