WxUtil.java

package cn.wisenergy.service.util;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;
import java.util.*;

public class WxUtil {

    public static Map<String,Object>  getInfoByCode(String code,String appid,String key) {
        StringBuilder url = new StringBuilder("https://api.weixin.qq.com/sns/jscode2session?");
        url.append("appid=").append(appid);//appid设置
        url.append("&secret=").append(key);//secret设置
        url.append("&js_code=").append(code);//code设置
        url.append("&grant_type=authorization_code");
        Map<String, Object> map = null;
        try {
            HttpClient client = HttpClientBuilder.create().build();//构建一个Client
            HttpGet get = new HttpGet(url.toString());    //构建一个GET请求
            HttpResponse response = client.execute(get);//提交GET请求
            HttpEntity result = response.getEntity();//拿到返回的HttpResponse的"实体"
            String content = EntityUtils.toString(result);
            JSONObject res = JSONObject.parseObject(content);
            map=parseJSON2Map(res);
        } catch (Exception e) {
            e.printStackTrace();
        }
        System.out.println("code解析数据："+map);
        return map;

    }

    //JSONObject转map
    public static Map<String, Object> parseJSON2Map(JSONObject json) {
        Map<String, Object> map = new HashMap<>();
        // 最外层解析
        for (Object k :json.keySet()) {
            Object v = json.get(k);
            // 如果内层还是数组的话，继续解析
            if (v instanceof JSONArray) {
                List<Map<String, Object>> list = new ArrayList<>();
                for (Object o : (JSONArray) v) {
                    JSONObject json2 = (JSONObject) o;
                    list.add(parseJSON2Map(json2));
                }
                map.put(k.toString(), list);
            } else {
                map.put(k.toString(), v);
            }
        }
        return map;
    }

}