# Spring Boot 微信小程序获取 openid 和 session_key
# 一、小程序端
wx.login({
success (res) {
if (res.code) {
console.log("res = " + res.code);
//发起网络请求
wx.request({
url: 'http://localhost:8090/onLogin',
data: {
code: res.code
},
method: 'GET'
})
} else {
console.log('登录失败！' + res.errMsg)
}
}
})
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# 二、spring boot 服务端
# 2.1 导入依赖
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>2.0.32</version>
</dependency>
<dependency>
<groupId>com.github.kevinsawicki</groupId>
<artifactId>http-request</artifactId>
<version>6.0</version>
</dependency>
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# 2.2 java 代码
/**
* 微信登陆，获取 openid 和 session_key
*
* @param code 登录凭证
* @throws IOException
*/
@RequestMapping(value = "/onLogin")
public void wxLogin(@RequestParam("code") String code) throws IOException {
System.out.println("code = " + code);
Map<String, String> data = new HashMap<String, String>();
data.put("appid", "app_id");
data.put("secret", "app_secret");
data.put("js_code", code);
data.put("grant_type", "authorization_code");
String response = HttpRequest.get("https://api.weixin.qq.com/sns/jscode2session").form(data).body();
JSONObject obj = JSON.parseObject(response);
String openid = obj.getString("openid");
String session_key = obj.getString("session_key");
System.out.println("openid = " + openid);
System.out.println("session_key = " + session_key);
}
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