HttpPost请求Elasticsearch

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本文介绍了一个用于从Elasticsearch获取和检索数据的Java实用工具类。该工具类包括两个主要功能：一是通过GET请求获取索引模式信息，二是通过POST请求进行数据搜索。文章详细展示了如何设置HTTP请求头、构建请求实体以及处理响应结果。

package com.train.monitoring.Reptile_mobile_monitoring.util;

import java.io.IOException;

import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

import com.alibaba.fastjson.JSONObject;

public class ESConfig {

   public String get(){
       DefaultHttpClient httpClient = new DefaultHttpClient();
       String url="http://101.236.57.141:5601/api/saved_objects/_find?type=index-pattern&per_page=10000";
   HttpGet httpGet = new HttpGet(url);

   httpGet.addHeader("Content-Type", "application/json;charset=utf-8");

   // 执行请求
   HttpResponse response=null;
   JSONObject jsonObject=null;
           try {
               response = httpClient.execute(httpGet);
               String json2 = EntityUtils.toString(response.getEntity(), "utf-8");
               jsonObject = JSONObject.parseObject(json2);
           } catch (ClientProtocolException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
           } catch (IOException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
           }

   // 打印执行结果
   System.out.println(jsonObject);

       return null;
   }


   public static JSONObject post(String url){
       DefaultHttpClient httpClient = new DefaultHttpClient();
       /**
       * curl -XPOST 'localhost:9200/bank/_search?pretty' -d '
'
       */
//   String url = "http://101.236.47.119:9200/redis-log-2018.07.26/doc/_search?pretty";
   HttpPost httpPost = new HttpPost(url);

   // 设置请求的header
   httpPost.addHeader("Content-Type", "application/json;charset=utf-8");
//   String param="{"+
//           "\"query\": { \"match_all\": {} },"+
//           "\"from\": 10,"+
//           "\"size\": 10"+
//           "}";
   String param="{"+
           "\"query\": { \"match_phrase\": {\"biztype\":\"排队的代理IP为:\"} },"+
           "\"from\": 1,"+
           "\"size\": 9000"+
           "}";
//   String param="{"+
//           " \"query\": {"+
//           " \"bool\": {"+
//           " \"should\": ["+
//           " { \"match\": { \"biztype\": \"排队的代理IP为:\" } }"+
//       //   " { \"match\": { \"address\": \"lane\" } }"+
//           " ]"+
//           " }"+
//           " }"+
//           "}";
   // 设置请求的参数
   JSONObject jsonParam = JSONObject.parseObject(param);


   StringEntity entity = new StringEntity(jsonParam.toString(), "utf-8");
   entity.setContentEncoding("UTF-8");
   entity.setContentType("application/json");
   httpPost.setEntity(entity);
   JSONObject jsonObject=null;
   try {

       // 执行请求
       HttpResponse response = httpClient.execute(httpPost);
       String json2 = EntityUtils.toString(response.getEntity(), "utf-8");
       jsonObject = JSONObject.parseObject(json2);
           } catch (Exception e) {
               e.printStackTrace();
           }

   // 打印执行结果
           return jsonObject;