大众点评API获取某坐标周边酒店信息

1：辅助类

package com.tgb.util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpMethod;
import org.apache.commons.httpclient.URIException;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.params.HttpClientParams;
import org.apache.commons.httpclient.util.URIUtil;
import org.apache.commons.lang.StringUtils;


public class DzdpUtil
{

	public static String sign(String appKey, String secret,
			Map<String, String> paramMap)
	{
		String[] keyArray = paramMap.keySet().toArray(new String[0]);
		Arrays.sort(keyArray);
		StringBuilder stringBuilder = new StringBuilder();
		stringBuilder.append(appKey);
		for (String key : keyArray)
		{
			stringBuilder.append(key).append(paramMap.get(key));
		}
		stringBuilder.append(secret);
		String codes = stringBuilder.toString();

		String sign = org.apache.commons.codec.digest.DigestUtils.shaHex(codes)
				.toUpperCase();
		return sign;
	}

	public static String getQueryString(String appKey, String secret,
			Map<String, String> paramMap)
	{
		String sign = sign(appKey, secret, paramMap);

		StringBuilder stringBuilder = new StringBuilder();
		stringBuilder.append("appkey=").append(appKey).append("&sign=")
				.append(sign);
		for (Entry<String, String> entry : paramMap.entrySet())
		{
			stringBuilder.append('&').append(entry.getKey()).append('=')
					.append(entry.getValue());
		}
		String queryString = stringBuilder.toString();
		return queryString;
	}


	public static String requestApi(String apiUrl, String appKey,
			String secret, Map<String, String> paramMap)
	{
		String queryString = getQueryString(appKey, secret, paramMap);
		StringBuffer response = new StringBuffer();
		HttpClientParams httpConnectionParams = new HttpClientParams();
		httpConnectionParams.setConnectionManagerTimeout(1000);
		HttpClient client = new HttpClient(httpConnectionParams);
		HttpMethod method = new GetMethod(apiUrl);
		try
		{
			if (StringUtils.isNotBlank(queryString))
			{
				String encodeQuery = URIUtil.encodeQuery(queryString, "UTF-8");
				method.setQueryString(encodeQuery);
			}
			client.executeMethod(method);
			BufferedReader reader = new BufferedReader(new InputStreamReader(
					method.getResponseBodyAsStream(), "UTF-8"));
			String line = null;
			while ((line = reader.readLine()) != null)
			{
				response.append(line).append(
						System.getProperty("line.separator"));
			}
			reader.close();
		} catch (URIException e)
		{
		} catch (IOException e)
		{
		} finally
		{
			method.releaseConnection();
		}
		return response.toString();
	}

}

2：数据类：

package com.tgb.util;

public class DzdpData
{
	public static final String APPKEY = "xx";
	
	public static final String SECRET = "xx";
	
	public static final String CITY = "";
	
	public static final String CATEGORY = "酒店";
	
	public static final String CharSet = "UTF-8";
}

3：请求接口

@RequestMapping(value="/address")
	public String getMap(HttpServletRequest request ,Model model) throws ParseException, IOException
	{
		String x = "136.11111";
                String y = "26.36845";

                String apiUrl = "http://api.dianping.com/v1/business/find_businesses";
		String appKey = DzdpData.APPKEY;
		String secret = DzdpData.SECRET;
                Map<String, String> paramMap = new HashMap<String, String>();
                paramMap.put("latitude", x);
                paramMap.put("longitude",y);
                paramMap.put("category", DzdpData.CATEGORY);
                paramMap.put("limit", "20");
                paramMap.put("offset_type", "0");
                paramMap.put("sort", "7");
                paramMap.put("format", "json");
                paramMap.put("radius", "2000");
        
                String json = DzdpUtil.requestApi(apiUrl, appKey, secret, paramMap);
		
		model.addAttribute("json",json);
		
		return "页面";
	}