HOWTO use httpcomponet example

private void promotion_price_situation_four(Extraction extraction,
String html, CrawlResult product) throws IOException,
ClientProtocolException {
String http_response=null;
//进行ajax http请求促俏价格 situation four
//http://detail.tmall.com/item.htm?id=2223769663&is_b=1&spm=1008.1000032.1000012.4
String ajax_request_url = null;
try {
Pattern regex = Pattern.compile("<textarea id=\"J_VipPriceData\"[\\s\\S]*?shopVipUrl[\\s\\S]*?\"([\\s\\S]*?)\",[\\s\\S]*?</textarea>");
Matcher regexMatcher = regex.matcher(html);
if (regexMatcher.find()) {
ajax_request_url = regexMatcher.group(1);
}
} catch (PatternSyntaxException ex) {
// Syntax error in the regular expression
logger.warn(ex.toString());
}
logger.debug("ajax_request_url");
logger.debug(ajax_request_url);
if(ajax_request_url!=null){
ajax_request_url=ajax_request_url.trim();

HttpClient httpclient = new DefaultHttpClient();
try {
// HttpGet httpget = new HttpGet("http://tbskip.taobao.com/json/promotion_info_list.htm?price=45.80&seller_id=105152347&buyer_id=0");
String s="http://tbskip.taobao.com/json/promotion_info_list.htm?price=219.00&seller_id=728292607&buyer_id=0";
logger.debug("====");
logger.debug(ajax_request_url);
HttpGet httpget = new HttpGet(ajax_request_url);
HttpParams params = new SyncBasicHttpParams();
params
.setIntParameter(CoreConnectionPNames.SO_TIMEOUT, 5000)
.setIntParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 10000)
.setIntParameter(CoreConnectionPNames.SOCKET_BUFFER_SIZE, 8 * 1024)
.setBooleanParameter(CoreConnectionPNames.STALE_CONNECTION_CHECK, false)
.setBooleanParameter(CoreConnectionPNames.TCP_NODELAY, true)
.setParameter(CoreProtocolPNames.USER_AGENT, "HttpComponents/1.1");
httpget.setParams(params);
System.out.println("executing request " + httpget.getURI());

// Create a response handler
ResponseHandler<String> responseHandler = new BasicResponseHandler();

String responseBody = httpclient.execute(httpget, responseHandler);
System.out.println("----------------------------------------");
System.out.println(responseBody);
System.out.println("----------------------------------------");
http_response=responseBody;
}catch(Exception ex)
{
logger.warn(ex.toString());
}
finally {
// When HttpClient instance is no longer needed,
// shut down the connection manager to ensure
// immediate deallocation of all system resources
httpclient.getConnectionManager().shutdown();
}
if(http_response.trim().endsWith(";")==false)
{
http_response=http_response.trim()+";";
}
logger.debug(http_response.trim());

String promotion_price = null;
String json_string="var shopVipData={\"msg\":\"\",promo:[{\"type\":\"普通会员\",\"price\":\"45.75\"},{\"type\":\"高级会员\",\"price\":\"45.71\"},{\"type\":\"VIP会员\",\"price\":\"45.34\"},{\"type\":\"至尊VIP\",\"price\":\"44.88\"}]};";
json_string=http_response;
logger.debug(json_string);
String js_string="var price;for(var i=0;i<=shopVipData.promo.length-1;i++){if(shopVipData.promo[i].type=='普通会员'){price=shopVipData.promo[i].price;}}";

ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByName("JavaScript");
Compilable compilable = (Compilable) engine;
CompiledScript script = null;
Bindings binds = engine.createBindings();
try {
script = compilable.compile(json_string+js_string);
script.eval(binds);
promotion_price=binds.get("price").toString();
logger.debug("=-----------------------------");

} catch (ScriptException e) {
e.printStackTrace();
}
this.is_add_promotion_price(extraction, product, promotion_price);

}
}