背景:使用微信公眾號接口,生成帶參數的二維碼.
沖突:postman調試正常，在項目使用restTemplate發送就是不成功.
問題1:可能是url不對。
問題2:可能請求的json對象，格式不對。
問題3:restTemplate，json解析不對。
解決1:
postman : https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token=
項目:public static final String POST_CREATE_QRCODE_URL="https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token={access_token}";
結果1:結果一致.
解決2:
postman:
項目日志:
結果2:完全一致.
解決3:打開springBoot的restTemplate日志設置成debug.
發送請求:
日志如下:
參數信息:{"action_info":{"scene":{"scene_id":1,"scene_str":"856b8ffb-a6ca-4bc9-813b-1419a6530ac6"}},"action_name":"QR_SCENE","expire_seconds":300}
參數信息:{"action_info":{"scene":{"scene_str":"856b8ffb-a6ca-4bc9-813b-1419a6530ac6","scene_id":1}},"action_name":"QR_SCENE","expire_seconds":300}
HTTP POST https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token=32_ZTBg5kzh3hUMoaP7xJik8YAFJkoO5gNwjosG1XvI2b4MORGLNitSV4RQSF2JIOx_4MrDGZ5sbNq8bEJ4miwOfK2mcO64TyMIweEUOR5IsY49Kl2vsQuq1plmS2eBQbhzHZVK1HOzFvh125jPPLJhAJALHF
Accept=[application/xml, text/xml, application/json, application/*+xml, application/*+json]
Writing [{"action_info":{"scene":{"scene_str":"856b8ffb-a6ca-4bc9-813b-1419a6530ac6","scene_id":1}},"action_name":"QR_SCENE","expire_seconds":300}] with org.springframework.http.converter.xml.MappingJackson2XmlHttpMessageConverter
Response 200 OK
Reading to [com.alibaba.fastjson.JSONObject]
返回結果:{"errcode":40052,"errmsg":"invalid action name hint: [PQ4c.a00331960]"}
關鍵信息:org.springframework.http.converter.xml.MappingJackson2XmlHttpMessageConverter ??參數轉換使用的xml轉換器.
接下來定位到:參數轉換問題
查看源代碼:
啊啊啊啊啊，返回的是Object對象.
查看其他方法:
修改為toJSONString做測試
日志如下:
參數信息:{"action_info":{"scene":{"scene_id":1,"scene_str":"323a31ec-906a-4cb2-a24f-fb846fb16997"}},"action_name":"QR_SCENE","expire_seconds":300}
參數信息:{"action_info":{"scene":{"scene_str":"323a31ec-906a-4cb2-a24f-fb846fb16997","scene_id":1}},"action_name":"QR_SCENE","expire_seconds":300}
HTTP POST https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token=32_ZTBg5kzh3hUMoaP7xJik8YAFJkoO5gNwjosG1XvI2b4MORGLNitSV4RQSF2JIOx_4MrDGZ5sbNq8bEJ4miwOfK2mcO64TyMIweEUOR5IsY49Kl2vsQuq1plmS2eBQbhzHZVK1HOzFvh125jPPLJhAJALHF
Accept=[application/xml, text/xml, application/json, application/*+xml, application/*+json]
Writing [{"action_info":{"scene":{"scene_id":1,"scene_str":"323a31ec-906a-4cb2-a24f-fb846fb16997"}},"action_name":"QR_SCENE","expire_seconds":300}] with org.springframework.http.converter.StringHttpMessageConverter
Response 200 OK
Reading to [com.alibaba.fastjson.JSONObject]
返回結果:{"ticket":"gQEz8DwAAAAAAAAAAS5odHRwOi8vd2VpeGluLnFxLmNvbS9xLzAyU2xwOXhsRGpkLTIxd01nak51MU4AAgQED5NeAwQsAQAA","expire_seconds":300,"url":"http://weixin.qq.com/q/02Slp9xlDjd-21wMgjNu1N"}
關鍵信息:StringHttpMessageConverter
返回結果:正常.
總結:JSON.toJSON返回Object對象，會調用MappingJackson2XmlHttpMessageConverter，JSON.toJSONString返回String對象，會調用StringHttpMessageConverter，切記雖然轉換的結果都一樣，但是restTemplate調用的轉換器不同,啊啊啊啊啊啊啊.