開發了一個獨立查詢儲存的系統,需要被其他系統訪問，記錄一下方法 也許以後會用到。很簡單的http請求和返回

package com.hz.contral;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang.StringUtils;
import org.apache.logging.log4j.core.util.JsonUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.hz.entity.Esentity;
import com.hz.entity.SoGoEntity;
import com.hz.entity.SoGoEntity;
import com.hz.entity.TrackBean;
import com.hz.service.ElasticsearchService;
import com.hz.service.HbaseService;
import com.hz.util.ConfigInfo;
import com.hz.util.PageUtils;

@Controller
public class ElasticsearchContral {

	
	
	//將查詢值返回
	@RequestMapping("/searchPageJson")
	public void searchPageJson(HttpServletRequest request,HttpServletResponse response, Model model) throws IOException {
		String searchName = request.getParameter("search");
		String pageNum = request.getParameter("number");

    
	        //放入需要返回的值
		Map<String, Object> returnMap=new HashMap<String, Object>();
		 //轉為json
		String jsonMap = JSON.toJSONString(returnMap,true); 
 
		response.setContentType("text/html;charset=UTF-8");
		PrintWriter out = response.getWriter();
		out.print(jsonMap);//返回json數值
		out.flush();
		out.close();
	}
	

	 

}
 

package com.hz.util;


import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.ProtocolException;
import java.net.URL;
import java.net.URLEncoder;

public class HttpTest {

	public static void main(String[] args) throws IOException {
	 
		post( );
		System.out.println("結束");
	}
	 
	
	private static void post() {
		 // 將url 以 open方法返回的urlConnection  連線強轉為HttpURLConnection連線  (標識一個url所引用的遠端物件連線)  
		HttpURLConnection connection = null;
		// 連線發起請求,處理伺服器響應  (從連接獲取到輸入流幷包裝為bufferedReader)  
		BufferedReader bf = null;
		StringBuilder sb = null;
		try {
			URL url = new URL("http://192.168.3.157:8080/HZ.Hbase/searchPageJson.html");  
			 
			 connection = (HttpURLConnection) url.openConnection();
			   
			 // 設定連線輸出流為true,預設false (post 請求是以流的方式隱式的傳遞引數)  
			 connection.setDoOutput(true);  
			   
			 // 設定連線輸入流為true  
			 connection.setDoInput(true);  
			   
			 // 設定請求方式為post  
			 connection.setRequestMethod("POST");  
			   
			 // post請求快取設為false  
			 connection.setUseCaches(false);  
			   
			 // 設定該HttpURLConnection例項是否自動執行重定向  
			 connection.setInstanceFollowRedirects(true);  
			   
			 // 設定請求頭裡面的各個屬性 (以下為設定內容的型別,設定為經過urlEncoded編碼過的from引數)  
			 // application/x-javascript text/xml->xml資料 application/x-javascript->json物件 application/x-www-form-urlencoded->表單資料  
			 // ;charset=utf-8 必須要，不然妙兜那邊會出現亂碼【★★★★★】  
			 connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");     
			   
			 // 建立連線 (請求未開始,直到connection.getInputStream()方法呼叫時才發起,以上各個引數設定需在此方法之前進行)  
			 connection.connect();  
			   
			 // 建立輸入輸出流,用於往連線裡面輸出攜帶的引數,(輸出內容為?後面的內容)  
			 DataOutputStream dataout = new DataOutputStream(connection.getOutputStream());  
			   
			 String app_key = "search="+ URLEncoder.encode("喜歡", "utf-8");        // 已修改【改為錯誤資料，以免資訊洩露】  
			 String agt_num = "&number"+ URLEncoder.encode("1", "utf-8");              // 已修改【改為錯誤資料，以免資訊洩露】  
			
			   
			 // 格式 parm = aaa=111&bbb=222&ccc=333&ddd=444  
			 String parm = app_key+ agt_num;  
			   
			 // 將引數輸出到連線  
			 dataout.writeBytes(parm);  
			   
			 // 輸出完成後重新整理並關閉流  
			 dataout.flush();  
			 dataout.close(); // 重要且易忽略步驟 (關閉流,切記!)   
			   
//         System.out.println(connection.getResponseCode());  
			   
			 bf = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));   
			 String line;  
			 sb = new StringBuilder();
			   
			 // 迴圈讀取流,若不到結尾處  
			 while ((line = bf.readLine()) != null) {  
//             sb.append(bf.readLine());  
			     sb.append(line).append(System.getProperty("line.separator"));  
			 }
		} catch (MalformedURLException e) {
			e.printStackTrace();
		} catch (ProtocolException e) {
			e.printStackTrace();
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}finally{
			try {
				bf.close();
			} catch (IOException e) {
				e.printStackTrace();
			connection.disconnect(); // 銷燬連線  
		}
         System.out.println(sb.toString());  
   
     }  
 
	}
}