httpclient 调用webservice

最新推荐文章于 2022-12-15 15:29:20 发布

小洋

最新推荐文章于 2022-12-15 15:29:20 发布

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文章标签： webservice soap string encoding exception byte

本文详细介绍了如何使用HttpClient库对WebService进行调用，包括所需jar包、具体流程及动态构造调用串的方法。

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使用HttpClient对Web Service调用

用到的jar包有：
    commons-codec-1.3.jar
    commons-httpclient-3.0.jar
    commons-logging-1.0.4.jar

具体流程大致这样：

String soapRequestData = "<?xml version=\"1.0\" encoding=\"utf-8\"?>" + 
        "<soap12:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap12=\"http://www.w3.org/2003/05/soap-envelope\">" + 
          "<soap12:Body>" + 
           " <qqCheckOnline xmlns=\"http://WebXml.com.cn/\">" + 
          "    <qqCode>349104641</qqCode>" + 
         "   </qqCheckOnline>" + 
        "  </soap12:Body>" + 
        "</soap12:Envelope>"; 
        
        System.out.println(soapRequestData); 


    //PostMethod postMethod = new PostMethod("http://www.webxml.com.cn/WebServices/WeatherWebService.asmx?wsdl"); 
    
    PostMethod postMethod = new PostMethod("http://www.webxml.com.cn/webservices/qqOnlineWebService.asmx?wsdl"); 

   // 然后把Soap请求数据添加到PostMethod中 


    byte[] b = soapRequestData.getBytes("utf-8"); 
    InputStream is = new ByteArrayInputStream(b,0,b.length); 
    RequestEntity re = new InputStreamRequestEntity(is,b.length,"application/soap+xml; charset=utf-8"); 
    postMethod.setRequestEntity(re); 
    
    //最后生成一个HttpClient对象，并发出postMethod请求 

    HttpClient httpClient = new HttpClient(); 
    int statusCode = httpClient.executeMethod(postMethod); 
    String soapResponseData =  postMethod.getResponseBodyAsString(); 
        
        
    System.out.print(soapResponseData);

动态构造调用串的话如下实现：

private String tns; 
    private String methodName; 
    private String wsdlLocation; 
    private String soapResponseData; 

private int invoke(Map<String, String> patameterMap) throws Exception { 
        PostMethod postMethod = new PostMethod(wsdlLocation); 
        String soapRequestData = buildRequestData(patameterMap); 

        byte[] bytes = soapRequestData.getBytes("utf-8"); 
        InputStream inputStream = new ByteArrayInputStream(bytes, 0, 
                bytes.length); 
        RequestEntity requestEntity = new InputStreamRequestEntity(inputStream, 
                bytes.length, "application/soap+xml; charset=utf-8"); 
        postMethod.setRequestEntity(requestEntity); 

        HttpClient httpClient = new HttpClient(); 
        int statusCode = httpClient.executeMethod(postMethod); 
        soapResponseData = postMethod.getResponseBodyAsString(); 
        return statusCode; 
    } 

    private String buildRequestData(Map<String, String> patameterMap) { 
        StringBuffer soapRequestData = new StringBuffer(); 
        soapRequestData.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>"); 
        soapRequestData 
                .append("<soap12:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap12=\"http://www.w3.org/2003/05/soap-envelope\">"); 
        soapRequestData.append("<soap12:Body>"); 
        soapRequestData.append("<" + methodName + " xmlns=\"" + tns + "\">"); 
        Set<String> nameSet = patameterMap.keySet(); 
        for (String name : nameSet) { 
            soapRequestData.append("<" + name + ">" + patameterMap.get(name) 
                    + "</" + name + ">"); 
        } 
        soapRequestData.append("</" + methodName + ">"); 
        soapRequestData.append("</soap12:Body>"); 
        soapRequestData.append("</soap12:Envelope>"); 

        return soapRequestData.toString(); 
    }