java开发微信公众号

1、使用java语言开发
2、服务器地址使用ngrok
3、gitlib管理代码(仓库地址在本文底部)
4、目前已完成的功能：模板推送、网页授权、群发图文消息、单图文消息、自定义菜单等。

准备工作

• 去申请微信测试号
• 去下载内网穿透工具

ngrok的下载使用

• 点击上方连接进入官网后，使用GItHub账号登陆。
• 进去之后直接下载
• 下载完成后点击最左边的Auth，然后copy自己的隧道身份验证
• 接着在下载路径进入cmd

ngrok -authtoken 复制的秘钥 -subdomain

• 最后启动

1、双击.exe文件
2、输入命令8080为要映射的端口 
ngrok  http 8080
3、回车后如下(Forwarding         后面的域名可以在外网访问到本机8080端口)
ngrok by @inconshreveable                                       (Ctrl+C to quit)

Session Status                online
Account                       1468216541 (Plan: Free)
Update                        update available (version 2.3.35, Ctrl-U to update
Version                       2.3.34
Region                        United States (us)
Web Interface                 http://127.0.0.1:4040
Forwarding                    http://b2953b06.ngrok.io -> http://localhost:8080
Forwarding                    https://b2953b06.ngrok.io -> http://localhost:8080

Connections                   ttl     opn     rt1     rt5     p50     p90
                              0       0       0.00    0.00    0.00    0.00

开始开发

1、拿到aapId、appsecret和设置token、URL

2、编写后台接口

package com.wechat.demo.module.wechat.controller;

import com.wechat.demo.common.AuthorizationUtil;
import com.wechat.demo.constant.InvariableAttribute;
import com.wechat.demo.module.wechat.service.CoreSevice;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
/**
* 微信进行认证时请求login的get请求的接口认证通过后
* 所有操作会进入该请求的post请求中
* 所以处理用户订阅取消等一系列的操作在post请求中完成
* get只完成认证
*/
@Controller
@RequestMapping("/authorization")
public class AuthorizationController {
     

    private final static Logger log = LoggerFactory.getLogger(AuthorizationController.class);

    @Autowired
    CoreSevice coreSevice;

    @GetMapping("/login")
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
     
        log.info("----开始请求检验-----");
        String signature = request.getParameter("signature");
        log.info("获取到<" + signature + ">");
        String timestamp = request.getParameter("timestamp");
        log.info("获取到<" + timestamp + ">");
        String nonce = request.getParameter("nonce");
        log.info("获取到<" + nonce + ">");
        String echostr = request.getParameter("echostr");
        log.info("获取到<" + echostr + ">");
        PrintWriter print = response.getWriter();
        if (AuthorizationUtil.CheckSignature(signature,timestamp,nonce)){
     
            print.write(echostr);
        }
        print.flush();
        print.close();
    }

    @PostMapping("/login")
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws Exception {
     
        request.setCharacterEncoding("UTF-8");
        request.setCharacterEncoding("UTF-8");
        response.setContentType("application/json; charset=utf-8");
        PrintWriter out = response.getWriter();
        String result = coreSevice.pareRequest(request);
        if(InvariableAttribute.RETURN_SUCCESS.equals(result)){
     
            out.print(InvariableAttribute.RETURN_SUCCESS);
        }else {
     
            out.print(result);
        }
        out.flush();
        out.close();
    }


}

认证工具类

package com.wechat.demo.common;

import com.wechat.demo.constant.InvariableAttribute;

import java.security.MessageDigest;
import java.util.Arrays;

public class AuthorizationUtil {
     
    //进行字典排序
    public static boolean CheckSignature(String signature,String timestamp,String nonce){
     
        String[] arr = new String[]{
     InvariableAttribute.TOKEN,timestamp,nonce};
        Arrays.sort(arr);
        StringBuffer content = new StringBuffer();
        for(int i = 0;i<arr.length;i++){
     
            content.append(arr[i]);
        }
        String temp = getShal(content.toString());
        return temp.equals(signature);
    }

    //进行sha1加密
    public static String getShal(String str){
     
        if(null ==str || 0 == str.length()){
     
            return null;
        }
        char[] hexDigts = {
     '0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'};
        try {
     
            MessageDigest mdTemp = MessageDigest.getInstance("SHA1");
            mdTemp.update(str.getBytes("UTF-8"));
            byte[] md = mdTemp.digest();
            int j = md.length;
            char[] buf = new char[j*2];
            int k = 0;
            for(int i = 0 ; i < j ; i ++){
     
                byte byte0 = md[i];
                buf[k++] = hexDigts[byte0 >>> 4 & 0xf];
                buf[k++] = hexDigts[byte0 & 0xf];
            }
            return new String(buf);
        }catch (Exception e){
     
            return null;
        }
    }
}

常量类

package com.wechat.demo.constant;

public class InvariableAttribute {
     
    //设置的token
    public static final String TOKEN = "自定义的token";

    //appid
    public static final String APPID = "填写获取的appid";

    //appsecret
    public static final String APPSECRET = "appsercret";

    //接收微信服务器返回的请求成功的标志位
    public static final String RETURN_SUCCESS = "success";

}

地址连接

git仓库地址
微信开发文档地址

结语

微信公众号的开发流程就是这些。源码在git仓库。
水平有限，写的不好的地方望指教。