Java HttpClient Post多层json格式参数

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package ...

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

public class HttpWeiXinMessage {
   public static String WeiXinMessage(String url,Map<String,String> params) throws ClientProtocolException, IOException{
       HttpClient httpClient = new DefaultHttpClient();
       HttpPost httpPost = new HttpPost(url);
       httpPost.addHeader("Content-Type","application/x-www-form-urlencoded;charset=utf-8");//请求头
       /*方法一:一层json*/
       //StringEntity stringEntity = new StringEntity(data,"UTF-8");
       //httpPost.setEntity(stringEntity);//请求主体
       /*方法二*:多层json*/
       HttpWeiXinMessage.setPostData(httpPost, params);

       HttpResponse httpResponse = httpClient.execute(httpPost);//发送请求
       HttpEntity httpEntity = httpResponse.getEntity();//获取请求返回体
       String backResult = EntityUtils.toString(httpEntity,"UTF-8");//请求返回结果

       if(httpResponse != null){
          try{
            EntityUtils.consume(httpResponse.getEntity());
            }catch(IOException e){
               e.printStackTrace();
            }
       }//释放资源

       return backResult;

   }

   //设置请求参数
   private static void setPostData(HttpPost httpPost, Map<String,String> params){
       /*另外一种设置请求参数方法*/
       List<NameValuePair> list = new ArrayList<NameValuePair>();
       for (Map.Entry<String, String> entry : params.entrySet()) {
           list.add(new BasicNameValuePair(entry.getKey(),entry.getValue()));
       }
       HttpEntity httpEntity = null;
       try {
           httpEntity = new UrlEncodedFormEntity(list, "UTF-8");
       } catch (UnsupportedEncodingException e) {
           e.printStackTrace();
       }
       httpPost.setEntity(httpEntity);//设置请求主体
   }

   //传递Map<String,Strnig> params参数格式
    Map<String, Strnig> map = new LinkedHashMap<String, String>();
   map.put("contexcode", "log");
   map.put("source", "weixin");
   map.put("form", "WeChat");
   map.put("messageId", "jjtz");
   map.put("data", "{'touser':" + amv.getOpenId() + ",'data':{'first': {'value':'qjtz','color':'#0'}," +
   "'keyword1':{'value':'"+realName+"','color':'#0'},'keyword2': {'value':'"+phone+"','color':'#173177'}," +
    "'remark': {'value':'"+senderAddress+"','color':'#173177'}}}");
}

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