1、httpclient验证问题
webservice需要验证时，直接发送请求会返回HTTP/1.1 401 Unauthorized 错误
这时候需要设置：
Credentials defaultcreds = new UsernamePasswordCredentials("username", "password");
httpClient.getState().setCredentials(AuthScope.ANY, defaultcreds);
注意password为明文
2、Unsupported xstream 错误
这个需要进行设置请求类型，一般请求如下设置，此为post请求：
byte[] b = soapRequestData.getBytes("UTF-8");
InputStream is = new ByteArrayInputStream(b,0,b.length);
RequestEntity re = new InputStreamRequestEntity(is,b.length,"application/xop+xml; charset=UTF-8; type=\"text/xml\"");
postMethod.setRequestEntity(re);
3、Unbuffered entity enclosing request can not be repeated.问题
一般来说，webservice需要验证时，在httpclient请求之前需要加上上面的设置，然后使用上面的访问进行post访问时会发生此错误
此时需要将设置改为如下：
StringRequestEntity requestEntity = new StringRequestEntity(soapRequestData,"application/xop+xml; charset=UTF-8; type=\"text/xml\"","UTF-8");
postMethod.setRequestEntity(requestEntity);
因此使用httpclient访问需要验证的webservice时，具体代码如下
public static void post() throws Exception {HttpClient httpClient = new HttpClient();//post请求内容String soapRequestData ="postbody";// 构造HttpClient的实例Credentials defaultcreds = new UsernamePasswordCredentials("username", "password");httpClient.getState().setCredentials(AuthScope.ANY, defaultcreds);//webservice服务请求路径String url = "";PostMethod postMethod = new PostMethod(url);//使用系统提供的默认的恢复策略postMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,new DefaultHttpMethodRetryHandler());StringRequestEntity requestEntity = new StringRequestEntity(soapRequestData,"application/xop+xml; charset=UTF-8; type=\"text/xml\"","UTF-8");postMethod.setRequestEntity(requestEntity);// 执行postMethodint statusCode = httpClient.executeMethod(postMethod);// HttpClient对于要求接受后继服务的请求，System.out.println("statusCode is "+statusCode);if (statusCode != HttpStatus.SC_OK) {System.err.println("Method failed: "+ postMethod.getStatusLine());}// 读取内容byte[] responseBody = postMethod.getResponseBody();// 处理内容System.out.println(new String(responseBody,"utf-8"));}
