微信公众号开发总结(一)-程序入口

广西嘉华李家鸣 發表於 2020-1-6 15:37:00

微信公众号开发总结(一) --程序入口

最近准备利用业务时间写一个公众号练练手，查看了微信官方文档后，发现文档内容写的非常详细，前期粗略的看了下开发指南，比以前接入的第三方接口简单多了，于是磨刀霍霍按照开发指南一步步配置服务器、申请测试账号并在线调试，轻轻松松的就接入成功。
　　下面就是我接入微信、接收微信通知的代码，写的比较粗糙，望不吝赐教.
　　引入pom依赖
<div class="cnblogs_code">
<pre>
 <dependency>
 <groupId>com.github.binarywang</groupId>
 <artifactId>weixin-java-mp</artifactId>
 <version>3.6.0</version>
 </dependency></pre>
</div>
　　定义 wxMpService Bean
<div class="cnblogs_code">
<pre> @Bean
public WxMpService wxMpService() {

 WxMpService service = new WxMpServiceImpl();

 WxMpDefaultConfigImpl configStorage = new WxMpDefaultConfigImpl();
 //下面的四个参数替换成你自己的就可以了
 configStorage.setAppId(appid);
 configStorage.setSecret(secret);
 configStorage.setToken(token);
 configStorage.setAesKey(aesKey);

 Map<String, WxMpConfigStorage> config = new HashMap<> (); 
 config.put(appid,configStorage);
 service.setMultiConfigges(config);
 return service;
} </pre>
</div>
　　
<div class="cnblogs_code">
<pre>@Slf4j
@AllArgsConstructor
@RestController
@RequestMapping("/wx/portal/{appid}")
public class WxPortalController {
@Autowired
private WxMpService wxService;
@Autowired
private WxMpMessageRouter messageRouter;

/**验证消息 https://developers.weixin.qq.com/doc/offiaccount/Basic_Information/Access_Overview.html **/
@GetMapping(produces = "text/plain;charset=utf-8")
public String authGet(@PathVariable String appid,
 @RequestParam(name = "signature", required = false) String signature,
 @RequestParam(name = "timestamp", required = false) String timestamp,
 @RequestParam(name = "nonce", required = false) String nonce,
 @RequestParam(name = "echostr", required = false) String echostr) {
 log.info("\n接收到来自微信服务器的认证消息：[{}, {}, {}, {}]", signature,
 timestamp, nonce, echostr);
 if (StringUtils.isAnyBlank(signature, timestamp, nonce, echostr)) {
 throw new IllegalArgumentException("请求参数非法，请核实!");
 }

 if (!this.wxService.switchover(appid)) {
 throw new IllegalArgumentException(String.format("未找到对应appid=[%s]的配置，请核实！", appid));
 }

 if (wxService.checkSignature(timestamp, nonce, signature)) {
 return echostr;
 }
 return "非法请求";
}

/** 事件推送 https://developers.weixin.qq.com/doc/offiaccount/Message_Management/Receiving_event_pushes.html **/
@PostMapping(produces = "application/xml; charset=UTF-8")
public String post(@PathVariable String appid,
 @RequestBody String requestBody,
 @RequestParam("signature") String signature,
 @RequestParam("timestamp") String timestamp,
 @RequestParam("nonce") String nonce,
 @RequestParam("openid") String openid,
 @RequestParam(name = "encrypt_type", required = false) String encType,
 @RequestParam(name = "msg_signature", required = false) String msgSignature) {
 log.info("\n接收微信请求：, , encType=[{}], msgSignature=[{}],"
 + " timestamp=[{}], nonce=[{}], requestBody=[\n{}\n] ",
 openid, signature, encType, msgSignature, timestamp, nonce, requestBody);

 if (!this.wxService.switchover(appid)) {
 throw new IllegalArgumentException(String.format("未找到对应appid=[%s]的配置，请核实！", appid));
 }

 if (!wxService.checkSignature(timestamp, nonce, signature)) {
 throw new IllegalArgumentException("非法请求，可能属于伪造的请求！");
 }

 String out = null;
 if (encType == null) {
 // 明文传输的消息
 WxMpXmlMessage inMessage = WxMpXmlMessage.fromXml(requestBody);
 WxMpXmlOutMessage outMessage = this.route(inMessage);
 if (outMessage == null) {
 return "";
 }

 out = outMessage.toXml();
 } else if ("aes".equalsIgnoreCase(encType)) {
 // aes加密的消息
 WxMpXmlMessage inMessage = WxMpXmlMessage.fromEncryptedXml(requestBody, wxService.getWxMpConfigStorage(),
 timestamp, nonce, msgSignature);
 log.info("\n消息解密后内容为：\n{} ", inMessage.toString());
 WxMpXmlOutMessage outMessage = this.route(inMessage);
 if (outMessage == null) {
 return "";
 }

 out = outMessage.toEncryptedXml(wxService.getWxMpConfigStorage());
 }

 log.info("\n组装回复信息：{}", out);
 return out;
}

private WxMpXmlOutMessage route(WxMpXmlMessage message) {
 try {
 return this.messageRouter.route(message);
 } catch (Exception e) {
 log.error("路由消息时出现异常！", e);
 }
 return null;
}

}</pre>
</div>
　　　消息验证成功后，我们就可以获取AccessToken，公众号中接口几乎都会用到这个token，但是这个token并非保持不变的，有效期2H。
<img src="https://img2018.cnblogs.com/i-beta/1477997/202001/1477997-20200106153354947-1747954086.png" alt="" width="640" height="184">
 
 　　以上就是接入公众号的前期准备，服务器配置这些官方文档已经说的很清楚了，所以本文就没有介绍。 
来源：https://www.cnblogs.com/JackpotHan/p/12156628.html

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微信公众号开发总结(一) --程序入口