java httpclient 读取sharepoint restful web service

使用java读取sharepoint 的web service 有点麻烦，麻烦的地方主要是用户验证。 sharepoint主要用的是NTLM验证方式，微软在2008年之前从来没有公布任何关于NTLM验证的文档，所以JAVA对NTLM的支持不如.net

好在httpclient 对NTLM 有一些支持，但是官方不对这段代码负责，请看这里http://hc.apache.org/httpcomponents-client-ga/ntlm.html

一段比较完整的代码请看这里

PrintWriter out = ServletActionContext.getResponse().getWriter();
			DefaultHttpClient httpclient = new DefaultHttpClient();
			httpclient.getCredentialsProvider().setCredentials(
				    new AuthScope("test.sharepoint", 80), 
				    new NTCredentials("userame", "password", "MYSERVER", "domain"));
			
			ResponseHandler<String> responseHandler = new BasicResponseHandler();
			String smsURL = "http://test.sharepoint/_vti_bin/listdata.svc/testList";
			try {
				HttpGet httpget = new HttpGet(smsURL);
				httpget.setHeader("accept", "application/json");
				String responseBody2 = StringUtils.chomp(httpclient.execute(
						httpget, responseHandler));
				System.out.println(responseBody2);
				out.print(responseBody2);
			} catch (ClientProtocolException e) {
				log.error(e, e);
			} catch (IOException e) {
				log.error(e, e);
			} finally {
				httpclient.getConnectionManager().shutdown();
			}

稍微解释一下：httpget.setHeader("accept", "application/json"); 是为了让sharepoint 的web service 返回json的数据格式。 sharepoint 默认会返回atom 格式的数据。详情请阅读：http://msdn.microsoft.com/zh-cn/library/ff521587(v=office.14).aspx