调接口获取数据的几种方式

package com.cuslink.visual.controller;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.ResponseBody;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.cuslink.visual.pojo.DataParam;

public class GroundData {
@GetMapping ("/topicList")
@ResponseBody
public Map HttpGetTopList() throws IOException {
BufferedReader in = null;
String urlNameString = “http://10.97.128.167/search/client/search/topic”;
try {
URL realUrl = new URL(urlNameString);
URLConnection connection = realUrl.openConnection();
connection.setRequestProperty(“accept”, “/”);
connection.setRequestProperty(“Content-Type”, “application/json;charset=UTF-8”);
connection.setRequestProperty(“connection”, “Keep-Alive”);
connection.setRequestProperty(“user-agent”, “Mozilla/4.0 (compatible; MSIE 5.0; Windows NT;DigExt)”);
connection.setRequestProperty(“whoami”, “cci-haiguan”);
connection.connect();
InputStream inputStream = connection.getInputStream();

            BufferedReader isr = new BufferedReader(new InputStreamReader(inputStream, "utf-8"));
            int len = 0;
            byte[] rs = new byte[1024];
            String result = "";
            String s = "";
            while ((s = isr.readLine()) != null) {
                result += s;
            }
            JSONObject fromObject = JSONObject.parseObject(result);
            JSONArray h986Array = JSONArray.parseArray(fromObject.getString("data"));

            ArrayList arrayList = new ArrayList();
            for (Object object : h986Array) {
                Map map = JSONObject.parseObject(JSONObject.toJSONString(object), Map.class);
                String object3 = map.get("children").toString();
                JSONArray parseArray = JSONArray.parseArray(object3);
                for (Object object4 : parseArray) {
                    Map map1 = JSONObject.parseObject(JSONObject.toJSONString(object4), Map.class);
                    String objId = (String) map1.get("objId");
                    String primaryTableId = (String) map1.get("primaryTableId");
                    Object clsName = map1.get("clsName");
                    Map hashMap = new HashMap<>();
                    hashMap.put("topic", objId);
                    hashMap.put("table" , primaryTableId);
                    hashMap.put("clsName", clsName);
                    arrayList.add(hashMap);

                }

            }
            Map stringObjectHashMap = new HashMap<>();
            stringObjectHashMap.put("row",arrayList);
            return stringObjectHashMap;
        } catch (Exception e) {
            System.out.println("发送GET请求出现异常！" + e);
            e.printStackTrace();
        }
        // 使用finally块来关闭输入流
        finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
        return null;
    }

    @PostMapping("/yunqin")
    @ResponseBody
    public Map yunqinData(@RequestBody Map params) {
        String ip="http://10.97.128.167";
        String url=ip+"/search/client/search";
        String key=params.get("key");
        String topic=params.get("topic");
        String table=params.get("table");
        int from = Integer.parseInt(params.get("from"));
        int size=Integer.parseInt(params.get("size"));
        String json = "{\r\n" +
                "	\"key\":\""+key+"\",\r\n" +
                "	\"topic\":\""+topic+"\",\r\n" +
                "	\"table\":\""+table+"\",\r\n" +
                "	\"from\":"+from+",\r\n" +
                "	\"size\":"+size+",\r\n" +
                "	\"isAcc\":false\r\n" +
                "}";
        String datatotal = httpPost(url,json);
        JSONObject parseObject = JSON.parseObject(datatotal);
        String datastring = parseObject.getString("data");
        JSONObject data = JSON.parseObject(datastring);
        Map map1 = JSONObject.parseObject(JSONObject.toJSONString(data), Map.class);
        Object total = map1.get("total");
        Object from1= map1.get("from");
        Object size1 = map1.get("size");
        String data1 = map1.get("data").toString();
        JSONArray objects = JSONArray.parseArray(data1);
        ArrayList

// connection.setRequestProperty(“whoami”, “cci-haiguan”);
OutputStreamWriter paramout = new OutputStreamWriter(connection.getOutputStream(),“UTF-8”);
paramout.write(json);
paramout.flush();
BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), “UTF-8”));
String line;
while ((line = reader.readLine()) != null) {
data.append(line);
}
paramout.close();
reader.close();
} catch (Exception e) {
e.printStackTrace();
}
return data.toString();
}

    public static void main(String[] args) {
		DataParam dataParam = new DataParam();
		dataParam.setAPP_ID("924169EA-8505-4B19-9177-CB437E6DE5EE");
		dataParam.setMESSAGE_CODE("Z001");
		net.sf.json.JSONObject jsonObject = net.sf.json.JSONObject.fromObject(dataParam);
		String jsonStr = jsonObject.toString();
		String url = "http://10.200.5.10/ExtApi/Api/Data/Query";
		String data = httpPost(url,jsonStr);
		String datas = "";
		
		JSONObject json = JSONObject.parseObject(data);
		datas = json.getString("Datas");

// JSONArray jon = JSONArray.parseArray(datas); //json数组
List> listObj = (List>)JSONArray.parse(datas);
for(Map mapList:listObj) {
for(Map.Entry entry: mapList.entrySet()) {
System.out.println(“key:”+entry.getKey()+“value:”+ entry.getValue());
}
}
// for(int i =0; i // JSONObject don = jon.getJSONObject(i);
// Map xxMap = don.parseObject(don);
// }

// Map jsonToMap = JSONObject.parseObject(datas);
// Iterator> it = jsonToMap.entrySet().iterator();
// while(it.hasNext()) {
// Entry entry = it.next();
// System.out.println(“key:”+entry.getKey()+“value:”+entry.getValue());
// }
}

}