1：輔助類

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：資料類：

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：請求介面

@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 "頁面";
    }

轉載於：https://www.cnblogs.com/MedivhQ/p/4101262.html