HttpClient_Post方式提交json字符串

package com.gts.jsonPost;

import java.io.IOException;

import org.apache.http.client.ResponseHandler;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.entity.StringEntity;

import org.apache.http.impl.client.BasicResponseHandler;

import org.apache.http.impl.client.CloseableHttpClient;

import org.apache.http.impl.client.HttpClients;

public class JsonPost {

public static void main(String[] args) {

String url = "http://159.138.1.196:9200/gspoc/idealmoney_rt_result/_search";

//Post方式提交Json字符串，按照指定币种，指定时间点查询

String json1 = "{\"query\":{\"bool\":{\"must\":[{\"match_phrase\":{\"imtype\":\"LTCUS\"}},{\"match_phrase\":{\"rtdatetime\":1521164922000}}]}}}";

//Post方式提交json字符串，按照指定的币种和时间正序的方式获取前N条数据

String json2 = "{\"query\":{\"match\":{\"imtype\":\"LTCUS\"}},\"sort\":[{\"rtdatetime\":{\"order\":\"desc\"}}],\"size\":3}";

//Post方式提交Json字符串，按照指定币种，指定时间段查询

String json3 = "{\"query\":{\"bool\":{\"must\":[{\"match_phrase\":{\"imtype\":\"LTCUS\"}},{\"range\":{\"rtdatetime\":{\"gte\":1521164922000,\"lte\":1521164932000}}}]}}}";

String json = json2;

System.out.println(JsonPost.HttpPostWithJson(url, json));

}

public static String HttpPostWithJson(String url, String json) {

String returnValue = "这是默认返回值，接口调用失败";

CloseableHttpClient httpClient = HttpClients.createDefault();

ResponseHandler<String> responseHandler = new BasicResponseHandler();

try{

        //第一步：创建HttpClient对象

        httpClient = HttpClients.createDefault();

        //第二步：创建httpPost对象

        HttpPost httpPost = new HttpPost(url);

        //第三步：给httpPost设置JSON格式的参数

        StringEntity requestEntity = new StringEntity(json,"utf-8");

        requestEntity.setContentEncoding("UTF-8");           

        httpPost.setHeader("Content-type", "application/json");

        httpPost.setEntity(requestEntity);

      //第四步：发送HttpPost请求，获取返回值

      returnValue = httpClient.execute(httpPost,responseHandler); //调接口获取返回值时，必须用此方法

}

catch(Exception e)

{

e.printStackTrace();

}

finally {

      try {

httpClient.close();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

    }

//第五步：处理返回值

    return returnValue;

}

}

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