文章目錄

• • 介紹
  • • 1、獲取code并向服務器發送請求
    • 2、引入發送HTTP請求的maven依賴
    • 3、封裝HTTP請求工具類
    • 4、編寫控制器

介紹

菜鳥教你一步到位
注意事項：

• 必須是GET請求
• 微信發送的code碼只能使用一次

1、獲取code并向服務器發送請求

注：http://localhost:8080/portal/blog/app/login對應第4步的控制器

wx.login({success (res) {console.log(res);if (res.code) {//發起網絡請求wx.request({url: 'http://localhost:8080/portal/blog/app/login', //自己服務器的地址data: {code: res.code //向自己服務器傳遞的code參數},method:'POST', //記得是post請求success(res){console.log(res);}})} else {console.log('登錄失敗！' + res.errMsg)}}})

2、引入發送HTTP請求的maven依賴

<dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpclient</artifactId><version>4.5.13</version> </dependency><!-- JSON工具類 --> <dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId> </dependency>

3、封裝HTTP請求工具類

import com.alibaba.fastjson.JSON; 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 org.springframework.stereotype.Component;import java.io.IOException; import java.util.HashMap;/*** 微信登錄，獲取openid* @author XinLiu*/ @Component public class WxHttpClient {private final static String BASE_URL = "https://api.weixin.qq.com/sns/jscode2session";private final static String appid = "自己的appid ";private final static String secret = "自己的secret ";public static HashMap<String, String> get(String appid, String secret, String code) throws IOException {String url = BASE_URL +"?appid=" +appid +"&secret=" +secret +"&js_code=" +code +"&grant_type=authorization_code";HttpGet httpGet = new HttpGet(url);CloseableHttpClient client = HttpClients.createDefault();CloseableHttpResponse response = client.execute(httpGet);HttpEntity entity = response.getEntity();String s = EntityUtils.toString(entity);JSONObject object = JSON.parseObject(s);String session_key = (String) object.get("session_key");String openid = (String) object.get("openid");HashMap<String, String> res = new HashMap<>();res.put("openid", openid);res.put("session_key", session_key);return res;}public static HashMap<String, String> get(String code) throws IOException {return get(appid, secret, code);} }

4、編寫控制器

@PostMapping("login") public AjaxResult login(@RequestBody HashMap<String, String> code) throws IOException {HashMap<String, String> map = WxHttpClient.get(code.get("code"));System.out.println(map);return AjaxResult.success();}

打印結果格式如下：

{openid=odfCW5Kz3SfxpydxJH7dIHiCUwSo, session_key=FvEoC08amf16G0texJaBcA==}

可以通過get(key)的方式取到值，具體如下：

String openid = map.get("openid"); String session_key = map.get("session_key");System.out.println("openid: "+openid); System.out.println("session_key: "+session_key);

結果：

openid: odfCW5Kz3SfxpydxJH7dIHiCUwSo session_key: 9reHgOu+urg1W1tWI32GVA==

總結

以上是生活随笔為你收集整理的四步获取微信登录所需的openid和session_key的全部內容，希望文章能夠幫你解決所遇到的問題。

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