JsonResponseHandler.java

package weixin.popular.client;

import java.io.IOException;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.ResponseHandler;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import weixin.popular.util.JsonUtil;

public class JsonResponseHandler{

	private static Logger logger = LoggerFactory.getLogger(JsonResponseHandler.class);

	public static <T> ResponseHandler<T> createResponseHandler(final Class<T> clazz){
		return new JsonResponseHandlerImpl<T>(null,clazz);
	}

	public static class JsonResponseHandlerImpl<T> extends LocalResponseHandler implements ResponseHandler<T> {
		
		private Class<T> clazz;
		
		public JsonResponseHandlerImpl(String uriId, Class<T> clazz) {
			this.uriId = uriId;
			this.clazz = clazz;
		}

		@Override
		public T handleResponse(HttpResponse response)
				throws ClientProtocolException, IOException {
			int status = response.getStatusLine().getStatusCode();
            if (status >= 200 && status < 300) {
                HttpEntity entity = response.getEntity();
                String str = EntityUtils.toString(entity,"utf-8");
                logger.info("URI[{}] elapsed time:{} ms RESPONSE DATA:{}",super.uriId,System.currentTimeMillis()-super.startTime,str);
                return JsonUtil.parseObject(str, clazz);
            } else {
                throw new ClientProtocolException("Unexpected response status: " + status);
            }
		}
		
	}
}