Play framework Web Service client（WS调用远程服务器接口）

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package utils;import java.util.HashMap;import java.util.Map;import play.libs.WS;import play.libs.WS.HttpResponse;import com.google.gson.JsonElement;public class GoGoalAPI {private static String URL = "";private static String APPKEY = "";private static String SECURITY = "";/*** 通过POST方式调用远程接口* @param url 请求路径* @param params 参数* @return*/public static JsonElement requestByPost(String url, Map<String, String> params){url = "v1/"+url;    long timeStamp = System.currentTimeMillis() / 1000;    if(params == null){    params = new HashMap<String, String>();    }params.put("app_key", APPKEY);params.put("time_stamp", String.valueOf(timeStamp));String sign = getSign(APPKEY, SECURITY, timeStamp, params, url, "POST");params.put("sign", sign);HttpResponse ws = WS.url(URL+url).setParameters(params).post();JsonElement json = ws.getJson();return json;}/*** 通过GET方式调用远程接口* @param url 请求路径* @param params 请求参数* @return*/public static JsonElement requestByGet(String url, Map<String, String> params){url = "v1/"+url;long timeStamp = System.currentTimeMillis() / 1000;if(params == null){params = new HashMap<String, String>();}params.put("app_key", APPKEY);params.put("time_stamp", String.valueOf(timeStamp));String sign = getSign(APPKEY, SECURITY, timeStamp, params, url, "GET");params.put("sign", sign);HttpResponse ws = WS.url(URL+url).setParameters(params).get();JsonElement json = ws.getJson();return json;}/*** 签名* @param appKey* @param appSecret* @param timeStamp* @param params* @param url* @param requestMethod* @return*/private static String getSign(String appKey, String appSecret, Long timeStamp, Map<String, String> params, String url, String requestMethod) {        Map paramsMap = new HashMap();        if (params != null) {        paramsMap.putAll(params);        }        paramsMap.put("app_key", appKey);        paramsMap.put("time_stamp", timeStamp.toString());        paramsMap.remove("sign");        SignHelper.codePayValue(paramsMap);        try {            return SignHelper.makeSign(requestMethod, url, paramsMap, appSecret);        } catch (Exception e) {           e.printStackTrace();        }        return null;    }}
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