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

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);

4000
}
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;
}
}