微信公众平台接口调用第一步（获取access

微信公众平台接口调用第一步（获取access_token）

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发布时间：2019-06-07

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最近公司需要开发微信公众号，闲着无聊就写写博客，希望能帮到你我

上代码：

package test;import java.util.List;import java.util.ArrayList;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.HttpStatus;import org.apache.http.client.HttpClient;import org.apache.http.client.methods.HttpGet;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.util.EntityUtils;import com.google.gson.JsonObject;import com.google.gson.JsonParser;public class GetAccess_token {    public static final String GET_TOKEN_URL = "https://api.weixin.qq.com/cgi-bin/token";// 获取access    //public static final String GET_Base = "https://api.weixin.qq.com/cgi-bin/user/get";//// url    public static final String APP_ID = "公众号appid";    public static final String SECRET = "公众号SECRET";    public static  String accessToken = null;        // 获取token    public static String getToken(String apiurl, String appid, String secret) {        String turl = String.format(                "%s?grant_type=client_credential&appid=%s&secret=%s", apiurl,                appid, secret);        HttpClient client = new DefaultHttpClient();        HttpGet get = new HttpGet(turl);        JsonParser jsonparer = new JsonParser();// 初始化解析json格式的对象        String result = null;        try {            HttpResponse res = client.execute(get);            String responseContent = null; // 响应内容            HttpEntity entity = res.getEntity();            responseContent = EntityUtils.toString(entity, "utf-8");            JsonObject json = jsonparer.parse(responseContent)                    .getAsJsonObject();            // 将json字符串转换为json对象            if (res.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {                if (json.get("errcode") != null) {
   // 错误时微信会返回错误码等信息，{"errcode":40013,"errmsg":"invalid appid"}                } else {
   // 正常情况下{"access_token":"ACCESS_TOKEN","expires_in":7200}                    result = json.get("access_token").getAsString();                }            }        } catch (Exception e) {            e.printStackTrace();        } finally {            // 关闭连接 ,释放资源            client.getConnectionManager().shutdown();                    }return result;    }            public static void main(String[] args) throws Exception {        System.out.println("=========1获取token=========");         accessToken = getToken(GET_TOKEN_URL, APP_ID, SECRET);// 获取token        if (accessToken != null){            System.out.println("accessToken:" + accessToken);        }                             }}

所需jar: