deliver/src/main/java/com/nosum/common/util/HttpClientUtils.java

package com.nosum.common.util;

import com.alibaba.fastjson.JSONObject;
import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import java.util.HashMap;
import java.util.Map;

/**
 * 请求工具类
 */
public class HttpClientUtils {

    /**
     * 发送get请求，利用java代码发送请求
     */
    public static String doGet(String url) {
        try {
            CloseableHttpClient httpclient = HttpClients.createDefault();
            HttpGet httpGet = new HttpGet(url);
            // 发送了一个http请求
            CloseableHttpResponse response = httpclient.execute(httpGet);
            // 如果响应200成功,解析响应结果
            if (response.getStatusLine().getStatusCode() == 200) {
                // 获取响应的内容
                HttpEntity responseEntity = response.getEntity();
                return EntityUtils.toString(responseEntity);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;

    }

    /**
     * 将字符串转换成map
     */
    public static Map<String, String> getMap(String responseEntity) {

        Map<String, String> map = new HashMap<>();
        // 以&来解析字符串
        String[] result = responseEntity.split("\\&");

        for (String str : result) {
            // 以=来解析字符串
            String[] split = str.split("=");
            // 将字符串存入map中
            if (split.length == 1) {
                map.put(split[0], null);
            } else {
                map.put(split[0], split[1]);
            }

        }
        return map;
    }

    /**
     * 通过json获得map
     */
    public static Map<String, String> getMapByJson(String responseEntity) {
        Map<String, String> map = new HashMap<>();
        JSONObject jsonObject = JSONObject.parseObject(responseEntity);
        for (Map.Entry<String, Object> entry : jsonObject.entrySet()) {
            String key = entry.getKey();
            // 将obj转换成string
            String value = String.valueOf(entry.getValue());
            map.put(key, value);
        }
        return map;
    }
}