微信公众号关注/取消关注事件推送开发记录

一、奉上官方文档

关注/取消关注事件 | 微信开放文档微信开发者平台文档https://developers.weixin.qq.com/doc/offiaccount/Message_Management/Receiving_event_pushes.html

二、后端接口开发

1.验证消息的合法性


private Static String token = "微信配置的token，记得要改喔，不然配置提交会报token验证失败";
 
public Boolean checkSignature(String timestamp,String nonce,String signature){
 
        String checkText = null;
        Boolean res = false;
 
            if(null != signature){
 
                //对Token,timestamp,nonce 按字典顺序
                String[] paramArr = new String[]{token,timestamp,nonce};
                Array.sort(paramArr);
                //将排序后的结果拼接成一个字符串
                String content = paramArr[0].concat(paramArr[1].concat.paramArr[2]);
                try{
 
                     //对接后的字符串进行SHA-1加密
                    MessageDigest md = MessageDigest.getInstance("SHA-1);
                    byte[] digest  = md.digest(digest);
                    checkText = byteToStr(digest);
                      //将加密后的字符串与signature对比
                    res = checkTex!=null?checkText.equals(signature.toUpperCase()):false;
                   
                    }catch(NoSuchAlgorithmException e){
                        e.printStackTrace();
                }
            }
            return res;
}


    /**
     * 将字节数组转化十六进制字符串
     * @param byteArrays 字符数组
     * @return 字符串
     */
private static String byteToStr(byte[] byteArrays){
 
    String str = "";
    for(int i=0;i<byteArrays.length;i++){
 
        str+= byteToHexStr(byteArrays[i]);
     }
    
    return str;
 
}
 
  /**
     *  将字节转化为十六进制字符串
     * @param myByte 字节
     * @return 字符串
     */
 
private static String byteToHexStr(byte myByte) {
        char[] Digit = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
        char[] tampArr = new char[2];
        tampArr[0] = Digit[(myByte >>> 4) & 0X0F];
        tampArr[1] = Digit[myByte & 0X0F];
        String str = new String(tampArr);
        return str;
    }